Merge master.kernel.org:/pub/scm/linux/kernel/git/mingo/mutex-2.6

2024-08-23 09:19:51 +00:00 · 2006-01-09 17:31:38 -08:00 · 2006-01-09 17:31:38 -08:00 · 80c0531514
commit 80c0531514
parent a457aa6c2b 11b751ae8c
198 changed files with 2754 additions and 649 deletions
--- a/Documentation/DocBook/kernel-locking.tmpl
+++ b/Documentation/DocBook/kernel-locking.tmpl
@ -222,7 +222,7 @@
   <title>Two Main Types of Kernel Locks: Spinlocks and Semaphores</title>

   <para>
-     There are two main types of kernel locks.  The fundamental type
+     There are three main types of kernel locks.  The fundamental type
     is the spinlock 
     (<filename class="headerfile">include/asm/spinlock.h</filename>),
     which is a very simple single-holder lock: if you can't get the 
@ -230,16 +230,22 @@
     very small and fast, and can be used anywhere.
   </para>
   <para>
-     The second type is a semaphore
+     The second type is a mutex
+     (<filename class="headerfile">include/linux/mutex.h</filename>): it
+     is like a spinlock, but you may block holding a mutex.
+     If you can't lock a mutex, your task will suspend itself, and be woken
+     up when the mutex is released.  This means the CPU can do something
+     else while you are waiting.  There are many cases when you simply
+     can't sleep (see <xref linkend="sleeping-things"/>), and so have to
+     use a spinlock instead.
+   </para>
+   <para>
+     The third type is a semaphore
     (<filename class="headerfile">include/asm/semaphore.h</filename>): it
     can have more than one holder at any time (the number decided at
     initialization time), although it is most commonly used as a
-     single-holder lock (a mutex).  If you can't get a semaphore,
-     your task will put itself on the queue, and be woken up when the
-     semaphore is released.  This means the CPU will do something
-     else while you are waiting, but there are many cases when you
-     simply can't sleep (see <xref linkend="sleeping-things"/>), and so
-     have to use a spinlock instead.
+     single-holder lock (a mutex).  If you can't get a semaphore, your
+     task will be suspended and later on woken up - just like for mutexes.
   </para>
   <para>
     Neither type of lock is recursive: see
--- a/Documentation/mutex-design.txt
+++ b/Documentation/mutex-design.txt
@ -0,0 +1,135 @@
+Generic Mutex Subsystem
+
+started by Ingo Molnar <mingo@redhat.com>
+
+  "Why on earth do we need a new mutex subsystem, and what's wrong
+   with semaphores?"
+
+firstly, there's nothing wrong with semaphores. But if the simpler
+mutex semantics are sufficient for your code, then there are a couple
+of advantages of mutexes:
+
+ - 'struct mutex' is smaller on most architectures: .e.g on x86,
+   'struct semaphore' is 20 bytes, 'struct mutex' is 16 bytes.
+   A smaller structure size means less RAM footprint, and better
+   CPU-cache utilization.
+
+ - tighter code. On x86 i get the following .text sizes when
+   switching all mutex-alike semaphores in the kernel to the mutex
+   subsystem:
+
+        text    data     bss     dec     hex filename
+     3280380  868188  396860 4545428  455b94 vmlinux-semaphore
+     3255329  865296  396732 4517357  44eded vmlinux-mutex
+
+   that's 25051 bytes of code saved, or a 0.76% win - off the hottest
+   codepaths of the kernel. (The .data savings are 2892 bytes, or 0.33%)
+   Smaller code means better icache footprint, which is one of the
+   major optimization goals in the Linux kernel currently.
+
+ - the mutex subsystem is slightly faster and has better scalability for
+   contended workloads. On an 8-way x86 system, running a mutex-based
+   kernel and testing creat+unlink+close (of separate, per-task files)
+   in /tmp with 16 parallel tasks, the average number of ops/sec is:
+
+    Semaphores:                        Mutexes:
+
+    $ ./test-mutex V 16 10             $ ./test-mutex V 16 10
+    8 CPUs, running 16 tasks.          8 CPUs, running 16 tasks.
+    checking VFS performance.          checking VFS performance.
+    avg loops/sec:      34713          avg loops/sec:      84153
+    CPU utilization:    63%            CPU utilization:    22%
+
+   i.e. in this workload, the mutex based kernel was 2.4 times faster
+   than the semaphore based kernel, _and_ it also had 2.8 times less CPU
+   utilization. (In terms of 'ops per CPU cycle', the semaphore kernel
+   performed 551 ops/sec per 1% of CPU time used, while the mutex kernel
+   performed 3825 ops/sec per 1% of CPU time used - it was 6.9 times
+   more efficient.)
+
+   the scalability difference is visible even on a 2-way P4 HT box:
+
+    Semaphores:                        Mutexes:
+
+    $ ./test-mutex V 16 10             $ ./test-mutex V 16 10
+    4 CPUs, running 16 tasks.          8 CPUs, running 16 tasks.
+    checking VFS performance.          checking VFS performance.
+    avg loops/sec:      127659         avg loops/sec:      181082
+    CPU utilization:    100%           CPU utilization:    34%
+
+   (the straight performance advantage of mutexes is 41%, the per-cycle
+    efficiency of mutexes is 4.1 times better.)
+
+ - there are no fastpath tradeoffs, the mutex fastpath is just as tight
+   as the semaphore fastpath. On x86, the locking fastpath is 2
+   instructions:
+
+    c0377ccb <mutex_lock>:
+    c0377ccb:       f0 ff 08                lock decl (%eax)
+    c0377cce:       78 0e                   js     c0377cde <.text.lock.mutex>
+    c0377cd0:       c3                      ret
+
+   the unlocking fastpath is equally tight:
+
+    c0377cd1 <mutex_unlock>:
+    c0377cd1:       f0 ff 00                lock incl (%eax)
+    c0377cd4:       7e 0f                   jle    c0377ce5 <.text.lock.mutex+0x7>
+    c0377cd6:       c3                      ret
+
+ - 'struct mutex' semantics are well-defined and are enforced if
+   CONFIG_DEBUG_MUTEXES is turned on. Semaphores on the other hand have
+   virtually no debugging code or instrumentation. The mutex subsystem
+   checks and enforces the following rules:
+
+   * - only one task can hold the mutex at a time
+   * - only the owner can unlock the mutex
+   * - multiple unlocks are not permitted
+   * - recursive locking is not permitted
+   * - a mutex object must be initialized via the API
+   * - a mutex object must not be initialized via memset or copying
+   * - task may not exit with mutex held
+   * - memory areas where held locks reside must not be freed
+   * - held mutexes must not be reinitialized
+   * - mutexes may not be used in irq contexts
+
+   furthermore, there are also convenience features in the debugging
+   code:
+
+   * - uses symbolic names of mutexes, whenever they are printed in debug output
+   * - point-of-acquire tracking, symbolic lookup of function names
+   * - list of all locks held in the system, printout of them
+   * - owner tracking
+   * - detects self-recursing locks and prints out all relevant info
+   * - detects multi-task circular deadlocks and prints out all affected
+   *   locks and tasks (and only those tasks)
+
+Disadvantages
+-------------
+
+The stricter mutex API means you cannot use mutexes the same way you
+can use semaphores: e.g. they cannot be used from an interrupt context,
+nor can they be unlocked from a different context that which acquired
+it. [ I'm not aware of any other (e.g. performance) disadvantages from
+using mutexes at the moment, please let me know if you find any. ]
+
+Implementation of mutexes
+-------------------------
+
+'struct mutex' is the new mutex type, defined in include/linux/mutex.h
+and implemented in kernel/mutex.c. It is a counter-based mutex with a
+spinlock and a wait-list. The counter has 3 states: 1 for "unlocked",
+0 for "locked" and negative numbers (usually -1) for "locked, potential
+waiters queued".
+
+the APIs of 'struct mutex' have been streamlined:
+
+ DEFINE_MUTEX(name);
+
+ mutex_init(mutex);
+
+ void mutex_lock(struct mutex *lock);
+ int  mutex_lock_interruptible(struct mutex *lock);
+ int  mutex_trylock(struct mutex *lock);
+ void mutex_unlock(struct mutex *lock);
+ int  mutex_is_locked(struct mutex *lock);
+
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@ -222,6 +222,10 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
 {
 	if (PageHighMem(page))
 		return;
+	if (!enable)
+		mutex_debug_check_no_locks_freed(page_address(page),
+						 page_address(page+numpages));
+
 	/* the return value is ignored - the calls cannot fail,
 	 * large pages are disabled at boot time.
 	 */
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@ -137,7 +137,7 @@ spufs_delete_inode(struct inode *inode)
 static void spufs_prune_dir(struct dentry *dir)
 {
 	struct dentry *dentry, *tmp;
-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) {
 		spin_lock(&dcache_lock);
 		spin_lock(&dentry->d_lock);
@ -154,7 +154,7 @@ static void spufs_prune_dir(struct dentry *dir)
 		}
 	}
 	shrink_dcache_parent(dir);
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);
 }

 static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
@ -162,15 +162,15 @@ static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
 	struct spu_context *ctx;

 	/* remove all entries */
-	down(&root->i_sem);
+	mutex_lock(&root->i_mutex);
 	spufs_prune_dir(dir_dentry);
-	up(&root->i_sem);
+	mutex_unlock(&root->i_mutex);

 	/* We have to give up the mm_struct */
 	ctx = SPUFS_I(dir_dentry->d_inode)->i_ctx;
 	spu_forget(ctx);

-	/* XXX Do we need to hold i_sem here ? */
+	/* XXX Do we need to hold i_mutex here ? */
 	return simple_rmdir(root, dir_dentry);
 }

@ -330,7 +330,7 @@ long spufs_create_thread(struct nameidata *nd,
 out_dput:
 	dput(dentry);
 out_dir:
-	up(&nd->dentry->d_inode->i_sem);
+	mutex_unlock(&nd->dentry->d_inode->i_mutex);
 out:
 	return ret;
 }
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@ -215,7 +215,7 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec,
 	unsigned offset, bv_offs;
 	int len, ret;

-	down(&mapping->host->i_sem);
+	mutex_lock(&mapping->host->i_mutex);
 	index = pos >> PAGE_CACHE_SHIFT;
 	offset = pos & ((pgoff_t)PAGE_CACHE_SIZE - 1);
 	bv_offs = bvec->bv_offset;
@ -278,7 +278,7 @@ static int do_lo_send_aops(struct loop_device *lo, struct bio_vec *bvec,
 	}
 	ret = 0;
 out:
-	up(&mapping->host->i_sem);
+	mutex_unlock(&mapping->host->i_mutex);
 	return ret;
 unlock:
 	unlock_page(page);
@ -527,12 +527,12 @@ static int loop_make_request(request_queue_t *q, struct bio *old_bio)
 	lo->lo_pending++;
 	loop_add_bio(lo, old_bio);
 	spin_unlock_irq(&lo->lo_lock);
-	up(&lo->lo_bh_mutex);
+	complete(&lo->lo_bh_done);
 	return 0;

 out:
 	if (lo->lo_pending == 0)
-		up(&lo->lo_bh_mutex);
+		complete(&lo->lo_bh_done);
 	spin_unlock_irq(&lo->lo_lock);
 	bio_io_error(old_bio, old_bio->bi_size);
 	return 0;
@ -593,23 +593,20 @@ static int loop_thread(void *data)
 	lo->lo_pending = 1;

 	/*
-	 * up sem, we are running
+	 * complete it, we are running
 	 */
-	up(&lo->lo_sem);
+	complete(&lo->lo_done);

 	for (;;) {
 		int pending;

-		/*
-		 * interruptible just to not contribute to load avg
-		 */
-		if (down_interruptible(&lo->lo_bh_mutex))
+		if (wait_for_completion_interruptible(&lo->lo_bh_done))
 			continue;

 		spin_lock_irq(&lo->lo_lock);

 		/*
-		 * could be upped because of tear-down, not pending work
+		 * could be completed because of tear-down, not pending work
 		 */
 		if (unlikely(!lo->lo_pending)) {
 			spin_unlock_irq(&lo->lo_lock);
@ -632,7 +629,7 @@ static int loop_thread(void *data)
 			break;
 	}

-	up(&lo->lo_sem);
+	complete(&lo->lo_done);
 	return 0;
 }

@ -843,7 +840,7 @@ static int loop_set_fd(struct loop_device *lo, struct file *lo_file,
 	set_blocksize(bdev, lo_blocksize);

 	kernel_thread(loop_thread, lo, CLONE_KERNEL);
-	down(&lo->lo_sem);
+	wait_for_completion(&lo->lo_done);
 	return 0;

 out_putf:
@ -909,10 +906,10 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
 	lo->lo_state = Lo_rundown;
 	lo->lo_pending--;
 	if (!lo->lo_pending)
-		up(&lo->lo_bh_mutex);
+		complete(&lo->lo_bh_done);
 	spin_unlock_irq(&lo->lo_lock);

-	down(&lo->lo_sem);
+	wait_for_completion(&lo->lo_done);

 	lo->lo_backing_file = NULL;

@ -1289,8 +1286,8 @@ static int __init loop_init(void)
 		if (!lo->lo_queue)
 			goto out_mem4;
 		init_MUTEX(&lo->lo_ctl_mutex);
-		init_MUTEX_LOCKED(&lo->lo_sem);
-		init_MUTEX_LOCKED(&lo->lo_bh_mutex);
+		init_completion(&lo->lo_done);
+		init_completion(&lo->lo_bh_done);
 		lo->lo_number = i;
 		spin_lock_init(&lo->lo_lock);
 		disk->major = LOOP_MAJOR;
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@ -27,8 +27,8 @@
 #include <linux/time.h>
 #include <linux/hdreg.h>
 #include <linux/dma-mapping.h>
+#include <linux/completion.h>
 #include <asm/io.h>
-#include <asm/semaphore.h>
 #include <asm/uaccess.h>

 #if 0
@ -303,7 +303,7 @@ struct carm_host {

 	struct work_struct		fsm_task;

-	struct semaphore		probe_sem;
+	struct completion		probe_comp;
 };

 struct carm_response {
@ -1346,7 +1346,7 @@ static void carm_fsm_task (void *_data)
 	}

 	case HST_PROBE_FINISHED:
-		up(&host->probe_sem);
+		complete(&host->probe_comp);
 		break;

 	case HST_ERROR:
@ -1622,7 +1622,7 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	host->flags = pci_dac ? FL_DAC : 0;
 	spin_lock_init(&host->lock);
 	INIT_WORK(&host->fsm_task, carm_fsm_task, host);
-	init_MUTEX_LOCKED(&host->probe_sem);
+	init_completion(&host->probe_comp);

 	for (i = 0; i < ARRAY_SIZE(host->req); i++)
 		host->req[i].tag = i;
@ -1691,8 +1691,8 @@ static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (rc)
 		goto err_out_free_irq;

-	DPRINTK("waiting for probe_sem\n");
-	down(&host->probe_sem);
+	DPRINTK("waiting for probe_comp\n");
+	wait_for_completion(&host->probe_comp);

 	printk(KERN_INFO "%s: pci %s, ports %d, io %lx, irq %u, major %d\n",
 	       host->name, pci_name(pdev), (int) CARM_MAX_PORTS,
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@ -741,7 +741,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
 {
 	loff_t ret;

-	down(&file->f_dentry->d_inode->i_sem);
+	mutex_lock(&file->f_dentry->d_inode->i_mutex);
 	switch (orig) {
 		case 0:
 			file->f_pos = offset;
@ -756,7 +756,7 @@ static loff_t memory_lseek(struct file * file, loff_t offset, int orig)
 		default:
 			ret = -EINVAL;
 	}
-	up(&file->f_dentry->d_inode->i_sem);
+	mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 	return ret;
 }

--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@ -153,6 +153,21 @@ static struct sysrq_key_op sysrq_mountro_op = {

 /* END SYNC SYSRQ HANDLERS BLOCK */

+#ifdef CONFIG_DEBUG_MUTEXES
+
+static void
+sysrq_handle_showlocks(int key, struct pt_regs *pt_regs, struct tty_struct *tty)
+{
+	mutex_debug_show_all_locks();
+}
+
+static struct sysrq_key_op sysrq_showlocks_op = {
+	.handler	= sysrq_handle_showlocks,
+	.help_msg	= "show-all-locks(D)",
+	.action_msg	= "Show Locks Held",
+};
+
+#endif

 /* SHOW SYSRQ HANDLERS BLOCK */

@ -294,7 +309,11 @@ static struct sysrq_key_op *sysrq_key_table[SYSRQ_KEY_TABLE_LENGTH] = {
 #else
 /* c */	NULL,
 #endif
+#ifdef CONFIG_DEBUG_MUTEXES
+/* d */ &sysrq_showlocks_op,
+#else
 /* d */ NULL,
+#endif
 /* e */	&sysrq_term_op,
 /* f */	&sysrq_moom_op,
 /* g */	NULL,
--- a/drivers/char/watchdog/cpu5wdt.c
+++ b/drivers/char/watchdog/cpu5wdt.c
@ -28,6 +28,7 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/timer.h>
+#include <linux/completion.h>
 #include <linux/jiffies.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
@ -57,7 +58,7 @@ static int ticks = 10000;
 /* some device data */

 static struct {
-	struct semaphore stop;
+	struct completion stop;
 	volatile int running;
 	struct timer_list timer;
 	volatile int queue;
@ -85,7 +86,7 @@ static void cpu5wdt_trigger(unsigned long unused)
 	}
 	else {
 		/* ticks doesn't matter anyway */
-		up(&cpu5wdt_device.stop);
+		complete(&cpu5wdt_device.stop);
 	}

 }
@ -239,7 +240,7 @@ static int __devinit cpu5wdt_init(void)
 	if ( !val )
 		printk(KERN_INFO PFX "sorry, was my fault\n");

-	init_MUTEX_LOCKED(&cpu5wdt_device.stop);
+	init_completion(&cpu5wdt_device.stop);
 	cpu5wdt_device.queue = 0;

 	clear_bit(0, &cpu5wdt_device.inuse);
@ -269,7 +270,7 @@ static void __devexit cpu5wdt_exit(void)
 {
 	if ( cpu5wdt_device.queue ) {
 		cpu5wdt_device.queue = 0;
-		down(&cpu5wdt_device.stop);
+		wait_for_completion(&cpu5wdt_device.stop);
 	}

 	misc_deregister(&cpu5wdt_misc);
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@ -655,7 +655,7 @@ static void hwif_release_dev (struct device *dev)
 {
 	ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);

-	up(&hwif->gendev_rel_sem);
+	complete(&hwif->gendev_rel_comp);
 }

 static void hwif_register (ide_hwif_t *hwif)
@ -1327,7 +1327,7 @@ static void drive_release_dev (struct device *dev)
 	drive->queue = NULL;
 	spin_unlock_irq(&ide_lock);

-	up(&drive->gendev_rel_sem);
+	complete(&drive->gendev_rel_comp);
 }

 /*
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@ -222,7 +222,7 @@ static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 	hwif->mwdma_mask = 0x80;	/* disable all mwdma */
 	hwif->swdma_mask = 0x80;	/* disable all swdma */

-	sema_init(&hwif->gendev_rel_sem, 0);
+	init_completion(&hwif->gendev_rel_comp);

 	default_hwif_iops(hwif);
 	default_hwif_transport(hwif);
@ -245,7 +245,7 @@ static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
 		drive->is_flash			= 0;
 		drive->vdma			= 0;
 		INIT_LIST_HEAD(&drive->list);
-		sema_init(&drive->gendev_rel_sem, 0);
+		init_completion(&drive->gendev_rel_comp);
 	}
 }

@ -602,7 +602,7 @@ void ide_unregister(unsigned int index)
 		}
 		spin_unlock_irq(&ide_lock);
 		device_unregister(&drive->gendev);
-		down(&drive->gendev_rel_sem);
+		wait_for_completion(&drive->gendev_rel_comp);
 		spin_lock_irq(&ide_lock);
 	}
 	hwif->present = 0;
@ -662,7 +662,7 @@ void ide_unregister(unsigned int index)
 	/* More messed up locking ... */
 	spin_unlock_irq(&ide_lock);
 	device_unregister(&hwif->gendev);
-	down(&hwif->gendev_rel_sem);
+	wait_for_completion(&hwif->gendev_rel_comp);

 	/*
 	 * Remove us from the kernel's knowledge
--- a/drivers/isdn/capi/capifs.c
+++ b/drivers/isdn/capi/capifs.c
@ -138,7 +138,7 @@ static struct dentry *get_node(int num)
 {
 	char s[10];
 	struct dentry *root = capifs_root;
-	down(&root->d_inode->i_sem);
+	mutex_lock(&root->d_inode->i_mutex);
 	return lookup_one_len(s, root, sprintf(s, "%d", num));
 }

@ -159,7 +159,7 @@ void capifs_new_ncci(unsigned int number, dev_t device)
 	dentry = get_node(number);
 	if (!IS_ERR(dentry) && !dentry->d_inode)
 		d_instantiate(dentry, inode);
-	up(&capifs_root->d_inode->i_sem);
+	mutex_unlock(&capifs_root->d_inode->i_mutex);
 }

 void capifs_free_ncci(unsigned int number)
@ -175,7 +175,7 @@ void capifs_free_ncci(unsigned int number)
 		}
 		dput(dentry);
 	}
-	up(&capifs_root->d_inode->i_sem);
+	mutex_unlock(&capifs_root->d_inode->i_mutex);
 }

 static int __init capifs_init(void)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@ -837,9 +837,9 @@ static void __set_size(struct mapped_device *md, sector_t size)
 {
 	set_capacity(md->disk, size);

-	down(&md->suspended_bdev->bd_inode->i_sem);
+	mutex_lock(&md->suspended_bdev->bd_inode->i_mutex);
 	i_size_write(md->suspended_bdev->bd_inode, (loff_t)size << SECTOR_SHIFT);
-	up(&md->suspended_bdev->bd_inode->i_sem);
+	mutex_unlock(&md->suspended_bdev->bd_inode->i_mutex);
 }

 static int __bind(struct mapped_device *md, struct dm_table *t)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@ -3460,9 +3460,9 @@ static int update_size(mddev_t *mddev, unsigned long size)

 		bdev = bdget_disk(mddev->gendisk, 0);
 		if (bdev) {
-			down(&bdev->bd_inode->i_sem);
+			mutex_lock(&bdev->bd_inode->i_mutex);
 			i_size_write(bdev->bd_inode, mddev->array_size << 10);
-			up(&bdev->bd_inode->i_sem);
+			mutex_unlock(&bdev->bd_inode->i_mutex);
 			bdput(bdev);
 		}
 	}
@ -3486,9 +3486,9 @@ static int update_raid_disks(mddev_t *mddev, int raid_disks)

 		bdev = bdget_disk(mddev->gendisk, 0);
 		if (bdev) {
-			down(&bdev->bd_inode->i_sem);
+			mutex_lock(&bdev->bd_inode->i_mutex);
 			i_size_write(bdev->bd_inode, mddev->array_size << 10);
-			up(&bdev->bd_inode->i_sem);
+			mutex_unlock(&bdev->bd_inode->i_mutex);
 			bdput(bdev);
 		}
 	}
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@ -25,7 +25,7 @@ proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
 	loff_t new = -1;
 	struct inode *inode = file->f_dentry->d_inode;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	switch (whence) {
 	case 0:
 		new = off;
@ -41,7 +41,7 @@ proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
 		new = -EINVAL;
 	else
 		file->f_pos = new;
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return new;
 }

--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@ -184,13 +184,13 @@ static void update_bus(struct dentry *bus)
 	bus->d_inode->i_gid = busgid;
 	bus->d_inode->i_mode = S_IFDIR | busmode;

-	down(&bus->d_inode->i_sem);
+	mutex_lock(&bus->d_inode->i_mutex);

 	list_for_each_entry(dev, &bus->d_subdirs, d_u.d_child)
 		if (dev->d_inode)
 			update_dev(dev);

-	up(&bus->d_inode->i_sem);
+	mutex_unlock(&bus->d_inode->i_mutex);
 }

 static void update_sb(struct super_block *sb)
@ -201,7 +201,7 @@ static void update_sb(struct super_block *sb)
 	if (!root)
 		return;

-	down(&root->d_inode->i_sem);
+	mutex_lock(&root->d_inode->i_mutex);

 	list_for_each_entry(bus, &root->d_subdirs, d_u.d_child) {
 		if (bus->d_inode) {
@ -219,7 +219,7 @@ static void update_sb(struct super_block *sb)
 		}
 	}

-	up(&root->d_inode->i_sem);
+	mutex_unlock(&root->d_inode->i_mutex);
 }

 static int remount(struct super_block *sb, int *flags, char *data)
@ -333,10 +333,10 @@ static int usbfs_empty (struct dentry *dentry)
 static int usbfs_unlink (struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	dentry->d_inode->i_nlink--;
 	dput(dentry);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	d_delete(dentry);
 	return 0;
 }
@ -346,7 +346,7 @@ static int usbfs_rmdir(struct inode *dir, struct dentry *dentry)
 	int error = -ENOTEMPTY;
 	struct inode * inode = dentry->d_inode;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	dentry_unhash(dentry);
 	if (usbfs_empty(dentry)) {
 		dentry->d_inode->i_nlink -= 2;
@ -355,7 +355,7 @@ static int usbfs_rmdir(struct inode *dir, struct dentry *dentry)
 		dir->i_nlink--;
 		error = 0;
 	}
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	if (!error)
 		d_delete(dentry);
 	dput(dentry);
@ -380,7 +380,7 @@ static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
 {
 	loff_t retval = -EINVAL;

-	down(&file->f_dentry->d_inode->i_sem);
+	mutex_lock(&file->f_dentry->d_inode->i_mutex);
 	switch(orig) {
 	case 0:
 		if (offset > 0) {
@ -397,7 +397,7 @@ static loff_t default_file_lseek (struct file *file, loff_t offset, int orig)
 	default:
 		break;
 	}
-	up(&file->f_dentry->d_inode->i_sem);
+	mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 	return retval;
 }

@ -480,7 +480,7 @@ static int fs_create_by_name (const char *name, mode_t mode,
 	}

 	*dentry = NULL;
-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	*dentry = lookup_one_len(name, parent, strlen(name));
 	if (!IS_ERR(dentry)) {
 		if ((mode & S_IFMT) == S_IFDIR)
@ -489,7 +489,7 @@ static int fs_create_by_name (const char *name, mode_t mode,
 			error = usbfs_create (parent->d_inode, *dentry, mode);
 	} else
 		error = PTR_ERR(dentry);
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);

 	return error;
 }
@ -528,7 +528,7 @@ static void fs_remove_file (struct dentry *dentry)
 	if (!parent || !parent->d_inode)
 		return;

-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	if (usbfs_positive(dentry)) {
 		if (dentry->d_inode) {
 			if (S_ISDIR(dentry->d_inode->i_mode))
@ -538,7 +538,7 @@ static void fs_remove_file (struct dentry *dentry)
 		dput(dentry);
 		}
 	}
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 }

 /* --------------------------------------------------------------------- */
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@ -1891,7 +1891,7 @@ static int fsync_sub(struct lun *curlun)
 		return -EINVAL;

 	inode = filp->f_dentry->d_inode;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	current->flags |= PF_SYNCWRITE;
 	rc = filemap_fdatawrite(inode->i_mapping);
 	err = filp->f_op->fsync(filp, filp->f_dentry, 1);
@ -1901,7 +1901,7 @@ static int fsync_sub(struct lun *curlun)
 	if (!rc)
 		rc = err;
 	current->flags &= ~PF_SYNCWRITE;
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	VLDBG(curlun, "fdatasync -> %d\n", rc);
 	return rc;
 }
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@ -1562,10 +1562,10 @@ static void destroy_ep_files (struct dev_data *dev)
 		spin_unlock_irq (&dev->lock);

 		/* break link to dcache */
-		down (&parent->i_sem);
+		mutex_lock (&parent->i_mutex);
 		d_delete (dentry);
 		dput (dentry);
-		up (&parent->i_sem);
+		mutex_unlock (&parent->i_mutex);

 		/* fds may still be open */
 		goto restart;
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@ -244,10 +244,10 @@ affs_put_inode(struct inode *inode)
 	pr_debug("AFFS: put_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
 	affs_free_prealloc(inode);
 	if (atomic_read(&inode->i_count) == 1) {
-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);
 		if (inode->i_size != AFFS_I(inode)->mmu_private)
 			affs_truncate(inode);
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 	}
 }

--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@ -229,9 +229,9 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr
 	dentry->d_flags |= DCACHE_AUTOFS_PENDING;
 	d_add(dentry, NULL);

-	up(&dir->i_sem);
+	mutex_unlock(&dir->i_mutex);
 	autofs_revalidate(dentry, nd);
-	down(&dir->i_sem);
+	mutex_lock(&dir->i_mutex);

 	/*
 	 * If we are still pending, check if we had to handle
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@ -489,9 +489,9 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s
 	d_add(dentry, NULL);

 	if (dentry->d_op && dentry->d_op->d_revalidate) {
-		up(&dir->i_sem);
+		mutex_unlock(&dir->i_mutex);
 		(dentry->d_op->d_revalidate)(dentry, nd);
-		down(&dir->i_sem);
+		mutex_lock(&dir->i_mutex);
 	}

 	/*
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@ -588,11 +588,11 @@ static ssize_t bm_entry_write(struct file *file, const char __user *buffer,
 		case 2: set_bit(Enabled, &e->flags);
 			break;
 		case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
-			down(&root->d_inode->i_sem);
+			mutex_lock(&root->d_inode->i_mutex);

 			kill_node(e);

-			up(&root->d_inode->i_sem);
+			mutex_unlock(&root->d_inode->i_mutex);
 			dput(root);
 			break;
 		default: return res;
@ -622,7 +622,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
 		return PTR_ERR(e);

 	root = dget(sb->s_root);
-	down(&root->d_inode->i_sem);
+	mutex_lock(&root->d_inode->i_mutex);
 	dentry = lookup_one_len(e->name, root, strlen(e->name));
 	err = PTR_ERR(dentry);
 	if (IS_ERR(dentry))
@ -658,7 +658,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer,
 out2:
 	dput(dentry);
 out:
-	up(&root->d_inode->i_sem);
+	mutex_unlock(&root->d_inode->i_mutex);
 	dput(root);

 	if (err) {
@ -703,12 +703,12 @@ static ssize_t bm_status_write(struct file * file, const char __user * buffer,
 		case 1: enabled = 0; break;
 		case 2: enabled = 1; break;
 		case 3: root = dget(file->f_vfsmnt->mnt_sb->s_root);
-			down(&root->d_inode->i_sem);
+			mutex_lock(&root->d_inode->i_mutex);

 			while (!list_empty(&entries))
 				kill_node(list_entry(entries.next, Node, list));

-			up(&root->d_inode->i_sem);
+			mutex_unlock(&root->d_inode->i_mutex);
 			dput(root);
 		default: return res;
 	}
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@ -202,7 +202,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
 	loff_t size;
 	loff_t retval;

-	down(&bd_inode->i_sem);
+	mutex_lock(&bd_inode->i_mutex);
 	size = i_size_read(bd_inode);

 	switch (origin) {
@ -219,7 +219,7 @@ static loff_t block_llseek(struct file *file, loff_t offset, int origin)
 		}
 		retval = offset;
 	}
-	up(&bd_inode->i_sem);
+	mutex_unlock(&bd_inode->i_mutex);
 	return retval;
 }
 	
--- a/fs/buffer.c
+++ b/fs/buffer.c
@ -352,11 +352,11 @@ static long do_fsync(unsigned int fd, int datasync)
 	 * We need to protect against concurrent writers,
 	 * which could cause livelocks in fsync_buffers_list
 	 */
-	down(&mapping->host->i_sem);
+	mutex_lock(&mapping->host->i_mutex);
 	err = file->f_op->fsync(file, file->f_dentry, datasync);
 	if (!ret)
 		ret = err;
-	up(&mapping->host->i_sem);
+	mutex_unlock(&mapping->host->i_mutex);
 	err = filemap_fdatawait(mapping);
 	if (!ret)
 		ret = err;
@ -2338,7 +2338,7 @@ int generic_commit_write(struct file *file, struct page *page,
 	__block_commit_write(inode,page,from,to);
 	/*
 	 * No need to use i_size_read() here, the i_size
-	 * cannot change under us because we hold i_sem.
+	 * cannot change under us because we hold i_mutex.
 	 */
 	if (pos > inode->i_size) {
 		i_size_write(inode, pos);
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@ -860,9 +860,9 @@ static int cifs_oplock_thread(void * dummyarg)
 				DeleteOplockQEntry(oplock_item);
 				/* can not grab inode sem here since it would
 				deadlock when oplock received on delete 
-				since vfs_unlink holds the i_sem across
+				since vfs_unlink holds the i_mutex across
 				the call */
-				/* down(&inode->i_sem);*/
+				/* mutex_lock(&inode->i_mutex);*/
 				if (S_ISREG(inode->i_mode)) {
 					rc = filemap_fdatawrite(inode->i_mapping);
 					if(CIFS_I(inode)->clientCanCacheRead == 0) {
@ -871,7 +871,7 @@ static int cifs_oplock_thread(void * dummyarg)
 					}
 				} else
 					rc = 0;
-				/* up(&inode->i_sem);*/
+				/* mutex_unlock(&inode->i_mutex);*/
 				if (rc)
 					CIFS_I(inode)->write_behind_rc = rc;
 				cFYI(1,("Oplock flush inode %p rc %d",inode,rc));
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@ -1040,9 +1040,9 @@ int cifs_revalidate(struct dentry *direntry)
 	}

 	/* can not grab this sem since kernel filesys locking documentation
-	   indicates i_sem may be taken by the kernel on lookup and rename
-	   which could deadlock if we grab the i_sem here as well */
-/*	down(&direntry->d_inode->i_sem);*/
+	   indicates i_mutex may be taken by the kernel on lookup and rename
+	   which could deadlock if we grab the i_mutex here as well */
+/*	mutex_lock(&direntry->d_inode->i_mutex);*/
 	/* need to write out dirty pages here  */
 	if (direntry->d_inode->i_mapping) {
 		/* do we need to lock inode until after invalidate completes
@ -1066,7 +1066,7 @@ int cifs_revalidate(struct dentry *direntry)
 			}
 		}
 	}
-/*	up(&direntry->d_inode->i_sem); */
+/*	mutex_unlock(&direntry->d_inode->i_mutex); */
 	
 	kfree(full_path);
 	FreeXid(xid);
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@ -453,7 +453,7 @@ int coda_readdir(struct file *coda_file, void *dirent, filldir_t filldir)
 	coda_vfs_stat.readdir++;

 	host_inode = host_file->f_dentry->d_inode;
-	down(&host_inode->i_sem);
+	mutex_lock(&host_inode->i_mutex);
 	host_file->f_pos = coda_file->f_pos;

 	if (!host_file->f_op->readdir) {
@ -475,7 +475,7 @@ int coda_readdir(struct file *coda_file, void *dirent, filldir_t filldir)
 	}
 out:
 	coda_file->f_pos = host_file->f_pos;
-	up(&host_inode->i_sem);
+	mutex_unlock(&host_inode->i_mutex);

 	return ret;
 }
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@ -77,14 +77,14 @@ coda_file_write(struct file *coda_file, const char __user *buf, size_t count, lo
 		return -EINVAL;

 	host_inode = host_file->f_dentry->d_inode;
-	down(&coda_inode->i_sem);
+	mutex_lock(&coda_inode->i_mutex);

 	ret = host_file->f_op->write(host_file, buf, count, ppos);

 	coda_inode->i_size = host_inode->i_size;
 	coda_inode->i_blocks = (coda_inode->i_size + 511) >> 9;
 	coda_inode->i_mtime = coda_inode->i_ctime = CURRENT_TIME_SEC;
-	up(&coda_inode->i_sem);
+	mutex_unlock(&coda_inode->i_mutex);

 	return ret;
 }
@ -272,9 +272,9 @@ int coda_fsync(struct file *coda_file, struct dentry *coda_dentry, int datasync)
 	if (host_file->f_op && host_file->f_op->fsync) {
 		host_dentry = host_file->f_dentry;
 		host_inode = host_dentry->d_inode;
-		down(&host_inode->i_sem);
+		mutex_lock(&host_inode->i_mutex);
 		err = host_file->f_op->fsync(host_file, host_dentry, datasync);
-		up(&host_inode->i_sem);
+		mutex_unlock(&host_inode->i_mutex);
 	}

 	if ( !err && !datasync ) {
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@ -288,10 +288,10 @@ static struct dentry * configfs_lookup(struct inode *dir,

 /*
 * Only subdirectories count here.  Files (CONFIGFS_NOT_PINNED) are
- * attributes and are removed by rmdir().  We recurse, taking i_sem
+ * attributes and are removed by rmdir().  We recurse, taking i_mutex
 * on all children that are candidates for default detach.  If the
 * result is clean, then configfs_detach_group() will handle dropping
- * i_sem.  If there is an error, the caller will clean up the i_sem
+ * i_mutex.  If there is an error, the caller will clean up the i_mutex
 * holders via configfs_detach_rollback().
 */
 static int configfs_detach_prep(struct dentry *dentry)
@ -309,8 +309,8 @@ static int configfs_detach_prep(struct dentry *dentry)
 		if (sd->s_type & CONFIGFS_NOT_PINNED)
 			continue;
 		if (sd->s_type & CONFIGFS_USET_DEFAULT) {
-			down(&sd->s_dentry->d_inode->i_sem);
-			/* Mark that we've taken i_sem */
+			mutex_lock(&sd->s_dentry->d_inode->i_mutex);
+			/* Mark that we've taken i_mutex */
 			sd->s_type |= CONFIGFS_USET_DROPPING;

 			ret = configfs_detach_prep(sd->s_dentry);
@ -327,7 +327,7 @@ static int configfs_detach_prep(struct dentry *dentry)
 }

 /*
- * Walk the tree, dropping i_sem wherever CONFIGFS_USET_DROPPING is
+ * Walk the tree, dropping i_mutex wherever CONFIGFS_USET_DROPPING is
 * set.
 */
 static void configfs_detach_rollback(struct dentry *dentry)
@ -341,7 +341,7 @@ static void configfs_detach_rollback(struct dentry *dentry)

 			if (sd->s_type & CONFIGFS_USET_DROPPING) {
 				sd->s_type &= ~CONFIGFS_USET_DROPPING;
-				up(&sd->s_dentry->d_inode->i_sem);
+				mutex_unlock(&sd->s_dentry->d_inode->i_mutex);
 			}
 		}
 	}
@ -424,11 +424,11 @@ static void detach_groups(struct config_group *group)

 		/*
 		 * From rmdir/unregister, a configfs_detach_prep() pass
-		 * has taken our i_sem for us.  Drop it.
+		 * has taken our i_mutex for us.  Drop it.
 		 * From mkdir/register cleanup, there is no sem held.
 		 */
 		if (sd->s_type & CONFIGFS_USET_DROPPING)
-			up(&child->d_inode->i_sem);
+			mutex_unlock(&child->d_inode->i_mutex);

 		d_delete(child);
 		dput(child);
@ -493,11 +493,11 @@ static int populate_groups(struct config_group *group)
 		/* FYI, we're faking mkdir here
 		 * I'm not sure we need this semaphore, as we're called
 		 * from our parent's mkdir.  That holds our parent's
-		 * i_sem, so afaik lookup cannot continue through our
+		 * i_mutex, so afaik lookup cannot continue through our
 		 * parent to find us, let alone mess with our tree.
-		 * That said, taking our i_sem is closer to mkdir
+		 * That said, taking our i_mutex is closer to mkdir
 		 * emulation, and shouldn't hurt. */
-		down(&dentry->d_inode->i_sem);
+		mutex_lock(&dentry->d_inode->i_mutex);

 		for (i = 0; group->default_groups[i]; i++) {
 			new_group = group->default_groups[i];
@ -507,7 +507,7 @@ static int populate_groups(struct config_group *group)
 				break;
 		}

-		up(&dentry->d_inode->i_sem);
+		mutex_unlock(&dentry->d_inode->i_mutex);
 	}

 	if (ret)
@ -856,7 +856,7 @@ int configfs_rename_dir(struct config_item * item, const char *new_name)
 	down_write(&configfs_rename_sem);
 	parent = item->parent->dentry;

-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);

 	new_dentry = lookup_one_len(new_name, parent, strlen(new_name));
 	if (!IS_ERR(new_dentry)) {
@ -872,7 +872,7 @@ int configfs_rename_dir(struct config_item * item, const char *new_name)
 			error = -EEXIST;
 		dput(new_dentry);
 	}
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 	up_write(&configfs_rename_sem);

 	return error;
@ -884,9 +884,9 @@ static int configfs_dir_open(struct inode *inode, struct file *file)
 	struct dentry * dentry = file->f_dentry;
 	struct configfs_dirent * parent_sd = dentry->d_fsdata;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	file->private_data = configfs_new_dirent(parent_sd, NULL);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	return file->private_data ? 0 : -ENOMEM;

@ -897,9 +897,9 @@ static int configfs_dir_close(struct inode *inode, struct file *file)
 	struct dentry * dentry = file->f_dentry;
 	struct configfs_dirent * cursor = file->private_data;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	list_del_init(&cursor->s_sibling);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	release_configfs_dirent(cursor);

@ -975,7 +975,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
 {
 	struct dentry * dentry = file->f_dentry;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += file->f_pos;
@ -983,7 +983,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
 			if (offset >= 0)
 				break;
 		default:
-			up(&file->f_dentry->d_inode->i_sem);
+			mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {
@ -1007,7 +1007,7 @@ static loff_t configfs_dir_lseek(struct file * file, loff_t offset, int origin)
 			list_add_tail(&cursor->s_sibling, p);
 		}
 	}
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 	return offset;
 }

@ -1037,7 +1037,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
 	sd = configfs_sb->s_root->d_fsdata;
 	link_group(to_config_group(sd->s_element), group);

-	down(&configfs_sb->s_root->d_inode->i_sem);
+	mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);

 	name.name = group->cg_item.ci_name;
 	name.len = strlen(name.name);
@ -1057,7 +1057,7 @@ int configfs_register_subsystem(struct configfs_subsystem *subsys)
 	else
 		d_delete(dentry);

-	up(&configfs_sb->s_root->d_inode->i_sem);
+	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);

 	if (dentry) {
 	    dput(dentry);
@ -1079,18 +1079,18 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
 		return;
 	}

-	down(&configfs_sb->s_root->d_inode->i_sem);
-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	if (configfs_detach_prep(dentry)) {
 		printk(KERN_ERR "configfs: Tried to unregister non-empty subsystem!\n");
 	}
 	configfs_detach_group(&group->cg_item);
 	dentry->d_inode->i_flags |= S_DEAD;
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	d_delete(dentry);

-	up(&configfs_sb->s_root->d_inode->i_sem);
+	mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);

 	dput(dentry);

--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@ -336,9 +336,9 @@ int configfs_add_file(struct dentry * dir, const struct configfs_attribute * att
 	umode_t mode = (attr->ca_mode & S_IALLUGO) | S_IFREG;
 	int error = 0;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	error = configfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);

 	return error;
 }
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@ -122,7 +122,7 @@ const unsigned char * configfs_get_name(struct configfs_dirent *sd)

 /*
 * Unhashes the dentry corresponding to given configfs_dirent
- * Called with parent inode's i_sem held.
+ * Called with parent inode's i_mutex held.
 */
 void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent)
 {
@ -145,7 +145,7 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
 	struct configfs_dirent * sd;
 	struct configfs_dirent * parent_sd = dir->d_fsdata;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
 		if (!sd->s_element)
 			continue;
@ -156,7 +156,7 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
 			break;
 		}
 	}
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);
 }


--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@ -146,7 +146,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
 	}

 	*dentry = NULL;
-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	*dentry = lookup_one_len(name, parent, strlen(name));
 	if (!IS_ERR(dentry)) {
 		if ((mode & S_IFMT) == S_IFDIR)
@ -155,7 +155,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
 			error = debugfs_create(parent->d_inode, *dentry, mode);
 	} else
 		error = PTR_ERR(dentry);
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);

 	return error;
 }
@ -273,7 +273,7 @@ void debugfs_remove(struct dentry *dentry)
 	if (!parent || !parent->d_inode)
 		return;

-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	if (debugfs_positive(dentry)) {
 		if (dentry->d_inode) {
 			if (S_ISDIR(dentry->d_inode->i_mode))
@ -283,7 +283,7 @@ void debugfs_remove(struct dentry *dentry)
 		dput(dentry);
 		}
 	}
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 	simple_release_fs(&debugfs_mount, &debugfs_mount_count);
 }
 EXPORT_SYMBOL_GPL(debugfs_remove);
--- a/fs/devfs/base.c
+++ b/fs/devfs/base.c
@ -2162,27 +2162,27 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
 	 *
 	 * make sure that
 	 *   d_instantiate always runs under lock
-	 *   we release i_sem lock before going to sleep
+	 *   we release i_mutex lock before going to sleep
 	 *
 	 * unfortunately sometimes d_revalidate is called with
-	 * and sometimes without i_sem lock held. The following checks
+	 * and sometimes without i_mutex lock held. The following checks
 	 * attempt to deduce when we need to add (and drop resp.) lock
 	 * here. This relies on current (2.6.2) calling coventions:
 	 *
-	 *   lookup_hash is always run under i_sem and is passing NULL
+	 *   lookup_hash is always run under i_mutex and is passing NULL
 	 *   as nd
 	 *
-	 *   open(...,O_CREATE,...) calls _lookup_hash under i_sem
+	 *   open(...,O_CREATE,...) calls _lookup_hash under i_mutex
 	 *   and sets flags to LOOKUP_OPEN|LOOKUP_CREATE
 	 *
 	 *   all other invocations of ->d_revalidate seem to happen
-	 *   outside of i_sem
+	 *   outside of i_mutex
 	 */
 	need_lock = nd &&
 	    (!(nd->flags & LOOKUP_CREATE) || (nd->flags & LOOKUP_PARENT));

 	if (need_lock)
-		down(&dir->i_sem);
+		mutex_lock(&dir->i_mutex);

 	if (is_devfsd_or_child(fs_info)) {
 		devfs_handle_t de = lookup_info->de;
@ -2221,9 +2221,9 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
 		add_wait_queue(&lookup_info->wait_queue, &wait);
 		read_unlock(&parent->u.dir.lock);
 		/* at this point it is always (hopefully) locked */
-		up(&dir->i_sem);
+		mutex_unlock(&dir->i_mutex);
 		schedule();
-		down(&dir->i_sem);
+		mutex_lock(&dir->i_mutex);
 		/*
 		 * This does not need nor should remove wait from wait_queue.
 		 * Wait queue head is never reused - nothing is ever added to it
@ -2238,7 +2238,7 @@ static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)

      out:
 	if (need_lock)
-		up(&dir->i_sem);
+		mutex_unlock(&dir->i_mutex);
 	return 1;
 }				/*  End Function devfs_d_revalidate_wait  */

@ -2284,9 +2284,9 @@ static struct dentry *devfs_lookup(struct inode *dir, struct dentry *dentry,
 	/*  Unlock directory semaphore, which will release any waiters. They
 	   will get the hashed dentry, and may be forced to wait for
 	   revalidation  */
-	up(&dir->i_sem);
+	mutex_unlock(&dir->i_mutex);
 	wait_for_devfsd_finished(fs_info);	/*  If I'm not devfsd, must wait  */
-	down(&dir->i_sem);	/*  Grab it again because them's the rules  */
+	mutex_lock(&dir->i_mutex);	/*  Grab it again because them's the rules  */
 	de = lookup_info.de;
 	/*  If someone else has been so kind as to make the inode, we go home
 	   early  */
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@ -130,7 +130,7 @@ static struct dentry *get_node(int num)
 {
 	char s[12];
 	struct dentry *root = devpts_root;
-	down(&root->d_inode->i_sem);
+	mutex_lock(&root->d_inode->i_mutex);
 	return lookup_one_len(s, root, sprintf(s, "%d", num));
 }

@ -161,7 +161,7 @@ int devpts_pty_new(struct tty_struct *tty)
 	if (!IS_ERR(dentry) && !dentry->d_inode)
 		d_instantiate(dentry, inode);

-	up(&devpts_root->d_inode->i_sem);
+	mutex_unlock(&devpts_root->d_inode->i_mutex);

 	return 0;
 }
@ -178,7 +178,7 @@ struct tty_struct *devpts_get_tty(int number)
 		dput(dentry);
 	}

-	up(&devpts_root->d_inode->i_sem);
+	mutex_unlock(&devpts_root->d_inode->i_mutex);

 	return tty;
 }
@ -196,7 +196,7 @@ void devpts_pty_kill(int number)
 		}
 		dput(dentry);
 	}
-	up(&devpts_root->d_inode->i_sem);
+	mutex_unlock(&devpts_root->d_inode->i_mutex);
 }

 static int __init init_devpts_fs(void)
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@ -56,7 +56,7 @@
 * lock_type is DIO_LOCKING for regular files on direct-IO-naive filesystems.
 * This determines whether we need to do the fancy locking which prevents
 * direct-IO from being able to read uninitialised disk blocks.  If its zero
- * (blockdev) this locking is not done, and if it is DIO_OWN_LOCKING i_sem is
+ * (blockdev) this locking is not done, and if it is DIO_OWN_LOCKING i_mutex is
 * not held for the entire direct write (taken briefly, initially, during a
 * direct read though, but its never held for the duration of a direct-IO).
 */
@ -930,7 +930,7 @@ static int do_direct_IO(struct dio *dio)
 }

 /*
- * Releases both i_sem and i_alloc_sem
+ * Releases both i_mutex and i_alloc_sem
 */
 static ssize_t
 direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode, 
@ -1062,11 +1062,11 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,

 	/*
 	 * All block lookups have been performed. For READ requests
-	 * we can let i_sem go now that its achieved its purpose
+	 * we can let i_mutex go now that its achieved its purpose
 	 * of protecting us from looking up uninitialized blocks.
 	 */
 	if ((rw == READ) && (dio->lock_type == DIO_LOCKING))
-		up(&dio->inode->i_sem);
+		mutex_unlock(&dio->inode->i_mutex);

 	/*
 	 * OK, all BIOs are submitted, so we can decrement bio_count to truly
@ -1145,18 +1145,18 @@ direct_io_worker(int rw, struct kiocb *iocb, struct inode *inode,
 * The locking rules are governed by the dio_lock_type parameter.
 *
 * DIO_NO_LOCKING (no locking, for raw block device access)
- * For writes, i_sem is not held on entry; it is never taken.
+ * For writes, i_mutex is not held on entry; it is never taken.
 *
 * DIO_LOCKING (simple locking for regular files)
- * For writes we are called under i_sem and return with i_sem held, even though
+ * For writes we are called under i_mutex and return with i_mutex held, even though
 * it is internally dropped.
- * For reads, i_sem is not held on entry, but it is taken and dropped before
+ * For reads, i_mutex is not held on entry, but it is taken and dropped before
 * returning.
 *
 * DIO_OWN_LOCKING (filesystem provides synchronisation and handling of
 *	uninitialised data, allowing parallel direct readers and writers)
- * For writes we are called without i_sem, return without it, never touch it.
- * For reads, i_sem is held on entry and will be released before returning.
+ * For writes we are called without i_mutex, return without it, never touch it.
+ * For reads, i_mutex is held on entry and will be released before returning.
 *
 * Additional i_alloc_sem locking requirements described inline below.
 */
@ -1214,11 +1214,11 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	 * For block device access DIO_NO_LOCKING is used,
 	 *	neither readers nor writers do any locking at all
 	 * For regular files using DIO_LOCKING,
-	 *	readers need to grab i_sem and i_alloc_sem
-	 *	writers need to grab i_alloc_sem only (i_sem is already held)
+	 *	readers need to grab i_mutex and i_alloc_sem
+	 *	writers need to grab i_alloc_sem only (i_mutex is already held)
 	 * For regular files using DIO_OWN_LOCKING,
 	 *	neither readers nor writers take any locks here
-	 *	(i_sem is already held and release for writers here)
+	 *	(i_mutex is already held and release for writers here)
 	 */
 	dio->lock_type = dio_lock_type;
 	if (dio_lock_type != DIO_NO_LOCKING) {
@ -1228,7 +1228,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,

 			mapping = iocb->ki_filp->f_mapping;
 			if (dio_lock_type != DIO_OWN_LOCKING) {
-				down(&inode->i_sem);
+				mutex_lock(&inode->i_mutex);
 				reader_with_isem = 1;
 			}

@ -1240,7 +1240,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 			}

 			if (dio_lock_type == DIO_OWN_LOCKING) {
-				up(&inode->i_sem);
+				mutex_unlock(&inode->i_mutex);
 				reader_with_isem = 0;
 			}
 		}
@ -1266,7 +1266,7 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,

 out:
 	if (reader_with_isem)
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 	if (rw & WRITE)
 		current->flags &= ~PF_SYNCWRITE;
 	return retval;
--- a/fs/dquot.c
+++ b/fs/dquot.c
@ -100,7 +100,7 @@
 * operation is just reading pointers from inode (or not using them at all) the
 * read lock is enough. If pointers are altered function must hold write lock
 * (these locking rules also apply for S_NOQUOTA flag in the inode - note that
- * for altering the flag i_sem is also needed).  If operation is holding
+ * for altering the flag i_mutex is also needed).  If operation is holding
 * reference to dquot in other way (e.g. quotactl ops) it must be guarded by
 * dqonoff_sem.
 * This locking assures that:
@ -117,9 +117,9 @@
 * spinlock to internal buffers before writing.
 *
 * Lock ordering (including related VFS locks) is the following:
- *   i_sem > dqonoff_sem > iprune_sem > journal_lock > dqptr_sem >
+ *   i_mutex > dqonoff_sem > iprune_sem > journal_lock > dqptr_sem >
 *   > dquot->dq_lock > dqio_sem
- * i_sem on quota files is special (it's below dqio_sem)
+ * i_mutex on quota files is special (it's below dqio_sem)
 */

 static DEFINE_SPINLOCK(dq_list_lock);
@ -1369,11 +1369,11 @@ int vfs_quota_off(struct super_block *sb, int type)
 			/* If quota was reenabled in the meantime, we have
 			 * nothing to do */
 			if (!sb_has_quota_enabled(sb, cnt)) {
-				down(&toputinode[cnt]->i_sem);
+				mutex_lock(&toputinode[cnt]->i_mutex);
 				toputinode[cnt]->i_flags &= ~(S_IMMUTABLE |
 				  S_NOATIME | S_NOQUOTA);
 				truncate_inode_pages(&toputinode[cnt]->i_data, 0);
-				up(&toputinode[cnt]->i_sem);
+				mutex_unlock(&toputinode[cnt]->i_mutex);
 				mark_inode_dirty(toputinode[cnt]);
 				iput(toputinode[cnt]);
 			}
@ -1417,7 +1417,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
 	write_inode_now(inode, 1);
 	/* And now flush the block cache so that kernel sees the changes */
 	invalidate_bdev(sb->s_bdev, 0);
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	down(&dqopt->dqonoff_sem);
 	if (sb_has_quota_enabled(sb, type)) {
 		error = -EBUSY;
@ -1449,7 +1449,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
 		goto out_file_init;
 	}
 	up(&dqopt->dqio_sem);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	set_enable_flags(dqopt, type);

 	add_dquot_ref(sb, type);
@ -1470,7 +1470,7 @@ static int vfs_quota_on_inode(struct inode *inode, int type, int format_id)
 		inode->i_flags |= oldflags;
 		up_write(&dqopt->dqptr_sem);
 	}
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 out_fmt:
 	put_quota_format(fmt);

--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@ -177,9 +177,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 			struct dentry *ppd;
 			struct dentry *npd;

-			down(&pd->d_inode->i_sem);
+			mutex_lock(&pd->d_inode->i_mutex);
 			ppd = CALL(nops,get_parent)(pd);
-			up(&pd->d_inode->i_sem);
+			mutex_unlock(&pd->d_inode->i_mutex);

 			if (IS_ERR(ppd)) {
 				err = PTR_ERR(ppd);
@ -201,9 +201,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 				break;
 			}
 			dprintk("find_exported_dentry: found name: %s\n", nbuf);
-			down(&ppd->d_inode->i_sem);
+			mutex_lock(&ppd->d_inode->i_mutex);
 			npd = lookup_one_len(nbuf, ppd, strlen(nbuf));
-			up(&ppd->d_inode->i_sem);
+			mutex_unlock(&ppd->d_inode->i_mutex);
 			if (IS_ERR(npd)) {
 				err = PTR_ERR(npd);
 				dprintk("find_exported_dentry: lookup failed: %d\n", err);
@ -242,9 +242,9 @@ find_exported_dentry(struct super_block *sb, void *obj, void *parent,
 		struct dentry *nresult;
 		err = CALL(nops,get_name)(target_dir, nbuf, result);
 		if (!err) {
-			down(&target_dir->d_inode->i_sem);
+			mutex_lock(&target_dir->d_inode->i_mutex);
 			nresult = lookup_one_len(nbuf, target_dir, strlen(nbuf));
-			up(&target_dir->d_inode->i_sem);
+			mutex_unlock(&target_dir->d_inode->i_mutex);
 			if (!IS_ERR(nresult)) {
 				if (nresult->d_inode) {
 					dput(result);
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@ -149,7 +149,7 @@ ext2_iset_acl(struct inode *inode, struct posix_acl **i_acl,
 }

 /*
- * inode->i_sem: don't care
+ * inode->i_mutex: don't care
 */
 static struct posix_acl *
 ext2_get_acl(struct inode *inode, int type)
@ -211,7 +211,7 @@ ext2_get_acl(struct inode *inode, int type)
 }

 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
 */
 static int
 ext2_set_acl(struct inode *inode, int type, struct posix_acl *acl)
@ -301,8 +301,8 @@ ext2_permission(struct inode *inode, int mask, struct nameidata *nd)
 /*
 * Initialize the ACLs of a new inode. Called from ext2_new_inode.
 *
- * dir->i_sem: down
- * inode->i_sem: up (access to inode is still exclusive)
+ * dir->i_mutex: down
+ * inode->i_mutex: up (access to inode is still exclusive)
 */
 int
 ext2_init_acl(struct inode *inode, struct inode *dir)
@ -361,7 +361,7 @@ ext2_init_acl(struct inode *inode, struct inode *dir)
 * for directories) are added. There are no more bits available in the
 * file mode.
 *
- * inode->i_sem: down
+ * inode->i_mutex: down
 */
 int
 ext2_acl_chmod(struct inode *inode)
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@ -53,7 +53,7 @@ struct ext2_inode_info {
 #ifdef CONFIG_EXT2_FS_XATTR
 	/*
 	 * Extended attributes can be read independently of the main file
-	 * data. Taking i_sem even when reading would cause contention
+	 * data. Taking i_mutex even when reading would cause contention
 	 * between readers of EAs and writers of regular file data, so
 	 * instead we synchronize on xattr_sem when reading or changing
 	 * EAs.
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@ -1152,7 +1152,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
 	struct buffer_head tmp_bh;
 	struct buffer_head *bh;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	while (towrite > 0) {
 		tocopy = sb->s_blocksize - offset < towrite ?
 				sb->s_blocksize - offset : towrite;
@ -1189,7 +1189,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type,
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	mark_inode_dirty(inode);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return len - towrite;
 }

--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@ -325,7 +325,7 @@ bad_block:	ext2_error(inode->i_sb, "ext2_xattr_list",
 /*
 * Inode operation listxattr()
 *
- * dentry->d_inode->i_sem: don't care
+ * dentry->d_inode->i_mutex: don't care
 */
 ssize_t
 ext2_listxattr(struct dentry *dentry, char *buffer, size_t size)
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@ -152,7 +152,7 @@ ext3_iset_acl(struct inode *inode, struct posix_acl **i_acl,
 /*
 * Inode operation get_posix_acl().
 *
- * inode->i_sem: don't care
+ * inode->i_mutex: don't care
 */
 static struct posix_acl *
 ext3_get_acl(struct inode *inode, int type)
@ -216,7 +216,7 @@ ext3_get_acl(struct inode *inode, int type)
 /*
 * Set the access or default ACL of an inode.
 *
- * inode->i_sem: down unless called from ext3_new_inode
+ * inode->i_mutex: down unless called from ext3_new_inode
 */
 static int
 ext3_set_acl(handle_t *handle, struct inode *inode, int type,
@ -306,8 +306,8 @@ ext3_permission(struct inode *inode, int mask, struct nameidata *nd)
 /*
 * Initialize the ACLs of a new inode. Called from ext3_new_inode.
 *
- * dir->i_sem: down
- * inode->i_sem: up (access to inode is still exclusive)
+ * dir->i_mutex: down
+ * inode->i_mutex: up (access to inode is still exclusive)
 */
 int
 ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
@ -368,7 +368,7 @@ ext3_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
 * for directories) are added. There are no more bits available in the
 * file mode.
 *
- * inode->i_sem: down
+ * inode->i_mutex: down
 */
 int
 ext3_acl_chmod(struct inode *inode)
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@ -2150,7 +2150,7 @@ int ext3_force_commit(struct super_block *sb)

 static void ext3_write_super (struct super_block * sb)
 {
-	if (down_trylock(&sb->s_lock) == 0)
+	if (mutex_trylock(&sb->s_lock) != 0)
 		BUG();
 	sb->s_dirt = 0;
 }
@ -2601,7 +2601,7 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 	struct buffer_head *bh;
 	handle_t *handle = journal_current_handle();

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	while (towrite > 0) {
 		tocopy = sb->s_blocksize - offset < towrite ?
 				sb->s_blocksize - offset : towrite;
@ -2644,7 +2644,7 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	ext3_mark_inode_dirty(handle, inode);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return len - towrite;
 }

--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@ -140,7 +140,7 @@ ext3_xattr_handler(int name_index)
 /*
 * Inode operation listxattr()
 *
- * dentry->d_inode->i_sem: don't care
+ * dentry->d_inode->i_mutex: don't care
 */
 ssize_t
 ext3_listxattr(struct dentry *dentry, char *buffer, size_t size)
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@ -729,13 +729,13 @@ static int fat_dir_ioctl(struct inode * inode, struct file * filp,

 	buf.dirent = d1;
 	buf.result = 0;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	ret = -ENOENT;
 	if (!IS_DEADDIR(inode)) {
 		ret = __fat_readdir(inode, filp, &buf, fat_ioctl_filldir,
 				    short_only, both);
 	}
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	if (ret >= 0)
 		ret = buf.result;
 	return ret;
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@ -41,7 +41,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
 		if (err)
 			return err;

-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);

 		if (IS_RDONLY(inode)) {
 			err = -EROFS;
@ -103,7 +103,7 @@ int fat_generic_ioctl(struct inode *inode, struct file *filp,
 		MSDOS_I(inode)->i_attrs = attr & ATTR_UNUSED;
 		mark_inode_dirty(inode);
 	up:
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 		return err;
 	}
 	default:
--- a/fs/fifo.c
+++ b/fs/fifo.c
@ -35,7 +35,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 	int ret;

 	ret = -ERESTARTSYS;
-	if (down_interruptible(PIPE_SEM(*inode)))
+	if (mutex_lock_interruptible(PIPE_MUTEX(*inode)))
 		goto err_nolock_nocleanup;

 	if (!inode->i_pipe) {
@ -119,7 +119,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 	}

 	/* Ok! */
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));
 	return 0;

 err_rd:
@ -139,7 +139,7 @@ static int fifo_open(struct inode *inode, struct file *filp)
 		free_pipe_info(inode);

 err_nocleanup:
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 err_nolock_nocleanup:
 	return ret;
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@ -560,9 +560,9 @@ static ssize_t fuse_direct_write(struct file *file, const char __user *buf,
 	struct inode *inode = file->f_dentry->d_inode;
 	ssize_t res;
 	/* Don't allow parallel writes to the same file */
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	res = fuse_direct_io(file, buf, count, ppos, 1);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return res;
 }

--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@ -547,13 +547,13 @@ static int hfs_file_release(struct inode *inode, struct file *file)
 	if (atomic_read(&file->f_count) != 0)
 		return 0;
 	if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);
 		hfs_file_truncate(inode);
 		//if (inode->i_flags & S_DEAD) {
 		//	hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
 		//	hfs_delete_inode(inode);
 		//}
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 	}
 	return 0;
 }
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@ -29,7 +29,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *ma
 		return size;

 	dprint(DBG_BITMAP, "block_allocate: %u,%u,%u\n", size, offset, len);
-	down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mutex_lock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
 	mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
 	page = read_cache_page(mapping, offset / PAGE_CACHE_BITS,
 			       (filler_t *)mapping->a_ops->readpage, NULL);
@ -143,7 +143,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *ma
 	sb->s_dirt = 1;
 	dprint(DBG_BITMAP, "-> %u,%u\n", start, *max);
 out:
-	up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mutex_unlock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
 	return start;
 }

@ -164,7 +164,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
 	if ((offset + count) > HFSPLUS_SB(sb).total_blocks)
 		return -2;

-	down(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mutex_lock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
 	mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
 	pnr = offset / PAGE_CACHE_BITS;
 	page = read_cache_page(mapping, pnr, (filler_t *)mapping->a_ops->readpage, NULL);
@ -215,7 +215,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count)
 	kunmap(page);
 	HFSPLUS_SB(sb).free_blocks += len;
 	sb->s_dirt = 1;
-	up(&HFSPLUS_SB(sb).alloc_file->i_sem);
+	mutex_unlock(&HFSPLUS_SB(sb).alloc_file->i_mutex);

 	return 0;
 }
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@ -276,13 +276,13 @@ static int hfsplus_file_release(struct inode *inode, struct file *file)
 	if (atomic_read(&file->f_count) != 0)
 		return 0;
 	if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);
 		hfsplus_file_truncate(inode);
 		if (inode->i_flags & S_DEAD) {
 			hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
 			hfsplus_delete_inode(inode);
 		}
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 	}
 	return 0;
 }
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@ -32,19 +32,19 @@ static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)

 	/*printk("dir lseek\n");*/
 	if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
-	down(&i->i_sem);
+	mutex_lock(&i->i_mutex);
 	pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1;
 	while (pos != new_off) {
 		if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh);
 		else goto fail;
 		if (pos == 12) goto fail;
 	}
-	up(&i->i_sem);
+	mutex_unlock(&i->i_mutex);
 ok:
 	unlock_kernel();
 	return filp->f_pos = new_off;
 fail:
-	up(&i->i_sem);
+	mutex_unlock(&i->i_mutex);
 	/*printk("illegal lseek: %016llx\n", new_off);*/
 	unlock_kernel();
 	return -ESPIPE;
--- a/fs/hppfs/hppfs_kern.c
+++ b/fs/hppfs/hppfs_kern.c
@ -171,12 +171,12 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,

 	err = -ENOMEM;
 	parent = HPPFS_I(ino)->proc_dentry;
-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	proc_dentry = d_lookup(parent, &dentry->d_name);
 	if(proc_dentry == NULL){
 		proc_dentry = d_alloc(parent, &dentry->d_name);
 		if(proc_dentry == NULL){
-			up(&parent->d_inode->i_sem);
+			mutex_unlock(&parent->d_inode->i_mutex);
 			goto out;
 		}
 		new = (*parent->d_inode->i_op->lookup)(parent->d_inode,
@ -186,7 +186,7 @@ static struct dentry *hppfs_lookup(struct inode *ino, struct dentry *dentry,
 			proc_dentry = new;
 		}
 	}
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);

 	if(IS_ERR(proc_dentry))
 		return(proc_dentry);
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@ -118,7 +118,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)

 	vma_len = (loff_t)(vma->vm_end - vma->vm_start);

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	file_accessed(file);
 	vma->vm_flags |= VM_HUGETLB | VM_RESERVED;
 	vma->vm_ops = &hugetlb_vm_ops;
@ -133,7 +133,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	if (inode->i_size < len)
 		inode->i_size = len;
 out:
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);

 	return ret;
 }
--- a/fs/inode.c
+++ b/fs/inode.c
@ -192,7 +192,7 @@ void inode_init_once(struct inode *inode)
 	INIT_HLIST_NODE(&inode->i_hash);
 	INIT_LIST_HEAD(&inode->i_dentry);
 	INIT_LIST_HEAD(&inode->i_devices);
-	sema_init(&inode->i_sem, 1);
+	mutex_init(&inode->i_mutex);
 	init_rwsem(&inode->i_alloc_sem);
 	INIT_RADIX_TREE(&inode->i_data.page_tree, GFP_ATOMIC);
 	rwlock_init(&inode->i_data.tree_lock);
--- a/fs/jffs/inode-v23.c
+++ b/fs/jffs/inode-v23.c
@ -1415,7 +1415,7 @@ jffs_file_write(struct file *filp, const char *buf, size_t count,
 	 * This will never trigger with sane page sizes.  leave it in
 	 * anyway, since I'm thinking about how to merge larger writes
 	 * (the current idea is to poke a thread that does the actual
-	 * I/O and starts by doing a down(&inode->i_sem).  then we
+	 * I/O and starts by doing a mutex_lock(&inode->i_mutex).  then we
 	 * would need to get the page cache pages and have a list of
 	 * I/O requests and do write-merging here.
 	 * -- prumpf
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@ -58,7 +58,7 @@ struct jfs_inode_info {
 	/*
 	 * rdwrlock serializes xtree between reads & writes and synchronizes
 	 * changes to special inodes.  It's use would be redundant on
-	 * directories since the i_sem taken in the VFS is sufficient.
+	 * directories since the i_mutex taken in the VFS is sufficient.
 	 */
 	struct rw_semaphore rdwrlock;
 	/*
@ -68,7 +68,7 @@ struct jfs_inode_info {
 	 * inode is blocked in txBegin or TxBeginAnon
 	 */
 	struct semaphore commit_sem;
-	/* xattr_sem allows us to access the xattrs without taking i_sem */
+	/* xattr_sem allows us to access the xattrs without taking i_mutex */
 	struct rw_semaphore xattr_sem;
 	lid_t	xtlid;		/* lid of xtree lock on directory */
 #ifdef CONFIG_JFS_POSIX_ACL
--- a/fs/libfs.c
+++ b/fs/libfs.c
@ -74,7 +74,7 @@ int dcache_dir_close(struct inode *inode, struct file *file)

 loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 {
-	down(&file->f_dentry->d_inode->i_sem);
+	mutex_lock(&file->f_dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += file->f_pos;
@ -82,7 +82,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 			if (offset >= 0)
 				break;
 		default:
-			up(&file->f_dentry->d_inode->i_sem);
+			mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {
@ -106,7 +106,7 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
 			spin_unlock(&dcache_lock);
 		}
 	}
-	up(&file->f_dentry->d_inode->i_sem);
+	mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 	return offset;
 }

@ -356,7 +356,7 @@ int simple_commit_write(struct file *file, struct page *page,

 	/*
 	 * No need to use i_size_read() here, the i_size
-	 * cannot change under us because we hold the i_sem.
+	 * cannot change under us because we hold the i_mutex.
 	 */
 	if (pos > inode->i_size)
 		i_size_write(inode, pos);
--- a/fs/namei.c
+++ b/fs/namei.c
@ -438,7 +438,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 	struct dentry * result;
 	struct inode *dir = parent->d_inode;

-	down(&dir->i_sem);
+	mutex_lock(&dir->i_mutex);
 	/*
 	 * First re-do the cached lookup just in case it was created
 	 * while we waited for the directory semaphore..
@ -464,7 +464,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 			else
 				result = dentry;
 		}
-		up(&dir->i_sem);
+		mutex_unlock(&dir->i_mutex);
 		return result;
 	}

@ -472,7 +472,7 @@ static struct dentry * real_lookup(struct dentry * parent, struct qstr * name, s
 	 * Uhhuh! Nasty case: the cache was re-populated while
 	 * we waited on the semaphore. Need to revalidate.
 	 */
-	up(&dir->i_sem);
+	mutex_unlock(&dir->i_mutex);
 	if (result->d_op && result->d_op->d_revalidate) {
 		if (!result->d_op->d_revalidate(result, nd) && !d_invalidate(result)) {
 			dput(result);
@ -1366,7 +1366,7 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)
 	struct dentry *p;

 	if (p1 == p2) {
-		down(&p1->d_inode->i_sem);
+		mutex_lock(&p1->d_inode->i_mutex);
 		return NULL;
 	}

@ -1374,30 +1374,30 @@ struct dentry *lock_rename(struct dentry *p1, struct dentry *p2)

 	for (p = p1; p->d_parent != p; p = p->d_parent) {
 		if (p->d_parent == p2) {
-			down(&p2->d_inode->i_sem);
-			down(&p1->d_inode->i_sem);
+			mutex_lock(&p2->d_inode->i_mutex);
+			mutex_lock(&p1->d_inode->i_mutex);
 			return p;
 		}
 	}

 	for (p = p2; p->d_parent != p; p = p->d_parent) {
 		if (p->d_parent == p1) {
-			down(&p1->d_inode->i_sem);
-			down(&p2->d_inode->i_sem);
+			mutex_lock(&p1->d_inode->i_mutex);
+			mutex_lock(&p2->d_inode->i_mutex);
 			return p;
 		}
 	}

-	down(&p1->d_inode->i_sem);
-	down(&p2->d_inode->i_sem);
+	mutex_lock(&p1->d_inode->i_mutex);
+	mutex_lock(&p2->d_inode->i_mutex);
 	return NULL;
 }

 void unlock_rename(struct dentry *p1, struct dentry *p2)
 {
-	up(&p1->d_inode->i_sem);
+	mutex_unlock(&p1->d_inode->i_mutex);
 	if (p1 != p2) {
-		up(&p2->d_inode->i_sem);
+		mutex_unlock(&p2->d_inode->i_mutex);
 		up(&p1->d_inode->i_sb->s_vfs_rename_sem);
 	}
 }
@ -1563,14 +1563,14 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)

 	dir = nd->dentry;
 	nd->flags &= ~LOOKUP_PARENT;
-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	path.dentry = lookup_hash(nd);
 	path.mnt = nd->mnt;

 do_last:
 	error = PTR_ERR(path.dentry);
 	if (IS_ERR(path.dentry)) {
-		up(&dir->d_inode->i_sem);
+		mutex_unlock(&dir->d_inode->i_mutex);
 		goto exit;
 	}

@ -1579,7 +1579,7 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
 		if (!IS_POSIXACL(dir->d_inode))
 			mode &= ~current->fs->umask;
 		error = vfs_create(dir->d_inode, path.dentry, mode, nd);
-		up(&dir->d_inode->i_sem);
+		mutex_unlock(&dir->d_inode->i_mutex);
 		dput(nd->dentry);
 		nd->dentry = path.dentry;
 		if (error)
@ -1593,7 +1593,7 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
 	/*
 	 * It already exists.
 	 */
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);

 	error = -EEXIST;
 	if (flag & O_EXCL)
@ -1665,7 +1665,7 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
 		goto exit;
 	}
 	dir = nd->dentry;
-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	path.dentry = lookup_hash(nd);
 	path.mnt = nd->mnt;
 	__putname(nd->last.name);
@ -1680,13 +1680,13 @@ int open_namei(const char * pathname, int flag, int mode, struct nameidata *nd)
 * Simple function to lookup and return a dentry and create it
 * if it doesn't exist.  Is SMP-safe.
 *
- * Returns with nd->dentry->d_inode->i_sem locked.
+ * Returns with nd->dentry->d_inode->i_mutex locked.
 */
 struct dentry *lookup_create(struct nameidata *nd, int is_dir)
 {
 	struct dentry *dentry = ERR_PTR(-EEXIST);

-	down(&nd->dentry->d_inode->i_sem);
+	mutex_lock(&nd->dentry->d_inode->i_mutex);
 	/*
 	 * Yucky last component or no last component at all?
 	 * (foo/., foo/.., /////)
@ -1784,7 +1784,7 @@ asmlinkage long sys_mknod(const char __user * filename, int mode, unsigned dev)
 		}
 		dput(dentry);
 	}
-	up(&nd.dentry->d_inode->i_sem);
+	mutex_unlock(&nd.dentry->d_inode->i_mutex);
 	path_release(&nd);
 out:
 	putname(tmp);
@ -1836,7 +1836,7 @@ asmlinkage long sys_mkdir(const char __user * pathname, int mode)
 			error = vfs_mkdir(nd.dentry->d_inode, dentry, mode);
 			dput(dentry);
 		}
-		up(&nd.dentry->d_inode->i_sem);
+		mutex_unlock(&nd.dentry->d_inode->i_mutex);
 		path_release(&nd);
 out:
 		putname(tmp);
@ -1885,7 +1885,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)

 	DQUOT_INIT(dir);

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	dentry_unhash(dentry);
 	if (d_mountpoint(dentry))
 		error = -EBUSY;
@ -1897,7 +1897,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 				dentry->d_inode->i_flags |= S_DEAD;
 		}
 	}
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 	if (!error) {
 		d_delete(dentry);
 	}
@ -1932,14 +1932,14 @@ asmlinkage long sys_rmdir(const char __user * pathname)
 			error = -EBUSY;
 			goto exit1;
 	}
-	down(&nd.dentry->d_inode->i_sem);
+	mutex_lock(&nd.dentry->d_inode->i_mutex);
 	dentry = lookup_hash(&nd);
 	error = PTR_ERR(dentry);
 	if (!IS_ERR(dentry)) {
 		error = vfs_rmdir(nd.dentry->d_inode, dentry);
 		dput(dentry);
 	}
-	up(&nd.dentry->d_inode->i_sem);
+	mutex_unlock(&nd.dentry->d_inode->i_mutex);
 exit1:
 	path_release(&nd);
 exit:
@ -1959,7 +1959,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)

 	DQUOT_INIT(dir);

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	if (d_mountpoint(dentry))
 		error = -EBUSY;
 	else {
@ -1967,7 +1967,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
 		if (!error)
 			error = dir->i_op->unlink(dir, dentry);
 	}
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	/* We don't d_delete() NFS sillyrenamed files--they still exist. */
 	if (!error && !(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
@ -1979,7 +1979,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)

 /*
 * Make sure that the actual truncation of the file will occur outside its
- * directory's i_sem.  Truncate can take a long time if there is a lot of
+ * directory's i_mutex.  Truncate can take a long time if there is a lot of
 * writeout happening, and we don't want to prevent access to the directory
 * while waiting on the I/O.
 */
@ -2001,7 +2001,7 @@ asmlinkage long sys_unlink(const char __user * pathname)
 	error = -EISDIR;
 	if (nd.last_type != LAST_NORM)
 		goto exit1;
-	down(&nd.dentry->d_inode->i_sem);
+	mutex_lock(&nd.dentry->d_inode->i_mutex);
 	dentry = lookup_hash(&nd);
 	error = PTR_ERR(dentry);
 	if (!IS_ERR(dentry)) {
@ -2015,7 +2015,7 @@ asmlinkage long sys_unlink(const char __user * pathname)
 	exit2:
 		dput(dentry);
 	}
-	up(&nd.dentry->d_inode->i_sem);
+	mutex_unlock(&nd.dentry->d_inode->i_mutex);
 	if (inode)
 		iput(inode);	/* truncate the inode here */
 exit1:
@ -2075,7 +2075,7 @@ asmlinkage long sys_symlink(const char __user * oldname, const char __user * new
 			error = vfs_symlink(nd.dentry->d_inode, dentry, from, S_IALLUGO);
 			dput(dentry);
 		}
-		up(&nd.dentry->d_inode->i_sem);
+		mutex_unlock(&nd.dentry->d_inode->i_mutex);
 		path_release(&nd);
 out:
 		putname(to);
@ -2113,10 +2113,10 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 	if (error)
 		return error;

-	down(&old_dentry->d_inode->i_sem);
+	mutex_lock(&old_dentry->d_inode->i_mutex);
 	DQUOT_INIT(dir);
 	error = dir->i_op->link(old_dentry, dir, new_dentry);
-	up(&old_dentry->d_inode->i_sem);
+	mutex_unlock(&old_dentry->d_inode->i_mutex);
 	if (!error)
 		fsnotify_create(dir, new_dentry->d_name.name);
 	return error;
@ -2157,7 +2157,7 @@ asmlinkage long sys_link(const char __user * oldname, const char __user * newnam
 		error = vfs_link(old_nd.dentry, nd.dentry->d_inode, new_dentry);
 		dput(new_dentry);
 	}
-	up(&nd.dentry->d_inode->i_sem);
+	mutex_unlock(&nd.dentry->d_inode->i_mutex);
 out_release:
 	path_release(&nd);
 out:
@ -2178,7 +2178,7 @@ asmlinkage long sys_link(const char __user * oldname, const char __user * newnam
 *	   sb->s_vfs_rename_sem. We might be more accurate, but that's another
 *	   story.
 *	c) we have to lock _three_ objects - parents and victim (if it exists).
- *	   And that - after we got ->i_sem on parents (until then we don't know
+ *	   And that - after we got ->i_mutex on parents (until then we don't know
 *	   whether the target exists).  Solution: try to be smart with locking
 *	   order for inodes.  We rely on the fact that tree topology may change
 *	   only under ->s_vfs_rename_sem _and_ that parent of the object we
@ -2195,9 +2195,9 @@ asmlinkage long sys_link(const char __user * oldname, const char __user * newnam
 *	   stuff into VFS), but the former is not going away. Solution: the same
 *	   trick as in rmdir().
 *	e) conversion from fhandle to dentry may come in the wrong moment - when
- *	   we are removing the target. Solution: we will have to grab ->i_sem
+ *	   we are removing the target. Solution: we will have to grab ->i_mutex
 *	   in the fhandle_to_dentry code. [FIXME - current nfsfh.c relies on
- *	   ->i_sem on parents, which works but leads to some truely excessive
+ *	   ->i_mutex on parents, which works but leads to some truely excessive
 *	   locking].
 */
 static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
@ -2222,7 +2222,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,

 	target = new_dentry->d_inode;
 	if (target) {
-		down(&target->i_sem);
+		mutex_lock(&target->i_mutex);
 		dentry_unhash(new_dentry);
 	}
 	if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
@ -2232,7 +2232,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 	if (target) {
 		if (!error)
 			target->i_flags |= S_DEAD;
-		up(&target->i_sem);
+		mutex_unlock(&target->i_mutex);
 		if (d_unhashed(new_dentry))
 			d_rehash(new_dentry);
 		dput(new_dentry);
@ -2255,7 +2255,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
 	dget(new_dentry);
 	target = new_dentry->d_inode;
 	if (target)
-		down(&target->i_sem);
+		mutex_lock(&target->i_mutex);
 	if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
 		error = -EBUSY;
 	else
@ -2266,7 +2266,7 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
 			d_move(old_dentry, new_dentry);
 	}
 	if (target)
-		up(&target->i_sem);
+		mutex_unlock(&target->i_mutex);
 	dput(new_dentry);
 	return error;
 }
--- a/fs/namespace.c
+++ b/fs/namespace.c
@ -814,7 +814,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
 		return -ENOTDIR;

 	err = -ENOENT;
-	down(&nd->dentry->d_inode->i_sem);
+	mutex_lock(&nd->dentry->d_inode->i_mutex);
 	if (IS_DEADDIR(nd->dentry->d_inode))
 		goto out_unlock;

@ -826,7 +826,7 @@ static int graft_tree(struct vfsmount *mnt, struct nameidata *nd)
 	if (IS_ROOT(nd->dentry) || !d_unhashed(nd->dentry))
 		err = attach_recursive_mnt(mnt, nd, NULL);
 out_unlock:
-	up(&nd->dentry->d_inode->i_sem);
+	mutex_unlock(&nd->dentry->d_inode->i_mutex);
 	if (!err)
 		security_sb_post_addmount(mnt, nd);
 	return err;
@ -962,7 +962,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
 		goto out;

 	err = -ENOENT;
-	down(&nd->dentry->d_inode->i_sem);
+	mutex_lock(&nd->dentry->d_inode->i_mutex);
 	if (IS_DEADDIR(nd->dentry->d_inode))
 		goto out1;

@ -1004,7 +1004,7 @@ static int do_move_mount(struct nameidata *nd, char *old_name)
 	list_del_init(&old_nd.mnt->mnt_expire);
 	spin_unlock(&vfsmount_lock);
 out1:
-	up(&nd->dentry->d_inode->i_sem);
+	mutex_unlock(&nd->dentry->d_inode->i_mutex);
 out:
 	up_write(&namespace_sem);
 	if (!err)
@ -1573,7 +1573,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
 	user_nd.dentry = dget(current->fs->root);
 	read_unlock(&current->fs->lock);
 	down_write(&namespace_sem);
-	down(&old_nd.dentry->d_inode->i_sem);
+	mutex_lock(&old_nd.dentry->d_inode->i_mutex);
 	error = -EINVAL;
 	if (IS_MNT_SHARED(old_nd.mnt) ||
 		IS_MNT_SHARED(new_nd.mnt->mnt_parent) ||
@ -1626,7 +1626,7 @@ asmlinkage long sys_pivot_root(const char __user * new_root,
 	path_release(&root_parent);
 	path_release(&parent_nd);
 out2:
-	up(&old_nd.dentry->d_inode->i_sem);
+	mutex_unlock(&old_nd.dentry->d_inode->i_mutex);
 	up_write(&namespace_sem);
 	path_release(&user_nd);
 	path_release(&old_nd);
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@ -194,7 +194,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page)
 	spin_unlock(&inode->i_lock);
 	/* Ensure consistent page alignment of the data.
 	 * Note: assumes we have exclusive access to this mapping either
-	 *	 through inode->i_sem or some other mechanism.
+	 *	 through inode->i_mutex or some other mechanism.
 	 */
 	if (page->index == 0)
 		invalidate_inode_pages2_range(inode->i_mapping, PAGE_CACHE_SIZE, -1);
@ -573,7 +573,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir)

 loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
 {
-	down(&filp->f_dentry->d_inode->i_sem);
+	mutex_lock(&filp->f_dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += filp->f_pos;
@ -589,7 +589,7 @@ loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin)
 		((struct nfs_open_context *)filp->private_data)->dir_cookie = 0;
 	}
 out:
-	up(&filp->f_dentry->d_inode->i_sem);
+	mutex_unlock(&filp->f_dentry->d_inode->i_mutex);
 	return offset;
 }

@ -1001,7 +1001,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
 	openflags &= ~(O_CREAT|O_TRUNC);

 	/*
-	 * Note: we're not holding inode->i_sem and so may be racing with
+	 * Note: we're not holding inode->i_mutex and so may be racing with
 	 * operations that change the directory. We therefore save the
 	 * change attribute *before* we do the RPC call.
 	 */
@ -1051,7 +1051,7 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc)
 		return dentry;
 	if (!desc->plus || !(entry->fattr->valid & NFS_ATTR_FATTR))
 		return NULL;
-	/* Note: caller is already holding the dir->i_sem! */
+	/* Note: caller is already holding the dir->i_mutex! */
 	dentry = d_alloc(parent, &name);
 	if (dentry == NULL)
 		return NULL;
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@ -121,9 +121,9 @@ nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname)
 static void
 nfsd4_sync_rec_dir(void)
 {
-	down(&rec_dir.dentry->d_inode->i_sem);
+	mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
 	nfsd_sync_dir(rec_dir.dentry);
-	up(&rec_dir.dentry->d_inode->i_sem);
+	mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
 }

 int
@ -143,7 +143,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
 	nfs4_save_user(&uid, &gid);

 	/* lock the parent */
-	down(&rec_dir.dentry->d_inode->i_sem);
+	mutex_lock(&rec_dir.dentry->d_inode->i_mutex);

 	dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
 	if (IS_ERR(dentry)) {
@ -159,7 +159,7 @@ nfsd4_create_clid_dir(struct nfs4_client *clp)
 out_put:
 	dput(dentry);
 out_unlock:
-	up(&rec_dir.dentry->d_inode->i_sem);
+	mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
 	if (status == 0) {
 		clp->cl_firststate = 1;
 		nfsd4_sync_rec_dir();
@ -259,9 +259,9 @@ nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry)
 		printk("nfsd4: non-file found in client recovery directory\n");
 		return -EINVAL;
 	}
-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	status = vfs_unlink(dir->d_inode, dentry);
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);
 	return status;
 }

@ -274,9 +274,9 @@ nfsd4_clear_clid_dir(struct dentry *dir, struct dentry *dentry)
 	 * any regular files anyway, just in case the directory was created by
 	 * a kernel from the future.... */
 	nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file);
-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	status = vfs_rmdir(dir->d_inode, dentry);
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);
 	return status;
 }

@ -288,9 +288,9 @@ nfsd4_unlink_clid_dir(char *name, int namlen)

 	dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);

-	down(&rec_dir.dentry->d_inode->i_sem);
+	mutex_lock(&rec_dir.dentry->d_inode->i_mutex);
 	dentry = lookup_one_len(name, rec_dir.dentry, namlen);
-	up(&rec_dir.dentry->d_inode->i_sem);
+	mutex_unlock(&rec_dir.dentry->d_inode->i_mutex);
 	if (IS_ERR(dentry)) {
 		status = PTR_ERR(dentry);
 		return status;
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@ -390,12 +390,12 @@ set_nfsv4_acl_one(struct dentry *dentry, struct posix_acl *pacl, char *key)

 	error = -EOPNOTSUPP;
 	if (inode->i_op && inode->i_op->setxattr) {
-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);
 		security_inode_setxattr(dentry, key, buf, len, 0);
 		error = inode->i_op->setxattr(dentry, key, buf, len, 0);
 		if (!error)
 			security_inode_post_setxattr(dentry, key, buf, len, 0);
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 	}
 out:
 	kfree(buf);
@ -739,9 +739,9 @@ nfsd_sync(struct file *filp)
        int err;
 	struct inode *inode = filp->f_dentry->d_inode;
 	dprintk("nfsd: sync file %s\n", filp->f_dentry->d_name.name);
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	err=nfsd_dosync(filp, filp->f_dentry, filp->f_op);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);

 	return err;
 }
@ -885,9 +885,9 @@ static void kill_suid(struct dentry *dentry)
 	struct iattr	ia;
 	ia.ia_valid = ATTR_KILL_SUID | ATTR_KILL_SGID;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	notify_change(dentry, &ia);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 }

 static inline int
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@ -1532,7 +1532,7 @@ int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
 * NOTE to self: No changes in the attribute list are required to move from
 *		 a resident to a non-resident attribute.
 *
- * Locking: - The caller must hold i_sem on the inode.
+ * Locking: - The caller must hold i_mutex on the inode.
 */
 int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
 {
@ -1728,7 +1728,7 @@ int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size)
 	/*
 	 * This needs to be last since the address space operations ->readpage
 	 * and ->writepage can run concurrently with us as they are not
-	 * serialized on i_sem.  Note, we are not allowed to fail once we flip
+	 * serialized on i_mutex.  Note, we are not allowed to fail once we flip
 	 * this switch, which is another reason to do this last.
 	 */
 	NInoSetNonResident(ni);
--- a/fs/ntfs/dir.c
+++ b/fs/ntfs/dir.c
@ -69,7 +69,7 @@ ntfschar I30[5] = { const_cpu_to_le16('$'), const_cpu_to_le16('I'),
 * work but we don't care for how quickly one can access them. This also fixes
 * the dcache aliasing issues.
 *
- * Locking:  - Caller must hold i_sem on the directory.
+ * Locking:  - Caller must hold i_mutex on the directory.
 *	     - Each page cache page in the index allocation mapping must be
 *	       locked whilst being accessed otherwise we may find a corrupt
 *	       page due to it being under ->writepage at the moment which
@ -1085,11 +1085,11 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t fpos,
 * While this will return the names in random order this doesn't matter for
 * ->readdir but OTOH results in a faster ->readdir.
 *
- * VFS calls ->readdir without BKL but with i_sem held. This protects the VFS
+ * VFS calls ->readdir without BKL but with i_mutex held. This protects the VFS
 * parts (e.g. ->f_pos and ->i_size, and it also protects against directory
 * modifications).
 *
- * Locking:  - Caller must hold i_sem on the directory.
+ * Locking:  - Caller must hold i_mutex on the directory.
 *	     - Each page cache page in the index allocation mapping must be
 *	       locked whilst being accessed otherwise we may find a corrupt
 *	       page due to it being under ->writepage at the moment which
@ -1520,7 +1520,7 @@ static int ntfs_dir_open(struct inode *vi, struct file *filp)
 * Note: In the past @filp could be NULL so we ignore it as we don't need it
 * anyway.
 *
- * Locking: Caller must hold i_sem on the inode.
+ * Locking: Caller must hold i_mutex on the inode.
 *
 * TODO: We should probably also write all attribute/index inodes associated
 * with this inode but since we have no simple way of getting to them we ignore
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@ -106,7 +106,7 @@ static int ntfs_file_open(struct inode *vi, struct file *filp)
 * this is the case, the necessary zeroing will also have happened and that all
 * metadata is self-consistent.
 *
- * Locking: i_sem on the vfs inode corrseponsind to the ntfs inode @ni must be
+ * Locking: i_mutex on the vfs inode corrseponsind to the ntfs inode @ni must be
 *	    held by the caller.
 */
 static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size,
@ -473,7 +473,7 @@ static inline int ntfs_submit_bh_for_read(struct buffer_head *bh)
 * @bytes:	number of bytes to be written
 *
 * This is called for non-resident attributes from ntfs_file_buffered_write()
- * with i_sem held on the inode (@pages[0]->mapping->host).  There are
+ * with i_mutex held on the inode (@pages[0]->mapping->host).  There are
 * @nr_pages pages in @pages which are locked but not kmap()ped.  The source
 * data has not yet been copied into the @pages.
 * 
@ -1637,7 +1637,7 @@ static inline int ntfs_commit_pages_after_non_resident_write(
 * @pos:	byte position in file at which the write begins
 * @bytes:	number of bytes to be written
 *
- * This is called from ntfs_file_buffered_write() with i_sem held on the inode
+ * This is called from ntfs_file_buffered_write() with i_mutex held on the inode
 * (@pages[0]->mapping->host).  There are @nr_pages pages in @pages which are
 * locked but not kmap()ped.  The source data has already been copied into the
 * @page.  ntfs_prepare_pages_for_non_resident_write() has been called before
@ -1814,7 +1814,7 @@ static int ntfs_commit_pages_after_write(struct page **pages,
 /**
 * ntfs_file_buffered_write -
 *
- * Locking: The vfs is holding ->i_sem on the inode.
+ * Locking: The vfs is holding ->i_mutex on the inode.
 */
 static ssize_t ntfs_file_buffered_write(struct kiocb *iocb,
 		const struct iovec *iov, unsigned long nr_segs,
@ -2196,9 +2196,9 @@ static ssize_t ntfs_file_aio_write(struct kiocb *iocb, const char __user *buf,

 	BUG_ON(iocb->ki_pos != pos);

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	ret = ntfs_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
 		int err = sync_page_range(inode, mapping, pos, ret);
 		if (err < 0)
@ -2221,12 +2221,12 @@ static ssize_t ntfs_file_writev(struct file *file, const struct iovec *iov,
 	struct kiocb kiocb;
 	ssize_t ret;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	init_sync_kiocb(&kiocb, file);
 	ret = ntfs_file_aio_write_nolock(&kiocb, iov, nr_segs, ppos);
 	if (ret == -EIOCBQUEUED)
 		ret = wait_on_sync_kiocb(&kiocb);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	if (ret > 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
 		int err = sync_page_range(inode, mapping, *ppos - ret, ret);
 		if (err < 0)
@ -2269,7 +2269,7 @@ static ssize_t ntfs_file_write(struct file *file, const char __user *buf,
 * Note: In the past @filp could be NULL so we ignore it as we don't need it
 * anyway.
 *
- * Locking: Caller must hold i_sem on the inode.
+ * Locking: Caller must hold i_mutex on the inode.
 *
 * TODO: We should probably also write all attribute/index inodes associated
 * with this inode but since we have no simple way of getting to them we ignore
--- a/fs/ntfs/index.c
+++ b/fs/ntfs/index.c
@ -32,7 +32,7 @@
 * Allocate a new index context, initialize it with @idx_ni and return it.
 * Return NULL if allocation failed.
 *
- * Locking:  Caller must hold i_sem on the index inode.
+ * Locking:  Caller must hold i_mutex on the index inode.
 */
 ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni)
 {
@ -50,7 +50,7 @@ ntfs_index_context *ntfs_index_ctx_get(ntfs_inode *idx_ni)
 *
 * Release the index context @ictx, releasing all associated resources.
 *
- * Locking:  Caller must hold i_sem on the index inode.
+ * Locking:  Caller must hold i_mutex on the index inode.
 */
 void ntfs_index_ctx_put(ntfs_index_context *ictx)
 {
@ -106,7 +106,7 @@ void ntfs_index_ctx_put(ntfs_index_context *ictx)
 * or ntfs_index_entry_write() before the call to ntfs_index_ctx_put() to
 * ensure that the changes are written to disk.
 *
- * Locking:  - Caller must hold i_sem on the index inode.
+ * Locking:  - Caller must hold i_mutex on the index inode.
 *	     - Each page cache page in the index allocation mapping must be
 *	       locked whilst being accessed otherwise we may find a corrupt
 *	       page due to it being under ->writepage at the moment which
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@ -2125,13 +2125,13 @@ void ntfs_put_inode(struct inode *vi)
 		ntfs_inode *ni = NTFS_I(vi);
 		if (NInoIndexAllocPresent(ni)) {
 			struct inode *bvi = NULL;
-			down(&vi->i_sem);
+			mutex_lock(&vi->i_mutex);
 			if (atomic_read(&vi->i_count) == 2) {
 				bvi = ni->itype.index.bmp_ino;
 				if (bvi)
 					ni->itype.index.bmp_ino = NULL;
 			}
-			up(&vi->i_sem);
+			mutex_unlock(&vi->i_mutex);
 			if (bvi)
 				iput(bvi);
 		}
@ -2311,7 +2311,7 @@ static const char *es = "  Leaving inconsistent metadata.  Unmount and run "
 *
 * Returns 0 on success or -errno on error.
 *
- * Called with ->i_sem held.  In all but one case ->i_alloc_sem is held for
+ * Called with ->i_mutex held.  In all but one case ->i_alloc_sem is held for
 * writing.  The only case in the kernel where ->i_alloc_sem is not held is
 * mm/filemap.c::generic_file_buffered_write() where vmtruncate() is called
 * with the current i_size as the offset.  The analogous place in NTFS is in
@ -2831,7 +2831,7 @@ void ntfs_truncate_vfs(struct inode *vi) {
 * We also abort all changes of user, group, and mode as we do not implement
 * the NTFS ACLs yet.
 *
- * Called with ->i_sem held.  For the ATTR_SIZE (i.e. ->truncate) case, also
+ * Called with ->i_mutex held.  For the ATTR_SIZE (i.e. ->truncate) case, also
 * called with ->i_alloc_sem held for writing.
 *
 * Basically this is a copy of generic notify_change() and inode_setattr()
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@ -96,7 +96,7 @@
 *    name. We then convert the name to the current NLS code page, and proceed
 *    searching for a dentry with this name, etc, as in case 2), above.
 *
- * Locking: Caller must hold i_sem on the directory.
+ * Locking: Caller must hold i_mutex on the directory.
 */
 static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
 		struct nameidata *nd)
@ -254,7 +254,7 @@ static struct dentry *ntfs_lookup(struct inode *dir_ino, struct dentry *dent,
 	nls_name.hash = full_name_hash(nls_name.name, nls_name.len);

 	/*
-	 * Note: No need for dent->d_lock lock as i_sem is held on the
+	 * Note: No need for dent->d_lock lock as i_mutex is held on the
 	 * parent inode.
 	 */

@ -374,7 +374,7 @@ struct inode_operations ntfs_dir_inode_ops = {
 * The code is based on the ext3 ->get_parent() implementation found in
 * fs/ext3/namei.c::ext3_get_parent().
 *
- * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_sem down.
+ * Note: ntfs_get_parent() is called with @child_dent->d_inode->i_mutex down.
 *
 * Return the dentry of the parent directory on success or the error code on
 * error (IS_ERR() is true).
--- a/fs/ntfs/quota.c
+++ b/fs/ntfs/quota.c
@ -48,7 +48,7 @@ BOOL ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
 		ntfs_error(vol->sb, "Quota inodes are not open.");
 		return FALSE;
 	}
-	down(&vol->quota_q_ino->i_sem);
+	mutex_lock(&vol->quota_q_ino->i_mutex);
 	ictx = ntfs_index_ctx_get(NTFS_I(vol->quota_q_ino));
 	if (!ictx) {
 		ntfs_error(vol->sb, "Failed to get index context.");
@ -98,7 +98,7 @@ BOOL ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
 	ntfs_index_entry_mark_dirty(ictx);
 set_done:
 	ntfs_index_ctx_put(ictx);
-	up(&vol->quota_q_ino->i_sem);
+	mutex_unlock(&vol->quota_q_ino->i_mutex);
 	/*
 	 * We set the flag so we do not try to mark the quotas out of date
 	 * again on remount.
@ -110,7 +110,7 @@ BOOL ntfs_mark_quotas_out_of_date(ntfs_volume *vol)
 err_out:
 	if (ictx)
 		ntfs_index_ctx_put(ictx);
-	up(&vol->quota_q_ino->i_sem);
+	mutex_unlock(&vol->quota_q_ino->i_mutex);
 	return FALSE;
 }

--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@ -1213,10 +1213,10 @@ static int check_windows_hibernation_status(ntfs_volume *vol)
 	 * Find the inode number for the hibernation file by looking up the
 	 * filename hiberfil.sys in the root directory.
 	 */
-	down(&vol->root_ino->i_sem);
+	mutex_lock(&vol->root_ino->i_mutex);
 	mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12,
 			&name);
-	up(&vol->root_ino->i_sem);
+	mutex_unlock(&vol->root_ino->i_mutex);
 	if (IS_ERR_MREF(mref)) {
 		ret = MREF_ERR(mref);
 		/* If the file does not exist, Windows is not hibernated. */
@ -1307,10 +1307,10 @@ static BOOL load_and_init_quota(ntfs_volume *vol)
 	 * Find the inode number for the quota file by looking up the filename
 	 * $Quota in the extended system files directory $Extend.
 	 */
-	down(&vol->extend_ino->i_sem);
+	mutex_lock(&vol->extend_ino->i_mutex);
 	mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), Quota, 6,
 			&name);
-	up(&vol->extend_ino->i_sem);
+	mutex_unlock(&vol->extend_ino->i_mutex);
 	if (IS_ERR_MREF(mref)) {
 		/*
 		 * If the file does not exist, quotas are disabled and have
@ -1390,10 +1390,10 @@ static BOOL load_and_init_usnjrnl(ntfs_volume *vol)
 	 * Find the inode number for the transaction log file by looking up the
 	 * filename $UsnJrnl in the extended system files directory $Extend.
 	 */
-	down(&vol->extend_ino->i_sem);
+	mutex_lock(&vol->extend_ino->i_mutex);
 	mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8,
 			&name);
-	up(&vol->extend_ino->i_sem);
+	mutex_unlock(&vol->extend_ino->i_mutex);
 	if (IS_ERR_MREF(mref)) {
 		/*
 		 * If the file does not exist, transaction logging is disabled,
@ -2312,9 +2312,9 @@ static void ntfs_put_super(struct super_block *sb)
 	if (!list_empty(&sb->s_dirty)) {
 		const char *s1, *s2;

-		down(&vol->mft_ino->i_sem);
+		mutex_lock(&vol->mft_ino->i_mutex);
 		truncate_inode_pages(vol->mft_ino->i_mapping, 0);
-		up(&vol->mft_ino->i_sem);
+		mutex_unlock(&vol->mft_ino->i_mutex);
 		write_inode_now(vol->mft_ino, 1);
 		if (!list_empty(&sb->s_dirty)) {
 			static const char *_s1 = "inodes";
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@ -966,7 +966,7 @@ static int ocfs2_truncate_log_append(struct ocfs2_super *osb,
 	mlog_entry("start_blk = %"MLFu64", num_clusters = %u\n", start_blk,
 		   num_clusters);

-	BUG_ON(!down_trylock(&tl_inode->i_sem));
+	BUG_ON(mutex_trylock(&tl_inode->i_mutex));

 	start_cluster = ocfs2_blocks_to_clusters(osb->sb, start_blk);

@ -1108,7 +1108,7 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
 	return status;
 }

-/* Expects you to already be holding tl_inode->i_sem */
+/* Expects you to already be holding tl_inode->i_mutex */
 static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 {
 	int status;
@ -1123,7 +1123,7 @@ static int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)

 	mlog_entry_void();

-	BUG_ON(!down_trylock(&tl_inode->i_sem));
+	BUG_ON(mutex_trylock(&tl_inode->i_mutex));

 	di = (struct ocfs2_dinode *) tl_bh->b_data;
 	tl = &di->id2.i_dealloc;
@ -1198,9 +1198,9 @@ int ocfs2_flush_truncate_log(struct ocfs2_super *osb)
 	int status;
 	struct inode *tl_inode = osb->osb_tl_inode;

-	down(&tl_inode->i_sem);
+	mutex_lock(&tl_inode->i_mutex);
 	status = __ocfs2_flush_truncate_log(osb);
-	up(&tl_inode->i_sem);
+	mutex_unlock(&tl_inode->i_mutex);

 	return status;
 }
@ -1363,7 +1363,7 @@ int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
 	mlog(0, "cleanup %u records from %"MLFu64"\n", num_recs,
 	     tl_copy->i_blkno);

-	down(&tl_inode->i_sem);
+	mutex_lock(&tl_inode->i_mutex);
 	for(i = 0; i < num_recs; i++) {
 		if (ocfs2_truncate_log_needs_flush(osb)) {
 			status = __ocfs2_flush_truncate_log(osb);
@ -1395,7 +1395,7 @@ int ocfs2_complete_truncate_log_recovery(struct ocfs2_super *osb,
 	}

 bail_up:
-	up(&tl_inode->i_sem);
+	mutex_unlock(&tl_inode->i_mutex);

 	mlog_exit(status);
 	return status;
@ -1840,7 +1840,7 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,

 	mlog(0, "clusters_to_del = %u in this pass\n", clusters_to_del);

-	down(&tl_inode->i_sem);
+	mutex_lock(&tl_inode->i_mutex);
 	tl_sem = 1;
 	/* ocfs2_truncate_log_needs_flush guarantees us at least one
 	 * record is free for use. If there isn't any, we flush to get
@ -1875,7 +1875,7 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
 		goto bail;
 	}

-	up(&tl_inode->i_sem);
+	mutex_unlock(&tl_inode->i_mutex);
 	tl_sem = 0;

 	ocfs2_commit_trans(handle);
@ -1890,7 +1890,7 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
 	ocfs2_schedule_truncate_log_flush(osb, 1);

 	if (tl_sem)
-		up(&tl_inode->i_sem);
+		mutex_unlock(&tl_inode->i_mutex);

 	if (handle)
 		ocfs2_commit_trans(handle);
@ -1994,7 +1994,7 @@ int ocfs2_prepare_truncate(struct ocfs2_super *osb,
 			goto bail;
 		}

-		down(&ext_alloc_inode->i_sem);
+		mutex_lock(&ext_alloc_inode->i_mutex);
 		(*tc)->tc_ext_alloc_inode = ext_alloc_inode;

 		status = ocfs2_meta_lock(ext_alloc_inode,
@ -2026,7 +2026,7 @@ static void ocfs2_free_truncate_context(struct ocfs2_truncate_context *tc)
 		if (tc->tc_ext_alloc_locked)
 			ocfs2_meta_unlock(tc->tc_ext_alloc_inode, 1);

-		up(&tc->tc_ext_alloc_inode->i_sem);
+		mutex_unlock(&tc->tc_ext_alloc_inode->i_mutex);
 		iput(tc->tc_ext_alloc_inode);
 	}

--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@ -653,7 +653,7 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
 	struct config_group *o2hb_group = NULL, *ret = NULL;
 	void *defs = NULL;

-	/* this runs under the parent dir's i_sem; there can be only
+	/* this runs under the parent dir's i_mutex; there can be only
 	 * one caller in here at a time */
 	if (o2nm_single_cluster)
 		goto out; /* ENOSPC */
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@ -202,7 +202,7 @@ int ocfs2_readdir(struct file * filp, void * dirent, filldir_t filldir)
 }

 /*
- * NOTE: this should always be called with parent dir i_sem taken.
+ * NOTE: this should always be called with parent dir i_mutex taken.
 */
 int ocfs2_find_files_on_disk(const char *name,
 			     int namelen,
@ -245,7 +245,7 @@ int ocfs2_find_files_on_disk(const char *name,
 * Return 0 if the name does not exist
 * Return -EEXIST if the directory contains the name
 *
- * Callers should have i_sem + a cluster lock on dir
+ * Callers should have i_mutex + a cluster lock on dir
 */
 int ocfs2_check_dir_for_entry(struct inode *dir,
 			      const char *name,
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@ -492,7 +492,7 @@ static int ocfs2_extend_allocation(struct inode *inode,
 	}

 	/* blocks peope in read/write from reading our allocation
-	 * until we're done changing it. We depend on i_sem to block
+	 * until we're done changing it. We depend on i_mutex to block
 	 * other extend/truncate calls while we're here. Ordering wrt
 	 * start_trans is important here -- always do it before! */
 	down_write(&OCFS2_I(inode)->ip_alloc_sem);
@ -958,8 +958,8 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
 		filp->f_flags &= ~O_DIRECT;
 #endif

-	down(&inode->i_sem);
-	/* to match setattr's i_sem -> i_alloc_sem -> rw_lock ordering */
+	mutex_lock(&inode->i_mutex);
+	/* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */
 	if (filp->f_flags & O_DIRECT) {
 		have_alloc_sem = 1;
 		down_read(&inode->i_alloc_sem);
@ -1123,7 +1123,7 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
 		up_read(&inode->i_alloc_sem);
 	if (rw_level != -1) 
 		ocfs2_rw_unlock(inode, rw_level);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);

 	mlog_exit(ret);
 	return ret;
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@ -485,10 +485,10 @@ static int ocfs2_remove_inode(struct inode *inode,
 		goto bail;
 	}

-	down(&inode_alloc_inode->i_sem);
+	mutex_lock(&inode_alloc_inode->i_mutex);
 	status = ocfs2_meta_lock(inode_alloc_inode, NULL, &inode_alloc_bh, 1);
 	if (status < 0) {
-		up(&inode_alloc_inode->i_sem);
+		mutex_unlock(&inode_alloc_inode->i_mutex);

 		mlog_errno(status);
 		goto bail;
@ -536,7 +536,7 @@ static int ocfs2_remove_inode(struct inode *inode,
 	ocfs2_commit_trans(handle);
 bail_unlock:
 	ocfs2_meta_unlock(inode_alloc_inode, 1);
-	up(&inode_alloc_inode->i_sem);
+	mutex_unlock(&inode_alloc_inode->i_mutex);
 	brelse(inode_alloc_bh);
 bail:
 	iput(inode_alloc_inode);
@ -567,10 +567,10 @@ static int ocfs2_wipe_inode(struct inode *inode,
 	/* Lock the orphan dir. The lock will be held for the entire
 	 * delete_inode operation. We do this now to avoid races with
 	 * recovery completion on other nodes. */
-	down(&orphan_dir_inode->i_sem);
+	mutex_lock(&orphan_dir_inode->i_mutex);
 	status = ocfs2_meta_lock(orphan_dir_inode, NULL, &orphan_dir_bh, 1);
 	if (status < 0) {
-		up(&orphan_dir_inode->i_sem);
+		mutex_unlock(&orphan_dir_inode->i_mutex);

 		mlog_errno(status);
 		goto bail;
@ -593,7 +593,7 @@ static int ocfs2_wipe_inode(struct inode *inode,

 bail_unlock_dir:
 	ocfs2_meta_unlock(orphan_dir_inode, 1);
-	up(&orphan_dir_inode->i_sem);
+	mutex_unlock(&orphan_dir_inode->i_mutex);
 	brelse(orphan_dir_bh);
 bail:
 	iput(orphan_dir_inode);
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@ -216,7 +216,7 @@ void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle,
 	atomic_inc(&inode->i_count);

 	/* we're obviously changing it... */
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);

 	/* sanity check */
 	BUG_ON(OCFS2_I(inode)->ip_handle);
@ -241,7 +241,7 @@ static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle)
 		OCFS2_I(inode)->ip_handle = NULL;
 		list_del_init(&OCFS2_I(inode)->ip_handle_list);

-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 		iput(inode);
 	}
 }
@ -1433,10 +1433,10 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 		goto out;
 	}

-	down(&orphan_dir_inode->i_sem);
+	mutex_lock(&orphan_dir_inode->i_mutex);
 	status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0);
 	if (status < 0) {
-		up(&orphan_dir_inode->i_sem);
+		mutex_unlock(&orphan_dir_inode->i_mutex);
 		mlog_errno(status);
 		goto out;
 	}
@ -1451,7 +1451,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 		if (!bh)
 			status = -EINVAL;
 		if (status < 0) {
-			up(&orphan_dir_inode->i_sem);
+			mutex_unlock(&orphan_dir_inode->i_mutex);
 			if (bh)
 				brelse(bh);
 			mlog_errno(status);
@ -1465,7 +1465,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,

 			if (!ocfs2_check_dir_entry(orphan_dir_inode,
 						  de, bh, local)) {
-				up(&orphan_dir_inode->i_sem);
+				mutex_unlock(&orphan_dir_inode->i_mutex);
 				status = -EINVAL;
 				mlog_errno(status);
 				brelse(bh);
@ -1509,7 +1509,7 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 		}
 		brelse(bh);
 	}
-	up(&orphan_dir_inode->i_sem);
+	mutex_unlock(&orphan_dir_inode->i_mutex);

 	ocfs2_meta_unlock(orphan_dir_inode, 0);
 	have_disk_lock = 0;
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@ -334,7 +334,7 @@ int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb,
 		goto bail;
 	}

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);

 	status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno,
 				  &alloc_bh, 0, inode);
@ -367,7 +367,7 @@ int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb,
 		brelse(alloc_bh);

 	if (inode) {
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 		iput(inode);
 	}

@ -446,7 +446,7 @@ int ocfs2_complete_local_alloc_recovery(struct ocfs2_super *osb,

 /*
 * make sure we've got at least bitswanted contiguous bits in the
- * local alloc. You lose them when you drop i_sem.
+ * local alloc. You lose them when you drop i_mutex.
 *
 * We will add ourselves to the transaction passed in, but may start
 * our own in order to shift windows.
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@ -169,7 +169,7 @@ static match_table_t tokens = {
 */
 static void ocfs2_write_super(struct super_block *sb)
 {
-	if (down_trylock(&sb->s_lock) == 0)
+	if (mutex_trylock(&sb->s_lock) != 0)
 		BUG();
 	sb->s_dirt = 0;
 }
--- a/fs/open.c
+++ b/fs/open.c
@ -211,9 +211,9 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 		newattrs.ia_valid |= ATTR_FILE;
 	}

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	err = notify_change(dentry, &newattrs);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 	return err;
 }

@ -398,9 +398,9 @@ asmlinkage long sys_utime(char __user * filename, struct utimbuf __user * times)
 		    (error = vfs_permission(&nd, MAY_WRITE)) != 0)
 			goto dput_and_out;
 	}
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	error = notify_change(nd.dentry, &newattrs);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 dput_and_out:
 	path_release(&nd);
 out:
@ -451,9 +451,9 @@ long do_utimes(char __user * filename, struct timeval * times)
 		    (error = vfs_permission(&nd, MAY_WRITE)) != 0)
 			goto dput_and_out;
 	}
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	error = notify_change(nd.dentry, &newattrs);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 dput_and_out:
 	path_release(&nd);
 out:
@ -620,13 +620,13 @@ asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
 	err = -EPERM;
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		goto out_putf;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	if (mode == (mode_t) -1)
 		mode = inode->i_mode;
 	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
 	err = notify_change(dentry, &newattrs);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);

 out_putf:
 	fput(file);
@ -654,13 +654,13 @@ asmlinkage long sys_chmod(const char __user * filename, mode_t mode)
 	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
 		goto dput_and_out;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	if (mode == (mode_t) -1)
 		mode = inode->i_mode;
 	newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
 	newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
 	error = notify_change(nd.dentry, &newattrs);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);

 dput_and_out:
 	path_release(&nd);
@ -696,9 +696,9 @@ static int chown_common(struct dentry * dentry, uid_t user, gid_t group)
 	}
 	if (!S_ISDIR(inode->i_mode))
 		newattrs.ia_valid |= ATTR_KILL_SUID|ATTR_KILL_SGID;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	error = notify_change(dentry, &newattrs);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 out:
 	return error;
 }
--- a/fs/pipe.c
+++ b/fs/pipe.c
@ -44,10 +44,10 @@ void pipe_wait(struct inode * inode)
 	 * is considered a noninteractive wait:
 	 */
 	prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE|TASK_NONINTERACTIVE);
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));
 	schedule();
 	finish_wait(PIPE_WAIT(*inode), &wait);
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 }

 static inline int
@ -136,7 +136,7 @@ pipe_readv(struct file *filp, const struct iovec *_iov,

 	do_wakeup = 0;
 	ret = 0;
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	info = inode->i_pipe;
 	for (;;) {
 		int bufs = info->nrbufs;
@ -200,7 +200,7 @@ pipe_readv(struct file *filp, const struct iovec *_iov,
 		}
 		pipe_wait(inode);
 	}
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));
 	/* Signal writers asynchronously that there is more room.  */
 	if (do_wakeup) {
 		wake_up_interruptible(PIPE_WAIT(*inode));
@ -237,7 +237,7 @@ pipe_writev(struct file *filp, const struct iovec *_iov,

 	do_wakeup = 0;
 	ret = 0;
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	info = inode->i_pipe;

 	if (!PIPE_READERS(*inode)) {
@ -341,7 +341,7 @@ pipe_writev(struct file *filp, const struct iovec *_iov,
 		PIPE_WAITING_WRITERS(*inode)--;
 	}
 out:
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));
 	if (do_wakeup) {
 		wake_up_interruptible(PIPE_WAIT(*inode));
 		kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
@ -381,7 +381,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,

 	switch (cmd) {
 		case FIONREAD:
-			down(PIPE_SEM(*inode));
+			mutex_lock(PIPE_MUTEX(*inode));
 			info =  inode->i_pipe;
 			count = 0;
 			buf = info->curbuf;
@ -390,7 +390,7 @@ pipe_ioctl(struct inode *pino, struct file *filp,
 				count += info->bufs[buf].len;
 				buf = (buf+1) & (PIPE_BUFFERS-1);
 			}
-			up(PIPE_SEM(*inode));
+			mutex_unlock(PIPE_MUTEX(*inode));
 			return put_user(count, (int __user *)arg);
 		default:
 			return -EINVAL;
@ -433,7 +433,7 @@ pipe_poll(struct file *filp, poll_table *wait)
 static int
 pipe_release(struct inode *inode, int decr, int decw)
 {
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	PIPE_READERS(*inode) -= decr;
 	PIPE_WRITERS(*inode) -= decw;
 	if (!PIPE_READERS(*inode) && !PIPE_WRITERS(*inode)) {
@ -443,7 +443,7 @@ pipe_release(struct inode *inode, int decr, int decw)
 		kill_fasync(PIPE_FASYNC_READERS(*inode), SIGIO, POLL_IN);
 		kill_fasync(PIPE_FASYNC_WRITERS(*inode), SIGIO, POLL_OUT);
 	}
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	return 0;
 }
@ -454,9 +454,9 @@ pipe_read_fasync(int fd, struct file *filp, int on)
 	struct inode *inode = filp->f_dentry->d_inode;
 	int retval;

-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	if (retval < 0)
 		return retval;
@ -471,9 +471,9 @@ pipe_write_fasync(int fd, struct file *filp, int on)
 	struct inode *inode = filp->f_dentry->d_inode;
 	int retval;

-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	if (retval < 0)
 		return retval;
@ -488,14 +488,14 @@ pipe_rdwr_fasync(int fd, struct file *filp, int on)
 	struct inode *inode = filp->f_dentry->d_inode;
 	int retval;

-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));

 	retval = fasync_helper(fd, filp, on, PIPE_FASYNC_READERS(*inode));

 	if (retval >= 0)
 		retval = fasync_helper(fd, filp, on, PIPE_FASYNC_WRITERS(*inode));

-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	if (retval < 0)
 		return retval;
@ -534,9 +534,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
 {
 	/* We could have perhaps used atomic_t, but this and friends
 	   below are the only places.  So it doesn't seem worthwhile.  */
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	PIPE_READERS(*inode)++;
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	return 0;
 }
@ -544,9 +544,9 @@ pipe_read_open(struct inode *inode, struct file *filp)
 static int
 pipe_write_open(struct inode *inode, struct file *filp)
 {
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	PIPE_WRITERS(*inode)++;
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	return 0;
 }
@ -554,12 +554,12 @@ pipe_write_open(struct inode *inode, struct file *filp)
 static int
 pipe_rdwr_open(struct inode *inode, struct file *filp)
 {
-	down(PIPE_SEM(*inode));
+	mutex_lock(PIPE_MUTEX(*inode));
 	if (filp->f_mode & FMODE_READ)
 		PIPE_READERS(*inode)++;
 	if (filp->f_mode & FMODE_WRITE)
 		PIPE_WRITERS(*inode)++;
-	up(PIPE_SEM(*inode));
+	mutex_unlock(PIPE_MUTEX(*inode));

 	return 0;
 }
--- a/fs/quota.c
+++ b/fs/quota.c
@ -168,7 +168,7 @@ static void quota_sync_sb(struct super_block *sb, int type)
 	sync_blockdev(sb->s_bdev);

 	/* Now when everything is written we can discard the pagecache so
-	 * that userspace sees the changes. We need i_sem and so we could
+	 * that userspace sees the changes. We need i_mutex and so we could
 	 * not do it inside dqonoff_sem. Moreover we need to be carefull
 	 * about races with quotaoff() (that is the reason why we have own
 	 * reference to inode). */
@ -184,9 +184,9 @@ static void quota_sync_sb(struct super_block *sb, int type)
 	up(&sb_dqopt(sb)->dqonoff_sem);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (discard[cnt]) {
-			down(&discard[cnt]->i_sem);
+			mutex_lock(&discard[cnt]->i_mutex);
 			truncate_inode_pages(&discard[cnt]->i_data, 0);
-			up(&discard[cnt]->i_sem);
+			mutex_unlock(&discard[cnt]->i_mutex);
 			iput(discard[cnt]);
 		}
 	}
--- a/fs/read_write.c
+++ b/fs/read_write.c
@ -33,7 +33,7 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
 	long long retval;
 	struct inode *inode = file->f_mapping->host;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	switch (origin) {
 		case 2:
 			offset += inode->i_size;
@ -49,7 +49,7 @@ loff_t generic_file_llseek(struct file *file, loff_t offset, int origin)
 		}
 		retval = offset;
 	}
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return retval;
 }

--- a/fs/readdir.c
+++ b/fs/readdir.c
@ -30,13 +30,13 @@ int vfs_readdir(struct file *file, filldir_t filler, void *buf)
 	if (res)
 		goto out;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	res = -ENOENT;
 	if (!IS_DEADDIR(inode)) {
 		res = file->f_op->readdir(file, buf, filler);
 		file_accessed(file);
 	}
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 out:
 	return res;
 }
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@ -49,7 +49,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
 	}

 	reiserfs_write_lock(inode->i_sb);
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	/* freeing preallocation only involves relogging blocks that
 	 * are already in the current transaction.  preallocation gets
 	 * freed at the end of each transaction, so it is impossible for
@ -100,7 +100,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
 		err = reiserfs_truncate_file(inode, 0);
 	}
      out:
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	reiserfs_write_unlock(inode->i_sb);
 	return err;
 }
@ -1342,7 +1342,7 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
 	if (unlikely(!access_ok(VERIFY_READ, buf, count)))
 		return -EFAULT;

-	down(&inode->i_sem);	// locks the entire file for just us
+	mutex_lock(&inode->i_mutex);	// locks the entire file for just us

 	pos = *ppos;

@ -1532,12 +1532,12 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
 		    generic_osync_inode(inode, file->f_mapping,
 					OSYNC_METADATA | OSYNC_DATA);

-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	reiserfs_async_progress_wait(inode->i_sb);
 	return (already_written != 0) ? already_written : res;

      out:
-	up(&inode->i_sem);	// unlock the file on exit.
+	mutex_unlock(&inode->i_mutex);	// unlock the file on exit.
 	return res;
 }

--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@ -40,12 +40,12 @@ void reiserfs_delete_inode(struct inode *inode)

 	/* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
 	if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {	/* also handles bad_inode case */
-		down(&inode->i_sem);
+		mutex_lock(&inode->i_mutex);

 		reiserfs_delete_xattrs(inode);

 		if (journal_begin(&th, inode->i_sb, jbegin_count)) {
-			up(&inode->i_sem);
+			mutex_unlock(&inode->i_mutex);
 			goto out;
 		}
 		reiserfs_update_inode_transaction(inode);
@ -59,11 +59,11 @@ void reiserfs_delete_inode(struct inode *inode)
 			DQUOT_FREE_INODE(inode);

 		if (journal_end(&th, inode->i_sb, jbegin_count)) {
-			up(&inode->i_sem);
+			mutex_unlock(&inode->i_mutex);
 			goto out;
 		}

-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);

 		/* check return value from reiserfs_delete_object after
 		 * ending the transaction
@ -551,7 +551,7 @@ static int convert_tail_for_hole(struct inode *inode,

 	/* we don't have to make sure the conversion did not happen while
 	 ** we were locking the page because anyone that could convert
-	 ** must first take i_sem.
+	 ** must first take i_mutex.
 	 **
 	 ** We must fix the tail page for writing because it might have buffers
 	 ** that are mapped, but have a block number of 0.  This indicates tail
@ -586,7 +586,7 @@ static inline int _allocate_block(struct reiserfs_transaction_handle *th,
 	BUG_ON(!th->t_trans_id);

 #ifdef REISERFS_PREALLOCATE
-	if (!(flags & GET_BLOCK_NO_ISEM)) {
+	if (!(flags & GET_BLOCK_NO_IMUX)) {
 		return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
 						  path, block);
 	}
@ -2318,7 +2318,7 @@ static int map_block_for_writepage(struct inode *inode,
 	/* this is where we fill in holes in the file. */
 	if (use_get_block) {
 		retval = reiserfs_get_block(inode, block, bh_result,
-					    GET_BLOCK_CREATE | GET_BLOCK_NO_ISEM
+					    GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
 					    | GET_BLOCK_NO_DANGLE);
 		if (!retval) {
 			if (!buffer_mapped(bh_result)
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@ -120,7 +120,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
 	/* we need to make sure nobody is changing the file size beneath
 	 ** us
 	 */
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);

 	write_from = inode->i_size & (blocksize - 1);
 	/* if we are on a block boundary, we are already unpacked.  */
@ -156,7 +156,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
 	page_cache_release(page);

      out:
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	reiserfs_write_unlock(inode->i_sb);
 	return retval;
 }
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@ -2211,7 +2211,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
 	size_t towrite = len;
 	struct buffer_head tmp_bh, *bh;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	while (towrite > 0) {
 		tocopy = sb->s_blocksize - offset < towrite ?
 		    sb->s_blocksize - offset : towrite;
@ -2250,7 +2250,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 	mark_inode_dirty(inode);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return len - towrite;
 }

--- a/fs/reiserfs/tail_conversion.c
+++ b/fs/reiserfs/tail_conversion.c
@ -205,7 +205,7 @@ int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_in
 					 1) * p_s_sb->s_blocksize;
 	pos1 = pos;

-	// we are protected by i_sem. The tail can not disapper, not
+	// we are protected by i_mutex. The tail can not disapper, not
 	// append can be done either
 	// we are in truncate or packing tail in file_release

--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@ -67,11 +67,11 @@ static struct dentry *create_xa_root(struct super_block *sb)
 		goto out;
 	} else if (!xaroot->d_inode) {
 		int err;
-		down(&privroot->d_inode->i_sem);
+		mutex_lock(&privroot->d_inode->i_mutex);
 		err =
 		    privroot->d_inode->i_op->mkdir(privroot->d_inode, xaroot,
 						   0700);
-		up(&privroot->d_inode->i_sem);
+		mutex_unlock(&privroot->d_inode->i_mutex);

 		if (err) {
 			dput(xaroot);
@ -219,7 +219,7 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
 	} else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
 		goto out;
 	} else {
-		/* inode->i_sem is down, so nothing else can try to create
+		/* inode->i_mutex is down, so nothing else can try to create
 		 * the same xattr */
 		err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
 						   0700 | S_IFREG, NULL);
@ -268,7 +268,7 @@ static struct file *open_xa_file(const struct inode *inode, const char *name,
 * and don't mess with f->f_pos, but the idea is the same.  Do some
 * action on each and every entry in the directory.
 *
- * we're called with i_sem held, so there are no worries about the directory
+ * we're called with i_mutex held, so there are no worries about the directory
 * changing underneath us.
 */
 static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
@ -426,7 +426,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
 	int res = -ENOTDIR;
 	if (!file->f_op || !file->f_op->readdir)
 		goto out;
-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 //        down(&inode->i_zombie);
 	res = -ENOENT;
 	if (!IS_DEADDIR(inode)) {
@ -435,7 +435,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
 		unlock_kernel();
 	}
 //        up(&inode->i_zombie);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
      out:
 	return res;
 }
@ -480,7 +480,7 @@ static inline __u32 xattr_hash(const char *msg, int len)
 /* Generic extended attribute operations that can be used by xa plugins */

 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
 */
 int
 reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
@ -535,7 +535,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
 	/* Resize it so we're ok to write there */
 	newattrs.ia_size = buffer_size;
 	newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
-	down(&xinode->i_sem);
+	mutex_lock(&xinode->i_mutex);
 	err = notify_change(fp->f_dentry, &newattrs);
 	if (err)
 		goto out_filp;
@ -598,7 +598,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
 	}

      out_filp:
-	up(&xinode->i_sem);
+	mutex_unlock(&xinode->i_mutex);
 	fput(fp);

      out:
@ -606,7 +606,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
 }

 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
 */
 int
 reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
@ -793,7 +793,7 @@ reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,

 }

-/* This is called w/ inode->i_sem downed */
+/* This is called w/ inode->i_mutex downed */
 int reiserfs_delete_xattrs(struct inode *inode)
 {
 	struct file *fp;
@ -946,7 +946,7 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)

 /*
 * Inode operation getxattr()
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
 */
 ssize_t
 reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
@ -970,7 +970,7 @@ reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
 /*
 * Inode operation setxattr()
 *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
 */
 int
 reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
@ -1008,7 +1008,7 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 /*
 * Inode operation removexattr()
 *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
 */
 int reiserfs_removexattr(struct dentry *dentry, const char *name)
 {
@ -1091,7 +1091,7 @@ reiserfs_listxattr_filler(void *buf, const char *name, int namelen,
 /*
 * Inode operation listxattr()
 *
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
 */
 ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
 {
@ -1289,9 +1289,9 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags)
 		if (!IS_ERR(dentry)) {
 			if (!(mount_flags & MS_RDONLY) && !dentry->d_inode) {
 				struct inode *inode = dentry->d_parent->d_inode;
-				down(&inode->i_sem);
+				mutex_lock(&inode->i_mutex);
 				err = inode->i_op->mkdir(inode, dentry, 0700);
-				up(&inode->i_sem);
+				mutex_unlock(&inode->i_mutex);
 				if (err) {
 					dput(dentry);
 					dentry = NULL;
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@ -174,7 +174,7 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 /*
 * Inode operation get_posix_acl().
 *
- * inode->i_sem: down
+ * inode->i_mutex: down
 * BKL held [before 2.5.x]
 */
 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
@ -237,7 +237,7 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
 /*
 * Inode operation set_posix_acl().
 *
- * inode->i_sem: down
+ * inode->i_mutex: down
 * BKL held [before 2.5.x]
 */
 static int
@ -312,7 +312,7 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
 	return error;
 }

-/* dir->i_sem: down,
+/* dir->i_mutex: locked,
 * inode is new and not released into the wild yet */
 int
 reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,
--- a/fs/relayfs/inode.c
+++ b/fs/relayfs/inode.c
@ -109,7 +109,7 @@ static struct dentry *relayfs_create_entry(const char *name,
 	}

 	parent = dget(parent);
-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	d = lookup_one_len(name, parent, strlen(name));
 	if (IS_ERR(d)) {
 		d = NULL;
@ -139,7 +139,7 @@ static struct dentry *relayfs_create_entry(const char *name,
 	simple_release_fs(&relayfs_mount, &relayfs_mount_count);

 exit:
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 	dput(parent);
 	return d;
 }
@ -204,7 +204,7 @@ int relayfs_remove(struct dentry *dentry)
 		return -EINVAL;

 	parent = dget(parent);
-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	if (dentry->d_inode) {
 		if (S_ISDIR(dentry->d_inode->i_mode))
 			error = simple_rmdir(parent->d_inode, dentry);
@ -215,7 +215,7 @@ int relayfs_remove(struct dentry *dentry)
 	}
 	if (!error)
 		dput(dentry);
-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 	dput(parent);

 	if (!error)
@ -476,7 +476,7 @@ static ssize_t relay_file_read(struct file *filp,
 	ssize_t ret = 0;
 	void *from;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	if(!relay_file_read_avail(buf, *ppos))
 		goto out;

@ -494,7 +494,7 @@ static ssize_t relay_file_read(struct file *filp,
 	relay_file_read_consume(buf, read_start, count);
 	*ppos = relay_file_read_end_pos(buf, read_start, count);
 out:
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return ret;
 }

--- a/fs/super.c
+++ b/fs/super.c
@ -72,7 +72,7 @@ static struct super_block *alloc_super(void)
 		INIT_HLIST_HEAD(&s->s_anon);
 		INIT_LIST_HEAD(&s->s_inodes);
 		init_rwsem(&s->s_umount);
-		sema_init(&s->s_lock, 1);
+		mutex_init(&s->s_lock);
 		down_write(&s->s_umount);
 		s->s_count = S_BIAS;
 		atomic_set(&s->s_active, 1);
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@ -99,7 +99,7 @@ static int create_dir(struct kobject * k, struct dentry * p,
 	int error;
 	umode_t mode = S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO;

-	down(&p->d_inode->i_sem);
+	mutex_lock(&p->d_inode->i_mutex);
 	*d = lookup_one_len(n, p, strlen(n));
 	if (!IS_ERR(*d)) {
 		error = sysfs_make_dirent(p->d_fsdata, *d, k, mode, SYSFS_DIR);
@ -122,7 +122,7 @@ static int create_dir(struct kobject * k, struct dentry * p,
 		dput(*d);
 	} else
 		error = PTR_ERR(*d);
-	up(&p->d_inode->i_sem);
+	mutex_unlock(&p->d_inode->i_mutex);
 	return error;
 }

@ -246,7 +246,7 @@ static void remove_dir(struct dentry * d)
 	struct dentry * parent = dget(d->d_parent);
 	struct sysfs_dirent * sd;

-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);
 	d_delete(d);
 	sd = d->d_fsdata;
 	list_del_init(&sd->s_sibling);
@ -257,7 +257,7 @@ static void remove_dir(struct dentry * d)
 	pr_debug(" o %s removing done (%d)\n",d->d_name.name,
 		 atomic_read(&d->d_count));

-	up(&parent->d_inode->i_sem);
+	mutex_unlock(&parent->d_inode->i_mutex);
 	dput(parent);
 }

@ -286,7 +286,7 @@ void sysfs_remove_dir(struct kobject * kobj)
 		return;

 	pr_debug("sysfs %s: removing dir\n",dentry->d_name.name);
-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	parent_sd = dentry->d_fsdata;
 	list_for_each_entry_safe(sd, tmp, &parent_sd->s_children, s_sibling) {
 		if (!sd->s_element || !(sd->s_type & SYSFS_NOT_PINNED))
@ -295,7 +295,7 @@ void sysfs_remove_dir(struct kobject * kobj)
 		sysfs_drop_dentry(sd, dentry);
 		sysfs_put(sd);
 	}
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	remove_dir(dentry);
 	/**
@ -318,7 +318,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
 	down_write(&sysfs_rename_sem);
 	parent = kobj->parent->dentry;

-	down(&parent->d_inode->i_sem);
+	mutex_lock(&parent->d_inode->i_mutex);

 	new_dentry = lookup_one_len(new_name, parent, strlen(new_name));
 	if (!IS_ERR(new_dentry)) {
@ -334,7 +334,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
 			error = -EEXIST;
 		dput(new_dentry);
 	}
-	up(&parent->d_inode->i_sem);	
+	mutex_unlock(&parent->d_inode->i_mutex);
 	up_write(&sysfs_rename_sem);

 	return error;
@ -345,9 +345,9 @@ static int sysfs_dir_open(struct inode *inode, struct file *file)
 	struct dentry * dentry = file->f_dentry;
 	struct sysfs_dirent * parent_sd = dentry->d_fsdata;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	file->private_data = sysfs_new_dirent(parent_sd, NULL);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	return file->private_data ? 0 : -ENOMEM;

@ -358,9 +358,9 @@ static int sysfs_dir_close(struct inode *inode, struct file *file)
 	struct dentry * dentry = file->f_dentry;
 	struct sysfs_dirent * cursor = file->private_data;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	list_del_init(&cursor->s_sibling);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);

 	release_sysfs_dirent(cursor);

@ -436,7 +436,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 {
 	struct dentry * dentry = file->f_dentry;

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	switch (origin) {
 		case 1:
 			offset += file->f_pos;
@ -444,7 +444,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 			if (offset >= 0)
 				break;
 		default:
-			up(&file->f_dentry->d_inode->i_sem);
+			mutex_unlock(&file->f_dentry->d_inode->i_mutex);
 			return -EINVAL;
 	}
 	if (offset != file->f_pos) {
@ -468,7 +468,7 @@ static loff_t sysfs_dir_lseek(struct file * file, loff_t offset, int origin)
 			list_add_tail(&cursor->s_sibling, p);
 		}
 	}
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 	return offset;
 }

@ -483,4 +483,3 @@ struct file_operations sysfs_dir_operations = {
 EXPORT_SYMBOL_GPL(sysfs_create_dir);
 EXPORT_SYMBOL_GPL(sysfs_remove_dir);
 EXPORT_SYMBOL_GPL(sysfs_rename_dir);
-
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@ -364,9 +364,9 @@ int sysfs_add_file(struct dentry * dir, const struct attribute * attr, int type)
 	umode_t mode = (attr->mode & S_IALLUGO) | S_IFREG;
 	int error = 0;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	error = sysfs_make_dirent(parent_sd, NULL, (void *) attr, mode, type);
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);

 	return error;
 }
@ -398,7 +398,7 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
 	struct dentry * victim;
 	int res = -ENOENT;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	victim = lookup_one_len(attr->name, dir, strlen(attr->name));
 	if (!IS_ERR(victim)) {
 		/* make sure dentry is really there */
@ -420,7 +420,7 @@ int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
 		 */
 		dput(victim);
 	}
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);

 	return res;
 }
@ -441,22 +441,22 @@ int sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode)
 	struct iattr newattrs;
 	int res = -ENOENT;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	victim = lookup_one_len(attr->name, dir, strlen(attr->name));
 	if (!IS_ERR(victim)) {
 		if (victim->d_inode &&
 		    (victim->d_parent->d_inode == dir->d_inode)) {
 			inode = victim->d_inode;
-			down(&inode->i_sem);
+			mutex_lock(&inode->i_mutex);
 			newattrs.ia_mode = (mode & S_IALLUGO) |
 						(inode->i_mode & ~S_IALLUGO);
 			newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
 			res = notify_change(victim, &newattrs);
-			up(&inode->i_sem);
+			mutex_unlock(&inode->i_mutex);
 		}
 		dput(victim);
 	}
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);

 	return res;
 }
@ -480,4 +480,3 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
 EXPORT_SYMBOL_GPL(sysfs_create_file);
 EXPORT_SYMBOL_GPL(sysfs_remove_file);
 EXPORT_SYMBOL_GPL(sysfs_update_file);
-
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@ -201,7 +201,7 @@ const unsigned char * sysfs_get_name(struct sysfs_dirent *sd)

 /*
 * Unhashes the dentry corresponding to given sysfs_dirent
- * Called with parent inode's i_sem held.
+ * Called with parent inode's i_mutex held.
 */
 void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
 {
@ -232,7 +232,7 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name)
 		/* no inode means this hasn't been made visible yet */
 		return;

-	down(&dir->d_inode->i_sem);
+	mutex_lock(&dir->d_inode->i_mutex);
 	list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
 		if (!sd->s_element)
 			continue;
@ -243,7 +243,5 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name)
 			break;
 		}
 	}
-	up(&dir->d_inode->i_sem);
+	mutex_unlock(&dir->d_inode->i_mutex);
 }
-
-
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@ -86,9 +86,9 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char

 	BUG_ON(!kobj || !kobj->dentry || !name);

-	down(&dentry->d_inode->i_sem);
+	mutex_lock(&dentry->d_inode->i_mutex);
 	error = sysfs_add_link(dentry, name, target);
-	up(&dentry->d_inode->i_sem);
+	mutex_unlock(&dentry->d_inode->i_mutex);
 	return error;
 }

@ -177,4 +177,3 @@ struct inode_operations sysfs_symlink_inode_operations = {

 EXPORT_SYMBOL_GPL(sysfs_create_link);
 EXPORT_SYMBOL_GPL(sysfs_remove_link);
-
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@ -1275,7 +1275,7 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
 	size_t towrite = len;
 	struct buffer_head *bh;

-	down(&inode->i_sem);
+	mutex_lock(&inode->i_mutex);
 	while (towrite > 0) {
 		tocopy = sb->s_blocksize - offset < towrite ?
 				sb->s_blocksize - offset : towrite;
@ -1297,7 +1297,7 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
 	}
 out:
 	if (len == towrite) {
-		up(&inode->i_sem);
+		mutex_unlock(&inode->i_mutex);
 		return err;
 	}
 	if (inode->i_size < off+len-towrite)
@ -1305,7 +1305,7 @@ static ssize_t ufs_quota_write(struct super_block *sb, int type,
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
 	mark_inode_dirty(inode);
-	up(&inode->i_sem);
+	mutex_unlock(&inode->i_mutex);
 	return len - towrite;
 }

--- a/fs/xattr.c
+++ b/fs/xattr.c
@ -51,7 +51,7 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
 		}
 	}

-	down(&d->d_inode->i_sem);
+	mutex_lock(&d->d_inode->i_mutex);
 	error = security_inode_setxattr(d, kname, kvalue, size, flags);
 	if (error)
 		goto out;
@ -73,7 +73,7 @@ setxattr(struct dentry *d, char __user *name, void __user *value,
 			fsnotify_xattr(d);
 	}
 out:
-	up(&d->d_inode->i_sem);
+	mutex_unlock(&d->d_inode->i_mutex);
 	kfree(kvalue);
 	return error;
 }
@ -323,9 +323,9 @@ removexattr(struct dentry *d, char __user *name)
 		error = security_inode_removexattr(d, kname);
 		if (error)
 			goto out;
-		down(&d->d_inode->i_sem);
+		mutex_lock(&d->d_inode->i_mutex);
 		error = d->d_inode->i_op->removexattr(d, kname);
-		up(&d->d_inode->i_sem);
+		mutex_unlock(&d->d_inode->i_mutex);
 		if (!error)
 			fsnotify_xattr(d);
 	}
--- a/fs/xfs/linux-2.6/mutex.h
+++ b/fs/xfs/linux-2.6/mutex.h
@ -19,7 +19,7 @@
 #define __XFS_SUPPORT_MUTEX_H__

 #include <linux/spinlock.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>

 /*
 * Map the mutex'es from IRIX to Linux semaphores.
@ -28,12 +28,8 @@
 * callers.
 */
 #define MUTEX_DEFAULT		0x0
-typedef struct semaphore	mutex_t;

-#define mutex_init(lock, type, name)		sema_init(lock, 1)
-#define mutex_destroy(lock)			sema_init(lock, -99)
-#define mutex_lock(lock, num)			down(lock)
-#define mutex_trylock(lock)			(down_trylock(lock) ? 0 : 1)
-#define mutex_unlock(lock)			up(lock)
+typedef struct mutex		mutex_t;
+//#define mutex_destroy(lock)			do{}while(0)

 #endif /* __XFS_SUPPORT_MUTEX_H__ */
--- a/Show more
+++ b/Show more