whack-a-mole: cropped up open-coded file_inode() uses...

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Merge tag 'pull-file_inode' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull file_inode() updates from Al Vrio:
 "whack-a-mole: cropped up open-coded file_inode() uses..."

* tag 'pull-file_inode' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  orangefs: use ->f_mapping
  _nfs42_proc_copy(): use ->f_mapping instead of file_inode()->i_mapping
  dma_buf: no need to bother with file_inode()->i_mapping
  nfs_finish_open(): don't open-code file_inode()
  bprm_fill_uid(): don't open-code file_inode()
  sgx: use ->f_mapping...
  exfat_iterate(): don't open-code file_inode(file)
  ibmvmc: don't open-code file_inode()

arch/x86/kernel/cpu/sgx/encl.c

@@ -912,8 +912,7 @@ const cpumask_t *sgx_encl_cpumask(struct sgx_encl *encl)
 static struct page *sgx_encl_get_backing_page(struct sgx_encl *encl,
 					      pgoff_t index)
 {
-	struct inode *inode = encl->backing->f_path.dentry->d_inode;
-	struct address_space *mapping = inode->i_mapping;
+	struct address_space *mapping = encl->backing->f_mapping;
 	gfp_t gfpmask = mapping_gfp_mask(mapping);
 
 	return shmem_read_mapping_page_gfp(mapping, index, gfpmask);

drivers/dma-buf/udmabuf.c

@@ -213,7 +213,7 @@ static long udmabuf_create(struct miscdevice *device,
 		memfd = fget(list[i].memfd);
 		if (!memfd)
 			goto err;
-		mapping = file_inode(memfd)->i_mapping;
+		mapping = memfd->f_mapping;
 		if (!shmem_mapping(mapping) && !is_file_hugepages(memfd))
 			goto err;
 		seals = memfd_fcntl(memfd, F_GET_SEALS, 0);

drivers/misc/ibmvmc.c

@@ -1039,6 +1039,7 @@ static unsigned int ibmvmc_poll(struct file *file, poll_table *wait)
 static ssize_t ibmvmc_write(struct file *file, const char *buffer,
 			    size_t count, loff_t *ppos)
 {
+	struct inode *inode;
 	struct ibmvmc_buffer *vmc_buffer;
 	struct ibmvmc_file_session *session;
 	struct crq_server_adapter *adapter;
@@ -1122,8 +1123,9 @@ static ssize_t ibmvmc_write(struct file *file, const char *buffer,
 	if (p == buffer)
 		goto out;
 
-	file->f_path.dentry->d_inode->i_mtime = current_time(file_inode(file));
-	mark_inode_dirty(file->f_path.dentry->d_inode);
+	inode = file_inode(file);
+	inode->i_mtime = current_time(inode);
+	mark_inode_dirty(inode);
 
 	dev_dbg(adapter->dev, "write: file = 0x%lx, count = 0x%lx\n",
 		(unsigned long)file, (unsigned long)count);

fs/exec.c

@@ -1587,7 +1587,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
 {
 	/* Handle suid and sgid on files */
 	struct user_namespace *mnt_userns;
-	struct inode *inode;
+	struct inode *inode = file_inode(file);
 	unsigned int mode;
 	kuid_t uid;
 	kgid_t gid;
@@ -1598,7 +1598,6 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
 	if (task_no_new_privs(current))
 		return;
 
-	inode = file->f_path.dentry->d_inode;
 	mode = READ_ONCE(inode->i_mode);
 	if (!(mode & (S_ISUID|S_ISGID)))
 		return;

fs/exfat/dir.c

@@ -212,9 +212,9 @@ static void exfat_free_namebuf(struct exfat_dentry_namebuf *nb)
 
 /* skip iterating emit_dots when dir is empty */
 #define ITER_POS_FILLED_DOTS    (2)
-static int exfat_iterate(struct file *filp, struct dir_context *ctx)
+static int exfat_iterate(struct file *file, struct dir_context *ctx)
 {
-	struct inode *inode = filp->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	struct super_block *sb = inode->i_sb;
 	struct inode *tmp;
 	struct exfat_dir_entry de;
@@ -228,7 +228,7 @@ static int exfat_iterate(struct file *filp, struct dir_context *ctx)
 	mutex_lock(&EXFAT_SB(sb)->s_lock);
 
 	cpos = ctx->pos;
-	if (!dir_emit_dots(filp, ctx))
+	if (!dir_emit_dots(file, ctx))
 		goto unlock;
 
 	if (ctx->pos == ITER_POS_FILLED_DOTS) {

fs/nfs/dir.c

@@ -2022,7 +2022,7 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
 	err = finish_open(file, dentry, do_open);
 	if (err)
 		goto out;
-	if (S_ISREG(file->f_path.dentry->d_inode->i_mode))
+	if (S_ISREG(file_inode(file)->i_mode))
 		nfs_file_set_open_context(file, ctx);
 	else
 		err = -EOPENSTALE;

fs/nfs/nfs42proc.c

@@ -341,7 +341,7 @@ static ssize_t _nfs42_proc_copy(struct file *src,
 			return status;
 		}
 	}
-	status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
+	status = nfs_filemap_write_and_wait_range(src->f_mapping,
 			pos_src, pos_src + (loff_t)count - 1);
 	if (status)
 		return status;

fs/orangefs/file.c

@@ -417,9 +417,7 @@ static int orangefs_file_release(struct inode *inode, struct file *file)
 	 * readahead cache (if any); this forces an expensive refresh of
 	 * data for the next caller of mmap (or 'get_block' accesses)
 	 */
-	if (file_inode(file) &&
-	    file_inode(file)->i_mapping &&
-	    mapping_nrpages(&file_inode(file)->i_data)) {
+	if (mapping_nrpages(file->f_mapping)) {
 		if (orangefs_features & ORANGEFS_FEATURE_READAHEAD) {
 			gossip_debug(GOSSIP_INODE_DEBUG,
 			    "calling flush_racache on %pU\n",