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[IA64] sem2mutex: arch/ia64/ia32/sys_ia32.c 

Migrate arch/ia64/ia32/sys_ia32 to using a mutex for mmap protection.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Jes Sorensen 2006-01-18 23:46:51 -08:00 committed by Tony Luck
parent 4b16bfbf8f
commit 92ff2ecd0d
1 changed files with 12 additions and 16 deletions
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28
arch/ia64/ia32/sys_ia32.c
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@ -52,9 +52,9 @@
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/mman.h>
#include <linux/mutex.h>
#include <asm/intrinsics.h>
#include <asm/semaphore.h>
#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@ -86,7 +86,7 @@
* while doing so.
*/
/* XXX make per-mm: */
static DECLARE_MUTEX(ia32_mmap_sem);
static DEFINE_MUTEX(ia32_mmap_mutex);
asmlinkage long
sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp,
@ -895,11 +895,11 @@ ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot
prot = get_prot32(prot);
#if PAGE_SHIFT > IA32_PAGE_SHIFT
down(&ia32_mmap_sem);
mutex_lock(&ia32_mmap_mutex);
{
addr = emulate_mmap(file, addr, len, prot, flags, offset);
}
up(&ia32_mmap_sem);
mutex_unlock(&ia32_mmap_mutex);
#else
down_write(&current->mm->mmap_sem);
{
@ -1000,11 +1000,9 @@ sys32_munmap (unsigned int start, unsigned int len)
if (start >= end)
return 0;
down(&ia32_mmap_sem);
{
ret = sys_munmap(start, end - start);
}
up(&ia32_mmap_sem);
mutex_lock(&ia32_mmap_mutex);
ret = sys_munmap(start, end - start);
mutex_unlock(&ia32_mmap_mutex);
#endif
return ret;
}
@ -1056,7 +1054,7 @@ sys32_mprotect (unsigned int start, unsigned int len, int prot)
if (retval < 0)
return retval;
down(&ia32_mmap_sem);
mutex_lock(&ia32_mmap_mutex);
{
if (offset_in_page(start)) {
/* start address is 4KB aligned but not page aligned. */
@ -1080,7 +1078,7 @@ sys32_mprotect (unsigned int start, unsigned int len, int prot)
retval = sys_mprotect(start, end - start, prot);
}
out:
up(&ia32_mmap_sem);
mutex_unlock(&ia32_mmap_mutex);
return retval;
#endif
}
@ -1124,11 +1122,9 @@ sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
old_len = PAGE_ALIGN(old_end) - addr;
new_len = PAGE_ALIGN(new_end) - addr;
down(&ia32_mmap_sem);
{
ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
}
up(&ia32_mmap_sem);
mutex_lock(&ia32_mmap_mutex);
ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
mutex_unlock(&ia32_mmap_mutex);
if ((ret >= 0) && (old_len < new_len)) {
/* mremap expanded successfully */