mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
[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:
parent
4b16bfbf8f
commit
92ff2ecd0d
1 changed files with 12 additions and 16 deletions
|
@ -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(¤t->mm->mmap_sem);
|
||||
{
|
||||
|
@ -1000,11 +1000,9 @@ sys32_munmap (unsigned int start, unsigned int len)
|
|||
if (start >= end)
|
||||
return 0;
|
||||
|
||||
down(&ia32_mmap_sem);
|
||||
{
|
||||
mutex_lock(&ia32_mmap_mutex);
|
||||
ret = sys_munmap(start, end - start);
|
||||
}
|
||||
up(&ia32_mmap_sem);
|
||||
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);
|
||||
{
|
||||
mutex_lock(&ia32_mmap_mutex);
|
||||
ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
|
||||
}
|
||||
up(&ia32_mmap_sem);
|
||||
mutex_unlock(&ia32_mmap_mutex);
|
||||
|
||||
if ((ret >= 0) && (old_len < new_len)) {
|
||||
/* mremap expanded successfully */
|
||||
|
|
Loading…
Reference in a new issue