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[PATCH] mmput() might sleep

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exit_aio() and exit_mmap() can sleep.  But it's easy to accidentally call
mmput() from inside locks.

Cc: Dave Peterson <dsp@llnl.gov>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2006-06-23 02:05:15 -07:00 committed by Linus Torvalds
parent 32797f976d
commit 0ae26f1b31
1 changed files with 2 additions and 0 deletions
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kernel/fork.c
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@ -368,6 +368,8 @@ void fastcall __mmdrop(struct mm_struct *mm)
*/ */
void mmput(struct mm_struct *mm) void mmput(struct mm_struct *mm)
{ {
might_sleep();
if (atomic_dec_and_test(&mm->mm_users)) { if (atomic_dec_and_test(&mm->mm_users)) {
exit_aio(mm); exit_aio(mm);
exit_mmap(mm); exit_mmap(mm);