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[POWERPC] Fix idr locking in init_new_context

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We always need to serialize accesses to mmu_context_idr.

I hit this bug when testing with a small number of mmu contexts.

Signed-off-by: Sonny Rao <sonny@burdell.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Sonny Rao 2006-06-27 08:46:09 -04:00 • committed by Paul Mackerras
parent 975b365895
commit f86c9747fe
1 changed files with 2 additions and 0 deletions
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arch/powerpc/mm/mmu_context_64.c
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@ -44,7 +44,9 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
return err;
if (index > MAX_CONTEXT) {
spin_lock(&mmu_context_lock);
idr_remove(&mmu_context_idr, index);
spin_unlock(&mmu_context_lock);
return -ENOMEM;
}