* [PATCH] powerpc: fix idr locking in init_new_context
@ 2006-06-27 12:46 Sonny Rao
0 siblings, 0 replies; only message in thread
From: Sonny Rao @ 2006-06-27 12:46 UTC (permalink / raw)
To: paulus; +Cc: linuxppc-dev, linux-kernel, anton
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>
--- a/arch/powerpc/mm/mmu_context_64.c
+++ b/arch/powerpc/mm/mmu_context_64.c
@@ -44,7 +44,9 @@ again:
return err;
if (index > MAX_CONTEXT) {
+ spin_lock(&mmu_context_lock);
idr_remove(&mmu_context_idr, index);
+ spin_unlock(&mmu_context_lock);
return -ENOMEM;
}
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2006-06-27 12:46 [PATCH] powerpc: fix idr locking in init_new_context Sonny Rao
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