The patch titled
powerpc: fix idr locking in init_new_context
has been removed from the -mm tree. Its filename is
powerpc-fix-idr-locking-in-init_new_context.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: powerpc: fix idr locking in init_new_context
From: Sonny Rao <sonny@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/powerpc/mm/mmu_context_64.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN arch/powerpc/mm/mmu_context_64.c~powerpc-fix-idr-locking-in-init_new_context arch/powerpc/mm/mmu_context_64.c
--- a/arch/powerpc/mm/mmu_context_64.c~powerpc-fix-idr-locking-in-init_new_context
+++ a/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;
}
_
Patches currently in -mm which might be from sonny@xxxxxxxxxxx are
origin.patch
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