The patch titled
buffer: memorder fix
has been added to the -mm tree. Its filename is
buffer-memorder-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: buffer: memorder fix
From: Nick Piggin <npiggin@xxxxxxx>
unlock_buffer(), like unlock_page(), must not clear the lock without
ensuring that the critical section is closed.
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/buffer.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/buffer.c~buffer-memorder-fix fs/buffer.c
--- a/fs/buffer.c~buffer-memorder-fix
+++ a/fs/buffer.c
@@ -70,6 +70,7 @@ EXPORT_SYMBOL(__lock_buffer);
void fastcall unlock_buffer(struct buffer_head *bh)
{
+ smp_mb__before_clear_bit();
clear_buffer_locked(bh);
smp_mb__after_clear_bit();
wake_up_bit(&bh->b_state, BH_Lock);
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
git-block.patch
buffer-memorder-fix.patch
sched-avoid-div-in-rebalance_tick.patch
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