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authorNick Piggin <npiggin@suse.de>2008-10-18 23:27:00 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 11:52:32 -0400
commit51b07fc3c5c830bb49c80fc5eac041e1f66a72e7 (patch)
tree7d01d39f5eb5ac601d95c1e133492bd83135af6c /include/linux/buffer_head.h
parent8413ac9d8c9a1366a4f57880723126cd24e5a5c3 (diff)
fs: buffer lock use lock bitops
trylock_buffer and unlock_buffer open and close a critical section. Hence, we can use the lock bitops to get the desired memory ordering. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/buffer_head.h')
-rw-r--r--include/linux/buffer_head.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index eadaab44015f..3ce64b90118c 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -322,7 +322,7 @@ static inline void wait_on_buffer(struct buffer_head *bh)
322 322
323static inline int trylock_buffer(struct buffer_head *bh) 323static inline int trylock_buffer(struct buffer_head *bh)
324{ 324{
325 return likely(!test_and_set_bit(BH_Lock, &bh->b_state)); 325 return likely(!test_and_set_bit_lock(BH_Lock, &bh->b_state));
326} 326}
327 327
328static inline void lock_buffer(struct buffer_head *bh) 328static inline void lock_buffer(struct buffer_head *bh)