[PATCHv4 08/11] xfs: Use *_dec_not_zero instead of *_add_unless

[Sven Eckelmann]

atomic_dec_not_zero is defined for each architecture through
<linux/atomic.h> to provide the functionality of
atomic_add_unless(x, -1, 0).

Signed-off-by: Sven Eckelmann <sven at narfation.org>
Cc: Alex Elder <aelder at sgi.com>
Cc: xfs-masters at oss.sgi.com
Cc: xfs at oss.sgi.com
---
 fs/xfs/linux-2.6/xfs_buf.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index b2b4119..a68d9bf 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1429,7 +1429,7 @@ xfs_buftarg_shrink(
 		 * zero. If the value is already zero, we need to reclaim the
 		 * buffer, otherwise it gets another trip through the LRU.
 		 */
-		if (!atomic_add_unless(&bp->b_lru_ref, -1, 0)) {
+		if (!atomic_dec_not_zero(&bp->b_lru_ref)) {
 			list_move_tail(&bp->b_lru, &btp->bt_lru);
 			continue;
 		}
-- 
1.7.5.4