linux-kernel - [PATCH 14/14] xfs: use atomic_dec_not

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Date:   Mon, 30 Jan 2017 19:48:44 +0100
From:   Fabian Frederick <fabf@...net.be>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, darrick.wong@...cle.com,
        linux-xfs@...r.kernel.org, Fabian Frederick <fabf@...net.be>
Subject: [PATCH 14/14] xfs: use atomic_dec_not_zero()

instead of atomic_add_unless(value, -1, 0)

Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 fs/xfs/xfs_buf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index ac3b4db..51b2167 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1684,7 +1684,7 @@ xfs_buftarg_isolate(
 	 * 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)) {
 		spin_unlock(&bp->b_lock);
 		return LRU_ROTATE;
 	}
-- 
2.9.3