linux-kernel - [PATCH 08/20] xfs: xfs_buf: drop useless LIST

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Date:   Sun, 23 Dec 2018 09:57:03 +0100
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>
Cc:     kernel-janitors@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 08/20] xfs: xfs_buf: drop useless LIST_HEAD

Drop LIST_HEAD where the variable it declares has never
been used.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier x;
@@
- LIST_HEAD(x);
  ... when != x
// </smpl>

Fixes: 26f1fe858f274 ("xfs: reduce lock hold times in buffer writeback")
Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
Successfully 0-day tested on 151 configurations.

 fs/xfs/xfs_buf.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index b21ea2ba768d..eedc5e0156ff 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -1992,7 +1992,6 @@ xfs_buf_delwri_submit_buffers(
 	struct list_head	*wait_list)
 {
 	struct xfs_buf		*bp, *n;
-	LIST_HEAD		(submit_list);
 	int			pinned = 0;
 	struct blk_plug		plug;