From: Peter Senna Tschudin <peter.senna@gmail.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/9] block/blk-tag.c: Remove useless kfree
Date: Wed, 12 Sep 2012 17:06:40 +0200 [thread overview]
Message-ID: <1347462407-13499-2-git-send-email-peter.senna@gmail.com> (raw)
From: Peter Senna Tschudin <peter.senna@gmail.com>
Remove useless kfree() and clean up code related to the removal.
The semantic patch that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
position p1,p2;
expression x;
@@
if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; }
@unchanged exists@
position r.p1,r.p2;
expression e <= r.x,x,e1;
iterator I;
statement S;
@@
if (x@p1 == NULL) { ... when != I(x,...) S
when != e = e1
when != e += e1
when != e -= e1
when != ++e
when != --e
when != e++
when != e--
when != &e
kfree@p2(x); ... return ...; }
@ok depends on unchanged exists@
position any r.p1;
position r.p2;
expression x;
@@
... when != true x@p1 == NULL
kfree@p2(x);
@depends on !ok && unchanged@
position r.p2;
expression x;
@@
*kfree@p2(x);
// </smpl>
Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
---
block/blk-tag.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/block/blk-tag.c b/block/blk-tag.c
index 4af6f5c..cc345e1 100644
--- a/block/blk-tag.c
+++ b/block/blk-tag.c
@@ -186,7 +186,8 @@ int blk_queue_init_tags(struct request_queue *q, int depth,
tags = __blk_queue_init_tags(q, depth);
if (!tags)
- goto fail;
+ return -ENOMEM;
+
} else if (q->queue_tags) {
rc = blk_queue_resize_tags(q, depth);
if (rc)
@@ -203,9 +204,6 @@ int blk_queue_init_tags(struct request_queue *q, int depth,
queue_flag_set_unlocked(QUEUE_FLAG_QUEUED, q);
INIT_LIST_HEAD(&q->tag_busy_list);
return 0;
-fail:
- kfree(tags);
- return -ENOMEM;
}
EXPORT_SYMBOL(blk_queue_init_tags);
next reply other threads:[~2012-09-12 15:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 15:06 Peter Senna Tschudin [this message]
2012-09-12 20:24 ` [PATCH 2/9] block/blk-tag.c: Remove useless kfree Jens Axboe
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