linux-kernel - [PATCH] rbd: Use kmem_cache

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Message-ID: <20140722181130.GA3278@himangi-Dell>
Date:	Tue, 22 Jul 2014 23:41:30 +0530
From:	Himangi Saraogi <himangi774@...il.com>
To:	Yehuda Sadeh <yehuda@...tank.com>, Sage Weil <sage@...tank.com>,
	Alex Elder <elder@...nel.org>, ceph-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] rbd: Use kmem_cache_free

Free memory allocated using kmem_cache_zalloc using kmem_cache_free
rather than kfree.

The Coccinelle semantic patch that makes this change is as follows:

// <smpl>
@@
expression x,E,c;
@@

 x = \(kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\)(c,...)
 ... when != x = E
     when != &x
?-kfree(x)
+kmem_cache_free(c,x)
// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@...il.com>
Acked-by: Julia Lawall <julia.lawall@...6.fr>
---
 drivers/block/rbd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b2c98c1..8381c54 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1158,7 +1158,7 @@ static const char *rbd_segment_name(struct rbd_device *rbd_dev, u64 offset)
 	if (ret < 0 || ret > CEPH_MAX_OID_NAME_LEN) {
 		pr_err("error formatting segment name for #%llu (%d)\n",
 			segment, ret);
-		kfree(name);
+		kmem_cache_free(rbd_segment_name_cache, name);
 		name = NULL;
 	}
 
-- 
1.9.1

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