linux-kernel - [PATCH 33/39] rbd: drop null test before destroy functions

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Message-Id: <1442146532-9100-34-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sun, 13 Sep 2015 14:15:26 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Ilya Dryomov <idryomov@...il.com>
Cc:	sergey.senozhatsky@...il.com, kernel-janitors@...r.kernel.org,
	Sage Weil <sage@...hat.com>, Alex Elder <elder@...nel.org>,
	ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 33/39] rbd: drop null test before destroy functions

Remove unneeded NULL test.

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

// <smpl>
@@ expression x; @@
-if (x != NULL) {
  \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x);
  x = NULL;
-}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/block/rbd.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d93a037..0507246 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5645,10 +5645,8 @@ static int rbd_slab_init(void)
 	if (rbd_segment_name_cache)
 		return 0;
 out_err:
-	if (rbd_obj_request_cache) {
-		kmem_cache_destroy(rbd_obj_request_cache);
-		rbd_obj_request_cache = NULL;
-	}
+	kmem_cache_destroy(rbd_obj_request_cache);
+	rbd_obj_request_cache = NULL;
 
 	kmem_cache_destroy(rbd_img_request_cache);
 	rbd_img_request_cache = NULL;

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