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@lip6.fr>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 128e7df..8f3dcb6 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5663,10 +5663,8 @@ 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;