[PATCH] block: elevator: remove unneeded null check in elv_register()

[John Pittman]

Since commit 3942d2991852 ("mm/slab_common: allow NULL cache
pointer in kmem_cache_destroy()"), the kmem_cache_destroy()
function has been able to handle null pointers.  Remove NULL
check against e->icq_cache in elv_register(), simplifying the code.

Signed-off-by: John Pittman <jpitt...@redhat.com>
---
 block/elevator.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/block/elevator.c b/block/elevator.c
index 5ea6e7d600e4..6a06b5d040e5 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -895,8 +895,7 @@ int elv_register(struct elevator_type *e)
        spin_lock(&elv_list_lock);
        if (elevator_find(e->elevator_name, e->uses_mq)) {
                spin_unlock(&elv_list_lock);
-               if (e->icq_cache)
-                       kmem_cache_destroy(e->icq_cache);
+               kmem_cache_destroy(e->icq_cache);
                return -EBUSY;
        }
        list_add_tail(&e->list, &elv_list);
-- 
2.17.1