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drivers/block/drbd: remove the null check for kmem_cache_destroy

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kmem_cache_destroy has taken null pointer into account. So it is
safe to drop the null check before calling the function.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
zhong jiang 2018-08-08 23:22:47 +08:00 committed by Jens Axboe
parent 69daf897d7
commit a12fc00b23
1 changed files with 4 additions and 8 deletions
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12
drivers/block/drbd/drbd_main.c
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@ -2103,14 +2103,10 @@ static void drbd_destroy_mempools(void)
mempool_exit(&drbd_md_io_page_pool);
mempool_exit(&drbd_ee_mempool);
mempool_exit(&drbd_request_mempool);
if (drbd_ee_cache)
kmem_cache_destroy(drbd_ee_cache);
if (drbd_request_cache)
kmem_cache_destroy(drbd_request_cache);
if (drbd_bm_ext_cache)
kmem_cache_destroy(drbd_bm_ext_cache);
if (drbd_al_ext_cache)
kmem_cache_destroy(drbd_al_ext_cache);
kmem_cache_destroy(drbd_ee_cache);
kmem_cache_destroy(drbd_request_cache);
kmem_cache_destroy(drbd_bm_ext_cache);
kmem_cache_destroy(drbd_al_ext_cache);
drbd_ee_cache = NULL;
drbd_request_cache = NULL;