s390/dasd: remove unnecessary condition check

kmem_cache_destroy() can handle NULL pointer correctly, so there is
no need to check NULL pointer before calling kmem_cache_destroy().

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index a23e7d3..5e9ebdb 100644 (file)
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -3309,10 +3309,8 @@ dasd_exit(void)
        dasd_proc_exit();
 #endif
        dasd_eer_exit();
-        if (dasd_page_cache != NULL) {
-               kmem_cache_destroy(dasd_page_cache);
-               dasd_page_cache = NULL;
-       }
+       kmem_cache_destroy(dasd_page_cache);
+       dasd_page_cache = NULL;
        dasd_gendisk_exit();
        dasd_devmap_exit();
        if (dasd_debug_area != NULL) {