fs: use kmem_cache_zalloc instead

Signed-off-by: NDenis Cheng <crquan@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

fs/file_table.c

@@ -102,12 +102,11 @@ struct file *get_empty_filp(void)
 			goto over;
 	}
 
-	f = kmem_cache_alloc(filp_cachep, GFP_KERNEL);
+	f = kmem_cache_zalloc(filp_cachep, GFP_KERNEL);
 	if (f == NULL)
 		goto fail;
 
 	percpu_counter_inc(&nr_files);
-	memset(f, 0, sizeof(*f));
 	if (security_file_alloc(f))
 		goto fail_sec;