mm/z3fold.c: use xx_zalloc instead xx_alloc and memset

alloc_slots() allocates memory for slots using kmem_cache_alloc(), then
memsets it.  We can just use kmem_cache_zalloc().

Signed-off-by: Hui Su <sh_def@163.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20200926100834.GA184671@rlk
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 460b0fe..18feaa0 100644 (file)
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -212,13 +212,12 @@ static inline struct z3fold_buddy_slots *alloc_slots(struct z3fold_pool *pool,
 {
        struct z3fold_buddy_slots *slots;
 
-       slots = kmem_cache_alloc(pool->c_handle,
+       slots = kmem_cache_zalloc(pool->c_handle,
                                 (gfp & ~(__GFP_HIGHMEM | __GFP_MOVABLE)));
 
        if (slots) {
                /* It will be freed separately in free_handle(). */
                kmemleak_not_leak(slots);
-               memset(slots->slot, 0, sizeof(slots->slot));
                slots->pool = (unsigned long)pool;
                rwlock_init(&slots->lock);
        }