mm/zsmalloc: allocate exactly size of struct zs_pool

In zs_create_pool(), we allocate memory more then sizeof(struct zs_pool)
  ovhd_size = roundup(sizeof(*pool), PAGE_SIZE);

This patch allocate memory of exactly needed size.

Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2021df5eb891..4d0a063145ec 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -979,12 +979,11 @@ static bool can_merge(struct size_class *prev, int size, int pages_per_zspage)
  */
 struct zs_pool *zs_create_pool(gfp_t flags)
 {
-        int i, ovhd_size;
+        int i;
         struct zs_pool *pool;
         struct size_class *prev_class = NULL;
 
-        ovhd_size = roundup(sizeof(*pool), PAGE_SIZE);
-        pool = kzalloc(ovhd_size, GFP_KERNEL);
+        pool = kzalloc(sizeof(*pool), GFP_KERNEL);
         if (!pool)
                 return NULL;