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>

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2021df5..4d0a063 100644 (file)
--- 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;