1 files changed, 6 insertions, 2 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e1ee6ad9c971..b56bd74b486f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2475,7 +2475,7 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
 
         /* shmem */
         if (PageSwapCache(page)) {
-                struct mem_cgroup *mem = NULL;
+                struct mem_cgroup *mem;
 
                 ret = mem_cgroup_try_charge_swapin(mm, page, gfp_mask, &mem);
                 if (!ret)
@@ -2501,6 +2501,8 @@ int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
         struct mem_cgroup *mem;
         int ret;
 
+        *ptr = NULL;
+
         if (mem_cgroup_disabled())
                 return 0;
 
@@ -2916,6 +2918,8 @@ int mem_cgroup_prepare_migration(struct page *page,
         enum charge_type ctype;
         int ret = 0;
 
+        *ptr = NULL;
+
         VM_BUG_ON(PageTransHuge(page));
         if (mem_cgroup_disabled())
                 return 0;
@@ -3058,7 +3062,7 @@ int mem_cgroup_shmem_charge_fallback(struct page *page,
                             struct mm_struct *mm,
                             gfp_t gfp_mask)
 {
-        struct mem_cgroup *mem = NULL;
+        struct mem_cgroup *mem;
         int ret;
 
         if (mem_cgroup_disabled())