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-rw-r--r--mm/memcontrol.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 01c2d8f14685..78eb8552818b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -314,14 +314,6 @@ static struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
return mem;
}
-static bool mem_cgroup_is_obsolete(struct mem_cgroup *mem)
-{
- if (!mem)
- return true;
- return css_is_removed(&mem->css);
-}
-
-
/*
* Call callback function against all cgroup under hierarchy tree.
*/
@@ -932,7 +924,7 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm,
if (unlikely(!mem))
return 0;
- VM_BUG_ON(!mem || mem_cgroup_is_obsolete(mem));
+ VM_BUG_ON(css_is_removed(&mem->css));
while (1) {
int ret;
@@ -1488,8 +1480,9 @@ void mem_cgroup_uncharge_cache_page(struct page *page)
__mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_CACHE);
}
+#ifdef CONFIG_SWAP
/*
- * called from __delete_from_swap_cache() and drop "page" account.
+ * called after __delete_from_swap_cache() and drop "page" account.
* memcg information is recorded to swap_cgroup of "ent"
*/
void mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent)
@@ -1506,6 +1499,7 @@ void mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent)
if (memcg)
css_put(&memcg->css);
}
+#endif
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
/*