memcg: remove NULL check from lookup_page_cgroup() result

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b94cd24..3a2d54b 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2369,10 +2369,7 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
        }
 
        pc = lookup_page_cgroup(page);
-       /* can happen at boot */
-       if (unlikely(!pc))
-               return 0;
-       prefetchw(pc);
+       BUG_ON(!pc); /* XXX: remove this and move pc lookup into commit */
 
        ret = __mem_cgroup_try_charge(mm, gfp_mask, &mem, oom, page_size);
        if (ret || !mem)