[PATCH] mm/page_alloc: simplify kmem cgroup charge/uncharge code

[Hui Su]

Since the commit 60cd4bcd6238 ("memcg: localize memcg_kmem_enabled()
check"), we have supplied the api which users don't have to explicitly
check memcg_kmem_enabled().

Signed-off-by: Hui Su <sh_...@163.com>
---
 mm/page_alloc.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index eaa227a479e4..dc990a899ded 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1214,8 +1214,8 @@ static __always_inline bool free_pages_prepare(struct 
page *page,
                 * Do not let hwpoison pages hit pcplists/buddy
                 * Untie memcg state and reset page's owner
                 */
-               if (memcg_kmem_enabled() && PageKmemcg(page))
-                       __memcg_kmem_uncharge_page(page, order);
+               if (PageKmemcg(page))
+                       memcg_kmem_uncharge_page(page, order);
                reset_page_owner(page, order);
                return false;
        }
@@ -1244,8 +1244,8 @@ static __always_inline bool free_pages_prepare(struct 
page *page,
        }
        if (PageMappingFlags(page))
                page->mapping = NULL;
-       if (memcg_kmem_enabled() && PageKmemcg(page))
-               __memcg_kmem_uncharge_page(page, order);
+       if (PageKmemcg(page))
+               memcg_kmem_uncharge_page(page, order);
        if (check_free)
                bad += check_free_page(page);
        if (bad)
@@ -4965,8 +4965,8 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int 
order, int preferred_nid,
        page = __alloc_pages_slowpath(alloc_mask, order, &ac);
 
 out:
-       if (memcg_kmem_enabled() && (gfp_mask & __GFP_ACCOUNT) && page &&
-           unlikely(__memcg_kmem_charge_page(page, gfp_mask, order) != 0)) {
+       if ((gfp_mask & __GFP_ACCOUNT) && page &&
+           unlikely(memcg_kmem_charge_page(page, gfp_mask, order) != 0)) {
                __free_pages(page, order);
                page = NULL;
        }
-- 
2.29.2