mm: memcontrol: simplify lruvec_holds_page_lru_lock

[linux-2.6-microblaze.git] / include / linux / memcontrol.h

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index f2a5aab..2fc7284 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -755,22 +755,6 @@ static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page)
        return mem_cgroup_lruvec(memcg, pgdat);
 }
 
-static inline bool lruvec_holds_page_lru_lock(struct page *page,
-                                             struct lruvec *lruvec)
-{
-       pg_data_t *pgdat = page_pgdat(page);
-       const struct mem_cgroup *memcg;
-       struct mem_cgroup_per_node *mz;
-
-       if (mem_cgroup_disabled())
-               return lruvec == &pgdat->__lruvec;
-
-       mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
-       memcg = page_memcg(page) ? : root_mem_cgroup;
-
-       return lruvec->pgdat == pgdat && mz->memcg == memcg;
-}
-
 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
 
 struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm);
@@ -1227,14 +1211,6 @@ static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page)
        return &pgdat->__lruvec;
 }
 
-static inline bool lruvec_holds_page_lru_lock(struct page *page,
-                                             struct lruvec *lruvec)
-{
-       pg_data_t *pgdat = page_pgdat(page);
-
-       return lruvec == &pgdat->__lruvec;
-}
-
 static inline void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page)
 {
 }
@@ -1516,6 +1492,13 @@ static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec,
        spin_unlock_irqrestore(&lruvec->lru_lock, flags);
 }
 
+static inline bool lruvec_holds_page_lru_lock(struct page *page,
+                                             struct lruvec *lruvec)
+{
+       return lruvec_pgdat(lruvec) == page_pgdat(page) &&
+              lruvec_memcg(lruvec) == page_memcg(page);
+}
+
 /* Don't lock again iff page's lruvec locked */
 static inline struct lruvec *relock_page_lruvec_irq(struct page *page,
                struct lruvec *locked_lruvec)