memcontrol: add vm_match_cgroup()

[cascardo/linux.git] / include / linux / memcontrol.h

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 9815951..925d57b 100644 (file)
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -51,10 +51,8 @@ extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
                                        gfp_t gfp_mask);
 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
 
-static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
-{
-       return rcu_dereference(mm->mem_cgroup);
-}
+#define vm_match_cgroup(mm, cgroup)    \
+       ((cgroup) == rcu_dereference((mm)->mem_cgroup))
 
 extern int mem_cgroup_prepare_migration(struct page *page);
 extern void mem_cgroup_end_migration(struct page *page);
@@ -123,9 +121,9 @@ static inline int mem_cgroup_cache_charge(struct page *page,
        return 0;
 }
 
-static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
+static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 {
-       return NULL;
+       return 1;
 }
 
 static inline int task_in_mem_cgroup(struct task_struct *task,