linux-kernel - [patch 2/2] mm: memcg: clean up mm_match

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Date:	Thu,  4 Oct 2012 14:09:17 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michal Hocko <mhocko@...e.cz>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [patch 2/2] mm: memcg: clean up mm_match_cgroup() signature

It really should return a boolean for match/no match.  And since it
takes a memcg, not a cgroup, fix that parameter name as well.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Acked-by: Michal Hocko <mhocko@...e.cz>
---
 include/linux/memcontrol.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 8686294..7698182 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -84,14 +84,14 @@ extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
 extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
 
 static inline
-int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
+bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
 {
-	struct mem_cgroup *memcg;
-	int match;
+	struct mem_cgroup *task_memcg;
+	bool match;
 
 	rcu_read_lock();
-	memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
-	match = memcg && __mem_cgroup_same_or_subtree(cgroup, memcg);
+	task_memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
+	match = task_memcg && __mem_cgroup_same_or_subtree(memcg, task_memcg);
 	rcu_read_unlock();
 	return match;
 }
@@ -258,10 +258,10 @@ static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm
 	return NULL;
 }
 
-static inline int mm_match_cgroup(struct mm_struct *mm,
+static inline bool mm_match_cgroup(struct mm_struct *mm,
 		struct mem_cgroup *memcg)
 {
-	return 1;
+	return true;
 }
 
 static inline int task_in_mem_cgroup(struct task_struct *task,
-- 
1.7.11.4

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