linux-kernel - [RFC PATCH 3/5] sched/fair: Export group_cfs

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Date:   Tue, 28 Mar 2017 07:35:39 +0100
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Juri Lelli <juri.lelli@....com>,
        Patrick Bellasi <patrick.bellasi@....com>
Subject: [RFC PATCH 3/5] sched/fair: Export group_cfs_rq()

Export struct cfs_rq *group_cfs_rq(struct sched_entity *se) to be able
to distinguish sched_entities representing either tasks or task_groups
in the sched_entity related load tracking trace event provided by the
next patch.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
---
 include/linux/sched.h | 10 ++++++++++
 kernel/sched/fair.c   | 12 ------------
 2 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index d67eee84fd43..8a35ff99140b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -392,6 +392,16 @@ struct sched_entity {
 #endif
 };
 
+/* cfs_rq "owned" by this sched_entity */
+static inline struct cfs_rq *group_cfs_rq(struct sched_entity *se)
+{
+#ifdef CONFIG_FAIR_GROUP_SCHED
+	return se->my_q;
+#else
+	return NULL;
+#endif
+}
+
 struct sched_rt_entity {
 	struct list_head		run_list;
 	unsigned long			timeout;
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index ac19ab6ced8f..04d4f81b96ae 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -292,12 +292,6 @@ static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
 	return se->cfs_rq;
 }
 
-/* runqueue "owned" by this group */
-static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
-{
-	return grp->my_q;
-}
-
 static inline void list_add_leaf_cfs_rq(struct cfs_rq *cfs_rq)
 {
 	if (!cfs_rq->on_list) {
@@ -449,12 +443,6 @@ static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
 	return &rq->cfs;
 }
 
-/* runqueue "owned" by this group */
-static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
-{
-	return NULL;
-}
-
 static inline void list_add_leaf_cfs_rq(struct cfs_rq *cfs_rq)
 {
 }
-- 
2.11.0