linux-kernel - [RFC PATCH 1/5] sched/autogroup: Define autogroup_path() for !CONFIG_SCHED

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Date:   Tue, 28 Mar 2017 07:35:37 +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 1/5] sched/autogroup: Define autogroup_path() for !CONFIG_SCHED_DEBUG

Define autogroup_path() even in the !CONFIG_SCHED_DEBUG case. If
CONFIG_SCHED_AUTOGROUP is enabled the path of an autogroup has to be
available to be printed in the load tracking trace events provided by
this patch-stack regardless whether CONFIG_SCHED_DEBUG is set or not.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/autogroup.c | 2 --
 kernel/sched/autogroup.h | 2 --
 2 files changed, 4 deletions(-)

diff --git a/kernel/sched/autogroup.c b/kernel/sched/autogroup.c
index da39489d2d80..22be4eaf6ae2 100644
--- a/kernel/sched/autogroup.c
+++ b/kernel/sched/autogroup.c
@@ -260,7 +260,6 @@ void proc_sched_autogroup_show_task(struct task_struct *p, struct seq_file *m)
 }
 #endif /* CONFIG_PROC_FS */
 
-#ifdef CONFIG_SCHED_DEBUG
 int autogroup_path(struct task_group *tg, char *buf, int buflen)
 {
 	if (!task_group_is_autogroup(tg))
@@ -268,4 +267,3 @@ int autogroup_path(struct task_group *tg, char *buf, int buflen)
 
 	return snprintf(buf, buflen, "%s-%ld", "/autogroup", tg->autogroup->id);
 }
-#endif /* CONFIG_SCHED_DEBUG */
diff --git a/kernel/sched/autogroup.h b/kernel/sched/autogroup.h
index ce40c810cd5c..6a661cfa9584 100644
--- a/kernel/sched/autogroup.h
+++ b/kernel/sched/autogroup.h
@@ -55,11 +55,9 @@ autogroup_task_group(struct task_struct *p, struct task_group *tg)
 	return tg;
 }
 
-#ifdef CONFIG_SCHED_DEBUG
 static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
 {
 	return 0;
 }
-#endif
 
 #endif /* CONFIG_SCHED_AUTOGROUP */
-- 
2.11.0