linux-kernel - [tip:sched/urgent] sched: Fix warning in kernel/sched/fair.c

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Date:	Sat, 26 Jan 2013 04:17:57 -0800
From:	tip-bot for Arnd Bergmann <arnd@...db.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	a.p.zijlstra@...llo.nl, pjt@...gle.com, pboonstoppel@...dia.com,
	arnd@...db.de, tglx@...utronix.de
Subject: [tip:sched/urgent] sched: Fix warning in kernel/sched/fair.c

Commit-ID:  38dc3348e36d6cbe6ad51d771e4db948cda5b0e3
Gitweb:     http://git.kernel.org/tip/38dc3348e36d6cbe6ad51d771e4db948cda5b0e3
Author:     Arnd Bergmann <arnd@...db.de>
AuthorDate: Fri, 25 Jan 2013 14:14:22 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 25 Jan 2013 15:23:14 +0100

sched: Fix warning in kernel/sched/fair.c

a4c96ae319 "sched: Unthrottle rt runqueues in
__disable_runtime()" turned the unthrottle_offline_cfs_rqs
function into a static symbol, which now triggers a warning
about it being potentially unused:

  kernel/sched/fair.c:2055:13: warning: 'unthrottle_offline_cfs_rqs' defined but not used [-Wunused-function]

Marking it __maybe_unused shuts up the gcc warning and lets the
compiler safely drop the function body when it's not being used.

To reproduce, build the ARM bcm2835_defconfig.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Peter Boonstoppel <pboonstoppel@...dia.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Turner <pjt@...gle.com>
Cc: linux-arm-kernel@...t.infradead.org
Link: http://lkml.kernel.org/r/1359123276-15833-6-git-send-email-arnd@arndb.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5eea870..81fa536 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2663,7 +2663,7 @@ static void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b)
 	hrtimer_cancel(&cfs_b->slack_timer);
 }
 
-static void unthrottle_offline_cfs_rqs(struct rq *rq)
+static void __maybe_unused unthrottle_offline_cfs_rqs(struct rq *rq)
 {
 	struct cfs_rq *cfs_rq;
 
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