[PATCH cgroup/for-4.15] cgroup: mark @cgrp __maybe_unused in cpu_stat_show()

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>From c3ba13298709f46e72b22d087d0aa02bd012e4b0 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Mon, 30 Oct 2017 08:13:14 -0700

The local variable @cgrp isn't used if !CONFIG_CGROUP_SCHED.  Mark the
variable with __maybe_unused to avoid a compile warning.

Reported-by: "kbuild-all@xxxxxx" <kbuild-all@xxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
Applied to cgroup/for-4.15.

Thanks.

 kernel/cgroup/cgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index d9773e4..d6ed725 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -3357,7 +3357,7 @@ static int __maybe_unused cgroup_extra_stat_show(struct seq_file *seq,
 
 static int cpu_stat_show(struct seq_file *seq, void *v)
 {
-	struct cgroup *cgrp = seq_css(seq)->cgroup;
+	struct cgroup __maybe_unused *cgrp = seq_css(seq)->cgroup;
 	int ret = 0;
 
 	cgroup_stat_show_cputime(seq);
-- 
2.9.5

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