cgroup: mark @cgrp __maybe_unused in cpu_stat_show()

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@01.org" <kbuild-all@01.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index d9773e49a1b4593db19200e365a6cd415a94293a..d6ed725f36d99d21808e41b92d99de8ad4ea2262 100644 (file)
--- 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);