[PATCHv2] sched/uclamp: Fix unnused variable warning

[Christian Loehle]

uclamp_mutex is only used for CONFIG_SYSCTL or
CONFIG_UCLAMP_TASK_GROUP so declare it __maybe_unused.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202410060258.bPl2ZoUo-lkp@xxxxxxxxx/
Closes: https://lore.kernel.org/oe-kbuild-all/202410250459.EJe6PJI5-lkp@xxxxxxxxx/
Signed-off-by: Christian Loehle <christian.loehle@xxxxxxx>
---
v2: __maybe_unused instead of ifdef (Peter)

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

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 114adac5a9c8..9bad282e7950 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1399,7 +1399,7 @@ void set_load_weight(struct task_struct *p, bool update_load)
  * requests are serialized using a mutex to reduce the risk of conflicting
  * updates or API abuses.
  */
-static DEFINE_MUTEX(uclamp_mutex);
+static __maybe_unused DEFINE_MUTEX(uclamp_mutex);

 /* Max allowed minimum utilization */
 static unsigned int __maybe_unused sysctl_sched_uclamp_util_min = SCHED_CAPACITY_SCALE;
--
2.34.1