sched/hrtick: Mark hrtick_clear() as always used

This recent commit:

  96d1610e0b20b ("sched: Optimize hrtimer handling")

introduced a new build warning when !CONFIG_HOTPLUG_CPU
while SCHED_HRTIMERS=y [ == HIGH_RES_TIMERS=y ]:

  /tip.testing/kernel/sched/core.c:882:13: warning: ‘hrtick_clear’ defined but not used [-Wunused-function]

Mark this helper function as always-used, instead of complicating
the code with another obscure #ifdef.

Fixes: 96d1610e0b20b ("sched: Optimize hrtimer handling")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/177245077226.1647592.1821545206171336606.tip-bot2@tip-bot2

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 49a64b4117a13a7f18b695699c7bb50bfc0caddb..a4e7698e6938382206fe781248eea0febb747f07 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -879,7 +879,7 @@ enum {
        HRTICK_SCHED_REARM_HRTIMER      = BIT(3)
 };
 
-static void hrtick_clear(struct rq *rq)
+static void __used hrtick_clear(struct rq *rq)
 {
        if (hrtimer_active(&rq->hrtick_timer))
                hrtimer_cancel(&rq->hrtick_timer);