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This recent commit:96d1610e0b("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:96d1610e0b("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