Commit 8ffc9ea8 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Peter Zijlstra
Browse files

hrtimer: Evaluate timer expiry only once 



No point in accessing the timer twice.

Signed-off-by: default avatarThomas Gleixner <tglx@kernel.org>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260224163430.409352042@kernel.org
parent 0c6af0ea

kernel/time/hrtimer.c

+3 −2
Original line number Diff line number Diff line
@@ -810,10 +810,11 @@ static void hrtimer_reprogram(struct hrtimer *timer, bool reprogram) 
{

	struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);

	struct hrtimer_clock_base *base = timer->base;

	ktime_t expires = ktime_sub(hrtimer_get_expires(timer), base->offset);

	ktime_t expires = hrtimer_get_expires(timer);



	WARN_ON_ONCE(hrtimer_get_expires(timer) < 0);

	WARN_ON_ONCE(expires < 0);



	expires = ktime_sub(expires, base->offset);

	/*

	 * CLOCK_REALTIME timer might be requested with an absolute

	 * expiry time which is less than base->offset. Set it to 0.