# \[RFC\]\[PATCH 1/5\] tick/nohz: Improve tick\_nohz\_get\_next\_hrtimer() kerneldoc - From: Rafael J. Wysocki \ - Date: 2021-03-29 18:38:45 - List: linux-pm - Page: https://ratatoskr.run/linux-pm/2021/03/6320075 - Thread: https://ratatoskr.run/linux-pm/2021/03/6320075/t.md ```text From: "Rafael J. Wysocki" Make the tick_nohz_get_next_hrtimer() kerneldoc comment state clearly that the function may return negative numbers. Signed-off-by: Rafael J. Wysocki --- kernel/time/tick-sched.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) Index: linux-pm/kernel/time/tick-sched.c =================================================================== --- linux-pm.orig/kernel/time/tick-sched.c +++ linux-pm/kernel/time/tick-sched.c @@ -1124,7 +1124,11 @@ ktime_t tick_nohz_get_next_hrtimer(void) * tick_nohz_get_sleep_length - return the expected length of the current sleep * @delta_next: duration until the next event if the tick cannot be stopped * - * Called from power state control code with interrupts disabled + * Called from power state control code with interrupts disabled. + * + * The return value of this function and/or the value returned by it through the + * @delta_next pointer can be negative which must be taken into account by its + * callers. */ ktime_t tick_nohz_get_sleep_length(ktime_t *delta_next) { ```