[v1,1/5] tick/nohz: Improve tick_nohz_get_next_hrtimer() kerneldoc
diff mbox series

Message ID 3104403.44csPzL39Z@kreacher
State New, archived
Headers show
  • cpuidle: Take possible negative "sleep length" values into account
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Commit Message

Rafael J. Wysocki March 29, 2021, 6:13 p.m. UTC
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

Make the tick_nohz_get_next_hrtimer() kerneldoc comment state clearly
that the function may return negative numbers.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 kernel/time/tick-sched.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff mbox series

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)