* [RFC][PATCH 1/5] tick/nohz: Improve tick_nohz_get_next_hrtimer() kerneldoc
[not found] <2188825.ElGaqSPkdT@kreacher>
@ 2021-03-29 18:11 ` Rafael J. Wysocki
0 siblings, 0 replies; only message in thread
From: Rafael J. Wysocki @ 2021-03-29 18:11 UTC (permalink / raw)
To: Linux PM
Cc: LKML, Frederic Weisbecker, Peter Zijlstra, Thomas Gleixner,
Zhou Ti (x2019cwm)
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(-)
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)
{
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