diff options
| author | Prasad Sodagudi <psodagud@codeaurora.org> | 2018-09-24 16:25:55 -0700 |
|---|---|---|
| committer | Georg Veichtlbauer <georg@vware.at> | 2023-07-16 12:47:42 +0200 |
| commit | 400383059868487869772b1c68ab8db4b6c81cbb (patch) | |
| tree | 41c06132b571bf7c58c392989f4be4c39cf49977 /kernel/time/alarmtimer.c | |
| parent | 1daa7ea39076e334a07ffb90f55ae33398b3477f (diff) | |
kernel: time: Add delay after cpu_relax() in tight loops
Tight loops of spin_lock_irqsave() and spin_unlock_irqrestore()
in timer and hrtimer are causing scheduling delays. Add delay of
few nano seconds after cpu_relax in the timer/hrtimer tight loops.
Change-Id: Iaa0ab92da93f7b245b1d922b6edca2bebdc0fbce
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
Diffstat (limited to 'kernel/time/alarmtimer.c')
| -rw-r--r-- | kernel/time/alarmtimer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c index 4171fee2d4ec..612c97156df7 100644 --- a/kernel/time/alarmtimer.c +++ b/kernel/time/alarmtimer.c @@ -25,6 +25,7 @@ #include <linux/posix-timers.h> #include <linux/workqueue.h> #include <linux/freezer.h> +#include <linux/delay.h> #ifdef CONFIG_MSM_PM #include "lpm-levels.h" @@ -503,6 +504,7 @@ int alarm_cancel(struct alarm *alarm) if (ret >= 0) return ret; cpu_relax(); + ndelay(TIMER_LOCK_TIGHT_LOOP_DELAY_NS); } } EXPORT_SYMBOL_GPL(alarm_cancel); |