diff options
Diffstat (limited to 'kernel/time/hrtimer.c')
| -rw-r--r-- | kernel/time/hrtimer.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 18d2fe271cf7..c3914e8f87b0 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -49,6 +49,7 @@ #include <linux/sched/deadline.h> #include <linux/timer.h> #include <linux/freezer.h> +#include <linux/delay.h> #include <asm/uaccess.h> @@ -1648,6 +1649,12 @@ static void migrate_hrtimer_list(struct hrtimer_cpu_base *old_base, raw_spin_unlock(&old_base->lock); raw_spin_unlock(&new_base->lock); cpu_relax(); + /* + * cpu_relax may just be a barrier. Grant the + * run_hrtimer_list code some time to obtain the + * spinlock. + */ + udelay(2); raw_spin_lock(&new_base->lock); raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING); |