diff options
| -rw-r--r-- | include/linux/delay.h | 2 | ||||
| -rw-r--r-- | kernel/hrtimer.c | 15 |
2 files changed, 16 insertions, 1 deletions
diff --git a/include/linux/delay.h b/include/linux/delay.h index e23a7c0..37caab3 100644 --- a/include/linux/delay.h +++ b/include/linux/delay.h @@ -53,7 +53,7 @@ static inline void ssleep(unsigned int seconds) } #ifdef CONFIG_PREEMPT_RT_FULL -# define cpu_chill() msleep(1) +extern void cpu_chill(void); #else # define cpu_chill() cpu_relax() #endif diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 3411edb..dba296e 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1912,6 +1912,21 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp, return hrtimer_nanosleep(&tu, rmtp, HRTIMER_MODE_REL, CLOCK_MONOTONIC); } +#ifdef CONFIG_PREEMPT_RT_FULL +/* + * Sleep for 1 ms in hope whoever holds what we want will let it go. + */ +void cpu_chill(void) +{ + struct timespec tu = { + .tv_nsec = NSEC_PER_MSEC, + }; + + hrtimer_nanosleep(&tu, NULL, HRTIMER_MODE_REL, CLOCK_MONOTONIC); +} +EXPORT_SYMBOL(cpu_chill); +#endif + /* * Functions related to boot-time initialization: */ |