diff options
Diffstat (limited to 'include/linux/delay.h')
| -rw-r--r-- | include/linux/delay.h | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/include/linux/delay.h b/include/linux/delay.h index 8e6828094c1e..039e7e0c7378 100644 --- a/include/linux/delay.h +++ b/include/linux/delay.h @@ -16,10 +16,11 @@ * 3. CPU clock rate changes. * * Please see this thread: - * http://lists.openwall.net/linux-kernel/2011/01/09/56 + * https://lists.openwall.net/linux-kernel/2011/01/09/56 */ -#include <linux/kernel.h> +#include <linux/math.h> +#include <linux/sched.h> extern unsigned long loops_per_jiffy; @@ -58,11 +59,33 @@ void calibrate_delay(void); void __attribute__((weak)) calibration_delay_done(void); void msleep(unsigned int msecs); unsigned long msleep_interruptible(unsigned int msecs); -void usleep_range(unsigned long min, unsigned long max); +void usleep_range_state(unsigned long min, unsigned long max, + unsigned int state); + +static inline void usleep_range(unsigned long min, unsigned long max) +{ + usleep_range_state(min, max, TASK_UNINTERRUPTIBLE); +} + +static inline void usleep_idle_range(unsigned long min, unsigned long max) +{ + usleep_range_state(min, max, TASK_IDLE); +} static inline void ssleep(unsigned int seconds) { msleep(seconds * 1000); } +/* see Documentation/timers/timers-howto.rst for the thresholds */ +static inline void fsleep(unsigned long usecs) +{ + if (usecs <= 10) + udelay(usecs); + else if (usecs <= 20000) + usleep_range(usecs, 2 * usecs); + else + msleep(DIV_ROUND_UP(usecs, 1000)); +} + #endif /* defined(_LINUX_DELAY_H) */ |