GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-22 06:32:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

hrtimer: add a hrtimer_start_range() function

Browse source 
this patch adds a _range version of hrtimer_start() so that range timers
can be created; the hrtimer_start() function is just a wrapper around this.

In addition, hrtimer_start_expires() will now preserve existing ranges.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Arjan van de Ven 2008-09-07 10:47:46 -07:00
parent 2ec02270c0
commit da8f2e170e
2 changed files with 31 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/linux/hrtimer.h
View file

@ -350,13 +350,20 @@ static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { }
/* Basic timer operations: */ /* Basic timer operations: */
extern int hrtimer_start(struct hrtimer *timer, ktime_t tim, extern int hrtimer_start(struct hrtimer *timer, ktime_t tim,
const enum hrtimer_mode mode); const enum hrtimer_mode mode);
extern int hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
unsigned long range_ns, const enum hrtimer_mode mode);
extern int hrtimer_cancel(struct hrtimer *timer); extern int hrtimer_cancel(struct hrtimer *timer);
extern int hrtimer_try_to_cancel(struct hrtimer *timer); extern int hrtimer_try_to_cancel(struct hrtimer *timer);
static inline int hrtimer_start_expires(struct hrtimer *timer, static inline int hrtimer_start_expires(struct hrtimer *timer,
enum hrtimer_mode mode) enum hrtimer_mode mode)
{ {
return hrtimer_start(timer, hrtimer_get_expires(timer), mode); unsigned long delta;
ktime_t soft, hard;
soft = hrtimer_get_softexpires(timer);
hard = hrtimer_get_expires(timer);
delta = ktime_to_ns(ktime_sub(hard, soft));
return hrtimer_start_range_ns(timer, hrtimer_get_expires(timer), delta, mode);
} }
static inline int hrtimer_restart(struct hrtimer *timer) static inline int hrtimer_restart(struct hrtimer *timer)

26
kernel/hrtimer.c
View file

@ -945,9 +945,10 @@ remove_hrtimer(struct hrtimer *timer, struct hrtimer_clock_base *base)
} }
/** /**
* hrtimer_start - (re)start an relative timer on the current CPU * hrtimer_start_range_ns - (re)start an relative timer on the current CPU
* @timer: the timer to be added * @timer: the timer to be added
* @tim: expiry time * @tim: expiry time
* @delta_ns: "slack" range for the timer
* @mode: expiry mode: absolute (HRTIMER_ABS) or relative (HRTIMER_REL) * @mode: expiry mode: absolute (HRTIMER_ABS) or relative (HRTIMER_REL)
* *
* Returns: * Returns:
@ -955,7 +956,8 @@ remove_hrtimer(struct hrtimer *timer, struct hrtimer_clock_base *base)
* 1 when the timer was active * 1 when the timer was active
*/ */
int int
hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode) hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, unsigned long delta_ns,
const enum hrtimer_mode mode)
{ {
struct hrtimer_clock_base *base, *new_base; struct hrtimer_clock_base *base, *new_base;
unsigned long flags; unsigned long flags;
@ -983,7 +985,7 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
#endif #endif
} }
hrtimer_set_expires(timer, tim); hrtimer_set_expires_range_ns(timer, tim, delta_ns);
timer_stats_hrtimer_set_start_info(timer); timer_stats_hrtimer_set_start_info(timer);
@ -1016,8 +1018,26 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(hrtimer_start_range_ns);
/**
* hrtimer_start - (re)start an relative timer on the current CPU
* @timer: the timer to be added
* @tim: expiry time
* @mode: expiry mode: absolute (HRTIMER_ABS) or relative (HRTIMER_REL)
*
* Returns:
* 0 on success
* 1 when the timer was active
*/
int
hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode)
{
return hrtimer_start_range_ns(timer, tim, 0, mode);
}
EXPORT_SYMBOL_GPL(hrtimer_start); EXPORT_SYMBOL_GPL(hrtimer_start);
/** /**
* hrtimer_try_to_cancel - try to deactivate a timer * hrtimer_try_to_cancel - try to deactivate a timer
* @timer: hrtimer to stop * @timer: hrtimer to stop