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hrtimer: Fix hrtimer_start[_range_ns]() function descriptions 

The hrtimer_start[_range_ns]() functions start a timer reliably on this CPU only
when HRTIMER_MODE_PINNED is set.

Furthermore the HRTIMER_MODE_PINNED mode is not considered when a hrtimer is initialized.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: keescook@chromium.org
Link: http://lkml.kernel.org/r/20171221104205.7269-6-anna-maria@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Anna-Maria Gleixner 2017-12-21 11:41:34 +01:00 committed by Ingo Molnar
parent 907777136f
commit 6de6250c75
2 changed files with 8 additions and 7 deletions
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6
include/linux/hrtimer.h
View File

@ -361,11 +361,11 @@ extern void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
u64 range_ns, const enum hrtimer_mode mode);
/**
* hrtimer_start - (re)start an hrtimer on the current CPU
* hrtimer_start - (re)start an hrtimer
* @timer: the timer to be added
* @tim: expiry time
* @mode: expiry mode: absolute (HRTIMER_MODE_ABS) or
* relative (HRTIMER_MODE_REL)
* @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
* relative (HRTIMER_MODE_REL), and pinned (HRTIMER_MODE_PINNED)
*/
static inline void hrtimer_start(struct hrtimer *timer, ktime_t tim,
const enum hrtimer_mode mode)

9
kernel/time/hrtimer.c
View File

@ -924,12 +924,12 @@ static inline ktime_t hrtimer_update_lowres(struct hrtimer *timer, ktime_t tim,
}
/**
* hrtimer_start_range_ns - (re)start an hrtimer on the current CPU
* hrtimer_start_range_ns - (re)start an hrtimer
* @timer: the timer to be added
* @tim: expiry time
* @delta_ns: "slack" range for the timer
* @mode: expiry mode: absolute (HRTIMER_MODE_ABS) or
* relative (HRTIMER_MODE_REL)
* @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
* relative (HRTIMER_MODE_REL), and pinned (HRTIMER_MODE_PINNED)
*/
void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
u64 delta_ns, const enum hrtimer_mode mode)
@ -1107,7 +1107,8 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
* hrtimer_init - initialize a timer to the given clock
* @timer: the timer to be initialized
* @clock_id: the clock to be used
* @mode: timer mode abs/rel
* @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
* relative (HRTIMER_MODE_REL); pinned is not considered here!
*/
void hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
enum hrtimer_mode mode)