The hrtimer_start[_range_ns]() starts a timer reliable 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 --- include/linux/hrtimer.h | 6 +++--- kernel/time/hrtimer.c | 9 +++++---- 2 files changed, 8 insertions(+), 7 deletions(-) --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -365,11 +365,11 @@ extern void hrtimer_start_range_ns(struc 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) --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -933,12 +933,12 @@ static inline ktime_t hrtimer_update_low } /** - * 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) @@ -1116,7 +1116,8 @@ static void __hrtimer_init(struct hrtime * 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)