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hrtimer: Store time as ktime_t in restart block 

The hrtimer core uses ktime_t to represent times, use that also for the
restart block. CPU timers internally use nanoseconds instead of ktime_t
but use the same restart block, so use the correct accessors for those.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20251110-restart-block-expiration-v1-3-5d39cc93df4f@linutronix.de
This commit is contained in:
Thomas Weißschuh 2025-11-10 10:38:53 +01:00 committed by Thomas Gleixner
parent ba14500e4b
commit 4702f4eceb
3 changed files with 5 additions and 5 deletions
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2
include/linux/restart_block.h
View File

@ -43,7 +43,7 @@ struct restart_block {
struct __kernel_timespec __user *rmtp;
struct old_timespec32 __user *compat_rmtp;
};
u64 expires;
ktime_t expires;
} nanosleep;
/* For poll */
struct {

4
kernel/time/hrtimer.c
View File

@ -2145,7 +2145,7 @@ static long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
int ret;
hrtimer_setup_sleeper_on_stack(&t, restart->nanosleep.clockid, HRTIMER_MODE_ABS);
hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires);
hrtimer_set_expires(&t.timer, restart->nanosleep.expires);
ret = do_nanosleep(&t, HRTIMER_MODE_ABS);
destroy_hrtimer_on_stack(&t.timer);
return ret;
@ -2172,7 +2172,7 @@ long hrtimer_nanosleep(ktime_t rqtp, const enum hrtimer_mode mode,
restart = &current->restart_block;
restart->nanosleep.clockid = t.timer.base->clockid;
restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer);
restart->nanosleep.expires = hrtimer_get_expires(&t.timer);
set_restart_fn(restart, hrtimer_nanosleep_restart);
out:
destroy_hrtimer_on_stack(&t.timer);

4
kernel/time/posix-cpu-timers.c
View File

@ -1557,7 +1557,7 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags,
* Report back to the user the time still remaining.
*/
restart = &current->restart_block;
restart->nanosleep.expires = expires;
restart->nanosleep.expires = ns_to_ktime(expires);
if (restart->nanosleep.type != TT_NONE)
error = nanosleep_copyout(restart, &it.it_value);
}
@ -1599,7 +1599,7 @@ static long posix_cpu_nsleep_restart(struct restart_block *restart_block)
clockid_t which_clock = restart_block->nanosleep.clockid;
struct timespec64 t;
t = ns_to_timespec64(restart_block->nanosleep.expires);
t = ktime_to_timespec64(restart_block->nanosleep.expires);
return do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t);
}