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Subject[tip: timers/core] alarmtimer: Make nanosleep() time namespace aware
The following commit has been merged into the timers/core branch of tip:

Commit-ID: 0b9b9a3b162e85e620e3598f1badc45b8a177492
Gitweb: https://git.kernel.org/tip/0b9b9a3b162e85e620e3598f1badc45b8a177492
Author: Andrei Vagin <avagin@gmail.com>
AuthorDate: Tue, 12 Nov 2019 01:27:04
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 14 Jan 2020 12:20:55 +01:00

alarmtimer: Make nanosleep() time namespace aware

clock_nanosleep() accepts absolute values of expiration time when the
TIMER_ABSTIME flag is set. This absolute value is inside the task's
time namespace and has to be converted to the host's time.

Co-developed-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-16-dima@arista.com


---
kernel/time/alarmtimer.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 9a8e81b..b51b36e 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -839,6 +839,8 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
ktime_t now = alarm_bases[type].get_ktime();

exp = ktime_add_safe(now, exp);
+ } else {
+ exp = timens_ktime_to_host(which_clock, exp);
}

ret = alarmtimer_do_nsleep(&alarm, exp, type);
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