linux-toradex.git/kernel/time/alarmtimer.c, branch v4.14-rc3

alarmtimer: Ensure RTC module is not unloaded

2017-08-31T19:36:45+00:00

When registering the rtc device to be used to handle alarm timers,
get_device is used to ensure the device doesn't go away but the module can
still be unloaded.

Call try_module_get to ensure the rtc driver will not go away.

Reported-and-tested-by: Michal Simek 
Signed-off-by: Alexandre Belloni 
Signed-off-by: Thomas Gleixner 
Acked-by: John Stultz 
Cc: Stephen Boyd 
Link: http://lkml.kernel.org/r/20170820220146.30969-1-alexandre.belloni@free-electrons.com

alarmtimer: Fix unavailable wake-up source in sysfs

2017-08-17T19:15:10+00:00

Currently the alarmtimer registers a wake-up source unconditionally,
regardless of the system having a (wake-up capable) RTC or not.
Hence the alarmtimer will always show up in
/sys/kernel/debug/wakeup_sources, even if it is not available, and thus
cannot be a wake-up source.

To fix this, postpone registration until a wake-up capable RTC device is
added.

Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Miroslav Lichvar 
Cc: Richard Cochran 
Cc: Prarit Bhargava 
Cc: Stephen Boyd 
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: John Stultz

nanosleep: Use get_timespec64() and put_timespec64()

2017-06-30T08:14:14+00:00

Usage of these apis and their compat versions makes
the syscalls: clock_nanosleep and nanosleep and
their compat implementations simpler.

This is a preparatory patch to isolate data conversions to
struct timespec64 at userspace boundaries. This helps contain
the changes needed to transition to new y2038 safe types.

Signed-off-by: Deepa Dinamani 
Signed-off-by: Al Viro

posix-timers: Make nanosleep timespec argument const

2017-06-13T22:00:47+00:00

No nanosleep implementation modifies the rqtp argument. Mark is const.

Signed-off-by: Thomas Gleixner 
Cc: Al Viro 
Cc: John Stultz 
Cc: Peter Zijlstra

hrtimers/posix-timers: Merge nanosleep timespec copyout logics into a new helper

2017-06-13T22:00:42+00:00

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-7-viro@ZenIV.linux.org.uk

time/posix-timers: Move the compat copyouts to the nanosleep implementations

2017-06-13T22:00:42+00:00

Turn restart_block.nanosleep.{rmtp,compat_rmtp} into a tagged union (kind =
1 -> native, kind = 2 -> compat, kind = 0 -> nothing) and make the places
doing actual copyout handle compat as well as native (that will become a
helper in the next commit).  Result: compat wrappers, messing with
reassignments, etc. are gone.

[ tglx: Folded in a variant of Peter Zijlstras enum patch ]

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-6-viro@ZenIV.linux.org.uk

posix-timers: Store rmtp into restart_block in sys_clock_nanosleep()

2017-06-13T22:00:41+00:00

... instead of doing that in every ->nsleep() instance

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-5-viro@ZenIV.linux.org.uk

alarmtimer: Move copyout and freeze handling into alarmtimer_do_nsleep()

2017-06-13T22:00:40+00:00

The alarmtimer nanosleep() implementation can be simplified by moving the
copy out of the remaining time to alarmtimer_do_nsleep() which is shared
between the real nanosleep function and the restart function.

The pointer to the timespec64 which is updated has to be stored in the
restart block anyway. Instead of storing it only in the restart case, store
it before calling alarmtimer_do_nsleep() and copy the remaining time in the
signal exit path.

[ tglx: Added changelog ]

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-2-viro@ZenIV.linux.org.uk

alarmtimer: Switch over to generic set/get/rearm routine

2017-06-04T13:40:32+00:00

All required callbacks are in place. Switch the alarm timer based posix
interval timer callbacks to the common implementation and remove the
incorrect private implementation.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: John Stultz 
Link: http://lkml.kernel.org/r/20170530211657.825471962@linutronix.de

alarmtimer: Implement arm callback

2017-06-04T13:40:31+00:00

Preparatory change to utilize the common posix timer mechanisms.

Signed-off-by: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: John Stultz 
Link: http://lkml.kernel.org/r/20170530211657.747567162@linutronix.de