linux-toradex.git/kernel/time/time.c, branch v4.16-rc4

Merge branch 'fortglx/4.15/time' of https://git.linaro.org/people/john.stultz/linux into timers/core

2017-10-31T22:17:28+00:00

Pull timekeeping updates from John Stultz:

 - More y2038 work from Arnd Bergmann

 - A new mechanism to allow RTC drivers to specify the resolution of the
   RTC so the suspend/resume code can make informed decisions whether to
   inject the suspended time or not in case of fast suspend/resume cycles.

time: Move time_t conversion helpers to time32.h

2017-10-30T22:17:19+00:00

On 64-bit architectures, the timespec64 based helpers in linux/time.h
are defined as macros pointing to their timespec based counterparts.
This made sense when they were first introduced, but as we are migrating
away from timespec in general, it's much less intuitive now.

This changes the macros to work in the exact opposite way: we always
provide the timespec64 based helpers and define the old interfaces as
macros for them. Now we can move those macros into linux/time32.h, which
already contains the respective helpers for 32-bit architectures.

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

time: Remove unused functions

2017-10-30T22:14:18+00:00

The (slow but) ongoing work on conversion from timespec to timespec64
has led some timespec based helper functions to become unused.

No new code should use them, so we can remove the functions entirely.
I'm planning to obsolete additional interfaces next and remove
more of these.

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

timekeeping: Consolidate timekeeping_inject_offset code

2017-10-30T22:13:35+00:00

The code to check the adjtimex() or clock_adjtime() arguments is spread
out across multiple files for presumably only historic reasons. As a
preparatation for a rework to get rid of the use of 'struct timeval'
and 'struct timespec' in there, this moves all the portions into
kernel/time/timekeeping.c and marks them as 'static'.

The warp_clock() function here is not as closely related as the others,
but I feel it still makes sense to move it here in order to consolidate
all callers of timekeeping_inject_offset().

Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Miroslav Lichvar 
Cc: Richard Cochran 
Cc: Prarit Bhargava 
Cc: Stephen Boyd 
Signed-off-by: Arnd Bergmann 
[jstultz: Whitespace fixup]
Signed-off-by: John Stultz

time: Use do_settimeofday64() internally

2017-10-17T15:22:28+00:00

do_settimeofday() is a wrapper around do_settimeofday64(), so that function
can be called directly. The wrapper can be removed once the last user is
gone.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Thomas Gleixner 
Cc: y2038@lists.linaro.org
Cc: Frederic Weisbecker 
Cc: Stephen Boyd 
Cc: John Stultz 
Cc: Al Viro 
Cc: Deepa Dinamani 
Link: https://lkml.kernel.org/r/20171013183452.3635956-1-arnd@arndb.de

time: introduce {get,put}_itimerspec64

2017-06-26T01:58:46+00:00

As we change the user space type for the timerfd and posix timer
functions to newer data types, we need some form of conversion
helpers to avoid duplicating that logic.

Suggested-by: Arnd Bergmann 
Signed-off-by: Deepa Dinamani 
Signed-off-by: Al Viro

time: add get_timespec64 and put_timespec64

2017-06-26T01:58:46+00:00

Add helper functions to convert between struct timespec64 and
struct timespec at userspace boundaries.

This is a preparatory patch to use timespec64 as the basic type
internally in the kernel as timespec is not y2038 safe on 32 bit systems.
The patch helps the cause by containing all data conversions at the
userspace boundaries within these functions.

Suggested-by: Arnd Bergmann 
Signed-off-by: Deepa Dinamani 
Signed-off-by: Al Viro

time: Move compat_gettimeofday()/settimeofday() to native

2017-06-13T22:00:46+00:00

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-16-viro@ZenIV.linux.org.uk

time: Move compat_time()/stime() to native

2017-06-13T22:00:45+00:00

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-15-viro@ZenIV.linux.org.uk

ntp: Move adjtimex related compat syscalls to native counterparts

2017-06-13T22:00:43+00:00

Get rid of set_fs() mess and sanitize compat_{get,put}_timex(),
while we are at it.

Signed-off-by: Al Viro 
Signed-off-by: Thomas Gleixner 
Cc: John Stultz 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170607084241.28657-9-viro@ZenIV.linux.org.uk