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Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull timer updates from Thomas Gleixner:
 "Rather large, but nothing exiting:

   - new range check for settimeofday() to prevent that boot time
     becomes negative.
   - fix for file time rounding
   - a few simplifications of the hrtimer code
   - fix for the proc/timerlist code so the output of clock realtime
     timers is accurate
   - more y2038 work
   - tree wide conversion of clockevent drivers to the new callbacks"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (88 commits)
  hrtimer: Handle failure of tick_init_highres() gracefully
  hrtimer: Unconfuse switch_hrtimer_base() a bit
  hrtimer: Simplify get_target_base() by returning current base
  hrtimer: Drop return code of hrtimer_switch_to_hres()
  time: Introduce timespec64_to_jiffies()/jiffies_to_timespec64()
  time: Introduce current_kernel_time64()
  time: Introduce struct itimerspec64
  time: Add the common weak version of update_persistent_clock()
  time: Always make sure wall_to_monotonic isn't positive
  time: Fix nanosecond file time rounding in timespec_trunc()
  timer_list: Add the base offset so remaining nsecs are accurate for non monotonic timers
  cris/time: Migrate to new 'set-state' interface
  kernel: broadcast-hrtimer: Migrate to new 'set-state' interface
  xtensa/time: Migrate to new 'set-state' interface
  unicore/time: Migrate to new 'set-state' interface
  um/time: Migrate to new 'set-state' interface
  sparc/time: Migrate to new 'set-state' interface
  sh/localtimer: Migrate to new 'set-state' interface
  score/time: Migrate to new 'set-state' interface
  s390/time: Migrate to new 'set-state' interface
  ...
This commit is contained in:
Linus Torvalds
2015-09-01 14:04:50 -07:00
parent 8d01b66b4f 85e1cd6e76
commit 5e359bf221
80 changed files with 1575 additions and 1681 deletions
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43
kernel/time/time.c
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@@ -291,26 +291,20 @@ EXPORT_SYMBOL(jiffies_to_usecs);
* @t: Timespec
* @gran: Granularity in ns.
*
* Truncate a timespec to a granularity. gran must be smaller than a second.
* Always rounds down.
*
* This function should be only used for timestamps returned by
* current_kernel_time() or CURRENT_TIME, not with do_gettimeofday() because
* it doesn't handle the better resolution of the latter.
* Truncate a timespec to a granularity. Always rounds down. gran must
* not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns).
*/
struct timespec timespec_trunc(struct timespec t, unsigned gran)
{
/*
* Division is pretty slow so avoid it for common cases.
* Currently current_kernel_time() never returns better than
* jiffies resolution. Exploit that.
*/
if (gran <= jiffies_to_usecs(1) * 1000) {
/* Avoid division in the common cases 1 ns and 1 s. */
if (gran == 1) {
/* nothing */
} else if (gran == 1000000000) {
} else if (gran == NSEC_PER_SEC) {
t.tv_nsec = 0;
} else {
} else if (gran > 1 && gran < NSEC_PER_SEC) {
t.tv_nsec -= t.tv_nsec % gran;
} else {
WARN(1, "illegal file time granularity: %u", gran);
}
return t;
}
@@ -550,7 +544,7 @@ EXPORT_SYMBOL(__usecs_to_jiffies);
* value to a scaled second value.
*/
static unsigned long
__timespec_to_jiffies(unsigned long sec, long nsec)
__timespec64_to_jiffies(u64 sec, long nsec)
{
nsec = nsec + TICK_NSEC - 1;
@@ -558,22 +552,27 @@ __timespec_to_jiffies(unsigned long sec, long nsec)
sec = MAX_SEC_IN_JIFFIES;
nsec = 0;
}
return (((u64)sec * SEC_CONVERSION) +
return ((sec * SEC_CONVERSION) +
(((u64)nsec * NSEC_CONVERSION) >>
(NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC;
}
unsigned long
timespec_to_jiffies(const struct timespec *value)
static unsigned long
__timespec_to_jiffies(unsigned long sec, long nsec)
{
return __timespec_to_jiffies(value->tv_sec, value->tv_nsec);
return __timespec64_to_jiffies((u64)sec, nsec);
}
EXPORT_SYMBOL(timespec_to_jiffies);
unsigned long
timespec64_to_jiffies(const struct timespec64 *value)
{
return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec);
}
EXPORT_SYMBOL(timespec64_to_jiffies);
void
jiffies_to_timespec(const unsigned long jiffies, struct timespec *value)
jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value)
{
/*
* Convert jiffies to nanoseconds and separate with
@@ -584,7 +583,7 @@ jiffies_to_timespec(const unsigned long jiffies, struct timespec *value)
NSEC_PER_SEC, &rem);
value->tv_nsec = rem;
}
EXPORT_SYMBOL(jiffies_to_timespec);
EXPORT_SYMBOL(jiffies_to_timespec64);
/*
* We could use a similar algorithm to timespec_to_jiffies (with a