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

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Pull timer updates - and a leftover fix - from Thomas Gleixner:
 "A rather large (commit wise) update from the timer side:

   - A bulk update to make compile tests work in the clocksource drivers

   - An overhaul of the h8300 timers

   - Some more Y2038 work

   - A few overflow prevention checks in the timekeeping/ntp code

   - The usual pile of fixes and improvements to the various
     clocksource/clockevent drivers and core code"

Also:
 "A single fix for the posix-clock poll code which did not make it into
  4.4"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (84 commits)
  clocksource/drivers/acpi_pm: Convert to pr_* macros
  clocksource: Make clocksource validation work for all clocksources
  timekeeping: Cap adjustments so they don't exceed the maxadj value
  ntp: Fix second_overflow's input parameter type to be 64bits
  ntp: Change time_reftime to time64_t and utilize 64bit __ktime_get_real_seconds
  timekeeping: Provide internal function __ktime_get_real_seconds
  clocksource/drivers/h8300: Use ioread / iowrite
  clocksource/drivers/h8300: Initializer cleanup.
  clocksource/drivers/h8300: Simplify delta handling
  clocksource/drivers/h8300: Fix timer not overflow case
  clocksource/drivers/h8300: Change to overflow interrupt
  clocksource/drivers/lpc32: Correct pr_err() output format
  clocksource/drivers/arm_global_timer: Fix suspend resume
  clocksource/drivers/pistachio: Fix wrong calculated clocksource read value
  clockevents/drivers/arm_global_timer: Use writel_relaxed in gt_compare_set
  clocksource/drivers/dw_apb_timer: Inline apbt_readl and apbt_writel
  clocksource/drivers/dw_apb_timer: Use {readl|writel}_relaxed in critical path
  clocksource/drivers/dw_apb_timer: Fix apbt_readl return types
  clocksource/drivers/tango-xtal: Replace code by clocksource_mmio_init
  clocksource/drivers/h8300: Increase the compilation test coverage
  ...

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  posix-clock: Fix return code on the poll method's error path
This commit is contained in:
Linus Torvalds
2016-01-11 18:06:43 -08:00
parent ae8a52185e 01414888ea 1b9f23727a
commit b4cee21ee0
38 changed files with 629 additions and 632 deletions
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20
kernel/time/tick-sched.c
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@@ -603,15 +603,31 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
/*
* If the tick is due in the next period, keep it ticking or
* restart it proper.
* force prod the timer.
*/
delta = next_tick - basemono;
if (delta <= (u64)TICK_NSEC) {
tick.tv64 = 0;
/*
* We've not stopped the tick yet, and there's a timer in the
* next period, so no point in stopping it either, bail.
*/
if (!ts->tick_stopped)
goto out;
/*
* If, OTOH, we did stop it, but there's a pending (expired)
* timer reprogram the timer hardware to fire now.
*
* We will not restart the tick proper, just prod the timer
* hardware into firing an interrupt to process the pending
* timers. Just like tick_irq_exit() will not restart the tick
* for 'normal' interrupts.
*
* Only once we exit the idle loop will we re-enable the tick,
* see tick_nohz_idle_exit().
*/
if (delta == 0) {
/* Tick is stopped, but required now. Enforce it */
tick_nohz_restart(ts, now);
goto out;
}