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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 core updates from Thomas Gleixner:
 "The time(r) departement provides:

   - more infrastructure work on the year 2038 issue

   - a few fixes in the Armada SoC timers

   - the usual pile of fixlets and improvements"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: armada-370-xp: Use the reference clock on A375 SoC
  watchdog: orion: Use the reference clock on Armada 375 SoC
  clocksource: armada-370-xp: Add missing clock enable
  time: Fix sign bug in NTP mult overflow warning
  time: Remove timekeeping_inject_sleeptime()
  rtc: Update suspend/resume timing to use 64bit time
  rtc/lib: Provide y2038 safe rtc_tm_to_time()/rtc_time_to_tm() replacement
  time: Fixup comments to reflect usage of timespec64
  time: Expose get_monotonic_coarse64() for in-kernel uses
  time: Expose getrawmonotonic64 for in-kernel uses
  time: Provide y2038 safe mktime() replacement
  time: Provide y2038 safe timekeeping_inject_sleeptime() replacement
  time: Provide y2038 safe do_settimeofday() replacement
  time: Complete NTP adjustment threshold judging conditions
  time: Avoid possible NTP adjustment mult overflow.
  time: Rename udelay_test.c to test_udelay.c
  clocksource: sirf: Remove hard-coded clock rate
This commit is contained in:
Linus Torvalds
2014-12-10 08:18:32 -08:00
parent 86c6a2fddf 89de77a8c5
commit a157508c97
14 changed files with 253 additions and 100 deletions
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2
kernel/time/Makefile
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@@ -13,7 +13,7 @@ obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o
obj-$(CONFIG_TICK_ONESHOT) += tick-sched.o
obj-$(CONFIG_TIMER_STATS) += timer_stats.o
obj-$(CONFIG_DEBUG_FS) += timekeeping_debug.o
obj-$(CONFIG_TEST_UDELAY) += udelay_test.o
obj-$(CONFIG_TEST_UDELAY) += test_udelay.o
$(obj)/time.o: $(obj)/timeconst.h

0
kernel/time/udelay_test.c → kernel/time/test_udelay.c
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20
kernel/time/time.c
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@@ -304,7 +304,9 @@ struct timespec timespec_trunc(struct timespec t, unsigned gran)
}
EXPORT_SYMBOL(timespec_trunc);
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
/*
* mktime64 - Converts date to seconds.
* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
*
@@ -314,15 +316,10 @@ EXPORT_SYMBOL(timespec_trunc);
* -year/100+year/400 terms, and add 10.]
*
* This algorithm was first published by Gauss (I think).
*
* WARNING: this function will overflow on 2106-02-07 06:28:16 on
* machines where long is 32-bit! (However, as time_t is signed, we
* will already get problems at other places on 2038-01-19 03:14:08)
*/
unsigned long
mktime(const unsigned int year0, const unsigned int mon0,
const unsigned int day, const unsigned int hour,
const unsigned int min, const unsigned int sec)
time64_t mktime64(const unsigned int year0, const unsigned int mon0,
const unsigned int day, const unsigned int hour,
const unsigned int min, const unsigned int sec)
{
unsigned int mon = mon0, year = year0;
@@ -332,15 +329,14 @@ mktime(const unsigned int year0, const unsigned int mon0,
year -= 1;
}
return ((((unsigned long)
return ((((time64_t)
(year/4 - year/100 + year/400 + 367*mon/12 + day) +
year*365 - 719499
)*24 + hour /* now have hours */
)*60 + min /* now have minutes */
)*60 + sec; /* finally seconds */
}
EXPORT_SYMBOL(mktime);
EXPORT_SYMBOL(mktime64);
/**
* set_normalized_timespec - set timespec sec and nsec parts and normalize

59
kernel/time/timekeeping.c
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@@ -519,9 +519,9 @@ EXPORT_SYMBOL(__getnstimeofday64);
/**
* getnstimeofday64 - Returns the time of day in a timespec64.
* @ts: pointer to the timespec to be set
* @ts: pointer to the timespec64 to be set
*
* Returns the time of day in a timespec (WARN if suspended).
* Returns the time of day in a timespec64 (WARN if suspended).
*/
void getnstimeofday64(struct timespec64 *ts)
{
@@ -623,7 +623,7 @@ EXPORT_SYMBOL_GPL(ktime_get_raw);
*
* The function calculates the monotonic clock from the realtime
* clock and the wall_to_monotonic offset and stores the result
* in normalized timespec format in the variable pointed to by @ts.
* in normalized timespec64 format in the variable pointed to by @ts.
*/
void ktime_get_ts64(struct timespec64 *ts)
{
@@ -703,18 +703,18 @@ void do_gettimeofday(struct timeval *tv)
EXPORT_SYMBOL(do_gettimeofday);
/**
* do_settimeofday - Sets the time of day
* @tv: pointer to the timespec variable containing the new time
* do_settimeofday64 - Sets the time of day.
* @ts: pointer to the timespec64 variable containing the new time
*
* Sets the time of day to the new time and update NTP and notify hrtimers
*/
int do_settimeofday(const struct timespec *tv)
int do_settimeofday64(const struct timespec64 *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 ts_delta, xt, tmp;
struct timespec64 ts_delta, xt;
unsigned long flags;
if (!timespec_valid_strict(tv))
if (!timespec64_valid_strict(ts))
return -EINVAL;
raw_spin_lock_irqsave(&timekeeper_lock, flags);
@@ -723,13 +723,12 @@ int do_settimeofday(const struct timespec *tv)
timekeeping_forward_now(tk);
xt = tk_xtime(tk);
ts_delta.tv_sec = tv->tv_sec - xt.tv_sec;
ts_delta.tv_nsec = tv->tv_nsec - xt.tv_nsec;
ts_delta.tv_sec = ts->tv_sec - xt.tv_sec;
ts_delta.tv_nsec = ts->tv_nsec - xt.tv_nsec;
tk_set_wall_to_mono(tk, timespec64_sub(tk->wall_to_monotonic, ts_delta));
tmp = timespec_to_timespec64(*tv);
tk_set_xtime(tk, &tmp);
tk_set_xtime(tk, ts);
timekeeping_update(tk, TK_CLEAR_NTP | TK_MIRROR | TK_CLOCK_WAS_SET);
@@ -741,7 +740,7 @@ int do_settimeofday(const struct timespec *tv)
return 0;
}
EXPORT_SYMBOL(do_settimeofday);
EXPORT_SYMBOL(do_settimeofday64);
/**
* timekeeping_inject_offset - Adds or subtracts from the current time.
@@ -895,12 +894,12 @@ int timekeeping_notify(struct clocksource *clock)
}
/**
* getrawmonotonic - Returns the raw monotonic time in a timespec
* @ts: pointer to the timespec to be set
* getrawmonotonic64 - Returns the raw monotonic time in a timespec
* @ts: pointer to the timespec64 to be set
*
* Returns the raw monotonic time (completely un-modified by ntp)
*/
void getrawmonotonic(struct timespec *ts)
void getrawmonotonic64(struct timespec64 *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 ts64;
@@ -915,9 +914,10 @@ void getrawmonotonic(struct timespec *ts)
} while (read_seqcount_retry(&tk_core.seq, seq));
timespec64_add_ns(&ts64, nsecs);
*ts = timespec64_to_timespec(ts64);
*ts = ts64;
}
EXPORT_SYMBOL(getrawmonotonic);
EXPORT_SYMBOL(getrawmonotonic64);
/**
* timekeeping_valid_for_hres - Check if timekeeping is suitable for hres
@@ -1068,8 +1068,8 @@ static void __timekeeping_inject_sleeptime(struct timekeeper *tk,
}
/**
* timekeeping_inject_sleeptime - Adds suspend interval to timeekeeping values
* @delta: pointer to a timespec delta value
* timekeeping_inject_sleeptime64 - Adds suspend interval to timeekeeping values
* @delta: pointer to a timespec64 delta value
*
* This hook is for architectures that cannot support read_persistent_clock
* because their RTC/persistent clock is only accessible when irqs are enabled.
@@ -1077,10 +1077,9 @@ static void __timekeeping_inject_sleeptime(struct timekeeper *tk,
* This function should only be called by rtc_resume(), and allows
* a suspend offset to be injected into the timekeeping values.
*/
void timekeeping_inject_sleeptime(struct timespec *delta)
void timekeeping_inject_sleeptime64(struct timespec64 *delta)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 tmp;
unsigned long flags;
/*
@@ -1095,8 +1094,7 @@ void timekeeping_inject_sleeptime(struct timespec *delta)
timekeeping_forward_now(tk);
tmp = timespec_to_timespec64(*delta);
__timekeeping_inject_sleeptime(tk, &tmp);
__timekeeping_inject_sleeptime(tk, delta);
timekeeping_update(tk, TK_CLEAR_NTP | TK_MIRROR | TK_CLOCK_WAS_SET);
@@ -1332,6 +1330,12 @@ static __always_inline void timekeeping_apply_adjustment(struct timekeeper *tk,
*
* XXX - TODO: Doc ntp_error calculation.
*/
if ((mult_adj > 0) && (tk->tkr.mult + mult_adj < mult_adj)) {
/* NTP adjustment caused clocksource mult overflow */
WARN_ON_ONCE(1);
return;
}
tk->tkr.mult += mult_adj;
tk->xtime_interval += interval;
tk->tkr.xtime_nsec -= offset;
@@ -1397,7 +1401,8 @@ static void timekeeping_adjust(struct timekeeper *tk, s64 offset)
}
if (unlikely(tk->tkr.clock->maxadj &&
(tk->tkr.mult > tk->tkr.clock->mult + tk->tkr.clock->maxadj))) {
(abs(tk->tkr.mult - tk->tkr.clock->mult)
> tk->tkr.clock->maxadj))) {
printk_once(KERN_WARNING
"Adjusting %s more than 11%% (%ld vs %ld)\n",
tk->tkr.clock->name, (long)tk->tkr.mult,
@@ -1646,7 +1651,7 @@ struct timespec current_kernel_time(void)
}
EXPORT_SYMBOL(current_kernel_time);
struct timespec get_monotonic_coarse(void)
struct timespec64 get_monotonic_coarse64(void)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 now, mono;
@@ -1662,7 +1667,7 @@ struct timespec get_monotonic_coarse(void)
set_normalized_timespec64(&now, now.tv_sec + mono.tv_sec,
now.tv_nsec + mono.tv_nsec);
return timespec64_to_timespec(now);
return now;
}
/*