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

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

4 files changed, 41 insertions, 40 deletions

diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index 7347426fa68d..f622cf28628a 100644
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -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
 
diff --git a/kernel/time/udelay_test.c b/kernel/time/test_udelay.c
index e622ba365a13..e622ba365a13 100644
--- a/kernel/time/udelay_test.c
+++ b/kernel/time/test_udelay.c
diff --git a/kernel/time/time.c b/kernel/time/time.c
index a9ae20fb0b11..65015ff2f07c 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -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
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index ec1791fae965..2dc0646258ae 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -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;
 }
 
 /*