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

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
  ...

4 files changed, 62 insertions, 7 deletions

diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index 597a1e836f22..31ce435981fe 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -234,13 +234,10 @@ static inline int tick_check_broadcast_expired(void) { return 0; }
 static inline void tick_setup_hrtimer_broadcast(void) { }
 # endif
 
-extern int clockevents_notify(unsigned long reason, void *arg);
-
 #else /* !CONFIG_GENERIC_CLOCKEVENTS: */
 
 static inline void clockevents_suspend(void) { }
 static inline void clockevents_resume(void) { }
-static inline int clockevents_notify(unsigned long reason, void *arg) { return 0; }
 static inline int tick_check_broadcast_expired(void) { return 0; }
 static inline void tick_setup_hrtimer_broadcast(void) { }
 
diff --git a/include/linux/jiffies.h b/include/linux/jiffies.h
index 9ea50da73513..5fdc55312334 100644
--- a/include/linux/jiffies.h
+++ b/include/linux/jiffies.h
@@ -409,9 +409,25 @@ static __always_inline unsigned long usecs_to_jiffies(const unsigned int u)
         }
 }
 
-extern unsigned long timespec_to_jiffies(const struct timespec *value);
-extern void jiffies_to_timespec(const unsigned long jiffies,
-                                struct timespec *value);
+extern unsigned long timespec64_to_jiffies(const struct timespec64 *value);
+extern void jiffies_to_timespec64(const unsigned long jiffies,
+                                  struct timespec64 *value);
+static inline unsigned long timespec_to_jiffies(const struct timespec *value)
+{
+        struct timespec64 ts = timespec_to_timespec64(*value);
+
+        return timespec64_to_jiffies(&ts);
+}
+
+static inline void jiffies_to_timespec(const unsigned long jiffies,
+                                       struct timespec *value)
+{
+        struct timespec64 ts;
+
+        jiffies_to_timespec64(jiffies, &ts);
+        *value = timespec64_to_timespec(ts);
+}
+
 extern unsigned long timeval_to_jiffies(const struct timeval *value);
 extern void jiffies_to_timeval(const unsigned long jiffies,
                                struct timeval *value);
diff --git a/include/linux/time64.h b/include/linux/time64.h
index 77b5df2acd2a..367d5af899e8 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -12,11 +12,18 @@ typedef __s64 time64_t;
  */
 #if __BITS_PER_LONG == 64
 # define timespec64 timespec
+#define itimerspec64 itimerspec
 #else
 struct timespec64 {
         time64_t        tv_sec;                 /* seconds */
         long            tv_nsec;                /* nanoseconds */
 };
+
+struct itimerspec64 {
+        struct timespec64 it_interval;
+        struct timespec64 it_value;
+};
+
 #endif
 
 /* Parameters used to convert the timespec values: */
@@ -45,6 +52,16 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
         return ts;
 }
 
+static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64)
+{
+        return *its64;
+}
+
+static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its)
+{
+        return *its;
+}
+
 # define timespec64_equal               timespec_equal
 # define timespec64_compare             timespec_compare
 # define set_normalized_timespec64      set_normalized_timespec
@@ -77,6 +94,24 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
         return ret;
 }
 
+static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64)
+{
+        struct itimerspec ret;
+
+        ret.it_interval = timespec64_to_timespec(its64->it_interval);
+        ret.it_value = timespec64_to_timespec(its64->it_value);
+        return ret;
+}
+
+static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its)
+{
+        struct itimerspec64 ret;
+
+        ret.it_interval = timespec_to_timespec64(its->it_interval);
+        ret.it_value = timespec_to_timespec64(its->it_value);
+        return ret;
+}
+
 static inline int timespec64_equal(const struct timespec64 *a,
                                    const struct timespec64 *b)
 {
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 6e191e4e6ab6..ba0ae09cbb21 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -18,10 +18,17 @@ extern int do_sys_settimeofday(const struct timespec *tv,
  * Kernel time accessors
  */
 unsigned long get_seconds(void);
-struct timespec current_kernel_time(void);
+struct timespec64 current_kernel_time64(void);
 /* does not take xtime_lock */
 struct timespec __current_kernel_time(void);
 
+static inline struct timespec current_kernel_time(void)
+{
+        struct timespec64 now = current_kernel_time64();
+
+        return timespec64_to_timespec(now);
+}
+
 /*
  * timespec based interfaces
  */