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

Pull time(r) updates from Thomas Gleixner:
 "A small set of updates for timers and timekeeping:

   - The most interesting change is the consolidation of clock MONOTONIC
     and clock BOOTTIME.

     Clock MONOTONIC behaves now exactly like clock BOOTTIME and does
     not longer ignore the time spent in suspend. A new clock
     MONOTONIC_ACTIVE is provived which behaves like clock MONOTONIC in
     kernels before this change. This allows applications to
     programmatically check for the clock MONOTONIC behaviour.

     As discussed in the review thread, this has the potential of
     breaking user space and we might have to revert this. Knock on wood
     that we can avoid that exercise.

   - Updates to the NTP mechanism to improve accuracy

   - A new kernel internal data structure to aid the ongoing Y2038 work.

   - Cleanups and simplifications of the clocksource code.

   - Make the alarmtimer code play nicely with debugobjects"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  alarmtimer: Init nanosleep alarm timer on stack
  y2038: Introduce struct __kernel_old_timeval
  tracing: Unify the "boot" and "mono" tracing clocks
  hrtimer: Unify MONOTONIC and BOOTTIME clock behavior
  posix-timers: Unify MONOTONIC and BOOTTIME clock behavior
  timekeeping: Remove boot time specific code
  Input: Evdev - unify MONOTONIC and BOOTTIME clock behavior
  timekeeping: Make the MONOTONIC clock behave like the BOOTTIME clock
  timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock
  timekeeping/ntp: Determine the multiplier directly from NTP tick length
  timekeeping/ntp: Don't align NTP frequency adjustments to ticks
  clocksource: Use ATTRIBUTE_GROUPS
  clocksource: Use DEVICE_ATTR_RW/RO/WO to define device attributes
  clocksource: Don't walk the clocksource list for empty override

5 files changed, 30 insertions, 27 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index c7902ca7c9f4..78f456fcd242 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -161,11 +161,9 @@ struct hrtimer_clock_base {
 enum  hrtimer_base_type {
 	HRTIMER_BASE_MONOTONIC,
 	HRTIMER_BASE_REALTIME,
-	HRTIMER_BASE_BOOTTIME,
 	HRTIMER_BASE_TAI,
 	HRTIMER_BASE_MONOTONIC_SOFT,
 	HRTIMER_BASE_REALTIME_SOFT,
-	HRTIMER_BASE_BOOTTIME_SOFT,
 	HRTIMER_BASE_TAI_SOFT,
 	HRTIMER_MAX_CLOCK_BASES,
 };
diff --git a/include/linux/time32.h b/include/linux/time32.h
index 65b1de25198d..d2bcd4377b56 100644
--- a/include/linux/time32.h
+++ b/include/linux/time32.h
@@ -217,5 +217,6 @@ static inline s64 timeval_to_ns(const struct timeval *tv)
  * Returns the timeval representation of the nsec parameter.
  */
 extern struct timeval ns_to_timeval(const s64 nsec);
+extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec);
 
 #endif
diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index d315c3d6725c..4b3dca173e89 100644
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -52,6 +52,7 @@ struct tk_read_base {
  * @offs_real:		Offset clock monotonic -> clock realtime
  * @offs_boot:		Offset clock monotonic -> clock boottime
  * @offs_tai:		Offset clock monotonic -> clock tai
+ * @time_suspended:	Accumulated suspend time
  * @tai_offset:		The current UTC to TAI offset in seconds
  * @clock_was_set_seq:	The sequence number of clock was set events
  * @cs_was_changed_seq:	The sequence number of clocksource change events
@@ -94,6 +95,7 @@ struct timekeeper {
 	ktime_t			offs_real;
 	ktime_t			offs_boot;
 	ktime_t			offs_tai;
+	ktime_t			time_suspended;
 	s32			tai_offset;
 	unsigned int		clock_was_set_seq;
 	u8			cs_was_changed_seq;
@@ -117,6 +119,8 @@ struct timekeeper {
 	s64			ntp_error;
 	u32			ntp_error_shift;
 	u32			ntp_err_mult;
+	/* Flag used to avoid updating NTP twice with same second */
+	u32			skip_second_overflow;
 #ifdef CONFIG_DEBUG_TIMEKEEPING
 	long			last_warning;
 	/*
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index b17bcce58bc4..82c219dfd3bb 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -32,20 +32,25 @@ extern void getrawmonotonic64(struct timespec64 *ts);
 extern void ktime_get_ts64(struct timespec64 *ts);
 extern time64_t ktime_get_seconds(void);
 extern time64_t ktime_get_real_seconds(void);
+extern void ktime_get_active_ts64(struct timespec64 *ts);
 
 extern int __getnstimeofday64(struct timespec64 *tv);
 extern void getnstimeofday64(struct timespec64 *tv);
 extern void getboottime64(struct timespec64 *ts);
 
-#define ktime_get_real_ts64(ts)	getnstimeofday64(ts)
+#define ktime_get_real_ts64(ts)		getnstimeofday64(ts)
+
+/* Clock BOOTTIME compatibility wrappers */
+static inline void get_monotonic_boottime64(struct timespec64 *ts)
+{
+	ktime_get_ts64(ts);
+}
 
 /*
  * ktime_t based interfaces
  */
-
 enum tk_offsets {
 	TK_OFFS_REAL,
-	TK_OFFS_BOOT,
 	TK_OFFS_TAI,
 	TK_OFFS_MAX,
 };
@@ -56,6 +61,10 @@ extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
 extern ktime_t ktime_get_raw(void);
 extern u32 ktime_get_resolution_ns(void);
 
+/* Clock BOOTTIME compatibility wrappers */
+static inline ktime_t ktime_get_boottime(void) { return ktime_get(); }
+static inline u64 ktime_get_boot_ns(void) { return ktime_get(); }
+
 /**
  * ktime_get_real - get the real (wall-) time in ktime_t format
  */
@@ -65,17 +74,6 @@ static inline ktime_t ktime_get_real(void)
 }
 
 /**
- * ktime_get_boottime - Returns monotonic time since boot in ktime_t format
- *
- * This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
- * time spent in suspend.
- */
-static inline ktime_t ktime_get_boottime(void)
-{
-	return ktime_get_with_offset(TK_OFFS_BOOT);
-}
-
-/**
  * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
  */
 static inline ktime_t ktime_get_clocktai(void)
@@ -101,11 +99,6 @@ static inline u64 ktime_get_real_ns(void)
 	return ktime_to_ns(ktime_get_real());
 }
 
-static inline u64 ktime_get_boot_ns(void)
-{
-	return ktime_to_ns(ktime_get_boottime());
-}
-
 static inline u64 ktime_get_tai_ns(void)
 {
 	return ktime_to_ns(ktime_get_clocktai());
@@ -118,17 +111,11 @@ static inline u64 ktime_get_raw_ns(void)
 
 extern u64 ktime_get_mono_fast_ns(void);
 extern u64 ktime_get_raw_fast_ns(void);
-extern u64 ktime_get_boot_fast_ns(void);
 extern u64 ktime_get_real_fast_ns(void);
 
 /*
  * timespec64 interfaces utilizing the ktime based ones
  */
-static inline void get_monotonic_boottime64(struct timespec64 *ts)
-{
-	*ts = ktime_to_timespec64(ktime_get_boottime());
-}
-
 static inline void timekeeping_clocktai64(struct timespec64 *ts)
 {
 	*ts = ktime_to_timespec64(ktime_get_clocktai());
diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h
index 53f8dd84beb5..16a296612ba4 100644
--- a/include/uapi/linux/time.h
+++ b/include/uapi/linux/time.h
@@ -43,6 +43,18 @@ struct itimerval {
 };
 
 /*
+ * legacy timeval structure, only embedded in structures that
+ * traditionally used 'timeval' to pass time intervals (not absolute
+ * times). Do not add new users. If user space fails to compile
+ * here, this is probably because it is not y2038 safe and needs to
+ * be changed to use another interface.
+ */
+struct __kernel_old_timeval {
+	__kernel_long_t tv_sec;
+	__kernel_long_t tv_usec;
+};
+
+/*
  * The IDs of the various system clocks (for POSIX.1b interval timers):
  */
 #define CLOCK_REALTIME			0
@@ -61,6 +73,7 @@ struct itimerval {
  */
 #define CLOCK_SGI_CYCLE			10
 #define CLOCK_TAI			11
+#define CLOCK_MONOTONIC_ACTIVE		12
 
 #define MAX_CLOCKS			16
 #define CLOCKS_MASK			(CLOCK_REALTIME | CLOCK_MONOTONIC)