Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (34 commits)
  time: Prevent 32 bit overflow with set_normalized_timespec()
  clocksource: Delay clocksource down rating to late boot
  clocksource: clocksource_select must be called with mutex locked
  clocksource: Resolve cpu hotplug dead lock with TSC unstable, fix crash
  timers: Drop a function prototype
  clocksource: Resolve cpu hotplug dead lock with TSC unstable
  timer.c: Fix S/390 comments
  timekeeping: Fix invalid getboottime() value
  timekeeping: Fix up read_persistent_clock() breakage on sh
  timekeeping: Increase granularity of read_persistent_clock(), build fix
  time: Introduce CLOCK_REALTIME_COARSE
  x86: Do not unregister PIT clocksource on PIT oneshot setup/shutdown
  clocksource: Avoid clocksource watchdog circular locking dependency
  clocksource: Protect the watchdog rating changes with clocksource_mutex
  clocksource: Call clocksource_change_rating() outside of watchdog_lock
  timekeeping: Introduce read_boot_clock
  timekeeping: Increase granularity of read_persistent_clock()
  timekeeping: Update clocksource with stop_machine
  timekeeping: Add timekeeper read_clock helper functions
  timekeeping: Move NTP adjusted clock multiplier to struct timekeeper
  ...

Fix trivial conflict due to MIPS lemote -> loongson renaming.

1 files changed, 10 insertions, 28 deletions

diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index e3dc28b8075d..34162a0b2caa 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -184,12 +184,14 @@ static void timing_alert_interrupt(__u16 code)
 static void etr_reset(void);
 static void stp_reset(void);
 
-unsigned long read_persistent_clock(void)
+void read_persistent_clock(struct timespec *ts)
 {
-        struct timespec ts;
+        tod_to_timeval(get_clock() - TOD_UNIX_EPOCH, ts);
+}
 
-        tod_to_timeval(get_clock() - TOD_UNIX_EPOCH, &ts);
-        return ts.tv_sec;
+void read_boot_clock(struct timespec *ts)
+{
+        tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, ts);
 }
 
 static cycle_t read_tod_clock(struct clocksource *cs)
@@ -207,6 +209,10 @@ static struct clocksource clocksource_tod = {
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
+struct clocksource * __init clocksource_default_clock(void)
+{
+        return &clocksource_tod;
+}
 
 void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
 {
@@ -244,10 +250,6 @@ void update_vsyscall_tz(void)
  */
 void __init time_init(void)
 {
-        struct timespec ts;
-        unsigned long flags;
-        cycle_t now;
-
         /* Reset time synchronization interfaces. */
         etr_reset();
         stp_reset();
@@ -263,26 +265,6 @@ void __init time_init(void)
         if (clocksource_register(&clocksource_tod) != 0)
                 panic("Could not register TOD clock source");
 
-        /*
-         * The TOD clock is an accurate clock. The xtime should be
-         * initialized in a way that the difference between TOD and
-         * xtime is reasonably small. Too bad that timekeeping_init
-         * sets xtime.tv_nsec to zero. In addition the clock source
-         * change from the jiffies clock source to the TOD clock
-         * source add another error of up to 1/HZ second. The same
-         * function sets wall_to_monotonic to a value that is too
-         * small for /proc/uptime to be accurate.
-         * Reset xtime and wall_to_monotonic to sane values.
-         */
-        write_seqlock_irqsave(&xtime_lock, flags);
-        now = get_clock();
-        tod_to_timeval(now - TOD_UNIX_EPOCH, &xtime);
-        clocksource_tod.cycle_last = now;
-        clocksource_tod.raw_time = xtime;
-        tod_to_timeval(sched_clock_base_cc - TOD_UNIX_EPOCH, &ts);
-        set_normalized_timespec(&wall_to_monotonic, -ts.tv_sec, -ts.tv_nsec);
-        write_sequnlock_irqrestore(&xtime_lock, flags);
-
         /* Enable TOD clock interrupts on the boot cpu. */
         init_cpu_timer();