1 files changed, 30 insertions, 18 deletions

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 24174b4d669b..072bb066bb7d 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -15,6 +15,7 @@
 #include <linux/time.h>
 #include <linux/mm.h>
 #include <linux/module.h>
+#include <linux/rtc.h>
 
 #include "tick-internal.h"
 
@@ -22,7 +23,7 @@
  * NTP timekeeping variables:
  */
 
-DEFINE_SPINLOCK(ntp_lock);
+DEFINE_RAW_SPINLOCK(ntp_lock);
 
 
 /* USER_HZ period (usecs): */
@@ -347,7 +348,7 @@ void ntp_clear(void)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&ntp_lock, flags);
+        raw_spin_lock_irqsave(&ntp_lock, flags);
 
         time_adjust     = 0;            /* stop active adjtime() */
         time_status     |= STA_UNSYNC;
@@ -361,7 +362,7 @@ void ntp_clear(void)
 
         /* Clear PPS state variables */
         pps_clear();
-        spin_unlock_irqrestore(&ntp_lock, flags);
+        raw_spin_unlock_irqrestore(&ntp_lock, flags);
 
 }
 
@@ -371,9 +372,9 @@ u64 ntp_tick_length(void)
         unsigned long flags;
         s64 ret;
 
-        spin_lock_irqsave(&ntp_lock, flags);
+        raw_spin_lock_irqsave(&ntp_lock, flags);
         ret = tick_length;
-        spin_unlock_irqrestore(&ntp_lock, flags);
+        raw_spin_unlock_irqrestore(&ntp_lock, flags);
         return ret;
 }
 
@@ -394,7 +395,7 @@ int second_overflow(unsigned long secs)
         int leap = 0;
         unsigned long flags;
 
-        spin_lock_irqsave(&ntp_lock, flags);
+        raw_spin_lock_irqsave(&ntp_lock, flags);
 
         /*
          * Leap second processing. If in leap-insert state at the end of the
@@ -478,13 +479,12 @@ int second_overflow(unsigned long secs)
         time_adjust = 0;
 
 out:
-        spin_unlock_irqrestore(&ntp_lock, flags);
+        raw_spin_unlock_irqrestore(&ntp_lock, flags);
 
         return leap;
 }
 
-#ifdef CONFIG_GENERIC_CMOS_UPDATE
-
+#if defined(CONFIG_GENERIC_CMOS_UPDATE) || defined(CONFIG_RTC_SYSTOHC)
 static void sync_cmos_clock(struct work_struct *work);
 
 static DECLARE_DELAYED_WORK(sync_cmos_work, sync_cmos_clock);
@@ -510,14 +510,26 @@ static void sync_cmos_clock(struct work_struct *work)
         }
 
         getnstimeofday(&now);
-        if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2)
-                fail = update_persistent_clock(now);
+        if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec / 2) {
+                struct timespec adjust = now;
+
+                fail = -ENODEV;
+                if (persistent_clock_is_local)
+                        adjust.tv_sec -= (sys_tz.tz_minuteswest * 60);
+#ifdef CONFIG_GENERIC_CMOS_UPDATE
+                fail = update_persistent_clock(adjust);
+#endif
+#ifdef CONFIG_RTC_SYSTOHC
+                if (fail == -ENODEV)
+                        fail = rtc_set_ntp_time(adjust);
+#endif
+        }
 
         next.tv_nsec = (NSEC_PER_SEC / 2) - now.tv_nsec - (TICK_NSEC / 2);
         if (next.tv_nsec <= 0)
                 next.tv_nsec += NSEC_PER_SEC;
 
-        if (!fail)
+        if (!fail || fail == -ENODEV)
                 next.tv_sec = 659;
         else
                 next.tv_sec = 0;
@@ -660,7 +672,7 @@ int do_adjtimex(struct timex *txc)
 
         getnstimeofday(&ts);
 
-        spin_lock_irq(&ntp_lock);
+        raw_spin_lock_irq(&ntp_lock);
 
         if (txc->modes & ADJ_ADJTIME) {
                 long save_adjust = time_adjust;
@@ -702,7 +714,7 @@ int do_adjtimex(struct timex *txc)
         /* fill PPS status fields */
         pps_fill_timex(txc);
 
-        spin_unlock_irq(&ntp_lock);
+        raw_spin_unlock_irq(&ntp_lock);
 
         txc->time.tv_sec = ts.tv_sec;
         txc->time.tv_usec = ts.tv_nsec;
@@ -900,7 +912,7 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
 
         pts_norm = pps_normalize_ts(*phase_ts);
 
-        spin_lock_irqsave(&ntp_lock, flags);
+        raw_spin_lock_irqsave(&ntp_lock, flags);
 
         /* clear the error bits, they will be set again if needed */
         time_status &= ~(STA_PPSJITTER | STA_PPSWANDER | STA_PPSERROR);
@@ -913,7 +925,7 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
          * just start the frequency interval */
         if (unlikely(pps_fbase.tv_sec == 0)) {
                 pps_fbase = *raw_ts;
-                spin_unlock_irqrestore(&ntp_lock, flags);
+                raw_spin_unlock_irqrestore(&ntp_lock, flags);
                 return;
         }
 
@@ -928,7 +940,7 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
                 time_status |= STA_PPSJITTER;
                 /* restart the frequency calibration interval */
                 pps_fbase = *raw_ts;
-                spin_unlock_irqrestore(&ntp_lock, flags);
+                raw_spin_unlock_irqrestore(&ntp_lock, flags);
                 pr_err("hardpps: PPSJITTER: bad pulse\n");
                 return;
         }
@@ -945,7 +957,7 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
 
         hardpps_update_phase(pts_norm.nsec);
 
-        spin_unlock_irqrestore(&ntp_lock, flags);
+        raw_spin_unlock_irqrestore(&ntp_lock, flags);
 }
 EXPORT_SYMBOL(hardpps);