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authorThomas Gleixner <tglx@linutronix.de>2012-04-10 11:14:55 +0200
committerIngo Molnar <mingo@kernel.org>2013-02-19 08:43:16 +0100
commita6c0c943a15d0b3d6ac33760cb8f95c75f395895 (patch)
tree0aa3e39340a97d865a3ce9c4f79e2ac3a389ef04 /kernel/time/ntp.c
parent066361a7c58cb6c8b18c7ce0ee8527bb1ce58460 (diff)
downloadlinux-a6c0c943a15d0b3d6ac33760cb8f95c75f395895.tar.bz2
ntp: Make ntp_lock raw
seconds_overflow() is called from hard interrupt context even on Preempt-RT. This requires the lock to be a raw_spinlock. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/ntp.c')
-rw-r--r--kernel/time/ntp.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 24174b4d669b..bb1edfaafe3d 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -22,7 +22,7 @@
* NTP timekeeping variables:
*/
-DEFINE_SPINLOCK(ntp_lock);
+DEFINE_RAW_SPINLOCK(ntp_lock);
/* USER_HZ period (usecs): */
@@ -347,7 +347,7 @@ 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 +361,7 @@ 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 +371,9 @@ 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 +394,7 @@ 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
@@ -478,7 +478,7 @@ 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;
}
@@ -660,7 +660,7 @@ 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 +702,7 @@ 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 +900,7 @@ 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 +913,7 @@ 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 +928,7 @@ 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 +945,7 @@ 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);