diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/ntp.c | 41 |
1 files changed, 4 insertions, 37 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index a331ebc32e2..12ff13a838c 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -22,10 +22,10 @@ /* * NTP timekeeping variables: + * + * Note: All of the NTP state is protected by the timekeeping locks. */ -DEFINE_RAW_SPINLOCK(ntp_lock); - /* USER_HZ period (usecs): */ unsigned long tick_usec = TICK_USEC; @@ -132,8 +132,6 @@ static inline void pps_reset_freq_interval(void) /** * pps_clear - Clears the PPS state variables - * - * Must be called while holding a write on the ntp_lock */ static inline void pps_clear(void) { @@ -148,8 +146,6 @@ static inline void pps_clear(void) /* Decrease pps_valid to indicate that another second has passed since * the last PPS signal. When it reaches 0, indicate that PPS signal is * missing. - * - * Must be called while holding a write on the ntp_lock */ static inline void pps_dec_valid(void) { @@ -344,10 +340,6 @@ static void ntp_update_offset(long offset) */ void ntp_clear(void) { - unsigned long flags; - - raw_spin_lock_irqsave(&ntp_lock, flags); - time_adjust = 0; /* stop active adjtime() */ time_status |= STA_UNSYNC; time_maxerror = NTP_PHASE_LIMIT; @@ -360,20 +352,12 @@ void ntp_clear(void) /* Clear PPS state variables */ pps_clear(); - raw_spin_unlock_irqrestore(&ntp_lock, flags); - } u64 ntp_tick_length(void) { - unsigned long flags; - s64 ret; - - raw_spin_lock_irqsave(&ntp_lock, flags); - ret = tick_length; - raw_spin_unlock_irqrestore(&ntp_lock, flags); - return ret; + return tick_length; } @@ -391,9 +375,6 @@ int second_overflow(unsigned long secs) { s64 delta; int leap = 0; - unsigned long flags; - - raw_spin_lock_irqsave(&ntp_lock, flags); /* * Leap second processing. If in leap-insert state at the end of the @@ -475,8 +456,6 @@ int second_overflow(unsigned long secs) time_adjust = 0; out: - raw_spin_unlock_irqrestore(&ntp_lock, flags); - return leap; } @@ -571,10 +550,7 @@ static inline void process_adj_status(struct timex *txc, struct timespec *ts) time_status |= txc->status & ~STA_RONLY; } -/* - * Called with ntp_lock held, so we can access and modify - * all the global NTP state: - */ + static inline void process_adjtimex_modes(struct timex *txc, struct timespec *ts, s32 *time_tai) @@ -666,8 +642,6 @@ int __do_adjtimex(struct timex *txc, struct timespec *ts, s32 *time_tai) { int result; - raw_spin_lock_irq(&ntp_lock); - if (txc->modes & ADJ_ADJTIME) { long save_adjust = time_adjust; @@ -708,8 +682,6 @@ int __do_adjtimex(struct timex *txc, struct timespec *ts, s32 *time_tai) /* fill PPS status fields */ pps_fill_timex(txc); - raw_spin_unlock_irq(&ntp_lock); - txc->time.tv_sec = ts->tv_sec; txc->time.tv_usec = ts->tv_nsec; if (!(time_status & STA_NANO)) @@ -906,8 +878,6 @@ void __hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts) pts_norm = pps_normalize_ts(*phase_ts); - 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); @@ -919,7 +889,6 @@ 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; - raw_spin_unlock_irqrestore(&ntp_lock, flags); return; } @@ -934,7 +903,6 @@ 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; - raw_spin_unlock_irqrestore(&ntp_lock, flags); pr_err("hardpps: PPSJITTER: bad pulse\n"); return; } @@ -951,7 +919,6 @@ void __hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts) hardpps_update_phase(pts_norm.nsec); - raw_spin_unlock_irqrestore(&ntp_lock, flags); } #endif /* CONFIG_NTP_PPS */ |