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| author | John Stultz <john.stultz@linaro.org> | 2011-11-14 13:18:07 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2012-01-26 19:44:23 -0800 |
| commit | ea7cf49a7633c2b70125f59b4e3553d9181cb15d (patch) | |
| tree | 877bca59752e387e93fc030079afc28515c86edf /kernel | |
| parent | 8357929e6ae3661d5a3a7378a717f29873ea18c6 (diff) | |
| download | linux-ea7cf49a7633c2b70125f59b4e3553d9181cb15d.tar.gz linux-ea7cf49a7633c2b70125f59b4e3553d9181cb15d.tar.bz2 linux-ea7cf49a7633c2b70125f59b4e3553d9181cb15d.zip | |
ntp: Access tick_length variable via ntp_tick_length()
Currently the NTP managed tick_length value is accessed globally,
in preparations for locking cleanups, make sure it is accessed via
a function and mark it as static.
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/ntp.c | 9 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 6 |
2 files changed, 11 insertions, 4 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index ae7e13607d91..f131ba62da62 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -28,7 +28,7 @@ unsigned long tick_usec = TICK_USEC; /* ACTHZ period (nsecs): */ unsigned long tick_nsec; -u64 tick_length; +static u64 tick_length; static u64 tick_length_base; static struct hrtimer leap_timer; @@ -360,6 +360,13 @@ void ntp_clear(void) pps_clear(); } + +u64 ntp_tick_length(void) +{ + return tick_length; +} + + /* * Leap second processing. If in leap-insert state at the end of the * day, the system clock is set back one second; if in leap-delete diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index f5d4d226defb..cdae24655c8d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -811,7 +811,7 @@ static __always_inline int timekeeping_bigadjust(s64 error, s64 *interval, * Now calculate the error in (1 << look_ahead) ticks, but first * remove the single look ahead already included in the error. */ - tick_error = tick_length >> (timekeeper.ntp_error_shift + 1); + tick_error = ntp_tick_length() >> (timekeeper.ntp_error_shift + 1); tick_error -= timekeeper.xtime_interval >> 1; error = ((error - tick_error) >> look_ahead) + tick_error; @@ -994,7 +994,7 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift) timekeeper.raw_time.tv_nsec = raw_nsecs; /* Accumulate error between NTP and clock interval */ - timekeeper.ntp_error += tick_length << shift; + timekeeper.ntp_error += ntp_tick_length() << shift; timekeeper.ntp_error -= (timekeeper.xtime_interval + timekeeper.xtime_remainder) << (timekeeper.ntp_error_shift + shift); @@ -1042,7 +1042,7 @@ static void update_wall_time(void) shift = ilog2(offset) - ilog2(timekeeper.cycle_interval); shift = max(0, shift); /* Bound shift to one less then what overflows tick_length */ - maxshift = (8*sizeof(tick_length) - (ilog2(tick_length)+1)) - 1; + maxshift = (64 - (ilog2(ntp_tick_length())+1)) - 1; shift = min(shift, maxshift); while (offset >= timekeeper.cycle_interval) { offset = logarithmic_accumulation(offset, shift); |