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| author | john stultz <johnstul@us.ibm.com> | 2005-09-06 15:17:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-07 16:57:34 -0700 |
| commit | b149ee2233edf08fb59b11e879a2c5941929bcb8 (patch) | |
| tree | 4ee8e066c4d69ac98afc37ab0ab62ae54271ce02 /include/linux/timex.h | |
| parent | 6c231b7bab0aa6860cd9da2de8a064eddc34c146 (diff) | |
| download | linux-b149ee2233edf08fb59b11e879a2c5941929bcb8.tar.gz linux-b149ee2233edf08fb59b11e879a2c5941929bcb8.tar.bz2 linux-b149ee2233edf08fb59b11e879a2c5941929bcb8.zip | |
[PATCH] NTP: ntp-helper functions
This patch cleans up a commonly repeated set of changes to the NTP state
variables by adding two helper inline functions:
ntp_clear(): Clears the ntp state variables
ntp_synced(): Returns 1 if the system is synced with a time server.
This was compile tested for alpha, arm, i386, x86-64, ppc64, s390, sparc,
sparc64.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/timex.h')
| -rw-r--r-- | include/linux/timex.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h index 74fdd07d3792..7e050a2cc35b 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -260,6 +260,29 @@ extern long pps_calcnt; /* calibration intervals */ extern long pps_errcnt; /* calibration errors */ extern long pps_stbcnt; /* stability limit exceeded */ +/** + * ntp_clear - Clears the NTP state variables + * + * Must be called while holding a write on the xtime_lock + */ +static inline void ntp_clear(void) +{ + time_adjust = 0; /* stop active adjtime() */ + time_status |= STA_UNSYNC; + time_maxerror = NTP_PHASE_LIMIT; + time_esterror = NTP_PHASE_LIMIT; +} + +/** + * ntp_synced - Returns 1 if the NTP status is not UNSYNC + * + */ +static inline int ntp_synced(void) +{ + return !(time_status & STA_UNSYNC); +} + + #ifdef CONFIG_TIME_INTERPOLATION #define TIME_SOURCE_CPU 0 |