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Reset adjtime offset on start

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This commit is contained in:
Miroslav Lichvar 2010-08-05 13:27:52 +02:00
parent 6dcf3238f6
commit 7994b31de4
1 changed files with 21 additions and 12 deletions
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33
sys_linux.c
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@ -678,13 +678,10 @@ get_offset_correction(struct timeval *raw,
if (!slow_slewing) {
offset = 0;
} else {
again:
switch (have_readonly_adjtime) {
case 2:
if (TMX_GetOffsetLeft(&offset) < 0) {
LOG(LOGS_INFO, LOGF_SysLinux, "adjtimex() doesn't support ADJ_OFFSET_SS_READ");
have_readonly_adjtime = 0;
goto again;
CROAK("adjtimex() failed in get_offset_correction");
}
break;
case 0:
@ -933,18 +930,18 @@ get_version_specific_details(void)
have_readonly_adjtime = 0;
break;
}
/* Let's be optimistic that these will be the same until proven
otherwise :-) */
case 7:
case 8:
/* These don't need scaling */
freq_scale = 1.0;
have_readonly_adjtime = 2;
if (minor == 6 && patch < 33) {
if (patch < 33) {
/* Tickless kernels before 2.6.33 accumulated ticks only in
half-second intervals. */
tick_update_hz = 2;
}
/* Let's be optimistic that these will be the same until proven
otherwise :-) */
case 7:
case 8:
/* These don't seem to need scaling */
freq_scale = 1.0;
have_readonly_adjtime = 2;
break;
default:
LOG_FATAL(LOGF_SysLinux, "Kernel version not supported yet, sorry.");
@ -971,6 +968,8 @@ get_version_specific_details(void)
void
SYS_Linux_Initialise(void)
{
long offset;
offset_register = 0.0;
fast_slewing = 0;
@ -983,6 +982,16 @@ SYS_Linux_Initialise(void)
accrue_offset, apply_step_offset,
get_offset_correction, set_leap);
offset = 0;
if (TMX_ApplyOffset(&offset) < 0) {
CROAK("adjtimex() failed in initialise");
}
if (have_readonly_adjtime == 2 && (TMX_GetOffsetLeft(&offset) < 0 || offset)) {
LOG(LOGS_INFO, LOGF_SysLinux, "adjtimex() doesn't support ADJ_OFFSET_SS_READ");
have_readonly_adjtime = 0;
}
TMX_SetSync(CNF_GetRTCSync());
}