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authorThomas Gleixner <tglx@linutronix.de>2007-07-21 07:37:37 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-21 20:49:15 -0400
commit82644459c592a28a3eab682f9b88d81019ddfe8b (patch)
tree738e4edaf54658912e78a8bcdadc3e2165ecb77a /arch/i386/kernel/time.c
parent99bc2fcb283852931fb6bbef40f3df8316b59000 (diff)
NTP: move the cmos update code into ntp.c
i386 and sparc64 have the identical code to update the cmos clock. Move it into kernel/time/ntp.c as there are other architectures coming along with the same requirements. [akpm@linux-foundation.org: build fixes] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: David Miller <davem@davemloft.net> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/i386/kernel/time.c')
-rw-r--r--arch/i386/kernel/time.c50
1 files changed, 2 insertions, 48 deletions
diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index a665df61f08..19a6c678d02 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -207,55 +207,9 @@ unsigned long read_persistent_clock(void)
207 return retval; 207 return retval;
208} 208}
209 209
210static void sync_cmos_clock(unsigned long dummy); 210int update_persistent_clock(struct timespec now)
211
212static DEFINE_TIMER(sync_cmos_timer, sync_cmos_clock, 0, 0);
213int no_sync_cmos_clock;
214
215static void sync_cmos_clock(unsigned long dummy)
216{
217 struct timeval now, next;
218 int fail = 1;
219
220 /*
221 * If we have an externally synchronized Linux clock, then update
222 * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
223 * called as close as possible to 500 ms before the new second starts.
224 * This code is run on a timer. If the clock is set, that timer
225 * may not expire at the correct time. Thus, we adjust...
226 */
227 if (!ntp_synced())
228 /*
229 * Not synced, exit, do not restart a timer (if one is
230 * running, let it run out).
231 */
232 return;
233
234 do_gettimeofday(&now);
235 if (now.tv_usec >= USEC_AFTER - ((unsigned) TICK_SIZE) / 2 &&
236 now.tv_usec <= USEC_BEFORE + ((unsigned) TICK_SIZE) / 2)
237 fail = set_rtc_mmss(now.tv_sec);
238
239 next.tv_usec = USEC_AFTER - now.tv_usec;
240 if (next.tv_usec <= 0)
241 next.tv_usec += USEC_PER_SEC;
242
243 if (!fail)
244 next.tv_sec = 659;
245 else
246 next.tv_sec = 0;
247
248 if (next.tv_usec >= USEC_PER_SEC) {
249 next.tv_sec++;
250 next.tv_usec -= USEC_PER_SEC;
251 }
252 mod_timer(&sync_cmos_timer, jiffies + timeval_to_jiffies(&next));
253}
254
255void notify_arch_cmos_timer(void)
256{ 211{
257 if (!no_sync_cmos_clock) 212 return set_rtc_mmss(now.tv_sec);
258 mod_timer(&sync_cmos_timer, jiffies + 1);
259} 213}
260 214
261extern void (*late_time_init)(void); 215extern void (*late_time_init)(void);