From 416ce32e704d778c283f2f86cadd836cd5d3696c Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Tue, 8 May 2007 00:34:05 -0700 Subject: revert "rtc: Add rtc_merge_alarm()" David says "884b4aaaa242a2db8c8252796f0118164a680ab5 should be reverted. It added an rtc_merge_alarm() call to the 2.6.20 kernel, which hasn't yet been used by any in-tree driver; this patch obviates the need for that call, and uses a more robust approach." Cc: Scott Wood Cc: Alessandro Zummo Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/rtc/rtc-lib.c | 81 --------------------------------------------------- 1 file changed, 81 deletions(-) (limited to 'drivers') diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index 7bbc26a34bd2..ba795a4db1e9 100644 --- a/drivers/rtc/rtc-lib.c +++ b/drivers/rtc/rtc-lib.c @@ -117,85 +117,4 @@ int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) } EXPORT_SYMBOL(rtc_tm_to_time); - -/* Merge the valid (i.e. non-negative) fields of alarm into the current - * time. If the valid alarm fields are earlier than the equivalent - * fields in the time, carry one into the least significant invalid - * field, so that the alarm expiry is in the future. It assumes that the - * least significant invalid field is more significant than the most - * significant valid field, and that the seconds field is valid. - * - * This is used by alarms that take relative (rather than absolute) - * times, and/or have a simple binary second counter instead of - * day/hour/minute/sec registers. - */ -void rtc_merge_alarm(struct rtc_time *now, struct rtc_time *alarm) -{ - int *alarmp = &alarm->tm_sec; - int *timep = &now->tm_sec; - int carry_into, i; - - /* Ignore everything past the 6th element (tm_year). */ - for (i = 5; i > 0; i--) { - if (alarmp[i] < 0) - alarmp[i] = timep[i]; - else - break; - } - - /* No carry needed if all fields are valid. */ - if (i == 5) - return; - - for (carry_into = i + 1; i >= 0; i--) { - if (alarmp[i] < timep[i]) - break; - - if (alarmp[i] > timep[i]) - return; - } - - switch (carry_into) { - case 1: - alarm->tm_min++; - - if (alarm->tm_min < 60) - return; - - alarm->tm_min = 0; - /* fall-through */ - - case 2: - alarm->tm_hour++; - - if (alarm->tm_hour < 60) - return; - - alarm->tm_hour = 0; - /* fall-through */ - - case 3: - alarm->tm_mday++; - - if (alarm->tm_mday <= rtc_days_in_month[alarm->tm_mon]) - return; - - alarm->tm_mday = 1; - /* fall-through */ - - case 4: - alarm->tm_mon++; - - if (alarm->tm_mon <= 12) - return; - - alarm->tm_mon = 1; - /* fall-through */ - - case 5: - alarm->tm_year++; - } -} -EXPORT_SYMBOL(rtc_merge_alarm); - MODULE_LICENSE("GPL"); -- cgit v1.2.3-58-ga151