diff options
author | Andrew Morton <akpm@linux-foundation.org> | 2007-05-08 00:34:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:18 -0700 |
commit | 416ce32e704d778c283f2f86cadd836cd5d3696c (patch) | |
tree | ede7fe08271e40367d228ef4b7a79eba68030ad4 /drivers/rtc | |
parent | 19bfe37caa8184768ecc15269302f42036625259 (diff) |
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 <scottwood@freescale.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r-- | drivers/rtc/rtc-lib.c | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c index 7bbc26a34bd..ba795a4db1e 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"); |