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>
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c
index 7bbc26a..ba795a4 100644
--- a/drivers/rtc/rtc-lib.c
+++ b/drivers/rtc/rtc-lib.c
@@ -117,85 +117,4 @@
}
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");
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 07ecd4c..6d5e4a4 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -106,7 +106,6 @@
extern int rtc_valid_tm(struct rtc_time *tm);
extern int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time);
extern void rtc_time_to_tm(unsigned long time, struct rtc_time *tm);
-extern void rtc_merge_alarm(struct rtc_time *now, struct rtc_time *alarm);
#include <linux/device.h>
#include <linux/seq_file.h>