Commit 92000257 authored Jun 12, 2015 by Xunlei Pang Committed by Alexandre Belloni Jun 25, 2015

rtc: Introduce rtc_tm_sub() helper function



There're many sites need comparing the two rtc_time variants for many
rtc drivers, especially in the instances of rtc_class_ops::set_alarm().

So add this common helper function to make things easy.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

parent 626fea04

include/linux/rtc.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,14 @@ extern void rtc_time64_to_tm(time64_t time, struct rtc_time *tm);
		ktime_t rtc_tm_to_ktime(struct rtc_time tm);
		struct rtc_time rtc_ktime_to_tm(ktime_t kt);

		/*
		* rtc_tm_sub - Return the difference in seconds.
		*/
		static inline time64_t rtc_tm_sub(struct rtc_time lhs, struct rtc_time rhs)
		{
		return rtc_tm_to_time64(lhs) - rtc_tm_to_time64(rhs);
		}

		/**
		* Deprecated. Use rtc_time64_to_tm().
		*/

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