From: Xunlei Pang <[email protected]> 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 <[email protected]> Signed-off-by: Xunlei Pang <[email protected]> --- v2->v3: Respin rtc_tm_subtract() to rtc_tm_sub() using "static inline". include/linux/rtc.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/rtc.h b/include/linux/rtc.h index 8dcf682..f46f765 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -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(). */ -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
