Commit 41fbf3b3 authored Dec 17, 2014 by Chunyan Zhang Committed by Thomas Gleixner Jan 23, 2015

ktime.h: Introduce ktime_ms_delta

This patch adds a reusable time difference function which returns the
difference in millisecond, as often used in some driver code, e.g.
mtd/test, media/rc, etc.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: Arnd Bergmann <arnd@linaro.org>
Cc: zhang.lyra@gmail.com
Cc: davem@davemloft.net
Cc: john.stultz@linaro.org
Cc: dborkman@redhat.com
Link: http://lkml.kernel.org/r/1418793095-18780-1-git-send-email-zhang.chunyan@linaro.org

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent ec6f34e5

include/linux/ktime.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -186,6 +186,11 @@ static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
		return ktime_to_us(ktime_sub(later, earlier));
		}

		static inline s64 ktime_ms_delta(const ktime_t later, const ktime_t earlier)
		{
		return ktime_to_ms(ktime_sub(later, earlier));
		}

		static inline ktime_t ktime_add_us(const ktime_t kt, const u64 usec)
		{
		return ktime_add_ns(kt, usec * NSEC_PER_USEC);