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Message-Id: <1418793095-18780-1-git-send-email-zhang.chunyan@linaro.org>
Date:	Wed, 17 Dec 2014 13:11:35 +0800
From:	Chunyan Zhang <zhang.chunyan@...aro.org>
To:	tglx@...utronix.de, davem@...emloft.net, john.stultz@...aro.org,
	dborkman@...hat.com
Cc:	arnd@...aro.org, linux-kernel@...r.kernel.org, zhang.lyra@...il.com
Subject: [PATCH] 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@...aro.org>
---
 include/linux/ktime.h |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index c9d645a..891ea92 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -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);
-- 
1.7.9.5

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