linux-kernel - [tip:timers/core] ktime.h: Introduce ktime_ms

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Message-ID: <tip-41fbf3b39d5eca01527338b4d0ee15ee1ae1023c@git.kernel.org>
Date:	Fri, 23 Jan 2015 02:48:39 -0800
From:	tip-bot for Chunyan Zhang <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	arnd@...aro.org, linux-kernel@...r.kernel.org, hpa@...or.com,
	zhang.chunyan@...aro.org, mingo@...nel.org, tglx@...utronix.de
Subject: [tip:timers/core] ktime.h: Introduce ktime_ms_delta

Commit-ID:  41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
Gitweb:     http://git.kernel.org/tip/41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
Author:     Chunyan Zhang <zhang.chunyan@...aro.org>
AuthorDate: Wed, 17 Dec 2014 13:11:35 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 23 Jan 2015 11:47:15 +0100

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>
Acked-by: Arnd Bergmann <arnd@...aro.org>
Cc: zhang.lyra@...il.com
Cc: davem@...emloft.net
Cc: john.stultz@...aro.org
Cc: dborkman@...hat.com
Link: http://lkml.kernel.org/r/1418793095-18780-1-git-send-email-zhang.chunyan@linaro.org
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 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);
--
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