From: Chunyan Zhang <zhang.chunyan@linaro.org>
To: tglx@linutronix.de, davem@davemloft.net, john.stultz@linaro.org,
dborkman@redhat.com
Cc: arnd@linaro.org, linux-kernel@vger.kernel.org, zhang.lyra@gmail.com
Subject: [PATCH] ktime.h: Introduce ktime_ms_delta
Date: Wed, 17 Dec 2014 13:11:35 +0800 [thread overview]
Message-ID: <1418793095-18780-1-git-send-email-zhang.chunyan@linaro.org> (raw)
In-Reply-To: <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>
---
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
next parent reply other threads:[~2014-12-17 5:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <ktime_ms_delta>
2014-12-17 5:11 ` Chunyan Zhang [this message]
2014-12-18 7:53 ` [PATCH] ktime.h: Introduce ktime_ms_delta Arnd Bergmann
2015-01-23 10:48 ` [tip:timers/core] " tip-bot for Chunyan Zhang
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