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authorChunyan Zhang <zhang.chunyan@linaro.org>2014-12-17 13:11:35 +0800
committerThomas Gleixner <tglx@linutronix.de>2015-01-23 11:47:15 +0100
commit41fbf3b39d5eca01527338b4d0ee15ee1ae1023c (patch)
treefadcc3cc42eda258a31ec7d880f259d79f21063a
parentec6f34e5b552fb0a52e6aae1a5afbbb1605cc6cc (diff)
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>
-rw-r--r--include/linux/ktime.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index c9d645ad98ff..891ea92a68b0 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);