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[1/3] ktime.h: Introduce ktime_ms_delta

Message ID 1418903522-19137-2-git-send-email-zhang.chunyan@linaro.org
State Accepted
Commit 41fbf3b39d5eca01527338b4d0ee15ee1ae1023c
Headers show

Commit Message

Chunyan Zhang Dec. 18, 2014, 11:52 a.m. UTC 
This patch introduces 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>
---
 include/linux/ktime.h |    5 +++++
 1 file changed, 5 insertions(+)
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Patch

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);