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authorJohn Stultz <john.stultz@linaro.org>2011-02-15 21:45:16 +0300
committerJohn Stultz <john.stultz@linaro.org>2011-02-21 23:53:08 +0300
commit70a08cca1227dc31c784ec930099a4417a06e7d0 (patch)
treed813ae86435a3104b66d18ee746d0f3ecc73a14a /include/linux/time.h
parent314ac37150011ebb398f522db528d2dbcc611189 (diff)
downloadlinux-70a08cca1227dc31c784ec930099a4417a06e7d0.tar.xz
timers: Add CLOCK_BOOTTIME hrtimer base
CLOCK_MONOTONIC stops while the system is in suspend. This is because to applications system suspend is invisible. However, there is a growing set of applications that are wanting to be suspend-aware, but do not want to deal with the complications of CLOCK_REALTIME (which might jump around if settimeofday is called). For these applications, I propose a new clockid: CLOCK_BOOTTIME. CLOCK_BOOTTIME is idential to CLOCK_MONOTONIC, except it also includes any time spent in suspend. This patch add hrtimer base for CLOCK_BOOTTIME, using get_monotonic_boottime/ktime_get_boottime, to allow in kernel users to set timers against. CC: Jamie Lokier <jamie@shareable.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Alexander Shishkin <virtuoso@slind.org> CC: Arve Hjønnevåg <arve@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'include/linux/time.h')
-rw-r--r--include/linux/time.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/time.h b/include/linux/time.h
index 02d48fb30b41..454a26205787 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -293,6 +293,7 @@ struct itimerval {
#define CLOCK_MONOTONIC_RAW 4
#define CLOCK_REALTIME_COARSE 5
#define CLOCK_MONOTONIC_COARSE 6
+#define CLOCK_BOOTTIME 7
/*
* The IDs of various hardware clocks: