diff options
| author | John Stultz <john.stultz@linaro.org> | 2011-02-15 10:45:16 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2011-02-21 12:53:08 -0800 |
| commit | 70a08cca1227dc31c784ec930099a4417a06e7d0 (patch) | |
| tree | d813ae86435a3104b66d18ee746d0f3ecc73a14a /include/linux | |
| parent | 314ac37150011ebb398f522db528d2dbcc611189 (diff) | |
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')
| -rw-r--r-- | include/linux/hrtimer.h | 1 | ||||
| -rw-r--r-- | include/linux/time.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 7a9e7ee0f35c..6bc1804bfbfa 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -151,6 +151,7 @@ struct hrtimer_clock_base { enum hrtimer_base_type { HRTIMER_BASE_REALTIME, HRTIMER_BASE_MONOTONIC, + HRTIMER_BASE_BOOTTIME, HRTIMER_MAX_CLOCK_BASES, }; 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: |