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>

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: