]> git.karo-electronics.de Git - karo-tx-linux.git/commit
timekeeping: Maintain ktime_t based offsets for hrtimers
authorThomas Gleixner <tglx@linutronix.de>
Tue, 17 Jul 2012 17:33:54 +0000 (13:33 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 19 Jul 2012 15:58:46 +0000 (08:58 -0700)
commit03a90b9a6f7eec70edde4eb1f88fa8a5c058d85e
tree16207bc8fca8b26b607bbb04c521bfb0c9ab635e
parentd21e4baf4523fec26e3c70cb78b013ad3b245c83
timekeeping: Maintain ktime_t based offsets for hrtimers

This is a backport of 5b9fe759a678e05be4937ddf03d50e950207c1c0

We need to update the hrtimer clock offsets from the hrtimer interrupt
context. To avoid conversions from timespec to ktime_t maintain a
ktime_t based representation of those offsets in the timekeeper. This
puts the conversion overhead into the code which updates the
underlying offsets and provides fast accessible values in the hrtimer
interrupt.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Prarit Bhargava <prarit@redhat.com>
Link: http://lkml.kernel.org/r/1341960205-56738-4-git-send-email-johnstul@us.ibm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/time/timekeeping.c