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| author | Thomas Gleixner <tglx@linutronix.de> | 2012-07-17 13:33:56 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-19 08:58:46 -0700 |
| commit | 22f4bbcfb131e2392c78ad67af35fdd436d4dd54 (patch) | |
| tree | fda47805e997a513b7f3c9d86d1e974c5726ca15 /include/linux/irq_cpustat.h | |
| parent | 6c89f2ce05ea7e26a7580ad9eb950f2c4f10891b (diff) | |
| download | kernel_samsung_tuna-22f4bbcfb131e2392c78ad67af35fdd436d4dd54.zip kernel_samsung_tuna-22f4bbcfb131e2392c78ad67af35fdd436d4dd54.tar.gz kernel_samsung_tuna-22f4bbcfb131e2392c78ad67af35fdd436d4dd54.tar.bz2 | |
timekeeping: Provide hrtimer update function
This is a backport of f6c06abfb3972ad4914cef57d8348fcb2932bc3b
To finally fix the infamous leap second issue and other race windows
caused by functions which change the offsets between the various time
bases (CLOCK_MONOTONIC, CLOCK_REALTIME and CLOCK_BOOTTIME) we need a
function which atomically gets the current monotonic time and updates
the offsets of CLOCK_REALTIME and CLOCK_BOOTTIME with minimalistic
overhead. The previous patch which provides ktime_t offsets allows us
to make this function almost as cheap as ktime_get() which is going to
be replaced in hrtimer_interrupt().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Link: http://lkml.kernel.org/r/1341960205-56738-7-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>
Diffstat (limited to 'include/linux/irq_cpustat.h')
0 files changed, 0 insertions, 0 deletions