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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2011-08-23 17:29:42 +0400
committerThomas Gleixner <tglx@linutronix.de>2011-09-08 13:10:56 +0400
commitd1748302f70be7469809809283fe164156a34231 (patch)
treec81137f4126f2fe1451c28441415c1cd0fa0f7cd /include/linux/clockchips.h
parent29c158e81c733ac7d6a75c5ee929f34fb9f92983 (diff)
downloadlinux-d1748302f70be7469809809283fe164156a34231.tar.xz
clockevents: Make minimum delay adjustments configurable
The automatic increase of the min_delta_ns of a clockevents device should be done in the clockevents code as the minimum delay is an attribute of the clockevents device. In addition not all architectures want the automatic adjustment, on a massively virtualized system it can happen that the programming of a clock event fails several times in a row because the virtual cpu has been rescheduled quickly enough. In that case the minimum delay will erroneously be increased with no way back. The new config symbol GENERIC_CLOCKEVENTS_MIN_ADJUST is used to enable the automatic adjustment. The config option is selected only for x86. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: john stultz <johnstul@us.ibm.com> Link: http://lkml.kernel.org/r/20110823133142.494157493@de.ibm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/clockchips.h')
-rw-r--r--include/linux/clockchips.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index d6733e27af34..39bb050bdbb2 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -140,7 +140,7 @@ extern void clockevents_set_mode(struct clock_event_device *dev,
enum clock_event_mode mode);
extern int clockevents_register_notifier(struct notifier_block *nb);
extern int clockevents_program_event(struct clock_event_device *dev,
- ktime_t expires, ktime_t now);
+ ktime_t expires, bool force);
extern void clockevents_handle_noop(struct clock_event_device *dev);