From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Fri, 14 Aug 2009 13:47:30 +0000 (+0200)
Subject: timekeeping: Update clocksource with stop_machine
X-Git-Tag: v2.6.32-rc1~168^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=75c5158f70c065b9704b924503d96e8297838f79;p=pandora-kernel.git

timekeeping: Update clocksource with stop_machine

update_wall_time calls change_clocksource HZ times per second to check
if a new clock source is available. In close to 100% of all calls
there is no new clock. Replace the tick based check by an update done
with stop_machine.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Daniel Walker <dwalker@fifo99.com>
LKML-Reference: <20090814134810.711836357@de.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

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