tree 74b02ba1f13aaf8292bd472a8a197ac900ff20e7
parent 2ba2a3054fdffc8e6452f4ee120760322a6fbd43
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1250257650 +0200
committer Thomas Gleixner <tglx@linutronix.de> 1250326546 +0200

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>