clocksource: Resolve cpu hotplug dead lock with TSC unstable, fix crash

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The watchdog timer is started after the watchdog clocksource
and at least one watched clocksource have been registered. The
clocksource work element watchdog_work is initialized just
before the clocksource timer is started. This is too late for
the clocksource_mark_unstable call from native_cpu_up. To fix
this use a static initializer for watchdog_work.

This resolves a boot crash reported by multiple people.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20090911153305.3fe9a361@skybase>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Martin Schwidefsky 2009-09-11 15:33:05 +02:00 • committed by Ingo Molnar

parent e500011ffa

commit f79e0258ea

1 changed files with 3 additions and 2 deletions

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kernel/time/clocksource.c

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