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x86, tsc: Fix a preemption leak in restore_sched_clock_state() 

Doh, a real life genuine preemption leak..

This caused a suspend failure.

Reported-bisected-and-tested-by-the-invaluable: Jeff Chua <jeff.chua.linux@gmail.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Nico Schottelius <nico-linux-20100709@schottelius.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Florian Pritz <flo@xssn.at>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: <stable@kernel.org> # Greg, please apply after: cd7240c ("x86, tsc, sched: Recompute cyc2ns_offset's during resume from")
sleep states
LKML-Reference: <1284150773.402.122.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-09-10 22:32:53 +02:00 committed by Ingo Molnar
parent da2b71edd8
commit 55496c896b
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/tsc.c
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@ -655,7 +655,7 @@ void restore_sched_clock_state(void)
local_irq_save(flags);
get_cpu_var(cyc2ns_offset) = 0;
__get_cpu_var(cyc2ns_offset) = 0;
offset = cyc2ns_suspend - sched_clock();
for_each_possible_cpu(cpu)