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tick: Use zalloc_cpumask_var for allocating offstack cpumasks

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commit b352bc1cbc (tick: Convert broadcast cpu bitmaps to
cpumask_var_t) broke CONFIG_CPUMASK_OFFSTACK in a very subtle way.

Instead of allocating the cpumasks with zalloc_cpumask_var it uses
alloc_cpumask_var, so we can get random data there, which of course
confuses the logic completely and causes random failures.

Reported-and-tested-by: Dave Jones <davej@redhat.com>
Reported-and-tested-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1305032015060.2990@ionos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner 2013-05-03 20:22:36 +02:00 committed by Ingo Molnar
parent ce857229e0
commit fbd44a607a
1 changed files with 5 additions and 5 deletions
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10
kernel/time/tick-broadcast.c
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@ -785,11 +785,11 @@ bool tick_broadcast_oneshot_available(void)
void __init tick_broadcast_init(void)
{
alloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
alloc_cpumask_var(&tmpmask, GFP_NOWAIT);
zalloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
zalloc_cpumask_var(&tmpmask, GFP_NOWAIT);
#ifdef CONFIG_TICK_ONESHOT
alloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
alloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
alloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
zalloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
zalloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
zalloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
#endif
}