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s390/time: return with irqs disabled from psw_idle

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Modify the psw_idle waiting logic in entry[64].S to return with
interrupts disabled. This avoids potential issues with udelay
and interrupt loops as interrupts are not reenabled after
clock comparator interrupts.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2013-08-23 14:45:58 +02:00
commit 0587d409ec
5 changed files with 4 additions and 6 deletions
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arch/s390/kernel/process.c
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@ -71,6 +71,7 @@ void arch_cpu_idle(void)
}
/* Halt the cpu and keep track of cpu time accounting. */
vtime_stop_cpu();
local_irq_enable();
}
void arch_cpu_idle_exit(void)