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[S390] smp/idle: call init_idle() before starting a new cpu

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Call init_idle() which (re-)initializes the idle task structure before
it gets used on a new cpu.
That way we can also get rid of the odd preempt_enable_no_resched()
call we have in the cpu offline path within cpu_idle(). That call
prevented preempt count imbalances between cpu hotplug operations.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2011-01-05 12:48:09 +01:00
committed by Martin Schwidefsky
parent f230886b0b
commit da7f51c11d
3 changed files with 5 additions and 7 deletions
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arch/s390/kernel/smp.c
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@@ -575,6 +575,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
idle = c_idle.idle;
current_set[cpu] = c_idle.idle;
}
init_idle(idle, cpu);
if (smp_alloc_lowcore(cpu))
return -ENOMEM;
do {