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s390/nohz: use a per-cpu flag for arch_needs_cpu

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Move the nohz_delay bit from the s390_idle data structure to the
per-cpu flags. Clear the nohz delay flag in __cpu_disable and
remove the cpu hotplug notifier that used to do this.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2014-09-30 17:37:52 +02:00
parent a9b1649917
commit fe0f49768d
9 changed files with 11 additions and 31 deletions
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arch/s390/kernel/irq.c
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@@ -259,7 +259,7 @@ static irqreturn_t do_ext_interrupt(int irq, void *dummy)
ext_code = *(struct ext_code *) &regs->int_code;
if (ext_code.code != EXT_IRQ_CLK_COMP)
__get_cpu_var(s390_idle).nohz_delay = 1;
set_cpu_flag(CIF_NOHZ_DELAY);
index = ext_hash(ext_code.code);
rcu_read_lock();