Revert "xen/smp: Fix CPU online/offline bug triggering a BUG: scheduling while atomic."
This reverts commit 41bd956de3
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The fix is incorrect and not appropiate for the latest kernels.
In fact it _causes_ the BUG: scheduling while atomic while
doing vCPU hotplug.
Suggested-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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@ -432,13 +432,6 @@ static void __cpuinit xen_play_dead(void) /* used only with HOTPLUG_CPU */
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play_dead_common();
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HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
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cpu_bringup();
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/*
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* Balance out the preempt calls - as we are running in cpu_idle
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* loop which has been called at bootup from cpu_bringup_and_idle.
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* The cpucpu_bringup_and_idle called cpu_bringup which made a
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* preempt_disable() So this preempt_enable will balance it out.
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*/
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preempt_enable();
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}
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#else /* !CONFIG_HOTPLUG_CPU */
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