Commit 58bff947 authored Feb 17, 2011 by Jan Beulich Committed by Ingo Molnar Feb 18, 2011

x86: Eliminate pointless adjustment attempts in fixup_irqs()

Not only when an IRQ's affinity equals cpu_online_mask is there
no need to actually try to adjust the affinity, but also when
it's a subset thereof. This particularly avoids adjustment
attempts during system shutdown to any IRQs bound to CPU#0.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Gary Hade <garyhade@us.ibm.com>
LKML-Reference: <4D5D52C2020000780003272C@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 2a324ce7

arch/x86/kernel/irq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -310,7 +310,7 @@ void fixup_irqs(void)
		data = &desc->irq_data;
		affinity = data->affinity;
		if (!irq_has_action(irq) \|\|
		cpumask_equal(affinity, cpu_online_mask)) {
		cpumask_subset(affinity, cpu_online_mask)) {
		raw_spin_unlock(&desc->lock);
		continue;
		}

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