From: Mike Travis <travis@sgi.com>
Date: Tue, 15 Jul 2008 21:14:31 +0000 (-0700)
Subject: cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/io_apic_64.c
X-Git-Tag: v2.6.27-rc1~848^2~16
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb6d2be60dc3ec9ac788f45d8e24b82a9faacdd9;p=linux-2.6

cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/io_apic_64.c

  * Optimize various places where a pointer to the cpumask_of_cpu value
    will result in reducing stack pressure.

Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index bf27114773..a85db79075 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -1372,12 +1372,10 @@ static unsigned int startup_ioapic_irq(unsigned int irq)
 static int ioapic_retrigger_irq(unsigned int irq)
 {
 	struct irq_cfg *cfg = &irq_cfg[irq];
-	cpumask_t mask;
 	unsigned long flags;
 
 	spin_lock_irqsave(&vector_lock, flags);
-	mask = cpumask_of_cpu(first_cpu(cfg->domain));
-	send_IPI_mask(mask, cfg->vector);
+	send_IPI_mask(cpumask_of_cpu(first_cpu(cfg->domain)), cfg->vector);
 	spin_unlock_irqrestore(&vector_lock, flags);
 
 	return 1;