[PATCH 2/8] cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/io_apic_64.c

[Mike Travis]

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

Based on linux-2.6.tip/master at the following commit:

    commit 0a91813e16ebd5c2d9b5c2acd5b7c91742112c4f
    Merge: 9a635fa... 724dce0...
    Author: Ingo Molnar <mingo@xxxxxxx>
    Date:   Tue Jul 15 14:55:17 2008 +0200


Signed-off-by: Mike Travis <travis@xxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
---
 arch/x86/kernel/io_apic_64.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- linux-2.6.tip.orig/arch/x86/kernel/io_apic_64.c
+++ linux-2.6.tip/arch/x86/kernel/io_apic_64.c
@@ -1372,12 +1372,10 @@ static unsigned int startup_ioapic_irq(u
 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;

-- 
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