Messages in this thread Patch in this message | | | Date | Tue, 15 Jul 2008 14:14:31 -0700 | From | Mike Travis <> | Subject | [PATCH 2/8] cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/io_apic_64.c |
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* 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@elte.hu> Date: Tue Jul 15 14:55:17 2008 +0200
Signed-off-by: Mike Travis <travis@sgi.com> Cc: Eric W. Biederman <ebiederm@xmission.com> --- 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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