From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758228AbYGOVOq (ORCPT ); Tue, 15 Jul 2008 17:14:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755254AbYGOVOb (ORCPT ); Tue, 15 Jul 2008 17:14:31 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:38239 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755091AbYGOVOa (ORCPT ); Tue, 15 Jul 2008 17:14:30 -0400 Message-Id: <20080715211429.769867000@polaris-admin.engr.sgi.com> References: <20080715211429.454823000@polaris-admin.engr.sgi.com> User-Agent: quilt/0.46-1 Date: Tue, 15 Jul 2008 14:14:31 -0700 From: Mike Travis To: Rusty Russell , Ingo Molnar , Andrew Morton Cc: "H. Peter Anvin" , Christoph Lameter , Jack Steiner , linux-kernel@vger.kernel.org, "Eric W. Biederman" Subject: [PATCH 2/8] cpumask: Optimize cpumask_of_cpu in arch/x86/kernel/io_apic_64.c Content-Disposition: inline; filename=optimize-cpu_mask_of_cpu-in-arch_x86_kernel_io_apic_64_c Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * 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 Date: Tue Jul 15 14:55:17 2008 +0200 Signed-off-by: Mike Travis Cc: Eric W. Biederman --- 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; --