Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932221Ab1BQPxi (ORCPT ); Thu, 17 Feb 2011 10:53:38 -0500 Received: from vpn.id2.novell.com ([195.33.99.129]:57812 "EHLO vpn.id2.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932205Ab1BQPxh convert rfc822-to-8bit (ORCPT ); Thu, 17 Feb 2011 10:53:37 -0500 Message-Id: <4D5D52C2020000780003272C@vpn.id2.novell.com> X-Mailer: Novell GroupWise Internet Agent 8.0.1 Date: Thu, 17 Feb 2011 15:54:26 +0000 From: "Jan Beulich" To: , , Cc: Subject: [PATCH, resend #2] x86: eliminate pointless adjustment attempts in fixup_irqs() Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1011 Lines: 30 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 --- arch/x86/kernel/irq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 2.6.38-rc5/arch/x86/kernel/irq.c +++ 2.6.38-rc5-x86-reduce-fixup-irqs/arch/x86/kernel/irq.c @@ -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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/