Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755452Ab0GEKcT (ORCPT ); Mon, 5 Jul 2010 06:32:19 -0400 Received: from vpn.id2.novell.com ([195.33.99.129]:49524 "EHLO vpn.id2.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755305Ab0GEKcP convert rfc822-to-8bit (ORCPT ); Mon, 5 Jul 2010 06:32:15 -0400 Message-Id: <4C31D0C70200007800009863@vpn.id2.novell.com> X-Mailer: Novell GroupWise Internet Agent 8.0.1 Date: Mon, 05 Jul 2010 11:32:07 +0100 From: "Jan Beulich" To: , , Cc: Subject: [PATCH] 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: 1063 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(-) --- linux-2.6.35-rc4/arch/x86/kernel/irq.c 2010-02-24 19:52:17.000000000 +0100 +++ 2.6.35-rc4-x86-reduce-irq-fixup/arch/x86/kernel/irq.c 2010-07-05 10:20:16.000000000 +0200 @@ -298,7 +298,7 @@ void fixup_irqs(void) affinity = desc->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/