Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757914AbYKEUAP (ORCPT ); Wed, 5 Nov 2008 15:00:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757069AbYKET6K (ORCPT ); Wed, 5 Nov 2008 14:58:10 -0500 Received: from mx2.redhat.com ([66.187.237.31]:41413 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756088AbYKET6E (ORCPT ); Wed, 5 Nov 2008 14:58:04 -0500 From: Eduardo Habkost To: Avi Kivity , Ingo Molnar Cc: "Eric W. Biederman" , Simon Horman , Andrew Morton , Vivek Goyal , Haren Myneni , Andrey Borzenkov , mingo@redhat.com, "Rafael J. Wysocki" , kexec@lists.infradead.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Eduardo Habkost Subject: [PATCH 07/15] x86: Make nmi_shootdown_cpus() available on !SMP and !X86_LOCAL_APIC Date: Wed, 5 Nov 2008 17:56:50 -0200 Message-Id: <1225915018-6548-8-git-send-email-ehabkost@redhat.com> In-Reply-To: <1225915018-6548-1-git-send-email-ehabkost@redhat.com> References: <1225915018-6548-1-git-send-email-ehabkost@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1596 Lines: 52 The X86_LOCAL_APIC #ifdef was for kdump. For !SMP, the function simply does nothing. Signed-off-by: Eduardo Habkost --- arch/x86/kernel/reboot.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index be29987..23a9d78 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -522,7 +522,7 @@ void machine_crash_shutdown(struct pt_regs *regs) #endif -#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC) +#if defined(CONFIG_SMP) /* This keeps a track of which one is crashing cpu. */ static int crashing_cpu; @@ -568,6 +568,12 @@ static struct notifier_block crash_nmi_nb = { .notifier_call = crash_nmi_callback, }; +/* Halt all other CPUs, calling the specified function on each of them + * + * This function can be used to halt all other CPUs on crash + * or emergency reboot time. The function passed as parameter + * will be called inside a NMI handler on all CPUs. + */ void nmi_shootdown_cpus(nmi_shootdown_cb callback) { unsigned long msecs; @@ -596,4 +602,9 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback) /* Leave the nmi callback set */ } +#else /* !CONFIG_SMP */ +void nmi_shootdown_cpus(nmi_shootdown_cb callback) +{ + /* No other CPUs to shoot down */ +} #endif -- 1.5.5.GIT -- 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/