From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eduardo Habkost Subject: [PATCH 08/15] x86: Disable IRQs before doing anything on nmi_shootdown_cpus() Date: Wed, 5 Nov 2008 17:56:51 -0200 Message-ID: <1225915018-6548-9-git-send-email-ehabkost@redhat.com> References: <1225915018-6548-1-git-send-email-ehabkost@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrew Morton , Eduardo Habkost , kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Rafael J. Wysocki" , Haren Myneni , Simon Horman , "Eric W. Biederman" , Andrey Borzenkov , mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, Vivek Goyal To: Avi Kivity , Ingo Molnar Return-path: In-Reply-To: <1225915018-6548-1-git-send-email-ehabkost-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kexec-bounces-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Errors-To: kexec-bounces+glkk-kexec=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: kvm.vger.kernel.org We need to know on which CPU we are running on, and we don't want to be preempted while doing this. Signed-off-by: Eduardo Habkost --- arch/x86/kernel/reboot.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 23a9d78..407106e 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -577,6 +577,7 @@ static struct notifier_block crash_nmi_nb = { void nmi_shootdown_cpus(nmi_shootdown_cb callback) { unsigned long msecs; + local_irq_disable(); /* Make a note of crashing cpu. Will be used in NMI callback.*/ crashing_cpu = safe_smp_processor_id(); -- 1.5.5.GIT