From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753930AbbGWP2m (ORCPT ); Thu, 23 Jul 2015 11:28:42 -0400 Received: from p3plsmtps2ded04.prod.phx3.secureserver.net ([208.109.80.198]:60895 "EHLO p3plsmtps2ded04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753804AbbGWP2A (ORCPT ); Thu, 23 Jul 2015 11:28:00 -0400 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, tglx@linutronix.de Cc: "K. Y. Srinivasan" Subject: [PATCH V7 2/4] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable Date: Thu, 23 Jul 2015 09:52:26 -0700 Message-Id: <1437670348-30307-2-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1437670348-30307-1-git-send-email-kys@microsoft.com> References: <1437670316-30267-1-git-send-email-kys@microsoft.com> <1437670348-30307-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vitaly Kuznetsov Hyper-V module needs to disable cpu hotplug (offlining) as there is no support from hypervisor side to reassign already opened event channels to a different CPU. Currently it is been done by altering smp_ops.cpu_disable but it is hackish. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Thomas Gleixner Signed-off-by: K. Y. Srinivasan --- kernel/cpu.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index 1225fc2..18f00ae 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -194,6 +194,7 @@ void cpu_hotplug_disable(void) cpu_hotplug_disabled++; cpu_maps_update_done(); } +EXPORT_SYMBOL_GPL(cpu_hotplug_disable); void cpu_hotplug_enable(void) { @@ -201,7 +202,7 @@ void cpu_hotplug_enable(void) WARN_ON(--cpu_hotplug_disabled < 0); cpu_maps_update_done(); } - +EXPORT_SYMBOL_GPL(cpu_hotplug_enable); #endif /* CONFIG_HOTPLUG_CPU */ /* Need to know about CPUs going up/down? */ -- 1.7.4.1