From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752880AbbGWNBX (ORCPT ); Thu, 23 Jul 2015 09:01:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51731 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752549AbbGWNBJ (ORCPT ); Thu, 23 Jul 2015 09:01:09 -0400 From: Vitaly Kuznetsov To: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" , linux-kernel@vger.kernel.org, Dexuan Cui , Ingo Molnar , "Paul E. McKenney" , "Rafael J. Wysocki" , Peter Zijlstra , Thomas Gleixner , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , gregkh@linuxfoundation.org Subject: [PATCH v7 2/3] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable Date: Thu, 23 Jul 2015 15:00:56 +0200 Message-Id: <1437656457-4346-3-git-send-email-vkuznets@redhat.com> In-Reply-To: <1437656457-4346-1-git-send-email-vkuznets@redhat.com> References: <1437656457-4346-1-git-send-email-vkuznets@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- Changes since v6: - fix a typo in description [Thomas Gleixner] --- kernel/cpu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index 0fca2ba..718ea76 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? */ -- 2.4.3