From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933017AbcBIUMh (ORCPT ); Tue, 9 Feb 2016 15:12:37 -0500 Received: from www.linutronix.de ([62.245.132.108]:44088 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932691AbcBIUMe (ORCPT ); Tue, 9 Feb 2016 15:12:34 -0500 Message-Id: <20160209201007.682184765@linutronix.de> User-Agent: quilt/0.63-1 Date: Tue, 09 Feb 2016 20:11:20 -0000 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Jiri Olsa , Stephane Eranian , Vince Weaver Subject: [patch 1/4] perf: Remove bogus UP_CANCELED hotplug state References: <20160209200747.893426063@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=perf--Remove-bogus-UP_CANCELED-hotplug-state.patch X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001,URIBL_BLOCKED=0.001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If CPU_UP_PREPARE fails the perf hotplug code calls perf_event_exit_cpu(), which is a pointless exercise. The cpu is not online, so the smp function calls return -ENXIO. So the result is a list walk to call noops. Remove it. Signed-off-by: Thomas Gleixner --- kernel/events/core.c | 1 - 1 file changed, 1 deletion(-) --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9286,7 +9286,6 @@ perf_cpu_notify(struct notifier_block *s perf_event_init_cpu(cpu); break; - case CPU_UP_CANCELED: case CPU_DOWN_PREPARE: perf_event_exit_cpu(cpu); break;