From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030776AbcGKMpM (ORCPT ); Mon, 11 Jul 2016 08:45:12 -0400 Received: from www.linutronix.de ([62.245.132.108]:57117 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933897AbcGKMat (ORCPT ); Mon, 11 Jul 2016 08:30:49 -0400 Message-Id: <20160711122532.298565041@linutronix.de> User-Agent: quilt/0.63-1 Date: Mon, 11 Jul 2016 12:28:37 -0000 From: Anna-Maria Gleixner To: LKML Cc: Peter Zijlstra , Ingo Molnar , linux-sh@vger.kernel.org, Sebastian Andrzej Siewior , Anna-Maria Gleixner Subject: [patch 20/66] sh: perf: Convert the hotplug notifiers to state machine callbacks References: <20160711122450.923603742@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Disposition: inline; filename=0020-sh-perf-Convert-the-hotplug-notifiers-to-state-machi.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 From: Thomas Gleixner Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Thomas Gleixner Cc: linux-sh@vger.kernel.org Reviewed-by: Sebastian Andrzej Siewior Signed-off-by: Anna-Maria Gleixner --- arch/sh/kernel/perf_event.c | 23 ++++------------------- include/linux/cpuhotplug.h | 1 + 2 files changed, 5 insertions(+), 19 deletions(-) --- a/arch/sh/kernel/perf_event.c +++ b/arch/sh/kernel/perf_event.c @@ -352,28 +352,12 @@ static struct pmu pmu = { .read = sh_pmu_read, }; -static void sh_pmu_setup(int cpu) +static int sh_pmu_prepare_cpu(unsigned int cpu) { struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu); memset(cpuhw, 0, sizeof(struct cpu_hw_events)); -} - -static int -sh_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) -{ - unsigned int cpu = (long)hcpu; - - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_UP_PREPARE: - sh_pmu_setup(cpu); - break; - - default: - break; - } - - return NOTIFY_OK; + return 0; } int register_sh_pmu(struct sh_pmu *_pmu) @@ -394,6 +378,7 @@ int register_sh_pmu(struct sh_pmu *_pmu) WARN_ON(_pmu->num_events > MAX_HWEVENTS); perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW); - perf_cpu_notifier(sh_pmu_notifier); + cpuhp_setup_state(CPUHP_PERF_SUPERH, "PERF_SUPERH", sh_pmu_prepare_cpu, + NULL); return 0; } --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -11,6 +11,7 @@ enum cpuhp_state { CPUHP_PERF_X86_RAPL_PREP, CPUHP_PERF_BFIN, CPUHP_PERF_POWER, + CPUHP_PERF_SUPERH, CPUHP_NOTIFY_PREPARE, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD,