From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57722501F2C for ; Mon, 19 Oct 2026 13:10:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792415443; cv=none; b=FOP0274k9YNKQr6/DdtUc+rnUk1qELvONF6xCtrDiwNoC6w8ucszgV+CMvQZb4BOfBauoLMSI9xkGzlOR4OtcdclzdglyccO1oE/mrktZChRjefMMC+9IqSmuMgTH9NQoo8UFfCaJLWpre/8epFtja4jp3kcQ1qsSl46FttmJDA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792415443; c=relaxed/simple; bh=wlxy2j05KCotJozRwRouPM2Igi9mXCXuwiQ8vGfzCT8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T5KOWr5pk09T20NyKacB75u19BqM/Yqa+n0/GAoPzWCmd3KBAlNrbJwef6YWjLlqdUrqXgEw32gNwFeNzAw1+bqjBEFa8AMq59ZyaUbT+dfI+36yIONttp2jewjwpnHUEQHyPXmKrm7UpcbcHwMgUDAwGHLTvpZzwKHSsrDmQb8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ApXkVETF; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ApXkVETF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 093691F000C4; Mon, 19 Oct 2026 13:10:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792415440; bh=O/cND9DK761g7Od/EFbbufGMF0NPniq3RLhpe77Yjxw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ApXkVETFl7JaWshAVImeu+NLrNbgbpjtVP0iuKOro5OWf8eUjHSwThMzxOumKHkPE frdDeAzPLG1OVIn8ZTvm5nAl/XjetpnOOP3n4eRstEAUSvRSJQb+enQoTCfcQAndEQ McWbFpxebAIjw7Myy5Gex8ZMwltmtEFjW118FwEXf5HDcdOBtyElCKwDBQERl119FM I6kDVJEw/zGQrZOIQPn2YVZNDvVqYwVll4letJexbBMFL9ZO6XMCmx6DS+sA7j+F5P kUJHECJYHRA1Mhz2GXou3jMpRbAMRIA88wzA+/MWU9xaiWHeMn5PZGHxBSQtLXUaiy Y2G/lpbYWzWKg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Daniel Lezcano , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long Subject: [RFC PATCH 34/49] clocksource/drivers/rtl-otto: Move CPUHP_AP_REALTEK_TIMER_STARTING post stop_machine() Date: Mon, 19 Oct 2026 15:08:41 +0200 Message-ID: <20261019130856.49711-35-frederic@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261019130856.49711-1-frederic@kernel.org> References: <20261019130856.49711-1-frederic@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Between CPUHP_TEARDOWN_CPU and CPUHP_AP_OFFLINE, stop_machine executes all the teardown callbacks while stopping all CPUs in the system. This doesn't mix-up well with running RT or isolated tasks. In order to transition smoothly from global stop_machine to finer grained synchronization between teardown callbacks and the other CPUs, a new stop machine post function has been introduced to be executed after the main one with IRQs still disabled while other CPUs can exit stop_machine(). The state here has no teardown callback. Move it to post stop_machine() accordingly. Signed-off-by: Frederic Weisbecker --- kernel/cpu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/cpu.c b/kernel/cpu.c index 75f4cae8971e..374e7599baae 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1275,7 +1275,7 @@ void clear_tasks_mm_cpumask(int cpu) static int take_cpu_down(void *_param) { struct cpuhp_cpu_state *st = this_cpu_ptr(&cpuhp_state); - enum cpuhp_state target = max((int)st->target, CPUHP_AP_ARC_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_REALTEK_TIMER_STARTING); int err, cpu = smp_processor_id(); /* Ensure this CPU doesn't handle any more interrupts. */ @@ -1303,7 +1303,7 @@ static int take_cpu_down_post(void *_param) enum cpuhp_state target = max((int)st->target, CPUHP_AP_OFFLINE); int cpu = smp_processor_id(); - WARN_ON(st->state != CPUHP_AP_ARC_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_REALTEK_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0