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 2AC764F96AD for ; Mon, 19 Oct 2026 13:10:51 +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=1792415452; cv=none; b=eQPhpMC69ZwLUIsDtsElCb/IEf15ZdJ5IfFJQv85eO+SROn6V91ZOPlt+h/PH/wZDrAklNj5JqhlnQ3YzlECQyrBxSAUm37dWlfC0Aup5oJbee5t0AxUebE0IlFGgvxKUtVPqR55SmgR2pNubXS3343Z6p71OOdsU0o27jlZ4s4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792415452; c=relaxed/simple; bh=OYGIRsiBHjIubpgZ8VpTEio5MlHSdHaL0B9R9j6iIA4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HsmJZL9BFvKjBAsdSycGCu7PAPxaSeoNei4sw/6BzpslsK/R1noRfHuCWuBmVexBqEE2oxVqGOzAAn1sYu26bXfI3km5wRzfuNIhTe3mHgIYVxMYRzUqFUXv6ssvRESoFi8BoOFNpjGcJMEqg59DkkkidCw94WEbsQhw9HEg6Jo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=m0hXcuH/; 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="m0hXcuH/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2227D1F000C4; Mon, 19 Oct 2026 13:10:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792415450; bh=IKOpEZ8w5AskyWGbA+4l5TeFJW9axDk9orZvSRY+hzI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=m0hXcuH/YJSiTeaFQL1Eyj83kZlUct24UNxZR4hCseKt8FHV4iC1taAa4NydvOsF+ kGXnV+q0LfpJ65HPAeRKTShpAMUfAH9+8xTpQ2crnBQ2qEC75eIt3k/wzdzfJhMNrA wyGYsBis6nUN6q3S0oGAuWEmOxteV3GjKXjpHKOPEG/eZXtGTsg1sIQ4xDXgcKnfyS t+rrsspGZkZUIlnkcOujsD/kmotI0MqVxAshysuYHKyd34XbeYRnRcihOk9h2Y1F8i 8DSg2LPXk91uHa/9VO26jRP57Kw3l6v8LZDRYT/qLrg1hTdzq/vkY/SmUPEYBDylR0 PBjY3yaX5IOQQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Daniel Lezcano , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long Subject: [RFC PATCH 38/49] clocksource/drivers/timer-ti-dm: Move CPUHP_AP_TI_GP_TIMER_STARTING post stop_machine() Date: Mon, 19 Oct 2026 15:08:45 +0200 Message-ID: <20261019130856.49711-39-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(). This state doesn't have a 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 f8c8fbbd0628..c2356a36d345 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_CSKY_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_TI_GP_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_CSKY_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_TI_GP_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0