From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793896360; b=owJEhFApRAXPp6+eXv/AkkJ5Ouihy8pVABko5I7WOkQ5uHv2Ua+wavQhMbVTlzDKcINy R2wypqwvp4ELnsd1rWCINk4HdUkxbiCIisjqWQ7r6YS0lZKot5ees5RT+QEpa98l30hjS vHhTKzED0ix6CZ5VygeeUikPJ1M4oVngavggDE1wxYmZStlR4BFE1D8x250YDERoGmap9 xIRLb8bnkt+tNUjBKiOQx7AjKqdRV1yJ8T4j3o4jYjwXHwcLRTFA9BLL3GJIbv7l9wfgb AMy/pqeEwvx+1nSDfUL9y6qTEZ1+u/wKtKaYbLGlvS9sEuozC2ugMMqun+myVk0bA6w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896360; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=vczxqCkOZFjD/nFEaTMrrUxCppRkHMvooX6kBAKOW2Y=; b=Lc/sDkOJqKPP2dAs4H3M0eHSuxk+v8p6WRX19O8WnEwn0hCB6K/QIOHZwyOjSMo8biqo xHePvJO2Odjx0pI9BW+PVHQrHEHTy+ZiY56UemzdYSTT9OR95eHo8olhnpfYMbN+a1fr6 SvN7HloewA+UnneRY6cE8ZVCPPL8MaAyKJoVGW9W1P5GZPXVh34rNR6EPtfK72QbsxD+v HC2LXtkWh51cbhJ4CSXEEfw9IttZr94ng0ASss1GpPAt6McoRaRu4i6EYpF5UY1cR6TdI ydQJhuLcz052PhMT8JgEza4pxhvt1yAcrqS7wYAF74ukQIOTWQa8cgK+LHzIujWp5jA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="lisH/Ud3"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF5A86083615 for ; Thu, 5 Nov 2026 16:32:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=lisH/Ud3 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A77F1F00919; Thu, 5 Nov 2026 16:32:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896359; bh=vczxqCkOZFjD/nFEaTMrrUxCppRkHMvooX6kBAKOW2Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lisH/Ud3W5kd8haf1Krg+yuDeTu8PIE7kjovrT8VWq0YkMoeZ7+88kDFA6Q3YULaG 3EcdIWDu7yHsucKCFo8zfD0QO1Jh25e9yoE3KHEyuc3R3lmqVFpjsmzisdEeSbl3fz nRD0/jpstBeyk959OcQ6rqL08PMDwNDMuSB3/n1+n1i3FPz5g6mJYrygqljavIAuEj sRF93BjSF0YDOrL7ljjapHU0DjWziQniWqw+TxJt4tt732U92+QiwHmvVEuN4vGlST Refr//O2apMyAN5tYFzodVVSr1Qosy0e6aZI9R7y0+hsOQgQkNMY2cmyt0QhBWTzaO mSqu5vg/B2lFg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Daniel Lezcano , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long , "Paul E. McKenney" Subject: [PATCH 34/47] clocksource/drivers/rtl-otto: Move CPUHP_AP_REALTEK_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:32 +0100 Message-ID: <20261105163045.38862-35-frederic@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261105163045.38862-1-frederic@kernel.org> References: <20261105163045.38862-1-frederic@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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 3fb757c6bc7f..9b2e5862252e 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