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=1793896348; b=K7Z5JK/J6dbMBSCHo41sSDcXfdYicGDWKapvrn25PultubVl8QfPRjZwp7iLCUnI6b/0 XHHN3vIkklZaQKhYJ6fXsF6y8LEDUJSWA4n8ZHuIuNtfWaN6EGvB89m1lFt1687BuufKN d30OAvaNxWksID7/Xv0yZB+e7TFdVi36O7XVcR7DLVDYkFJnSiNYdJz7Tnfc/57+37ZiP ehY9yWO4eOjlYZJezQffpLgdnP5IF1baerHiqM3S1+WRQK9L5+yygZyb2Sa6XHrQqo7u2 recrvRLP/a9pPP+tE7rzREO4iVc/q/gO+d4Ow3Py7P6pBIRYLunOAtiJ739tllhRR3A== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896348; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=OPMMO0d+VXO9ICqZUUEFSq+tSoxDgooDUAqX3oem3F0=; b=EosyvgU0FRa2jPaJrPMNvKaKn91WOaIJxcx5Xbjc2z1j6/HLPkxwdgbf1g+FBK2+BdpP fm54ClL8v4Dd7AERtNzcgn9jGvgpUsaY1Djsx3L1wQea4f5Agts11vwF4piX+pIu6WCcf iuAxm4J5ktqKRr19IFUwKH/jZRiukrnKy6yiV28C5nmdTXfhXxTjJb2/hzG+aoQGROeaO d2qfyzkJmTAZFbt0hYhnuw33YTelj5c5YNdVFnSwPNF1I87pSS6WqLY2gVBzA3H/nwzXP poq5LY1ZbqiBqgSthyNJTRJPxRUehDR1GcWVckip1IEsxeKnVNuHWtWuP9H36ldEIGg== 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=VclYDwv7; 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 2060C606D838 for ; Thu, 5 Nov 2026 16:32:27 +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=VclYDwv7 Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA89F1F000C1; Thu, 5 Nov 2026 16:32:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896347; bh=OPMMO0d+VXO9ICqZUUEFSq+tSoxDgooDUAqX3oem3F0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=VclYDwv7bL0v7D6h8c3lBgZv7Xf8vS6nqdU4DciXbPDyDlypJEDtmCTNdbvhWgwuU APm4TJ4apO24X9luy5tUqojphPbkZOr5qlpJBn0htG/BufP0Q76eyJmWM2GfCUvYck 6J7AwUUsUl0stGsYB21IphWNrJuZJ+2RBRb6ANck7paJUPQRCbi+hgC1jOe0xDIocg D3HtJPNNrAK7OCFj5Z4ml7wMFrtVBCWOup/MMi8TLkvZzXj1KtYD09UGJ+iqWeGy1n WYONCZ/WMyQQ6Zxt0eVKZmhjWkn1wes5HGK7Lrba+FdHlaCO68XiYmQXWPIIZ9gSrT JAOKFUHpJk/BA== 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 30/47] clocksource/drivers/armada: Move CPUHP_AP_ARMADA_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:28 +0100 Message-ID: <20261105163045.38862-31-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 teardown callback here simply performs IRQ disablement, which can run concurrently with other CPUs. 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 27acdd9800cf..8a563de99dc1 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_TEGRA_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_ARMADA_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_TEGRA_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_ARMADA_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0