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 CBC2A4F6474 for ; Mon, 19 Oct 2026 13:09:27 +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=1792415368; cv=none; b=Z/ZLspxNfcgD7C9A+O6Unt8/jKU+FTkwobO8jscIPlBGcMi5BNt5Nv0TdRMhN42Cfw2RU57E6IVFXCCrEA1ZyiqhED2P/sW1Pq4sIenPLUnICBc18lREzZCyFzIOtigmo37X3wBAqYeUTvGt4tqB2mvMMiUtkSO5ktFbrPXV3bQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792415368; c=relaxed/simple; bh=fUD2lZeGPiWcoYKfAfOlFoa8zcz2hSIRM0z1ROL5jsQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lCbwsLW0sFcJ5AwhtguqFccP0LjStczgbhCtTRpnE5+Rqa3zbhjAm/qXGma5HM1iLBKT2kLp1x2BBDN4xOrZVJd+r69lG+HFIA7oxcctUD93HVkebCK1bV1fGpv+OaRCfzJt1cvp2B5JanhTe6z7lySm6Iyf8pFnbIR1qpxrvVA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i1JbRB9i; 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="i1JbRB9i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF9E61F000C4; Mon, 19 Oct 2026 13:09:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792415367; bh=/Hl6KIPAlSY04bYS9lmEhkSD5cF0cy9b1qqqoBGium8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=i1JbRB9i1i0ehqHLTmVyNxQDdJECzTaN+VP/Dv1n3q7aduQlC+kef6yNWW/SowWTI JPBPaWwPSXtadJclQF+OKmh3blJhLfHyImRgBm+79oBGkEBXauKXzwPS4fS3r9P7SU FBCwyDmQQ0B3EQ3WPIEJUCFeVDa2g3Wij5tM/eTaX/As40uRApIa96QC3DDcQ3cBD7 ckliZik/pXrb4JuBdkZ8icmP89t1MTjGqSjTwVtSz4uiZtnKj5hJeUX7xp5PX6v/Y/ hQjQFk3k6dwT1ZJBukf5Ixctf4TeK1bqbxGHLOhTe1UJG5UJ0TJRsQKKPntWKFznrD jJDLtqqqsRbrw== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long Subject: [RFC PATCH 08/49] cpu: Move [CPUHP_AP_IRQ_EIOINTC_STARTING..CPUHP_AP_IRQ_MIPS_GIC_STARTING] range post stop_machine() Date: Mon, 19 Oct 2026 15:08:15 +0200 Message-ID: <20261019130856.49711-9-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(). None of these states have teardown callback. Move them 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 db73cdfbf1d0..126896b2c970 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_IRQ_BCM2836_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_IRQ_EIOINTC_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_IRQ_BCM2836_STARTING); + WARN_ON(st->state != CPUHP_AP_IRQ_EIOINTC_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0