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=1793896279; b=5QWa5bjmrzbgcP81G0x4PWRJk7eZhcNaTn7bDMa5oFlHxKs0Eu2JdDta4CamhSY/U6qN nwM+KBYp58H3D84B9pKCNf96rU8Fev0YPqflMlV4IQnMvXPA/AgEYcAYD4WnRG18+5qGb PSwpULH+HOr0bDXwHUaM8nLUGuExoSaDEPlmgzXNOvs9suFAwloKlLk7aUMpkK+BMc7R7 0ABgVi/Z8nh2Fsh5228qDtrW/hMM5Ll6gmuQ3SRw1OzyH0qsINwSqtqKImS9jx5Texbpk nwRoi2R1VQ+/vvfe4/YAB+kTJc4sGMJECDzsgi2mifOsOkvfxKCPFsgZ1SphjFWxWDQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896279; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=XG2bD8xKa5tEFlZQADIZsQYpUjCTx+lKZ/Xbled234U=; b=OZPaKkw8W7BdQf5KD63aCzyfSeYFSSyvY+iesnOex3wfNSRool9KReK0qJN6uSPn0VST D6pl5YbvkegMMbeIGLjVbjyY6Eb6LdUZEMy2H6dpI0b83M773w9/4rp7IbAAC03gbrxlG xOVARegn+45gPgY3aoK9/gVdMVNYzGOV+klYSXyEUqyICNqp7MHjanN+vvHKC2KwXpTRI eIdIRp/Y1sxOH/lpVhb35zKIsSS6SRQdlnZztBma0q523O+Jt7SADuImuuxmC8sstt817 X872yC/I/x6h8BY5TWxJnS+65+J39wGJXCmvRGs7p0oglsd5URiozZJF7VmBjeL5gaw== 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=foWkJbrw; 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 80C5B60A3810 for ; Thu, 5 Nov 2026 16:31:18 +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=foWkJbrw Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48DCE1F00A18; Thu, 5 Nov 2026 16:31:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896278; bh=XG2bD8xKa5tEFlZQADIZsQYpUjCTx+lKZ/Xbled234U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=foWkJbrw5nzh1b5TLlrS7DD7hYKjbOS796KHJeEyMScxQGwMRvzUKxf3xbLbUBA9U z5c5pLzTykJyLW4jZ9SrQ9cQY/F3/BEcwIbGdNJO0wrVLVdCD/qPIHxFs9q/dWIFlj nfMPpf/tRUdqcpr1outXF2oUSM/JaUqS3qYPy3PhIhbNzBM1BL7Hxc8LbQS4LKUPid oEVArv/aGBIGbPD2JaXavAhGC0Vw9CF72lZHQf61n2A5ys8ZkahryJzo8tfvt/c28+ 3eO6W76+yDnfBfa5a99xJPmIwDLUmWZh1mdh/DdlWKwzciBS2Qo5aAuLAbZVwA4Ro2 FwZOurUQ22JRQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long , "Paul E. McKenney" Subject: [PATCH 08/47] cpu: Move [CPUHP_AP_IRQ_EIOINTC_STARTING..CPUHP_AP_IRQ_MIPS_GIC_STARTING] range post stop_machine() Date: Thu, 5 Nov 2026 17:30:06 +0100 Message-ID: <20261105163045.38862-9-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(). 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 2e162425bfc7..ac87ce01d77a 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