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=1793896272; b=p0kRnR3gjmHYDuZcJqX5Mh63dQxiM//eoPSaLlozSJBd4OzDPWYBugE0spR9mkrUrDi+ M8P0k5z6ZmEqz3Z3gGUO4RlRzmIAMqyXiK87IwZzICN6NQxgM2eBa8Q88m2ZApa0b/a43 aWsCN6tZFdTuDn4wjwyuYsVThvaNf1mCb2AE7/sv1ufmcEFEHIhPI0IN/21m1gDMnX7/9 oQHvKV18+GYoGZlae9dD/ril2xo9Ij/KTfH3X/ETSBSeKTB6piRrK9s+tHzgRGVAEsngw CZyfVmrMWYfkk9nLZ8Vg5wUxjLMj6kxfR97P6JSF6MDIF0lvQEww988ddrAzJoKtLzg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896272; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=7iuN1CXDA64z7LJqyDcE7mTOMVTLzez8bU1Yxw/6RkI=; b=V8b6UDevuX77ONvV1sSCBbda0Sr5qecC5qBhDlVfD9taGr6TmpJbnvs2xjxCqW/ncXTs Z40tUNFWcEZ+YFjznD1Rn4glWTV9RUn6+ikm6A7GvbsvDNMd8H+ro1F6i4M4TWpGCdFdg hX0bmOFoouP2WYCNq2OwBwYzG/nVHTVVA78J9j0f0gmktWK5cRx2ba9V3Iv07w8tl+sXR y+6WzKpRhl+1bimpadn3q2U5i89hFo5CuKH1Eg9KySuukFidP3B4LQ2KPjT7mh0ype1iJ o6NPDt/4LPPimt7XEkfGJinpskLKV5YG4uT+fPdDlFDj8NEjQAOydidC4keOiXl6jgw== 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=FJ9079hU; 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 77EF260A2639 for ; Thu, 5 Nov 2026 16:31:12 +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=FJ9079hU Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F6091F000C1; Thu, 5 Nov 2026 16:31:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896272; bh=7iuN1CXDA64z7LJqyDcE7mTOMVTLzez8bU1Yxw/6RkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FJ9079hUCth3yidIrWSIk5yBUUEBXXRTwY/gYRgujQFEqi1GELidpxi9CLv1+D4UQ 8etNrMp5y38KzehtxqZaQ8xqIZfu8qnRWY3UYiRLpxsZZEBC73UYPCiNUwWHF0ZlKd wLDDIHLYx1jwqDt9E0/W0hjvFg3yt9fZWeExox1cbu5QXoIx6aujOYK9yalPz+caaK QBdYWyuO1CQTP925jS5VrrazjuxJC8gb4I//ImyHNDD3dTPRBX/8gFJ8qWunG/Ovup wh+4zA9UcQZXy3UyjM7Ig8ZUzojufU0JEs3S4aEh/AGk9ArajbSHL8NCh21zpq1X6j IdadRrZpoAoAg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long , "Paul E. McKenney" Subject: [PATCH 06/47] cpu: Move CPUHP_AP_IRQ_ARMADA_XP_STARTING..CPUHP_AP_IRQ_GIC_STARTING range post stop_machine() Date: Thu, 5 Nov 2026 17:30:04 +0100 Message-ID: <20261105163045.38862-7-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(). Here none of these states have teardown callbacks. Move these teardown callbacks 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 acc6a0e6446c..cb0eb71c27c9 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_CPU_PM_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_IRQ_ARMADA_XP_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_CPU_PM_STARTING); + WARN_ON(st->state != CPUHP_AP_IRQ_ARMADA_XP_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0