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=1793896369; b=2eYYgy7H1VM953Qn31hvw1TKWX9fRBwadcuxqgMXYDGTy5Hfc8Fa3+UysgYu6joO64Ak xFz/sQX7BFOYi/CPDZbj8IyqJravQ5aQLAIok73Sdtyl1xqPG/tUjgqhq9KoGznPARlGX iOtxTdO+52VsjGR4wPnHZ9Ik0bDFY08lnq9Sk/Tgv1pJMgCKJmRYPTEP8BZPiy9m+YxfS lyqBpxBo+xqASTl3bz+UWB1KEEo2Cj1tqtCaliXexsy+XQSU+9ldqJIw6gft+NhviUUc5 AZqH4ym93y5DfI6nH/5x/FQMb2lWMSK9ZUso9jiK9pEcZh/ca6c9VRJJBEg+tQbT1/g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896369; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=ONaf0T7i5HmgMhqyqYNDKCC/0CiSVlL4yh8Lun4liAw=; b=E3qCYo6OmdjL/Bp2ZFEyInwb6Zn7Lr4385EIWzCMWEs5BeegzMKBCrMjnYJ9Oll6tAMK Bwmp7s0i1AHvZyCKNV154Pu0W3eSoP7zmWFssXuCcmy6JNVsr936J73FbN8pbL7pFeJ+7 Jrbd9suIZ9LL1AUpyQ1Fvo4QyhQMV53i3UrRUZpXJrHpW4k5fJidrx9t3Wr4iyhTfk2+B DmLL42OOxRJDj7SSGClKt6L1a3Jrtgxm22wqcwjx2qChPzSLM1j0qLjPS8YTAx5Dsmwfo wz6pApCq0KhIwwjFftPp1OBXO/lURjrW4gF56vq3K9MO4MT1dzG8gpQFH/oRqYeTYyA== 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=IsJENWZm; 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 A583A606D711; Thu, 5 Nov 2026 16:32:48 +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=IsJENWZm Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3AC061F0093A; Thu, 5 Nov 2026 16:32:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896368; bh=ONaf0T7i5HmgMhqyqYNDKCC/0CiSVlL4yh8Lun4liAw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IsJENWZmDAfU3ucF95Tl6/ktNdvHoT/KTIcQFVH2RGKcQGpszTMzCeCmrBpoDI0OY WIobr4HjZ+I5XlDUehjb8/6JaAXFCAPhsgGEAGdwHXQ9sX+0+LqPW0gzjcUbN2Ikn2 /ksQgq9vy8peGqR2vt5k1+ADVgOSz9MxnEO+XHPbHic8/h07QPhc4pRYpNGLnUOhCC yCGrb6KQtFkTlPVhTZCTN2JnpjAsaGKezZwMRVNjSFUwT5GOaHUEqmV0HAGaYw6hvY b5oqL8Ah1YKbcB9kAvD6+OndjiYtrhWDqVGQCGriBY/znTsPVWhcOXBzBvTSwXmHHw RgsLoxTJh8dWA== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Daniel Lezcano , Guo Ren , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long , linux-csky@vger.kernel.org, "Paul E. McKenney" Subject: [PATCH 37/47] clocksource/drivers/c-sky: Move CPUHP_AP_CSKY_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:35 +0100 Message-ID: <20261105163045.38862-38-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-csky@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 01c343b4daea..44f425cc48d9 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_CLINT_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_CSKY_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_CLINT_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_CSKY_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0