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=1793896371; b=GqRI8HVmHqCHU51wPt1mZSqo2olzuQVKK6et/bSWvz9GnQ3zm/oKfWqo45W7rl3DkPOa zLdiXzM7QqmpHLZLqVpmpzxW6KUxEQ4NQX9s2DTVovmDKlRXraCmVzLChn/IIxayGs9oT sde5F+FByT4nVKqnW20+Ra8KGl8v9qI+y19DBei6V6koQCizeK1/iUDvtVzz2PspKfbX6 ngE1YLCkhKTHrkK+3scsbMrrA40X9vaw5VwzrMCDbRo6lTIeIz+IBU+GLDlW7C/EJxeAl 1zgbWyx3aBpKoD/yOasa7vNqIq60ZknACLg4JC9nFls4LZVNnuVfQ5OYrG2slvsbiZQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793896371; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=6XhbcdWVv6I2mcCPOXrZAIKpQH+92kMfo3yd+PkyFP0=; b=DEeH75SUZpUp8WSwTL1ZcfXMnTkwT1JWQb5PMw9arHynqc6HV69ems5tuIw9x8h9KOD9 +HDYPbF3kEmKiuxdi45MOsS2qCbmiIAW1zSX9X5LSQ5mrQnYG44A4LQJywN4aeb1Hqs6t EzQe8Sa785LJr1ErbKR/2wNV+kiNKOu+oqsr0SOypH3kZpwlJ3NGY8ZCNdbG5V6+1w2HW 4uY2hpMVQw2/xbdGBSk3bWC5UZkf3HV9Zi77OVBM6EbrwDIX5PEIug5E+7s5XomnpXKuJ dGT1rgddwQHCXOW2WeJMJjJVocJ/h0a90zR1+iLAgc2tCyXsqB4ISBf+D7eeGvZFFtw== 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=n6270ni3; 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 3DF02606D727 for ; Thu, 5 Nov 2026 16:32:51 +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=n6270ni3 Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA3ED1F00919; Thu, 5 Nov 2026 16:32:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896371; bh=6XhbcdWVv6I2mcCPOXrZAIKpQH+92kMfo3yd+PkyFP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=n6270ni3JdY7qYC/LiLO7qRnnr5yR2SUS81N947AyflZPpI8YI7+kqzn4eZhr28ov H2xquVBe1Z59TQdW4X/0TvaBi0Lkw7Jy+Ed0tBk4m6Yf634oW4g/Kmdx4hOzSzxPbq ncOIQ6BAIgzz57+46I0NjAKkmhQpyl2HLYeTnMN/R0ztV763nuTXnMzeJ55MrIV4ns 9IAItrC89YVe1XWFOYEGmSgKZk4TPlAKmi3s/aIpnfDV70ccFFfndlN4BcR6S7LrNa 5ZJrcFkUv7HyQHr9kAWp1rlTUl7yZNqd1RYB4A7F+1uLtox6HbgXD9GMJPeH14yTu3 v/oRsqomesFWw== 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 38/47] clocksource/drivers/timer-ti-dm: Move CPUHP_AP_TI_GP_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:36 +0100 Message-ID: <20261105163045.38862-39-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(). This state doesn't have a teardown callback. 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 44f425cc48d9..93b8498e26c4 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_CSKY_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_TI_GP_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_CSKY_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_TI_GP_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0