From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C69CC608363E for ; Thu, 5 Nov 2026 16:32:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=4gurDrou; dkim=fail reason="signature verification failed" (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=AQMLrVGi DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=GK5M1RMSEaiUlcsoufzOBFDN0LMPHSq0SqTxsRUq/F0=; b=4gurDroubzz4hH6SQSYV2iMWUe /u8d6ykxaqnRpgkQ5jjv+W9JR5ZZ1pM9eDGjSmZHTTZ0DXmSQ5mbk83cWboGmuyBq7lAFixa95u1Y y8N0VmcMMlPIRkOYkvQQ3GwRSKHd1nhfu7XlcOJnSqtnXre2qppHDev3nncfLvKqGVKc3onpotMv6 MCMOOs1PC84C1GJawbxsLNzTMpbfj1Ka44hkitv6vVWiPtOJlr6cWaVbPRbjXFX8j1oALHNwTTf0x nwvrlsIaKp8njrFAQTyPe1uwZfZwfCRnUDlcDxJF15Zh4hcXT/43OEfSytTZ9TtQTQOiL0VmtZNNb bVVJo0ag==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xP0OO-00000009dd6-2PZ9; Thu, 05 Nov 2026 16:32:48 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xP0OJ-00000009dYV-2U2G for linux-riscv@lists.infradead.org; Thu, 05 Nov 2026 16:32:43 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 5A9524071F; Thu, 5 Nov 2026 16:32:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10B021F00A02; Thu, 5 Nov 2026 16:32:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896363; bh=/6b82kuaXepaTz9CSFQJQO5cBsE6n/mAmFqD9IAh1wU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=AQMLrVGiVtQdT3qwLRkoB4rp7fh4KL//wmhNTP+/Tk+B2u3N1CQMf5Ov5mbjs5H4e poSJt0QhIyiqwfwjaHU4+H26s4M1hLezmC3Z7zXa85i3rB70wovzTd1HWaAYJuApVK PDL/GBsJyPX75XytLz80kp2FghIUPD41WAtHayL6CjDGo4IbBMopa5SdIQHzp3ojEv WV3JSjGSOJzSFKQx0AAnfat4PFiPR37QJwECY6Zx2ciBmz34zs3m5JVFmvI55KA5d5 t5eVw8A57N5Dukm7jlpqh2BDP63yZ6NN+6psGP2k+ah8psl3w1b/3UsumnsldkCZVh vi1Ih4zBSOuJg== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Albert Ou , Alexandre Ghiti , Daniel Lezcano , Marco Crivellari , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Phil Auld , Thomas Gleixner , Waiman Long , linux-riscv@lists.infradead.org, "Paul E. McKenney" Subject: [PATCH 35/47] clocksource/drivers/timer-riscv: Move CPUHP_AP_RISCV_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:33 +0100 Message-ID: <20261105163045.38862-36-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-Archived-By: MIME-Version: 1.0 X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" X-Spam-Status: No, score=-16.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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 timer and IRQ disablement, both of 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 9b2e5862252e..04692ae09199 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_REALTEK_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_RISCV_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_REALTEK_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_RISCV_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv