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 71CC2606CBD6 for ; Thu, 5 Nov 2026 16:32:43 +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=uOCcgmFW; 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=I7hvwOgv 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=6Sio3hJvKR6h58p8Y1ykkiIcDsfBW4R2uXb8E44RdAU=; b=uOCcgmFWpa6PVPfKL2/Uz7LKI1 A7v+xLk+sO/x4JVGIiJlK7mElotcppOBHg55s88CWSfISptmBaHqjH/PUa5uQiUeNPKVW4tONAh5n 9vcHiheW/42UhHeAwbEUZRenAgnEEkd3Ep1uVrmJ1zIGsppYe3yOstzzy72rJCyzrKpyvPEyF9wmx GuW/NkS6jUOZCxHytix1d6Adh0QbqEuuAxla4mxKJpEeLMdYRQd25I/dyAoP0c0Zh990/EQQwxqT0 uaBIzCQyrvZasbG6YUR3kpt0Egc3ggVTFQVzEnK1ac0QSUhqc8O9KXa4zVg2TvYv5NGf1Vyppqj9W Xsacm1Sg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xP0OG-00000009dV3-3XGI; Thu, 05 Nov 2026 16:32:42 +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 1xP0OD-00000009dQh-1jgQ for linux-snps-arc@lists.infradead.org; Thu, 05 Nov 2026 16:32:38 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 2FF4742D51; Thu, 5 Nov 2026 16:32:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCDA51F000C1; Thu, 5 Nov 2026 16:32:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793896357; bh=1QYv6eJfoY0AD+wV9/qT5A8worb2ZD6rE8Lmv/XuSb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=I7hvwOgvtbHLs7Q91y7YbuBvYoWXhxnPjTQ+0ctrocYtftCoh2R+ip7Emtc3Voqn1 JfjdAFE1cebCf16cKvAFtPAC9vdxkyYEmbx07SkKNLM6bUhIBieTBwQgG2HtfZZVWP 4YB6ckKdZ4h4HeqsXqFpA0GJz3R60vxoITIVmeQVb19lYSEZ+tisd09hE/HXe2XsEw uB6Fos0HsKaBajK5AWZcx6Gw103IB8Ecz9japmGWSS+kLUq7RpRonqTUjTckAhdZcH Yl6jj4DGtsNNGwj3/1oK3YVFA/mIqfaY0K0s1BEvg1wXs/R9T9Ee9MsYEl8FplIjTi 4lWQPgAmij4UQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Daniel Lezcano , Marco Crivellari , Peter Zijlstra , Phil Auld , Thomas Gleixner , Vineet Gupta , Waiman Long , linux-snps-arc@lists.infradead.org, "Paul E. McKenney" Subject: [PATCH 33/47] clocksource/drivers/arc_timer: Move CPUHP_AP_ARC_TIMER_STARTING post stop_machine() Date: Thu, 5 Nov 2026 17:30:31 +0100 Message-ID: <20261105163045.38862-34-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-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" 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 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 4451c5997cc6..3fb757c6bc7f 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_MIPS_GIC_TIMER_STARTING); + enum cpuhp_state target = max((int)st->target, CPUHP_AP_ARC_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_MIPS_GIC_TIMER_STARTING); + WARN_ON(st->state != CPUHP_AP_ARC_TIMER_STARTING); /* * Invoke the former CPU_DYING callbacks. DYING must not fail! */ -- 2.53.0 _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc