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=1794047216; b=PlxLeILOPO+O+mK8myhi8X/5U4ta1nsP4eR0TenMf8zDJ8aeoNdeSB9TfSDDmA1wT39H U5pdcEG1dNxQsAVtsI8dEImXcsC7ZkMGa/TZwzFsuz3eXyEiYz7OJ5kfLia8zKuVLD4A5 A+xZgLQg1d0KvmkqdN1jGyNsOpScvfqgctFxhsY4cTtRbQIVSmtr3n62pXa1/AFIh6jsP Pofr81n7vGjj3FUUi5NtW/EKucWQtF4DgLBmc4QZmh3+/A/nPWfaNfAmlOc/N2J8Z+VMd 7a6orzlD7MV2WXHbsfv9T6hIIYC4018nS92SRv96/s4TS9Kdo8qQ9V7+O//V8yQnMSw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794047216; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=CPPuUWnwcuOZxRuXmexpOZ5qEiWADGPqaCReiNVLo4k=; b=mY5LFzWKVhGw4WAMKDbhH5z/RinWlvsV4HCQ2K8slFLF+wTvxTjIbDadayeaiVO9vbEL 7UjnGaFtPEBm4hQVRvZ3XwG8TsJix75AyyH2iqB1hUDrPtWvQF2zRsqGZmcSKowkj3je3 VSX4zT3nhf9sONMTWXBVUlvtDBE8evllv8XvNg/ZT317wwH+FsOpbRw1mu5YXpftku5q2 UAL/ItDoU4qo6nHF5GD+6nEdq8fUEZ+huz+sgp1QFfYOMPMRtBIUAu/q4oGszSPwh7tkr 3mhG95AofieIWjyzGBITNVESAjuKCKNr3/a6NCjnMY2LnAed0NYgH2Ujvl6S0Q/UZiQ== 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=XfJfqxLG; 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 8EF5A606A32C for ; Sat, 7 Nov 2026 10:26:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=XfJfqxLG Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09C8D1F0089F; Sat, 7 Nov 2026 10:26:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794047216; bh=CPPuUWnwcuOZxRuXmexpOZ5qEiWADGPqaCReiNVLo4k=; h=From:To:Cc:Subject:Date; b=XfJfqxLG9Kp9fGkqyTx5vFjWJpBgNdNNz9giiKx3eOyHifBR+rqdrAzzAyUrG1+DF cVWrEaKa1mKpm/t9rLrKrQAeFUw3eo4ui8TF6/+QsWKxE7Ji0nf97De9FtzJ9YMQoZ ldUz/puygCJpt5OkEBuEUbNCiwqNfwN4KoXcMlZaGi7d+BJpGeJM/mP2T2xDeArmbM nKNOGC9AePU3SoTI8wzdHPhl6pWh9q1VsVOytjA+uaroLPdX1wKN+bXCiFAzTxeqWT WNc7JiNdSvXGn56jVv6AW8PMS3O4I32JMQNAa23VQiOgTZYVcgKRQKNPT7vRjZor6a /CM74AP2kj3Dg== From: Sasha Levin To: chenhuacai@kernel.org, chenhuacai@loongson.cn Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] LoongArch: Don't init & online empty nodes" failed to apply to 6.12-stable tree Date: Sat, 7 Nov 2026 05:26:54 -0500 Message-ID: <20261107052654-failed-6.12-87c6d144bc7b@kernel.org> X-Mailer: git-send-email 2.53.0 X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 87c6d144bc7bbed0c4573848b9c92006edca7848 # git commit -s git send-email --to '' --in-reply-to '20261107052654-failed-6.12-87c6d144bc7b@kernel.org' --subject-prefix 'PATCH 6.12.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 87c6d144bc7bbed0c4573848b9c92006edca7848 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Tue, 27 Oct 2026 22:51:23 +0800 Subject: [PATCH] LoongArch: Don't init & online empty nodes Don't init & online empty nodes without any CPU cores (and memory), in this way "lscpu" will not display confusing empty nodes. Modify fake_numa_init() to make sure at least Node-0 isn't empty for the FDT booting case. Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen --- arch/loongarch/kernel/numa.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c index c96c536237151..7dedc134ddfe0 100644 --- a/arch/loongarch/kernel/numa.c +++ b/arch/loongarch/kernel/numa.c @@ -216,6 +216,8 @@ static int __init fake_numa_init(void) phys_addr_t start = memblock_start_of_DRAM(); phys_addr_t end = memblock_end_of_DRAM() - 1; + set_cpuid_to_node(0, 0); + early_numa_add_cpu(0, 0); pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end); return numa_add_memblk(0, start, end + 1); @@ -244,8 +246,10 @@ int __init init_numa_memory(void) return -EINVAL; for_each_node_mask(node, node_possible_map) { - node_mem_init(node); - node_set_online(node); + if (!cpumask_empty(&cpus_on_node[node])) { + node_mem_init(node); + node_set_online(node); + } } max_pfn = PFN_DOWN(memblock_end_of_DRAM()); max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn); -- 2.53.0