From nobody Sun Feb 8 16:12:21 2026 Received: from mail-wr1-f52.google.com (mail-wr1-f52.google.com [209.85.221.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B84811426F for ; Mon, 5 Feb 2024 10:01:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707127285; cv=none; b=jjWkOZgDfDZbbpsRIbaySzVk23GpmTiFhyV2Af0NJbPRoy4xwKc85wsijUsHh6w7av/F5yjRuuq2YCwB9rU7+Bo6OuvGViV/EWeiIHPBFnK3Kbz9sVwMmi4aM19R9SQU8CTWCgqL2C7ie/B/U2yNRjVwQ5jXW8IUSxrY30V3l7w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707127285; c=relaxed/simple; bh=017RQOMONvnuGTW9DOEqdTXkZ2q9GflmjTVjuejRJlo=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=KLUdLghu9BqpZlgd/D2AwutXeVCzw06Kc2dke+Awl6E3isJIcxFLXU6wgh9K7RXP0W0awt5r6LgzlfVMHlEUZkBS6HO5se2Bkd8g0RPs5AMe76auEhnifswb5kdHgvJPcaYX7Bmc9YQcEbB485CQUYEkUaaS0iQ0MDrs3T6GL5s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=QteFg9OX; arc=none smtp.client-ip=209.85.221.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="QteFg9OX" Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-33b0e5d1e89so3339713f8f.0 for ; Mon, 05 Feb 2024 02:01:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1707127282; x=1707732082; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=byoZEbZbwQaBw7NkssMZivW+HtsUJ0U6vmYkO81EoAA=; b=QteFg9OXn+knqSSbmstshjH2yMqEbQfWqyCGdKn5Qh5bwhLTQVKFwE0vlkaKD1O95D YeO9HkJ1VpmXAA/VL1sZOfkbDy25QXKdxvLB+c32Kpz5DRG9hVurhAg6/YdNhByyqwI6 7ZoeGa79pD2s/UqEWtmysEmN8Uai/G35sCZi9JtarDJT7Nrr95Vx9hKsi80AtzQl90RX 1u1e+5fOBaGZTA8k2MNNF+dasKxH3HyMGcowLW+9HYh1pv9KtPFmAlmeQyE2WnEjk+DO Ra49rYPG973EJiHkh/Op2fBxEBafuDEFgzJDwQ7wmsC1WHwD/t+0AVkr4SOaHor4htvP EsNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707127282; x=1707732082; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=byoZEbZbwQaBw7NkssMZivW+HtsUJ0U6vmYkO81EoAA=; b=e9M6WoP2ISZY4uwPgC94mT/RACB9soT8+Fe42K0lYsyI9wwFeZS32LuslWM7E95FJT b0891BBdBtE5KzyQ7v9tdtD6HzWqYuGtDREB0ZttroxwtRftMzJQcG5cN1C1CiDMqa3X Cn6QYTwAHQz1Po/p05NUnvoSnWWwdZoEgWyc19pbOarGsfrsqBa7QvkmNYHK5f+QOS8J 3Ua1CCet8gutjvp47X1m06VZRx6M6xx5/SUwwI7Je3xwh72+aExD+Jm+Y66ZcmxZhUEN /BifrI4nvTlJErzAmvbZ5zcOfY3phdAq6A3BkTK20UHz9wKqbHg3HBXagiteF5bjOjV1 Tz+g== X-Gm-Message-State: AOJu0Yza3tNg7KorvhzjsOSvIA/aTm2rd6FUVeWqg+GyZo4YmU/Ka5Qg qn+YiHGQKkvy433tJimMCyjUF1ihQI1kQ8tDM6laJs0G9UF51d7IZB+r8QLdeA== X-Google-Smtp-Source: AGHT+IG1bJJuA82rQpt37UUK/dBgP5YdQHsUxr+ZUgEjUTFxvDUr+8eAGebzLeDfICAXpuGXZ498+Q== X-Received: by 2002:a05:6000:701:b0:33b:3ccc:57a7 with SMTP id bs1-20020a056000070100b0033b3ccc57a7mr1942797wrb.7.1707127281699; Mon, 05 Feb 2024 02:01:21 -0800 (PST) X-Forwarded-Encrypted: i=0; AJvYcCVYLoYJPb95xsZ/cTAtLl7NgF6Jp3hvZWU4v52PM5KcYAUyM8QxNBoRPzLsz7S7Rcv4lp2+xmZfpoZ5Q7pcvPKGDcLC+g== Received: from p183 ([46.53.250.163]) by smtp.gmail.com with ESMTPSA id n4-20020a5d6604000000b00337d6f0013esm7653667wru.107.2024.02.05.02.01.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Feb 2024 02:01:21 -0800 (PST) Date: Mon, 5 Feb 2024 13:01:19 +0300 From: Alexey Dobriyan To: Thomas Gleixner , Peter Zijlstra Cc: linux-kernel@vger.kernel.org Subject: [PATCH] cpu: mark cpu_possible_mask as __ro_after_init Message-ID: <41cd78af-92a3-4f23-8c7a-4316a04a66d8@p183> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" cpu_possible_mask is by definition "cpus which could be hotplugged without reboot" -- property which is fixed after kernel enumerates motheboard capabilities and hardware configuration. Signed-off-by: Alexey Dobriyan --- kernel/cpu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -3107,10 +3107,10 @@ const DECLARE_BITMAP(cpu_all_bits, NR_CPUS) =3D CPU= _BITS_ALL; EXPORT_SYMBOL(cpu_all_bits); =20 #ifdef CONFIG_INIT_ALL_POSSIBLE -struct cpumask __cpu_possible_mask __read_mostly +struct cpumask __cpu_possible_mask __ro_after_init; =3D {CPU_BITS_ALL}; #else -struct cpumask __cpu_possible_mask __read_mostly; +struct cpumask __cpu_possible_mask __ro_after_init; #endif EXPORT_SYMBOL(__cpu_possible_mask);