From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E54EEC3A59D for ; Thu, 22 Aug 2019 07:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A11A0206BB for ; Thu, 22 Aug 2019 07:52:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="UsKrpxXP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731709AbfHVHwO (ORCPT ); Thu, 22 Aug 2019 03:52:14 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:42552 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730037AbfHVHwO (ORCPT ); Thu, 22 Aug 2019 03:52:14 -0400 Received: by mail-lj1-f195.google.com with SMTP id l14so4619279ljj.9 for ; Thu, 22 Aug 2019 00:52:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rasmusvillemoes.dk; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=rCTePgG7RYdXOtsqMn/EGiKAq/u1kBDj9aPT9Dfgczw=; b=UsKrpxXPuL+ZKlwuc+ITBE2tuLBFTuT+d1kgO/pLG86lqhfUTqbrbhF74QLrk18Pzb aOSONgtap5+EOa0YnJJ0gx+bb3jdFQaJOFn7UB33gwPAQlJWy8VDqNOK6ZTbyqKmTSVM pvhaBbl0n3KZ4qFLlOKtQ5UHKddxuxb/jsrZk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=rCTePgG7RYdXOtsqMn/EGiKAq/u1kBDj9aPT9Dfgczw=; b=l2RtoUtQwH+8Wa9whFkQZYBZXxLPKAPBCiB7cUvUg1LovP4F0HzeRO3ROE+YiV0mU8 KT8FuR75RBnNdTzTvNMsqitLVABvTwwWHUpk/urLuhhEF6Lwl4qJ/2rqOSZKIW9uCgVf EMqx6Ag52HA8MXnA27PMxkeopAnu7XBbp5Dk5xV7EQd5cz4THKc40+KZgIhYkQlAvlPP 0k1RNNIeB2AhPnqvrc+Yg9rkbgd9pNgv2c4Qct8txc3XPGeircaMw0ykNAIfQ4kU2Z1Y t/TVqnPdqV45MbltLu6xGJuOPUtbIL2PLl17XCQiu++DQ7UtnEhdntnr3UVyA/WwB8Fx e5Zg== X-Gm-Message-State: APjAAAW4E6Bpcr1EdZPsRkv2ivqKN6YyYEha/2YPWF3VIqUAG9KWjoK1 llTG+PxXx9B3LGBaXl2C7PiGNA== X-Google-Smtp-Source: APXvYqxV31j+6lX+In5ijbALOUcTYMKfDsts8VM2xlJCyXRU+AgvcViEXDeB82pw2Jxiz7jc352mNA== X-Received: by 2002:a05:651c:104a:: with SMTP id x10mr20266511ljm.238.1566460332223; Thu, 22 Aug 2019 00:52:12 -0700 (PDT) Received: from prevas-ravi.prevas.se ([81.216.59.226]) by smtp.gmail.com with ESMTPSA id x13sm3699675ljm.7.2019.08.22.00.52.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Aug 2019 00:52:11 -0700 (PDT) From: Rasmus Villemoes To: Andrew Morton Cc: Rasmus Villemoes , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm/init-mm.c: use CPU_BITS_NONE to initialize .cpu_bitmap Date: Thu, 22 Aug 2019 09:52:07 +0200 Message-Id: <20190822075207.26400-1-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org init_mm is sizeof(long) larger than it needs to be. Use the CPU_BITS_NONE macro meant for this, which will initialize just the indices 0...(BITS_TO_LONGS(NR_CPUS)-1) and hence make the array size actually BITS_TO_LONGS(NR_CPUS). Signed-off-by: Rasmus Villemoes --- mm/init-mm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/init-mm.c b/mm/init-mm.c index a787a319211e..fb1e15028ef0 100644 --- a/mm/init-mm.c +++ b/mm/init-mm.c @@ -35,6 +35,6 @@ struct mm_struct init_mm = { .arg_lock = __SPIN_LOCK_UNLOCKED(init_mm.arg_lock), .mmlist = LIST_HEAD_INIT(init_mm.mmlist), .user_ns = &init_user_ns, - .cpu_bitmap = { [BITS_TO_LONGS(NR_CPUS)] = 0}, + .cpu_bitmap = CPU_BITS_NONE, INIT_MM_CONTEXT(init_mm) }; -- 2.20.1