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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AB75C433EF for ; Fri, 14 Jan 2022 22:07:28 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2268D6B0123; Fri, 14 Jan 2022 17:07:28 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1D6EE6B0125; Fri, 14 Jan 2022 17:07:28 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 09DB46B0126; Fri, 14 Jan 2022 17:07:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0250.hostedemail.com [216.40.44.250]) by kanga.kvack.org (Postfix) with ESMTP id EB5E86B0123 for ; Fri, 14 Jan 2022 17:07:27 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id B9DB28221941 for ; Fri, 14 Jan 2022 22:07:27 +0000 (UTC) X-FDA: 79030279734.23.07D7457 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf07.hostedemail.com (Postfix) with ESMTP id 5051040003 for ; Fri, 14 Jan 2022 22:07:27 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4AED6B8262F; Fri, 14 Jan 2022 22:07:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4921C36AED; Fri, 14 Jan 2022 22:07:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1642198045; bh=9PlbeLhugCgVuTC0nx8YtiRpKMewE3NTT+OCUMOAQ4Q=; h=Date:From:To:Subject:In-Reply-To:From; b=1Tbh3snbT7NNc53tO4wsborI/2qklFZA9aexmRw1vvQ9+XXJKK6mHiwEcjP9eufL9 6+LxEDXRdCIv9/WpmvjFod7PCJ78YXOPIZAgWGwIv0k4XcJSC1pinD34bvGC6dOZnk PjKye3MQQugt9/ubN/1l5aQd+grk2FG4sog/cDHw= Date: Fri, 14 Jan 2022 14:07:24 -0800 From: Andrew Morton To: akpm@linux-foundation.org, arthur.marsh@internode.on.net, linux-mm@kvack.org, mm-commits@vger.kernel.org, sxwjean@gmail.com, torvalds@linux-foundation.org Subject: [patch 081/146] mm: page_alloc: fix building error on -Werror=array-compare Message-ID: <20220114220724.BNY5-7-ga%akpm@linux-foundation.org> In-Reply-To: <20220114140222.6b14f0061194d3200000c52d@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 5051040003 X-Stat-Signature: k7m7ic1m43cfdwkd3dsx5i3jxuxqau3p Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=1Tbh3snb; spf=pass (imf07.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-HE-Tag: 1642198047-782044 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Xiongwei Song Subject: mm: page_alloc: fix building error on -Werror=array-compare Arthur Marsh reported we would hit the error below when building kernel with gcc-12: CC mm/page_alloc.o mm/page_alloc.c: In function `mem_init_print_info': mm/page_alloc.c:8173:27: error: comparison between two arrays [-Werror=array-compare] 8173 | if (start <= pos && pos < end && size > adj) \ | In C++20, the comparision between arrays should be warned. Link: https://lkml.kernel.org/r/20211125130928.32465-1-sxwjean@me.com Signed-off-by: Xiongwei Song Reported-by: Arthur Marsh Signed-off-by: Andrew Morton --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/page_alloc.c~mm-page_alloc-fix-building-error-on-werror=array-compare +++ a/mm/page_alloc.c @@ -8228,7 +8228,7 @@ void __init mem_init_print_info(void) */ #define adj_init_size(start, end, size, pos, adj) \ do { \ - if (start <= pos && pos < end && size > adj) \ + if (&start[0] <= &pos[0] && &pos[0] < &end[0] && size > adj) \ size -= adj; \ } while (0) _