From patchwork Tue Apr 26 08:20:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 568046 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AD09C433EF for ; Tue, 26 Apr 2022 08:24:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244140AbiDZI1N (ORCPT ); Tue, 26 Apr 2022 04:27:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239221AbiDZI0n (ORCPT ); Tue, 26 Apr 2022 04:26:43 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C8A13CFEF; Tue, 26 Apr 2022 01:23:13 -0700 (PDT) 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 C1152B81CF7; Tue, 26 Apr 2022 08:23:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CB5EC385A0; Tue, 26 Apr 2022 08:23:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961390; bh=egwIRRSMu30r1F9VMK/dU1QtErCVb4A+qEWO9CxAxOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hQ/rRthtzBNv5twHv4GAN/IkHNQV94PL+CxhsjbRkfqiKmNd6luhRtuuWsJougfoR qA38CCwQAHGtw86NSg1tI6rc75BBZgPqEPoxO2/oI36yeIn3kHo59uSe+C+PkxXXut 9dOKWrL0gn+8Q4ZRIQa1FSrmu+aSqy2LbdRKEOEo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiongwei Song , Arthur Marsh , Andrew Morton , Linus Torvalds , Khem Raj Subject: [PATCH 4.9 02/24] mm: page_alloc: fix building error on -Werror=array-compare Date: Tue, 26 Apr 2022 10:20:56 +0200 Message-Id: <20220426081731.445639121@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081731.370823950@linuxfoundation.org> References: <20220426081731.370823950@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Xiongwei Song commit ca831f29f8f25c97182e726429b38c0802200c8f upstream. 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 Signed-off-by: Linus Torvalds Cc: Khem Raj Signed-off-by: Greg Kroah-Hartman --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6504,7 +6504,7 @@ void __init mem_init_print_info(const ch */ #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)