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[45.249.212.35]) by mx.google.com with ESMTPS id 4si10782933edz.269.2019.07.25.02.30.57 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 25 Jul 2019 02:30:58 -0700 (PDT) Received-SPF: pass (google.com: domain of yuehaibing@huawei.com designates 45.249.212.35 as permitted sender) client-ip=45.249.212.35; Authentication-Results: mx.google.com; spf=pass (google.com: domain of yuehaibing@huawei.com designates 45.249.212.35 as permitted sender) smtp.mailfrom=yuehaibing@huawei.com Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 0E1A46F2570EFC64F2F5; Thu, 25 Jul 2019 17:30:54 +0800 (CST) Received: from [127.0.0.1] (10.133.213.239) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.439.0; Thu, 25 Jul 2019 17:30:52 +0800 Subject: Re: [PATCH] mm/mmap.c: silence variable 'new_start' set but not used To: "Kirill A. Shutemov" References: <20190724140739.59532-1-yuehaibing@huawei.com> <20190724143445.ezii7bwbbxxxtu2k@black.fi.intel.com> CC: , , , , , , , From: Yuehaibing Message-ID: <18e48f75-782d-0aba-4ac4-85347db74f68@huawei.com> Date: Thu, 25 Jul 2019 17:30:52 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <20190724143445.ezii7bwbbxxxtu2k@black.fi.intel.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.133.213.239] X-CFilter-Loop: Reflected 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: On 2019/7/24 22:34, Kirill A. Shutemov wrote: > On Wed, Jul 24, 2019 at 02:07:39PM +0000, YueHaibing wrote: >> 'new_start' is used in is_hugepage_only_range(), >> which do nothing in some arch. gcc will warning: > > Make is_hugepage_only_range() reference the variable on such archs: > > #define is_hugepage_only_range(mm, addr, len) ((void) addr, 0) Thank you for suggestion, I will try this. >