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[134.134.136.20]) by mx.google.com with ESMTPS id o6si14274257pgv.273.2019.07.24.07.34.49 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 07:34:49 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.20 as permitted sender) client-ip=134.134.136.20; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of kirill.shutemov@linux.intel.com designates 134.134.136.20 as permitted sender) smtp.mailfrom=kirill.shutemov@linux.intel.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Jul 2019 07:34:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,303,1559545200"; d="scan'208";a="171518552" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga007.fm.intel.com with ESMTP; 24 Jul 2019 07:34:47 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 39248130; Wed, 24 Jul 2019 17:34:46 +0300 (EEST) Date: Wed, 24 Jul 2019 17:34:46 +0300 From: "Kirill A. Shutemov" To: YueHaibing Cc: akpm@linux-foundation.org, mhocko@suse.com, vbabka@suse.cz, yang.shi@linux.alibaba.com, jannh@google.com, walken@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] mm/mmap.c: silence variable 'new_start' set but not used Message-ID: <20190724143445.ezii7bwbbxxxtu2k@black.fi.intel.com> References:<20190724140739.59532-1-yuehaibing@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To:<20190724140739.59532-1-yuehaibing@huawei.com> User-Agent: NeoMutt/20170714-126-deb55f (1.8.3) 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 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) -- Kirill A. Shutemov