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[195.135.220.15]) by mx.google.com with ESMTPS id n8si4424985ejh.169.2019.02.19.06.18.16 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 19 Feb 2019 06:18:16 -0800 (PST) Received-SPF: pass (google.com: domain of vbabka@suse.cz designates 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=pass (google.com: domain of vbabka@suse.cz designates 195.135.220.15 as permitted sender) smtp.mailfrom=vbabka@suse.cz X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id ECB79B020; Tue, 19 Feb 2019 14:18:15 +0000 (UTC) Subject: Re: [linux-stable-rc:linux-4.14.y 9470/9484] fs/proc/task_mmu.c:761:7: warning: 'last_vma' may be used uninitialized in this function To: kbuild test robot , Sandeep Patil Cc: kbuild-all@01.org, Greg Kroah-Hartman , "Joel Fernandes (Google)" , Andrew Morton , Linux Memory Management List References: <201902190440.gctrp6gs%fengguang.wu@intel.com> From: Vlastimil Babka Openpgp: preference=signencrypt Message-ID: <57a1aab3-1779-21ca-cbfe-52c357d4de32@suse.cz> Date: Tue, 19 Feb 2019 15:18:15 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <201902190440.gctrp6gs%fengguang.wu@intel.com> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit 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 2/18/19 9:01 PM, kbuild test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y > head: fea4e6b46436daf1982a367f638e3f5e0ae1bd3f > commit: 7c0e08d8ed3b8b6cf287007968d130f737256438 [9470/9484] mm: proc: smaps_rollup: fix pss_locked calculation > config: i386-randconfig-s1-02172359 (attached as .config) > compiler: gcc-6 (Debian 6.5.0-2) 6.5.0 20181026 > reproduce: > git checkout 7c0e08d8ed3b8b6cf287007968d130f737256438 > # save the attached .config to linux build tree > make ARCH=i386 > > Note: it may well be a FALSE warning. FWIW you are at least aware of it now. > http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings > > All warnings (new ones prefixed by >>): > > fs/proc/task_mmu.c: In function 'show_smap.isra.38': >>> fs/proc/task_mmu.c:761:7: warning: 'last_vma' may be used uninitialized in this function [-Wmaybe-uninitialized] > bool last_vma; > ^~~~~~~~ AFAICS false positive, and the commit in question doesn't touch that part.