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Tue, 28 May 2024 21:32:58 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id jMu/KYpNVmbCTwAAD6G6ig (envelope-from ); Tue, 28 May 2024 21:32:58 +0000 Date: Tue, 28 May 2024 23:32:49 +0200 From: David Sterba To: kernel test robot Cc: Andrew Morton , Linux Memory Management List , amd-gfx@lists.freedesktop.org, bpf@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-btrfs@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mtd@lists.infradead.org, linux-pm@vger.kernel.org, netdev@vger.kernel.org, nouveau@lists.freedesktop.org Subject: Re: [linux-next:master] BUILD REGRESSION 6dc544b66971c7f9909ff038b62149105272d26a Message-ID: <20240528213249.GH8631@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <202405290242.YsJ4ENkU-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202405290242.YsJ4ENkU-lkp@intel.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) X-Stat-Signature: dk7oeo1gx8usn98q59ti3o5x5kodsknp X-Rspamd-Queue-Id: 9C4C1140006 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1716931980-12239 X-HE-Meta: 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 Z8I1ff0A 5L405G3kXWNoG5ENSTMz3um2zVqUypywIrTk4EnwwEZ6tauRSWjVgEKTLBKGPJEF3ir06ZvgVwt1UkfoM+ZCMVHIoVtmvLbXtqQM0Ya3v9VjJEO8xJ/IPKfktVrHhYYI/9n0mRqUm5qXtiNkPC/wEyDw5KbulOixUtKhn4KaWJNYOnMSz9iE4unIa2XUyS2n4IVmylcemg8PwmyIcN/zH1t6XvqXHBfXHQPdJb/EFiTPm1NptHr9Bntic/cwAqXOKjDm8jlO2MSGY6GoR1CJOeGXJO97OW4uttjW3DIjx0RBo9htke1Lu7hBdVpLDRlm33JxGMIItiLghx9XaCaCPAXnZYBv7oNiPR5NZrsUGy/cR+0Y= 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: List-Subscribe: List-Unsubscribe: On Wed, May 29, 2024 at 02:19:47AM +0800, kernel test robot wrote: > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > branch HEAD: 6dc544b66971c7f9909ff038b62149105272d26a Add linux-next specific files for 20240528 > > Error/Warning reports: > > https://lore.kernel.org/oe-kbuild-all/202405282036.maEDO54Q-lkp@intel.com > https://lore.kernel.org/oe-kbuild-all/202405282148.jaF0FLhu-lkp@intel.com > https://lore.kernel.org/oe-kbuild-all/202405282308.UEzt6hqC-lkp@intel.com > > Error/Warning: (recently discovered and may have been fixed) > > drivers/dma-buf/udmabuf.c:45:(.text+0x140): undefined reference to `vmf_insert_pfn' > fs/btrfs/fiemap.c:822:26: warning: 'last_extent_end' may be used uninitialized [-Wmaybe-uninitialized] The report says it's gcc 13.2, that one I use (and expect others as well as it's a recent one) and we also have -Wmaybe-uninitialized enabled in fs/btrfs/ to catch such warnings. Yet this is reported on mips64, is there something special about that compiler+architecture? The warning is IMO a false positive, the maybe-uninitialized variable is passed as pointer but initialized on success and never used on failure. We can safely silence the warning by initializing the variable to 0 but this may be pointing to a problem with mips64+gcc namely because other compiler+host combinations do not warn abou that.