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b=BKATEM2iMldGUcvNDVS705355X2CnmCiHqjM7RX9s4OCamtymU5GXvT91NbVPo0I9 hl0LYGWA9qzds1bvDvQdspb0dPtkZ4ze5jMEAkOwIbeWDPIzhS8tGxixx/5AH0neBF plIHSLCvFwuEqBj+OJgqmKLIx1gfVlBv+bWR4V9M= Date: Tue, 22 Apr 2025 17:55:08 -0700 From: Andrew Morton To: Nathan Chancellor Cc: Mark Tinguely , llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, kernel test robot , Linux Memory Management List , "Matthew Wilcox (Oracle)" , Joseph Qi Subject: Re: [akpm-mm:mm-nonmm-unstable 66/67] fs/ocfs2/aops.c:1133:17: warning: variable 'i' is uninitialized when used here Message-Id: <20250422175508.cbb4875faacbda05e6c68cfd@linux-foundation.org> In-Reply-To: <20250422201241.GA3761951@ax162> References: <202504190950.rq1NDlDz-lkp@intel.com> <20250422201241.GA3761951@ax162> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E2EEE140003 X-Stat-Signature: rshgsy9w1hcjkkgrkmwmgqkter71473y X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1745369710-964298 X-HE-Meta: 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 0GBSU6XK /8lv6DIUJbNHh5TywNtalBAaHqFQ73G4NvQbCLBkP3sOaAhytW62eikG+VOCmLZzzFEdHvmRUgbia/J7xJ3XSleva/Qc8O1mqSFb8YVzrgqGcsl4r+7mddUJhYG8g/28WGHifRBobGSZPklumIRE7ApBJECOIFXG3w20dAGmCodQdP11yKuLN7CivQXNUECJThfHpNghg7Lqj2Cs+KyvIsq2N/nwxghsMfe48ryswBJDZc4ltEgRGRuMoApcv1q84na3WpHmTxVkBLdiodXXU6nhMZG5W+hlad+fsrUTd84PyNXErQp5MOYp8aF3u+wSUgv9UTO7VdXW5gpxRCOrWy1yByZVbvVmhPyrJyDK+ZvQG8yI3RBnVjXemt/Vi4a+zIuRjVqxK9VclxvDXyz5beRf9UQ== 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 Tue, 22 Apr 2025 13:12:41 -0700 Nathan Chancellor wrote: > Hi Andrew, > > On Sat, Apr 19, 2025 at 09:21:13AM +0800, kernel test robot wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable > > head: d1a9b961293d30be9a865d8685590635db282957 > > commit: 89e3e963129e945e0333e474709bde627b6a9cee [66/67] ocfs2: fix panic in failed foilio allocation > > config: s390-randconfig-001-20250419 (https://download.01.org/0day-ci/archive/20250419/202504190950.rq1NDlDz-lkp@intel.com/config) > > compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8) > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250419/202504190950.rq1NDlDz-lkp@intel.com/reproduce) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > the same patch/commit), kindly add following tags > > | Reported-by: kernel test robot > > | Closes: https://lore.kernel.org/oe-kbuild-all/202504190950.rq1NDlDz-lkp@intel.com/ > > > > All warnings (new ones prefixed by >>): > > > > >> fs/ocfs2/aops.c:1133:17: warning: variable 'i' is uninitialized when used here [-Wuninitialized] > > 1133 | wc->w_folios[i] = NULL; > > | ^ > > fs/ocfs2/aops.c:1101:12: note: initialize the variable 'i' to silence this warning > > 1101 | int ret, i; > > | ^ > > | = 0 > > There appears to be something funky going on with "ocfs2: fix panic in > failed foilio allocation" in your tree, perhaps as a result of applying > v2 to mm-nonmm-unstable and v1 to mm-hotfixes-unstable? If you compare > https://git.kernel.org/akpm/mm/c/392a664f6d2740eeae23df0d29b56f444f558a7c > to https://lore.kernel.org/c879a52b-835c-4fa0-902b-8b2e9196dcbd@oracle.com/, > the second hunks do not match, which is what this is warning about. I > see this same warning in next-20250422. Thanks. Confirms that the universe is a plot to confuse akpm. I dropped everything and remerged the v2 patch.