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X-CSE-ConnectionGUID: s5mwefKuTISt+YIu5ap2jA== X-CSE-MsgGUID: hHbspEGlQ/6CU7zLEcZQog== X-IronPort-AV: E=McAfee;i="6800,10657,11774"; a="77830718" X-IronPort-AV: E=Sophos;i="6.23,212,1770624000"; d="scan'208";a="77830718" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 May 2026 09:44:06 -0700 X-CSE-ConnectionGUID: uuUuqTX3SL2RFZFOSAmWQA== X-CSE-MsgGUID: 7q86Um4DQDuwLWHVyIpQ2w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,212,1770624000"; d="scan'208";a="258477514" Received: from igk-lkp-server01.igk.intel.com (HELO bdf09bfdbd5f) ([10.211.93.152]) by fmviesa002.fm.intel.com with ESMTP; 02 May 2026 09:44:04 -0700 Received: from kbuild by bdf09bfdbd5f with local (Exim 4.98.2) (envelope-from ) id 1wJDRi-000000005Iv-1zRd; Sat, 02 May 2026 16:44:02 +0000 Date: Sat, 02 May 2026 18:43:29 +0200 From: kernel test robot To: David Howells Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev Subject: [dhowells-fs:netfs-next 46/50] fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true Message-ID: <202605021801.7vqkz933-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-next head: 2c55c7cf98847d593219ef29d3fedfd551d6f55f commit: e192187e9d3cdb786b7b6aeb6fc6d4048a806004 [46/50] netfs: Combine prepare and issue ops and grab the buffers on request config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260502/202605021801.7vqkz933-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260502/202605021801.7vqkz933-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/202605021801.7vqkz933-lkp@intel.com/ All warnings (new ones prefixed by >>): >> fs/9p/vfs_addr.c:79:6: warning: variable 'len' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] 79 | if (err < 0) | ^~~~~~~ fs/9p/vfs_addr.c:90:51: note: uninitialized use occurs here 90 | return netfs_write_subrequest_terminated(subreq, len ?: err); | ^~~ fs/9p/vfs_addr.c:79:2: note: remove the 'if' if its condition is always false 79 | if (err < 0) | ^~~~~~~~~~~~ 80 | goto term; | ~~~~~~~~~ fs/9p/vfs_addr.c:74:14: note: initialize the variable 'len' to silence this warning 74 | int err, len; | ^ | = 0 1 warning generated. -- >> fs/netfs/write_collect.c:155:7: warning: variable 'fpos' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] 155 | if (!bvecq->bv[slot].bv_page) { | ^~~~~~~~~~~~~~~~~~~~~~~~ fs/netfs/write_collect.c:187:7: note: uninitialized use occurs here 187 | if (fpos + fsize >= collected_to) | ^~~~ fs/netfs/write_collect.c:155:3: note: remove the 'if' if its condition is always false 155 | if (!bvecq->bv[slot].bv_page) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 156 | WARN_ONCE(1, "R=%08x slot already cleared?\n", wreq->debug_id); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 157 | fsize = bvecq->bv[slot].bv_len; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 158 | goto skip; | ~~~~~~~~~~ 159 | } | ~ fs/netfs/write_collect.c:137:26: note: initialize the variable 'fpos' to silence this warning 137 | unsigned long long fpos, fend; | ^ | = 0 1 warning generated. vim +79 fs/9p/vfs_addr.c 66 67 /* 68 * Issue a subrequest to write to the server. 69 */ 70 static void v9fs_issue_write(struct netfs_io_subrequest *subreq) 71 { 72 struct iov_iter iter; 73 struct p9_fid *fid = subreq->rreq->netfs_priv; 74 int err, len; 75 76 subreq->len = umin(subreq->len, fid->clnt->msize - P9_IOHDRSZ); 77 78 err = netfs_prepare_write_buffer(subreq, INT_MAX); > 79 if (err < 0) 80 goto term; 81 82 iov_iter_bvec_queue(&iter, ITER_SOURCE, subreq->content.bvecq, 83 subreq->content.slot, subreq->content.offset, subreq->len); 84 85 len = p9_client_write(fid, subreq->start, &iter, &err); 86 if (len > 0) 87 __set_bit(NETFS_SREQ_MADE_PROGRESS, &subreq->flags); 88 89 term: 90 return netfs_write_subrequest_terminated(subreq, len ?: err); 91 } 92 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki