From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A058728E2; Mon, 6 Feb 2023 08:20:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675671654; x=1707207654; h=date:from:to:cc:subject:message-id:mime-version; bh=K9p3OLOAhx0vJ3KftHQjv5WIDLvfl7vh3EE3KbEG6T4=; b=Z5Ukn/BDm3AuXNogwD1ne3hwj2QfDA4UmFYO1+TfQ2IuUbXUM5RtiZQe wXll09wl+dXJtUHlLJOilDOfo82agPSTCI3qErgltKyH3nH0OKVg9Sg45 AuOZ0Vceosn9BLqyPNIAav3jTeCZXjhPwfBhFG1WurY4wx+QvYKvSDEzT SEpVDudQXba4y+WdrjOV2CsXUNEjxuN+rtVYwLBykpgnCUBD0TPD2Owpj GbCf5FWKzWg4OmnPwGvLnm1bQKAC63M5g+zLyVzgItsd7TPuAIFYeaR6K XTp9kcUPO+wQw/hhXTHkZBZp2+Ey1wuVdgaplTKSUPueOoWO+cVOyVnRF Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="415374647" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="415374647" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2023 00:20:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="643929836" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="643929836" Received: from lkp-server01.sh.intel.com (HELO 4455601a8d94) ([10.239.97.150]) by orsmga006.jf.intel.com with ESMTP; 06 Feb 2023 00:20:52 -0800 Received: from kbuild by 4455601a8d94 with local (Exim 4.96) (envelope-from ) id 1pOwk7-0002SG-2D; Mon, 06 Feb 2023 08:20:51 +0000 Date: Mon, 6 Feb 2023 16:20:13 +0800 From: kernel test robot To: Chandan Babu R Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev Subject: [chandanr:dio-inode-completion-chain 1/1] fs/xfs/xfs_aops.c:186:8: warning: variable 'nr_entries' set but not used Message-ID: <202302061659.0AclcU4i-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://github.com/chandanr/linux dio-inode-completion-chain head: 5f08e3ed4dcab37394794c13e3b79402ca05f3ca commit: 5f08e3ed4dcab37394794c13e3b79402ca05f3ca [1/1] changes config: hexagon-randconfig-r004-20230205 (https://download.01.org/0day-ci/archive/20230206/202302061659.0AclcU4i-lkp@intel.com/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/chandanr/linux/commit/5f08e3ed4dcab37394794c13e3b79402ca05f3ca git remote add chandanr https://github.com/chandanr/linux git fetch --no-tags chandanr dio-inode-completion-chain git checkout 5f08e3ed4dcab37394794c13e3b79402ca05f3ca # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash fs/xfs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from fs/xfs/xfs_aops.c:7: In file included from fs/xfs/xfs.h:22: In file included from fs/xfs/xfs_linux.h:31: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from fs/xfs/xfs_aops.c:7: In file included from fs/xfs/xfs.h:22: In file included from fs/xfs/xfs_linux.h:31: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from fs/xfs/xfs_aops.c:7: In file included from fs/xfs/xfs.h:22: In file included from fs/xfs/xfs_linux.h:31: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ fs/xfs/xfs_aops.c:177:21: warning: unknown attribute 'optimize' ignored [-Wunknown-attributes] void __attribute__((optimize("O0"))) ^~~~~~~~~~~~~~ >> fs/xfs/xfs_aops.c:186:8: warning: variable 'nr_entries' set but not used [-Wunused-but-set-variable] int nr_entries = 0; ^ 8 warnings generated. vim +/nr_entries +186 fs/xfs/xfs_aops.c 176 177 void __attribute__((optimize("O0"))) 178 xfs_end_dio( 179 struct work_struct *work) 180 { 181 struct xfs_inode *ip = 182 container_of(work, struct xfs_inode, i_dio_work); 183 struct iomap_dio *dio; 184 struct list_head tmp; 185 unsigned long flags; > 186 int nr_entries = 0; 187 188 spin_lock_irqsave(&ip->i_dio_lock, flags); 189 list_replace_init(&ip->i_dio_list, &tmp); 190 spin_unlock_irqrestore(&ip->i_dio_lock, flags); 191 192 /* chandan: do we have to sort dios? */ 193 while ((dio = list_first_entry_or_null(&tmp, struct iomap_dio, 194 dio_list))) { 195 struct kiocb *iocb = dio->iocb; 196 197 ++nr_entries; 198 list_del_init(&dio->dio_list); 199 iocb->ki_complete(iocb, iomap_dio_complete(dio)); 200 } 201 202 return; 203 } 204 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests