tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 5a399b91821faeec2466751db2d714b24f8eb17c commit: 7b208222f6845875c568d238aeb9db17a1c63d96 [1941/1941] ext4: avoid deadlock in fs reclaim with page writeback config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251214/202512140847.r9ez9W5V-lkp@i...) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512140847.r9ez9W5V-lkp@i...) 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 <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512140847.r9ez9W5V-lkp@intel.com/ All warnings (new ones prefixed by >>): fs/ext4/inode.c: In function 'ext4_dax_writepages':
fs/ext4/inode.c:2995:30: warning: unused variable 'sbi' [-Wunused-variable] 2995 | struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb); | ^~~
vim +/sbi +2995 fs/ext4/inode.c 64769240bd07f4 Alex Tomas 2008-07-11 2988 5f0663bb4a64f5 Dan Williams 2017-12-21 2989 static int ext4_dax_writepages(struct address_space *mapping, 5f0663bb4a64f5 Dan Williams 2017-12-21 2990 struct writeback_control *wbc) 5f0663bb4a64f5 Dan Williams 2017-12-21 2991 { 5f0663bb4a64f5 Dan Williams 2017-12-21 2992 int ret; 5f0663bb4a64f5 Dan Williams 2017-12-21 2993 long nr_to_write = wbc->nr_to_write; 5f0663bb4a64f5 Dan Williams 2017-12-21 2994 struct inode *inode = mapping->host; 5f0663bb4a64f5 Dan Williams 2017-12-21 @2995 struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb); 7b208222f68458 Jan Kara 2024-06-11 2996 int alloc_ctx; 5f0663bb4a64f5 Dan Williams 2017-12-21 2997 5f0663bb4a64f5 Dan Williams 2017-12-21 2998 if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5f0663bb4a64f5 Dan Williams 2017-12-21 2999 return -EIO; 5f0663bb4a64f5 Dan Williams 2017-12-21 3000 7b208222f68458 Jan Kara 2024-06-11 3001 alloc_ctx = ext4_writepages_down_read(inode->i_sb); 5f0663bb4a64f5 Dan Williams 2017-12-21 3002 trace_ext4_writepages(inode, wbc); 5f0663bb4a64f5 Dan Williams 2017-12-21 3003 5f0663bb4a64f5 Dan Williams 2017-12-21 3004 ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, wbc); 5f0663bb4a64f5 Dan Williams 2017-12-21 3005 trace_ext4_writepages_result(inode, wbc, ret, 5f0663bb4a64f5 Dan Williams 2017-12-21 3006 nr_to_write - wbc->nr_to_write); 7b208222f68458 Jan Kara 2024-06-11 3007 ext4_writepages_up_read(inode->i_sb, alloc_ctx); 5f0663bb4a64f5 Dan Williams 2017-12-21 3008 return ret; 5f0663bb4a64f5 Dan Williams 2017-12-21 3009 } 5f0663bb4a64f5 Dan Williams 2017-12-21 3010 :::::: The code at line 2995 was first introduced by commit :::::: 5f0663bb4a64f588f0a2dd6d1be68d40f9af0086 ext4, dax: introduce ext4_dax_aops :::::: TO: Dan Williams <dan.j.williams@intel.com> :::::: CC: Dan Williams <dan.j.williams@intel.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki