Hi Nikolay, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: cbbc4774e41c354f5b0f9fc7a9be442fcee74b3f commit: c5bcfc0da15495ae5441f91a2572559e7e44142c [8969/23560] btrfs: Remove extent_io_ops::fill_delalloc config: x86_64-buildonly-randconfig-004-20240825 (https://download.01.org/0day-ci/archive/20240827/202408270310.2w8xfOVc-lkp@i...) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240827/202408270310.2w8xfOVc-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/202408270310.2w8xfOVc-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/btrfs/inode.c:8: In file included from include/linux/buffer_head.h:14: include/linux/pagemap.h:401:21: warning: cast from 'int (*)(struct file *, struct page *)' to 'filler_t *' (aka 'int (*)(void *, struct page *)') converts to incompatible function type [-Wcast-function-type-strict] 401 | filler_t *filler = (filler_t *)mapping->a_ops->readpage; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/btrfs/inode.c:2776:16: warning: variable 'inode' set but not used [-Wunused-but-set-variable] 2776 | struct inode *inode; | ^ fs/btrfs/inode.c:6727:6: warning: variable 'drop_on_err' set but not used [-Wunused-but-set-variable] 6727 | int drop_on_err = 0; | ^ 3 warnings generated.

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fs/btrfs/.tmp_inode.o: warning: objtool: run_delalloc_nocow()+0x62c: unreachable instruction

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