Hi Jan, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 5d5f0e49572a1948fa42fd082aaa8238757614bd [1334/1334] ext4: Check journal inode extents more carefully config: x86_64-randconfig-102-20241218 (https://download.01.org/0day-ci/archive/20241220/202412202311.0ETgmhXR-lkp@i...) compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412202311.0ETgmhXR-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/202412202311.0ETgmhXR-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/ext4/inode.c:25: include/linux/pagemap.h:425:21: 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] 425 | filler_t *filler = (filler_t *)mapping->a_ops->readpage; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated.

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fs/ext4/inode.o: warning: objtool: ext4_map_blocks()+0x9ea: unreachable instruction

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