Hi Andrew, It's probably a bug fix that unveils the link errors. tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git hugeext4/v5 head: db420786908155553b057eb4494cd8a111ba10bf commit: b59aa3626a9fb545266bd77329e172f7a8ecf15b [219/339] linux-next-rejects config: x86_64-randconfig-i0-201648 (attached as .config) compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4 reproduce: git checkout b59aa3626a9fb545266bd77329e172f7a8ecf15b # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): fs/built-in.o: In function `ext4_file_read_iter': >> file.c:(.text+0xa0f4a): undefined reference to `dax_iomap_rw' fs/built-in.o: In function `ext4_dax_fault': file.c:(.text+0xa1220): undefined reference to `dax_iomap_fault' fs/built-in.o: In function `ext4_file_write_iter': file.c:(.text+0xa13a6): undefined reference to `dax_iomap_rw' fs/built-in.o: In function `ext4_block_zero_page_range': >> inode.c:(.text+0xa7fa8): undefined reference to `iomap_zero_range' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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