Hi Tahsin, [auto build test ERROR on ext4/dev] [also build test ERROR on next-20170531] [cannot apply to v4.12-rc3] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Tahsin-Erdogan/ext4-xattr-in-inode-support/20170531-214310 base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev config: i386-defconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): fs/built-in.o: In function `ext4_xattr_inode_get': >> xattr.c:(.text+0xb8818): undefined reference to `crc32c' fs/built-in.o: In function `ext4_xattr_set_entry': xattr.c:(.text+0xb9614): undefined reference to `crc32c' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation