Hi Sven, I love your patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on linus/master v5.8-rc2 next-20200623] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Sven-Van-Asbroeck/address-romfs-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5e857ce6eae7ca21b2055cca4885545e29228fe2 config: i386-randconfig-r015-20200623 (attached as .config) compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: fs/romfs/super.o: in function `romfs_largest_blocksize': vim +505 fs/romfs/super.c 494 495 /* 496 * pick the largest blocksize which the underlying block device 497 * is a multiple of. Or fall back to legacy (ROMBSIZE). 498 */ 499 static int romfs_largest_blocksize(struct super_block *sb) 500 { 501 loff_t device_sz = i_size_read(sb->s_bdev->bd_inode); 502 int blksz; 503 504 for (blksz = PAGE_SIZE; blksz > ROMBSIZE; blksz >>= 1) 506 break; 507 508 return blksz; 509 } 510 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org