On Fri, Aug 04, 2023 at 01:34:01AM +0800, kernel test robot wrote: > arm-linux-gnueabi-ld: storage.c:(.text+0x27c): undefined reference to `__brelse' > arm-linux-gnueabi-ld: storage.c:(.text+0x9c): undefined reference to `__bread_gfp' > storage.c:(.text+0x22c): undefined reference to `__bread_gfp' > storage.c:(.text+0x64): undefined reference to `__brelse' I think something like this would fix it. Jens? Christoph? +++ b/fs/romfs/Kconfig @@ -2,6 +2,7 @@ config ROMFS_FS tristate "ROM file system support" depends on BLOCK || MTD + select BUFFER_HEAD help This is a very small read-only file system mainly intended for initial ram disks of installation disks, but it could be used for romfs has a few options and I spent no time looking at this closely; maybe not every version of romfs needs buffer heads.