ATTR_SYS           42 include/uapi/linux/msdos_fs.h #define ATTR_UNUSED	(ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
ATTR_SYS           44 include/uapi/linux/msdos_fs.h #define ATTR_EXT	(ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)