__USER_DS           8 include/asm-m32r/segment.h #define __USER_DS	0x2B
__USER_DS           8 include/asm-m68k/segment.h #define __USER_DS     (USER_DATA)
__USER_DS         180 include/asm-x86/segment.h #define __USER_DS     (GDT_ENTRY_DEFAULT_USER_DS* 8 + 3)