GDT_ENTRY_DEFAULT_USER32_CS 217 arch/x86/include/asm/segment.h #define __USER32_CS (GDT_ENTRY_DEFAULT_USER32_CS*8 + 3) GDT_ENTRY_DEFAULT_USER32_CS 127 arch/x86/kernel/cpu/common.c [GDT_ENTRY_DEFAULT_USER32_CS] = GDT_ENTRY_INIT(0xc0fb, 0, 0xfffff),