GDT_ENTRY_KERNEL_DS
#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS*8)
#define __KERNEL_DS (GDT_ENTRY_KERNEL_DS*8)
[GDT_ENTRY_KERNEL_DS] = GDT_ENTRY_INIT(DESC_DATA64, 0, 0xfffff),
[GDT_ENTRY_KERNEL_DS] = GDT_ENTRY_INIT(DESC_DATA32, 0, 0xfffff),