MAXGDT_LIMIT
#define MAXGDT_COUNT (MAXGDT_LIMIT / sizeof(struct user_segment_descriptor))
r_gdt.rd_limit = MAXGDT_LIMIT - 1;
r_gdt.rd_limit = MAXGDT_LIMIT - 1;
kmem_alloc3(kernel_map, MAXGDT_LIMIT, VM_SUBSYS_GD,
bzero(gd->gd_gdt, MAXGDT_LIMIT);
MAXGDT_LIMIT);