15 struct mm_struct initial_mm = {0};  variable
233     initial_mm.pgd = (pml4t_t *)get_CR3();  in mm_init()
235     initial_mm.code_addr_start = memory_management_struct.kernel_code_start;  in mm_init()
236     initial_mm.code_addr_end = memory_management_struct.kernel_code_end;  in mm_init()
238     initial_mm.data_addr_start = (ul)&_data;  in mm_init()
239     initial_mm.data_addr_end = memory_management_struct.kernel_data_end;  in mm_init()
241     initial_mm.rodata_addr_start = (ul)&_rodata;  in mm_init()
242     initial_mm.rodata_addr_end = (ul)&_erodata;  in mm_init()
243     initial_mm.bss_start = (uint64_t)&_bss;  in mm_init()
244     initial_mm.bss_end = (uint64_t)&_ebss;  in mm_init()
246     initial_mm.brk_start = memory_management_struct.start_brk;  in mm_init()
247     initial_mm.brk_end = current_pcb->addr_limit;  in mm_init()
249     initial_mm.stack_start = _stack_start;  in mm_init()
250     initial_mm.vmas = NULL;  in mm_init()