Fix the bug in lab3_result:vmm.c

labcodes_answer/lab3_result/kern/mm/vmm.c

@@ -419,6 +419,7 @@ do_pgfault(struct mm_struct *mm, uint32_t error_code, uintptr_t addr) {
             }    
             page_insert(mm->pgdir, page, addr, perm);
             swap_map_swappable(mm, addr, page, 1);
+            page->pra_vaddr = addr;
         }
         else {
             cprintf("no swap_init_ok but ptep is %x, failed\n",*ptep);