Fix the bug in lab8_result:vmm.c

labcodes_answer/lab8_result/kern/mm/vmm.c

@@ -536,6 +536,7 @@ 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;
    }
    ret = 0;
 failed: