322     int retval = 0;  in mm_create_vma()  local
335     retval = vma_insert(mm, vma);  in mm_create_vma()
336     if (retval == -EEXIST || retval == __VMA_MERGED) // 之前已经存在了相同的vma，直接返回  in mm_create_vma()
340         if (retval == -EEXIST)  in mm_create_vma()
362    int retval = 0;  in mm_map_vma()  local
412 …retval = mm_map_proc_page_table((uint64_t)vma->vm_mm->pgd, true, vma->vm_start + offset, paddr, le…  in mm_map_vma()
413         if (unlikely(retval != 0))  in mm_map_vma()
431 …retval = mm_map_proc_page_table((uint64_t)vma->vm_mm->pgd, true, vma->vm_start + offset + mapped, …  in mm_map_vma()
433         if (unlikely(retval != 0))  in mm_map_vma()
447 …retval = mm_map_proc_page_table((uint64_t)vma->vm_mm->pgd, true, vma->vm_start + offset + mapped, …  in mm_map_vma()
449         if (unlikely(retval != 0))  in mm_map_vma()
461     return retval;  in mm_map_vma()
475     int retval = 0;  in mm_map()  local
496         retval = mm_map_vma(vma, paddr + mapped, offset, m_len);  in mm_map()
497         if (unlikely(retval != 0))  in mm_map()
505     return retval;  in mm_map()
552     int retval = 0;  in mm_unmap()  local
581     return retval;  in mm_unmap()