staticint xxx_mmp(struct file *filp, struct vm_area_struct *vma)
{
    if(remap_pfn_range(vma, vma->vm_start, vm->vm_pgoff, vma->vm_end - vma->start, vma->vm_page_prot))   //建立頁表return - EAGAIN;
    vma->vm_ops = &xxx_remap_vm_ops;
    xxx_vma_open(vma);
    return 0;
}
void xxx_vma_open(
 
struct vm_area_struct *vma) //VMA開啟函式
{
  ...
  printk(KERN_NOTICE "xxx VMA open, virt %lx, phys %1x\n",vma->vm_start, vma->vm_pgoff 《PAGE_SHIFT);
}
void xxx_vma_close(struct vm_area_struct *vma)  //VMA關閉函式
{
  ...
  printk(KERN_NOTICE "xxx VMA close. \n");
}
staticstruct vm_operation_struct xxx_remap_vm_ops = 
 
//VM操作結構體
{
   .open=xxx_vma_open,
   .close=xxx_vma_close,
   ...
}