zap_vma_ptes
int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
zap_vma_ptes(vma, start_addr,
zap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);
zap_vma_ptes(vma, vma->vm_start,