vma_adjust_trans_huge
void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start,
vma_adjust_trans_huge(vma, start, end, NULL);
vma_adjust_trans_huge(vma, vma->vm_start, addr, NULL);
vma_adjust_trans_huge(vma, vmg->start, vmg->end,