int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size,
struct vm_area_struct **res_vma, dma_addr_t *res_pa);
-int vb2_mmap_pfn_range(struct vm_area_struct *vma, unsigned long paddr,
- unsigned long size,
- const struct vm_operations_struct *vm_ops,
- void *priv);
-
struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma);
void vb2_put_vma(struct vm_area_struct *vma);