ib_umem_odp_map_dma_and_lock
EXPORT_SYMBOL(ib_umem_odp_map_dma_and_lock);
np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, fault);
np = ib_umem_odp_map_dma_and_lock(umem_odp, user_va, bcnt,
int ib_umem_odp_map_dma_and_lock(struct ib_umem_odp *umem_odp, u64 start_offset,