dma_map_single    615 include/linux/dma-mapping.h #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)
dma_map_single     26 tools/virtio/linux/dma-mapping.h #define dma_map_single(d, p, s, dir) (virt_to_phys(p))