CIRCULAR_BUF_INC_IDX  313 samples/vfio-mdev/mtty.c 			CIRCULAR_BUF_INC_IDX(mdev_state->s[index].rxtx.head);
CIRCULAR_BUF_INC_IDX  478 samples/vfio-mdev/mtty.c 			CIRCULAR_BUF_INC_IDX(mdev_state->s[index].rxtx.tail);