radeonfb_cursor
static void radeonfb_cursor(void *, int, int, int);
ri->ri_ops.cursor = radeonfb_cursor;
struct radeonfb_cursor *nc = &dp->rd_tempcursor;
memcpy(nc, &dp->rd_cursor, sizeof(struct radeonfb_cursor));
memcpy(&dp->rd_cursor, nc, sizeof(struct radeonfb_cursor));
struct radeonfb_cursor rd_cursor, rd_tempcursor;