GUS_BUFFER_MULTIPLE
if ((blocksize % GUS_BUFFER_MULTIPLE) != 0)
blocksize = (blocksize / GUS_BUFFER_MULTIPLE + 1) *
GUS_BUFFER_MULTIPLE;
gus_round_blocksize(sc, GUS_BUFFER_MULTIPLE); /* default blksiz */
int gus_bufcnt[GUS_MEM_FOR_BUFFERS / GUS_BUFFER_MULTIPLE];