DTIDE_NCHANNELS
for (i = 0; i < DTIDE_NCHANNELS; i++) {
struct ata_channel *sc_chp[DTIDE_NCHANNELS];/* pointers to sc_chan */
struct ata_channel sc_chan[DTIDE_NCHANNELS];
struct wdc_regs sc_wdc_regs[DTIDE_NCHANNELS];
sc->sc_wdc.sc_atac.atac_nchannels = DTIDE_NCHANNELS;