MVS_RSVD_SLOTS
mvi->rsvd_tags = bitmap_zalloc(MVS_RSVD_SLOTS, GFP_KERNEL);
can_queue -= MVS_RSVD_SLOTS;
if (tag >= MVS_RSVD_SLOTS)
index = find_first_zero_bit(bitmap, MVS_RSVD_SLOTS);
if (tag >= MVS_RSVD_SLOTS)
tag = rq->tag + MVS_RSVD_SLOTS;