BUG_ON(index > SG_MEMPOOL_NR);
BUG_ON(index >= SG_MEMPOOL_NR);
static void scsi_free_sgtable(struct scatterlist *sgl, int index){	struct scsi_host_sg_pool *sgp;	BUG_ON(index > SG_MEMPOOL_NR);	sgp = scsi_sg_pools + index;	mempool_free(sgl, sgp->pool);}