memset(probe_ent, 0, sizeof(*probe_ent));
ata_probe_ent_alloc(struct device *dev, const struct ata_port_info *port){	struct ata_probe_ent *probe_ent;	probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);	if (!probe_ent) {		printk(KERN_ERR DRV_NAME "(%s): out of memory\n",		       kobject_name(&(dev->kobj)));		return NULL;	}	memset(probe_ent, 0, sizeof(*probe_ent));	INIT_LIST_HEAD(&probe_ent->node);	probe_ent->dev = dev;	probe_ent->sht = port->sht;	probe_ent->host_flags = port->host_flags;	probe_ent->pio_mask = port->pio_mask;	probe_ent->mwdma_mask = port->mwdma_mask;	probe_ent->udma_mask = port->udma_mask;	probe_ent->port_ops = port->port_ops;	return probe_ent;}