scsi: sd: Warn if unsupported ZBC device is probed

In sd_probe(), print a warning if CONFIG_BLK_DEV_ZONED is disabled and a
TYPE_ZBC device is found. While at it, use IS_ENABLED() to test if
CONFIG_BLK_DEV_ZONED is enabled instead using of a #ifdef.

Link: https://lore.kernel.org/r/20210128055658.530133-1-damien.lemoal@wdc.com
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/sd.c

@@ -3379,10 +3379,12 @@ static int sd_probe(struct device *dev)
 	    sdp->type != TYPE_RBC)
 		goto out;
 
-#ifndef CONFIG_BLK_DEV_ZONED
-	if (sdp->type == TYPE_ZBC)
+	if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED) && sdp->type == TYPE_ZBC) {
+		sdev_printk(KERN_WARNING, sdp,
+			    "Unsupported ZBC host-managed device.\n");
 		goto out;
-#endif
+	}
+
 	SCSI_LOG_HLQUEUE(3, sdev_printk(KERN_INFO, sdp,
 					"sd_probe\n"));