scsi: LLDD dynamic scan aids

From: 	James.Smart@Emulex.Com

With rejection fixes around the removal of scsi_syms.c
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_scan.c

@@ -1230,6 +1230,7 @@ int scsi_scan_host_selected(struct Scsi_Host *shost, unsigned int channel,
 
 	return 0;
 }
+EXPORT_SYMBOL(scsi_scan_host_selected);
 
 /**
  * scsi_scan_host - scan the given adapter
@@ -1242,6 +1243,18 @@ void scsi_scan_host(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(scsi_scan_host);
 
+/**
+ * scsi_scan_single_target - scan the given SCSI target
+ * @shost:         adapter to scan
+ * @chan:          channel to scan
+ * @id:            target id to scan
+ **/
+void scsi_scan_single_target(struct Scsi_Host *shost, 
+	unsigned int chan, unsigned int id)
+{
+	scsi_scan_host_selected(shost, chan, id, SCAN_WILD_CARD, 1);
+}
+
 void scsi_forget_host(struct Scsi_Host *shost)
 {
 	struct scsi_device *sdev, *tmp;

include/scsi/scsi_host.h

@@ -527,6 +527,9 @@ struct Scsi_Host {
 extern struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *, int);
 extern int __must_check scsi_add_host(struct Scsi_Host *, struct device *);
 extern void scsi_scan_host(struct Scsi_Host *);
+extern void scsi_scan_single_target(struct Scsi_Host *, unsigned int,
+	unsigned int);
+extern void scsi_rescan_device(struct device *);
 extern void scsi_remove_host(struct Scsi_Host *);
 extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
 extern void scsi_host_put(struct Scsi_Host *t);