[PATCH] SCSI sysfs host name support

OK, let's export the proc_name then. It's some name that can be used
to identify the driver, works for code both compiled statically or
as module, is reasonably short and very often resembles the module
name.

For the module_name, let's wait for a generic sysfs solution.

drivers/scsi/scsi_sysfs.c

@@ -58,21 +58,24 @@ static int scsi_scan(struct Scsi_Host *shost, const char *str)
  * shost_show_function: macro to create an attr function that can be used to
  * show a non-bit field.
  */
-#define shost_show_function(field, format_string)			\
+#define shost_show_function(name, field, format_string)			\
 static ssize_t								\
-show_##field (struct class_device *class_dev, char *buf)		\
+show_##name (struct class_device *class_dev, char *buf)			\
 {									\
 	struct Scsi_Host *shost = class_to_shost(class_dev);		\
-	return snprintf (buf, 20, format_string, shost->field);	\
+	return snprintf (buf, 20, format_string, shost->field);		\
 }
 
 /*
  * shost_rd_attr: macro to create a function and attribute variable for a
  * read only field.
  */
-#define shost_rd_attr(field, format_string)				\
-	shost_show_function(field, format_string)			\
-static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL)
+#define shost_rd_attr2(name, field, format_string)			\
+	shost_show_function(name, field, format_string)			\
+static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
+
+#define shost_rd_attr(field, format_string) \
+shost_rd_attr2(field, field, format_string)
 
 /*
  * Create the actual show/store functions and data structures.
@@ -96,6 +99,7 @@ shost_rd_attr(host_busy, "%hu\n");
 shost_rd_attr(cmd_per_lun, "%hd\n");
 shost_rd_attr(sg_tablesize, "%hu\n");
 shost_rd_attr(unchecked_isa_dma, "%d\n");
+shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
 
 static struct class_device_attribute *scsi_sysfs_shost_attrs[] = {
 	&class_device_attr_unique_id,
@@ -103,6 +107,7 @@ static struct class_device_attribute *scsi_sysfs_shost_attrs[] = {
 	&class_device_attr_cmd_per_lun,
 	&class_device_attr_sg_tablesize,
 	&class_device_attr_unchecked_isa_dma,
+	&class_device_attr_proc_name,
 	&class_device_attr_scan,
 	NULL
 };