[PATCH] Block: move struct disk_attribute to genhd.h

This allows other block devices to add attributes to their sysfs
entries.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/block/aoe/aoeblk.c

@@ -12,14 +12,7 @@
 #include <linux/netdevice.h>
 #include "aoe.h"
 
-/* add attributes for our block devices in sysfs
- * (see drivers/block/genhd.c:disk_attr_show, etc.)
- */
-struct disk_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct gendisk *, char *);
-};
-
+/* add attributes for our block devices in sysfs */
 static ssize_t aoedisk_show_state(struct gendisk * disk, char *page)
 {
 	struct aoedev *d = disk->private_data;

drivers/block/genhd.c

@@ -315,12 +315,6 @@ subsys_initcall(device_init);
 /*
  * kobject & sysfs bindings for block devices
  */
-
-struct disk_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct gendisk *, char *);
-};
-
 static ssize_t disk_attr_show(struct kobject *kobj, struct attribute *attr,
 			      char *page)
 {

include/linux/genhd.h

@@ -128,6 +128,12 @@ struct gendisk {
 #endif
 };
 
+/* Structure for sysfs attributes on block devices */
+struct disk_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct gendisk *, char *);
+};
+
 /* 
  * Macros to operate on percpu disk statistics:
  *