KREF: make kref_get() return void as it makes sense to do so.

Thanks to Kiran for bugging me to do this.
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/scsi/sd.c

@@ -180,8 +180,7 @@ static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
 	if (disk->private_data == NULL)
 		goto out;
 	sdkp = scsi_disk(disk);
-	if (!kref_get(&sdkp->kref))
-		goto out_sdkp;
+	kref_get(&sdkp->kref);
 	if (scsi_device_get(sdkp->device))
 		goto out_put;
 	up(&sd_ref_sem);
@@ -189,7 +188,6 @@ static struct scsi_disk *scsi_disk_get(struct gendisk *disk)
 
  out_put:
 	kref_put(&sdkp->kref, scsi_disk_release);
- out_sdkp:
 	sdkp = NULL;
  out:
 	up(&sd_ref_sem);

drivers/scsi/sr.c

@@ -140,15 +140,13 @@ static inline struct scsi_cd *scsi_cd_get(struct gendisk *disk)
 	if (disk->private_data == NULL)
 		goto out;
 	cd = scsi_cd(disk);
-	if (!kref_get(&cd->kref))
-		goto out_null;
+	kref_get(&cd->kref);
 	if (scsi_device_get(cd->device))
 		goto out_put;
 	goto out;
 
  out_put:
 	kref_put(&cd->kref, sr_kref_release);
- out_null:
 	cd = NULL;
  out:
 	up(&sr_ref_sem);

include/linux/kref.h

@@ -23,7 +23,7 @@ struct kref {
 };
 
 void kref_init(struct kref *kref);
-struct kref *kref_get(struct kref *kref);
+void kref_get(struct kref *kref);
 void kref_put(struct kref *kref, void (*release) (struct kref *kref));
 
 #endif /* _KREF_H_ */

lib/kref.c

@@ -27,11 +27,10 @@ void kref_init(struct kref *kref)
  * kref_get - increment refcount for object.
  * @kref: object.
  */
-struct kref *kref_get(struct kref *kref)
+void kref_get(struct kref *kref)
 {
 	WARN_ON(!atomic_read(&kref->refcount));
 	atomic_inc(&kref->refcount);
-	return kref;
 }
 
 /**