md: rename md_free to md_kobj_release

The md_free name is rather misleading, so pick a better one.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/md.c

@@ -5589,7 +5589,7 @@ md_attr_store(struct kobject *kobj, struct attribute *attr,
 	return rv;
 }
 
-static void md_free(struct kobject *ko)
+static void md_kobj_release(struct kobject *ko)
 {
 	struct mddev *mddev = container_of(ko, struct mddev, kobj);
 
@@ -5607,7 +5607,7 @@ static const struct sysfs_ops md_sysfs_ops = {
 	.store	= md_attr_store,
 };
 static struct kobj_type md_ktype = {
-	.release	= md_free,
+	.release	= md_kobj_release,
 	.sysfs_ops	= &md_sysfs_ops,
 	.default_groups	= md_attr_groups,
 };