Convert simple loops over superblocks to list_for_each_entry_safe

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/super.c b/fs/super.c
index ba99524..ccb2b5f 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -395,11 +395,10 @@
  */
 void sync_supers(void)
 {
-	struct super_block *sb;
+	struct super_block *sb, *n;
 
 	spin_lock(&sb_lock);
-restart:
-	list_for_each_entry(sb, &super_blocks, s_list) {
+	list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
 		if (list_empty(&sb->s_instances))
 			continue;
 		if (sb->s_op->write_super && sb->s_dirt) {
@@ -412,8 +411,7 @@
 			up_read(&sb->s_umount);
 
 			spin_lock(&sb_lock);
-			if (__put_super_and_need_restart(sb))
-				goto restart;
+			__put_super(sb);
 		}
 	}
 	spin_unlock(&sb_lock);