1 files changed, 2 insertions, 0 deletions

diff --git a/fs/buffer.c b/fs/buffer.c
index c9c266db0624..021ec4da9932 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -568,6 +568,8 @@ static void do_thaw_all(struct work_struct *work)
         spin_lock(&sb_lock);
 restart:
         list_for_each_entry(sb, &super_blocks, s_list) {
+                if (list_empty(&sb->s_instances))
+                        continue;
                 sb->s_count++;
                 spin_unlock(&sb_lock);
                 down_read(&sb->s_umount);