diff --git a/[refs] b/[refs]
index e64bf2ddf780..dd39e4575518 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5d5e103a70f74ae98e3965a4add1ab951d0651d1
+refs/heads/master: 86df7eb921a009515285e7171363fa57dd2d7d31
diff --git a/trunk/fs/btrfs/tree-log.c b/trunk/fs/btrfs/tree-log.c
index 4aff766d171a..f51bf13125c0 100644
--- a/trunk/fs/btrfs/tree-log.c
+++ b/trunk/fs/btrfs/tree-log.c
@@ -1995,12 +1995,13 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	if (atomic_read(&root->log_commit[(index1 + 1) % 2]))
 		wait_log_commit(trans, root, root->log_transid - 1);
 
-	while (root->log_multiple_pids) {
+	while (1) {
 		unsigned long batch = root->log_batch;
-		mutex_unlock(&root->log_mutex);
-		schedule_timeout_uninterruptible(1);
-		mutex_lock(&root->log_mutex);
-
+		if (root->log_multiple_pids) {
+			mutex_unlock(&root->log_mutex);
+			schedule_timeout_uninterruptible(1);
+			mutex_lock(&root->log_mutex);
+		}
 		wait_for_writer(trans, root);
 		if (batch == root->log_batch)
 			break;