diff --git a/[refs] b/[refs]
index 5397828c8c7c..67d8e9956614 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 78944086663e6c1b03f3d60bf7610128149be5fc
+refs/heads/master: 28739eea9cd42598b632972f5cc64a458c5d40b3
diff --git a/trunk/fs/ext4/mballoc.c b/trunk/fs/ext4/mballoc.c
index 38a11bf79329..396b01f5c4fb 100644
--- a/trunk/fs/ext4/mballoc.c
+++ b/trunk/fs/ext4/mballoc.c
@@ -4825,11 +4825,11 @@ ext4_trim_all_free(struct super_block *sb, ext4_group_t group,
 				"information for %u", group);
 		return ret;
 	}
-
 	bitmap = e4b.bd_bitmap;
+
+	ext4_lock_group(sb, group);
 	start = (e4b.bd_info->bb_first_free > start) ?
 		e4b.bd_info->bb_first_free : start;
-	ext4_lock_group(sb, group);
 
 	while (start < max) {
 		start = mb_find_next_zero_bit(bitmap, max, start);