diff --git a/[refs] b/[refs]
index 0f986873d6d3..722b19a857cf 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1d3f4b905a786d69103d9e6d8e92683fb2c7a027
+refs/heads/master: 63019d9329628a5056b3a0c76aee955873dc25c3
diff --git a/trunk/drivers/infiniband/hw/mlx4/mlx4_ib.h b/trunk/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 24ccadd6e4f8..40b83914b7b2 100644
--- a/trunk/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/trunk/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -35,6 +35,7 @@
 
 #include <linux/compiler.h>
 #include <linux/list.h>
+#include <linux/mutex.h>
 
 #include <rdma/ib_verbs.h>
 #include <rdma/ib_umem.h>