Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/rdma/ib_cache.h b/include/rdma/ib_cache.h
index 62e990b..870b5e6 100644
--- a/include/rdma/ib_cache.h
+++ b/include/rdma/ib_cache.h
@@ -54,6 +54,10 @@
 		       void *),
 	void *context);
 
+int rdma_read_gid_l2_fields(const struct ib_gid_attr *attr,
+			    u16 *vlan_id, u8 *smac);
+struct net_device *rdma_read_gid_attr_ndev_rcu(const struct ib_gid_attr *attr);
+
 /**
  * ib_get_cached_pkey - Returns a cached PKey table entry
  * @device: The device to query.