diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 8de5be3..45a2e5b 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -21,7 +21,7 @@
  * spinlock are used either at boot time (when only a single CPU is active), or
  * when the system is fully coherent.
  */
-spinlock_t gic_lock;
+static spinlock_t gic_lock;
 
 /*
  * Redistributor power operations are weakly bound so that they can be
diff --git a/drivers/arm/gic/v3/gicv3_private.h b/drivers/arm/gic/v3/gicv3_private.h
index 5203907..c4474a4 100644
--- a/drivers/arm/gic/v3/gicv3_private.h
+++ b/drivers/arm/gic/v3/gicv3_private.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -79,6 +79,8 @@
 void gicr_clr_igrpmodr0(uintptr_t base, unsigned int id);
 void gicr_clr_igroupr0(uintptr_t base, unsigned int id);
 void gicr_set_ipriorityr(uintptr_t base, unsigned int id, unsigned int pri);
+void gicr_set_icfgr0(uintptr_t base, unsigned int id, unsigned int cfg);
+void gicr_set_icfgr1(uintptr_t base, unsigned int id, unsigned int cfg);
 
 /*******************************************************************************
  * Private GICv3 helper function prototypes
diff --git a/drivers/arm/tzc/tzc400.c b/drivers/arm/tzc/tzc400.c
index 34462a9..0999fa5 100644
--- a/drivers/arm/tzc/tzc400.c
+++ b/drivers/arm/tzc/tzc400.c
@@ -34,7 +34,7 @@
 	uint8_t num_regions;
 } tzc400_instance_t;
 
-tzc400_instance_t tzc400;
+static tzc400_instance_t tzc400;
 
 static inline unsigned int _tzc400_read_build_config(uintptr_t base)
 {
diff --git a/drivers/arm/tzc/tzc_common_private.h b/drivers/arm/tzc/tzc_common_private.h
index 89156ed..e1b7727 100644
--- a/drivers/arm/tzc/tzc_common_private.h
+++ b/drivers/arm/tzc/tzc_common_private.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -93,7 +93,7 @@
  * It is used to program region 0 ATTRIBUTES and ACCESS register.
  */
 #define DEFINE_TZC_COMMON_CONFIGURE_REGION0(fn_name)			\
-	void _tzc##fn_name##_configure_region0(uintptr_t base,		\
+	static void _tzc##fn_name##_configure_region0(uintptr_t base,	\
 			   tzc_region_attributes_t sec_attr,		\
 			   unsigned int ns_device_access)		\
 	{								\
@@ -124,7 +124,7 @@
  * that function).
  */
 #define DEFINE_TZC_COMMON_CONFIGURE_REGION(fn_name)			\
-	void _tzc##fn_name##_configure_region(uintptr_t base,		\
+	static void _tzc##fn_name##_configure_region(uintptr_t base,	\
 				unsigned int filters,			\
 				int region_no,				\
 				unsigned long long region_base,		\