diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index 8800cf090694766b87b6a881f28a93d77346aec2..635d677d3281e31eedf36a240b2a886e2d2f50cc 100644
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -6,7 +6,7 @@ COMPILE_VERSION := __linux_compile_version_id__`hostname |  \
 			tr -c '[0-9A-Za-z]' '_'`__`date | \
 			tr -c '[0-9A-Za-z]' '_'`_t
 
-EXTRA_CFLAGS  := -DCOMPILE_VERSION=$(COMPILE_VERSION) -gstabs -I.
+ccflags-y  := -DCOMPILE_VERSION=$(COMPILE_VERSION) -gstabs -I.
 
 targets := image
 targets += bzImage
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index e5221ec0b8e3eeb5b008aefb891841e795d98221..860d26514c08dce870a8810dee1ff1e2a676b719 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -8,7 +8,7 @@
 
 common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o)
 
-EXTRA_CFLAGS += -Ivirt/kvm -Iarch/s390/kvm
+ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
 
 kvm-objs := $(common-objs) kvm-s390.o sie64a.o intercept.o interrupt.o priv.o sigp.o diag.o
 obj-$(CONFIG_KVM) += kvm.o
diff --git a/arch/s390/math-emu/Makefile b/arch/s390/math-emu/Makefile
index c84890341052ce7377fbcf9eb75e11436157dea6..51d399549f604cc2632c329ec1a9776862cc3623 100644
--- a/arch/s390/math-emu/Makefile
+++ b/arch/s390/math-emu/Makefile
@@ -4,4 +4,4 @@
 
 obj-$(CONFIG_MATHEMU) := math.o
 
-EXTRA_CFLAGS := -I$(src) -Iinclude/math-emu -w
+ccflags-y := -I$(src) -Iinclude/math-emu -w