CFLAGS += -m31
AFLAGS += -m31
UTS_MACHINE := s390
+STACK_SIZE := 8192
endif
ifdef CONFIG_ARCH_S390X
CFLAGS += -m64
AFLAGS += -m64
UTS_MACHINE := s390x
+STACK_SIZE := 16384
endif
-cflags-$(CONFIG_MARCH_G5) += $(call check_gcc,-march=g5,)
-cflags-$(CONFIG_MARCH_Z900) += $(call check_gcc,-march=z900,)
-cflags-$(CONFIG_MARCH_Z990) += $(call check_gcc,-march=z990,)
+cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
+cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
+cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
+
+ifeq ($(call cc-option-yn,-mkernel-backchain),y)
+cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
+aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
+cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
+aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
+ifdef CONFIG_SMALL_STACK
+STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
+endif
+endif
+
+ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
+cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
+cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
+endif
+
+ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
+cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
+cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
+endif
-CFLAGS += $(cflags-y)
-CFLAGS += $(call check_gcc,-finline-limit=10000,)
+CFLAGS += -mbackchain $(cflags-y)
+CFLAGS += $(call cc-option,-finline-limit=10000)
CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
-CFLAGS += -mbackchain
+AFLAGS += $(aflags-y)
OBJCOPYFLAGS := -O binary
LDFLAGS_vmlinux := -e start