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authorJan Glauber <jang@linux.vnet.ibm.com>2011-03-15 17:08:19 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-03-15 17:08:22 +0100
commit2c190da477c9ab167f5bb37414d99ef2063b388a (patch)
tree98da49d91b1aa3fa8f317a8ca85c5f990ad0aaf6
parent521cb40b0c44418a4fd36dc633f575813d59a43d (diff)
downloadlinux-2c190da477c9ab167f5bb37414d99ef2063b388a.tar.bz2
[S390] remove redundant stack check option
Newer gcc versions offer an architecture-independent option to check the stack size and warn if it reaches a certain limit. This option already existed for s390 by using -mwarn-dynamicstack. Since one stack check option is enough remove the s390 specific stack check but keep the option that warns about dynamic stack usage because that is not covered by the generic option. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--arch/s390/Kconfig20
-rw-r--r--arch/s390/Makefile3
2 files changed, 6 insertions, 17 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 636bcb81d068..271a02f821c0 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -341,26 +341,16 @@ config STACK_GUARD
The minimum size for the stack guard should be 256 for 31 bit and
512 for 64 bit.
-config WARN_STACK
+config WARN_DYNAMIC_STACK
def_bool n
- prompt "Emit compiler warnings for function with broken stack usage"
+ prompt "Emit compiler warnings for function with dynamic stack usage"
help
- This option enables the compiler options -mwarn-framesize and
- -mwarn-dynamicstack. If the compiler supports these options it
- will generate warnings for function which either use alloca or
- create a stack frame bigger than CONFIG_WARN_STACK_SIZE.
+ This option enables the compiler option -mwarn-dynamicstack. If the
+ compiler supports this options generates warnings for functions
+ that dynamically allocate stack space using alloca.
Say N if you are unsure.
-config WARN_STACK_SIZE
- int "Maximum frame size considered safe (128-2048)"
- range 128 2048
- depends on WARN_STACK
- default "2048"
- help
- This allows you to specify the maximum frame size a function may
- have without the compiler complaining about it.
-
config ARCH_POPULATES_NODE_MAP
def_bool y
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index d5b8a6ade525..27a0b5df5ead 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -80,8 +80,7 @@ endif
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)
+cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
endif
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)