Commit 2c190da4 authored by Jan Glauber's avatar Jan Glauber Committed by Martin Schwidefsky

[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: default avatarJan Glauber <>
Signed-off-by: default avatarMartin Schwidefsky <>
parent 521cb40b
......@@ -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.
def_bool n
prompt "Emit compiler warnings for function with broken stack usage"
prompt "Emit compiler warnings for function with dynamic stack usage"
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.
int "Maximum frame size considered safe (128-2048)"
range 128 2048
depends on WARN_STACK
default "2048"
This allows you to specify the maximum frame size a function may
have without the compiler complaining about it.
def_bool y
......@@ -80,8 +80,7 @@ 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
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
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