Commit f5711f9d authored by Heiko Carstens's avatar Heiko Carstens Committed by Vasily Gorbik
Browse files

s390: remove WARN_DYNAMIC_STACK 



s390 is the only architecture which allows to set the
-mwarn-dynamicstack compile option. This however will also always
generate a warning with system call stack randomization, which uses
alloca to generate some random sized stack frame.

On the other hand Linus just enabled "-Werror" by default with commit
3fe617cc ("Enable '-Werror' by default for all kernel builds"),
which means compiles will always fail by default.

So instead of playing once again whack-a-mole for something which is
s390 specific, simply remove this option.

Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 948e5055

arch/s390/Kconfig

+0 −10
Original line number Diff line number Diff line
@@ -685,16 +685,6 @@ config STACK_GUARD 
	  The minimum size for the stack guard should be 256 for 31 bit and

	  512 for 64 bit.



config WARN_DYNAMIC_STACK

	def_bool n

	prompt "Emit compiler warnings for function with dynamic stack usage"

	help

	  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.



endmenu



menu "I/O subsystem"

arch/s390/Makefile

+0 −7
Original line number Diff line number Diff line
@@ -85,13 +85,6 @@ cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD) 
endif

endif



ifdef CONFIG_WARN_DYNAMIC_STACK

  ifneq ($(call cc-option,-mwarn-dynamicstack),)

    KBUILD_CFLAGS += -mwarn-dynamicstack

    KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack

  endif

endif



ifdef CONFIG_EXPOLINE

  ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)

    CC_FLAGS_EXPOLINE := -mindirect-branch=thunk