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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:46 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:43 +0200
commitbe7962856d299a0f231ac36f89f4a89cbecfe0ff (patch)
treecd82d79c1b4b48b6e188bc65654b99237c1252de /arch/s390/Makefile
parent60691d3c2c0fe9ecc264741ff41f283fef579b8a (diff)
downloadlinux-linaro-android-be7962856d299a0f231ac36f89f4a89cbecfe0ff.tar.gz
[S390] Improved kernel stack overflow checking.
Recent cvs versions of gcc have support for an improved stack overflow checking that calculates the size of the guard size for each function. If the compiler accepts -mstack-size without -mstack-guard then the new stack check is available. We always want to use the new stack checker. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/Makefile')
-rw-r--r--arch/s390/Makefile2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index b1e55849646..ece5adc0560 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -67,8 +67,10 @@ endif
ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
+ifneq ($(call cc-option-yn,-mstack-size=8192),y)
cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
endif
+endif
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack