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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-07-03 07:24:38 (GMT)
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 22:27:02 (GMT)
commitcbbd1fa72d22896332301ca7e6b7164284be105c (patch)
treea041ce22738c56b189aa1251ccc7e232385bb4a1
parent8637c09901049f061b94f684915d4f18ecf91d79 (diff)
downloadlinux-cbbd1fa72d22896332301ca7e6b7164284be105c.tar.xz
[PATCH] lockdep: s390 CONFIG_FRAME_POINTER support
CONFIG_FRAME_POINTER support for s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/s390/Makefile5
-rw-r--r--lib/Kconfig.debug2
2 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index b3791fb..74ef57d 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -34,6 +34,11 @@ cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
+#
+# Prevent tail-call optimizations, to get clearer backtraces:
+#
+cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
+
# old style option for packed stacks
ifeq ($(call cc-option-yn,-mkernel-backchain),y)
cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 04e374c..91e338a 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -208,7 +208,7 @@ config DEBUG_VM
config FRAME_POINTER
bool "Compile the kernel with frame pointers"
- depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML)
+ depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390)
default y if DEBUG_INFO && UML
help
If you say Y here the resulting kernel image will be slightly larger