[patch 2/8] lock validator: s390 CONFIG_FRAME_POINTER support

[patch 2/8] lock validator: s390 CONFIG_FRAME_POINTER support

[Heiko Carstens]

From: Heiko Carstens <heiko.carstens@de.ibm.com>

CONFIG_FRAME_POINTER support for s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
---

 arch/s390/Makefile |    5 +++++
 lib/Kconfig.debug  |    2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff -purN a/arch/s390/Makefile b/arch/s390/Makefile
--- a/arch/s390/Makefile	2006-06-14 10:56:55.000000000 +0200
+++ b/arch/s390/Makefile	2006-06-14 12:51:12.000000000 +0200
@@ -38,6 +38,11 @@ cflags-$(CONFIG_MARCH_G5)   += $(call cc
 cflags-$(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 -purN a/lib/Kconfig.debug b/lib/Kconfig.debug
--- a/lib/Kconfig.debug	2006-06-14 10:57:14.000000000 +0200
+++ b/lib/Kconfig.debug	2006-06-14 12:51:51.000000000 +0200
@@ -503,7 +503,7 @@ 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
 	help
 	  If you say Y here the resulting kernel image will be slightly larger