[PATCH] lockdep: s390 CONFIG_FRAME_POINTER support

cbbd1fa7 · Heiko Carstens <[email protected]> · 2006-07-03 00:24:38 -07:00

CONFIG_FRAME_POINTER support for s390.

Signed-off-by: Heiko Carstens <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: cbbd1fa72d22896332301ca7e6b7164284be105c
Parents: 8637c099

Changes

2 files changed · +6 −1

File	Status	Add	Del	Content
arch/s390/Makefile	modified	+5	−0	View file
lib/Kconfig.debug	modified	+1	−1	View file

arch/s390/Makefile

View file

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

lib/Kconfig.debug

View file

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