From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Ingo Molnar <mingo@elte.hu>,
Arjan van de Ven <arjan@infradead.org>,
Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: [patch 2/8] lock validator: s390 CONFIG_FRAME_POINTER support
Date: Wed, 14 Jun 2006 16:17:33 +0200 [thread overview]
Message-ID: <20060614141733.GC1241@osiris.boeblingen.de.ibm.com> (raw)
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
reply other threads:[~2006-06-14 14:17 UTC|newest]
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