[PATCH] ppc64: remove hidden -fno-omit-frame-pointer for schedule.c
While looking at code generated by gcc4.0 I noticed some functions still
had frame pointers, even after we stopped ppc64 from defining
CONFIG_FRAME_POINTER. It turns out kernel/Makefile hardwires
-fno-omit-frame-pointer on when compiling schedule.c.
Create CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER and define it on architectures
that dont require frame pointers in sched.c code.
(akpm: blame me for the name)
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ce13ad6..3ad2c4a 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -46,6 +46,10 @@
bool
default y
+config SCHED_NO_NO_OMIT_FRAME_POINTER
+ bool
+ default y
+
choice
prompt "System type"
default IA64_GENERIC
diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index ff04dcd..d0d94e5 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -43,6 +43,10 @@
bool
default y
+config SCHED_NO_NO_OMIT_FRAME_POINTER
+ bool
+ default y
+
source "init/Kconfig"
menu "Processor"
diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
index f5508ab..257ff66 100644
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -40,6 +40,10 @@
bool
default y
+config SCHED_NO_NO_OMIT_FRAME_POINTER
+ bool
+ default y
+
# We optimistically allocate largepages from the VM, so make the limit
# large enough (16MB). This badly named config option is actually
# max order + 1
diff --git a/kernel/Makefile b/kernel/Makefile
index eb88b44..b01d26f 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -29,7 +29,7 @@
obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
obj-$(CONFIG_SECCOMP) += seccomp.o
-ifneq ($(CONFIG_IA64),y)
+ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
# needed for x86 only. Why this used to be enabled for all architectures is beyond
# me. I suspect most platforms don't need this, but until we know that for sure