[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 ce13ad689d191701698d9fa3dbd301c6fdb4d574..3ad2c4af099cf67fa5bff6016347021913d76aee 100644 (file)
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -46,6 +46,10 @@ config GENERIC_IOMAP
        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 ff04dcd3020043791d5c4923196bef02785c46f5..d0d94e56b90b9ec8ab65c4780c4b0804663482af 100644 (file)
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -43,6 +43,10 @@ config GENERIC_NVRAM
        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 f5508abf1188a866e6c8b549b2548defcfbee010..257ff66d83cf1e3653e0683deb9132b84be77466 100644 (file)
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -40,6 +40,10 @@ config COMPAT
        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 eb88b446c2ccade2c1983db855c1bd16034debcf..b01d26fe8db71abdd0397bcb25eb4e47d3f8c45e 100644 (file)
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -29,7 +29,7 @@ obj-$(CONFIG_SYSFS) += ksysfs.o
 obj-$(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