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Commit 7d12e522 authored by Anton Blanchard's avatar Anton Blanchard Committed by Linus Torvalds
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[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: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 696c2b9f

arch/ia64/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

arch/ppc/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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"

arch/ppc64/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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

kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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