linux-kernel - [PATCH 40/74] lto, powerpc: Disable LTO for the powerpc VDSO

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Date:	Sat, 18 Aug 2012 19:56:36 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org, mmarek@...e.cz, linux-kbuild@...r.kernel.org,
	JBeulich@...e.com, akpm@...ux-foundation.org,
	Andi Kleen <ak@...ux.intel.com>, benh@...nel.crashing.org
Subject: [PATCH 40/74] lto, powerpc: Disable LTO for the powerpc VDSO

From: Andi Kleen <ak@...ux.intel.com>

VDSO does not play well with LTO, so just disable it.

(note that powerpc will likely need more changes for LTO, this was
just from grep)

Cc: benh@...nel.crashing.org
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 arch/powerpc/kernel/vdso32/Makefile |    2 +-
 arch/powerpc/kernel/vdso64/Makefile |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
index 53e6c9b..8cc88bf 100644
--- a/arch/powerpc/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile
@@ -16,7 +16,7 @@ obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
 
 GCOV_PROFILE := n
 
-ccflags-y := -shared -fno-common -fno-builtin
+ccflags-y := -shared -fno-common -fno-builtin $(DISABLE_LTO)
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
 		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
 asflags-y := -D__VDSO32__ -s
diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index effca94..5bca644 100644
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
@@ -9,7 +9,7 @@ obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
 
 GCOV_PROFILE := n
 
-ccflags-y := -shared -fno-common -fno-builtin
+ccflags-y := -shared -fno-common -fno-builtin $(DISABLE_LTO)
 ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
 		$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
 asflags-y := -D__VDSO64__ -s
-- 
1.7.7.6

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