This is a note to let you know that I've just added the patch titled
arm64: vdso: fix build error when switching from LE to BE
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-vdso-fix-build-error-when-switching-from-le-to-be.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1915e2ad1cf548217c963121e4076b3d44dd0169 Mon Sep 17 00:00:00 2001
From: Arun Chandran <achandran@xxxxxxxxxx>
Date: Thu, 26 Jun 2014 15:16:03 +0530
Subject: arm64: vdso: fix build error when switching from LE to BE
From: Arun Chandran <achandran@xxxxxxxxxx>
commit 1915e2ad1cf548217c963121e4076b3d44dd0169 upstream.
Building a kernel with CPU_BIG_ENDIAN fails if there are stale objects
from a !CPU_BIG_ENDIAN build. Due to a missing FORCE prerequisite on an
if_changed rule in the VDSO Makefile, we attempt to link a stale LE
object into the new BE kernel.
According to Documentation/kbuild/makefiles.txt, FORCE is required for
if_changed rules and forgetting it is a common mistake, so fix it by
'Forcing' the build of vdso. This patch fixes build errors like these:
arch/arm64/kernel/vdso/note.o: compiled for a little endian system and target is big endian
failed to merge target specific data of file arch/arm64/kernel/vdso/note.o
arch/arm64/kernel/vdso/sigreturn.o: compiled for a little endian system and target is big endian
failed to merge target specific data of file arch/arm64/kernel/vdso/sigreturn.o
Tested-by: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Arun Chandran <achandran@xxxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/kernel/vdso/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -43,7 +43,7 @@ $(obj)/vdso-offsets.h: $(obj)/vdso.so.db
$(call if_changed,vdsosym)
# Assembly rules for the .S files
-$(obj-vdso): %.o: %.S
+$(obj-vdso): %.o: %.S FORCE
$(call if_changed_dep,vdsoas)
# Actual build commands
Patches currently in stable-queue which might be from achandran@xxxxxxxxxx are
queue-3.14/arm64-vdso-fix-build-error-when-switching-from-le-to-be.patch
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