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authorArun Chandran <achandran@mvista.com>2014-06-26 15:16:03 +0530
committerWill Deacon <will.deacon@arm.com>2014-07-30 15:06:35 +0100
commit1915e2ad1cf548217c963121e4076b3d44dd0169 (patch)
treede6a874c51fa4e9ff318bd66b53bae5ee6fff219 /arch/arm64/kernel/vdso/Makefile
parentaf9b99647cd2a6a2b8a4a1c9ba6193dd375218b5 (diff)
downloadlinux-1915e2ad1cf548217c963121e4076b3d44dd0169.tar.gz
arm64: vdso: fix build error when switching from LE to BE
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@arm.com> Signed-off-by: Arun Chandran <achandran@mvista.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/vdso/Makefile')
-rw-r--r--arch/arm64/kernel/vdso/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 84b942612051..ff3bddea482d 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -43,7 +43,7 @@ $(obj)/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
$(call if_changed,vdsosym)
# Assembly rules for the .S files
-$(obj-vdso): %.o: %.S
+$(obj-vdso): %.o: %.S FORCE
$(call if_changed_dep,vdsoas)
# Actual build commands