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| author | Arun Chandran <achandran@mvista.com> | 2014-06-26 15:16:03 +0530 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-07-30 15:06:35 +0100 |
| commit | 1915e2ad1cf548217c963121e4076b3d44dd0169 (patch) | |
| tree | de6a874c51fa4e9ff318bd66b53bae5ee6fff219 /arch/arm64/kernel/vdso | |
| parent | af9b99647cd2a6a2b8a4a1c9ba6193dd375218b5 (diff) | |
| download | linux-1915e2ad1cf548217c963121e4076b3d44dd0169.tar.gz linux-1915e2ad1cf548217c963121e4076b3d44dd0169.tar.bz2 linux-1915e2ad1cf548217c963121e4076b3d44dd0169.zip | |
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')
| -rw-r--r-- | arch/arm64/kernel/vdso/Makefile | 2 |
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 |