MIPS: Build microMIPS VDSO for microMIPS kernels

MicroMIPS kernels may be expected to run on microMIPS only cores which
don't support the normal MIPS instruction set, so be sure to pass the
-mmicromips flag through to the VDSO cflags.

Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.4.x-
Patchwork: https://patchwork.linux-mips.org/patch/13349/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index fff01eddf3e915f384d43c417aad04a76797dad7..3b4538ec0102d5d28b15bc6421db11663fb377ff 100644 (file)
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -5,6 +5,7 @@ obj-vdso-y := elf.o gettimeofday.o sigreturn.o
 ccflags-vdso := \
        $(filter -I%,$(KBUILD_CFLAGS)) \
        $(filter -E%,$(KBUILD_CFLAGS)) \
+       $(filter -mmicromips,$(KBUILD_CFLAGS)) \
        $(filter -march=%,$(KBUILD_CFLAGS))
 cflags-vdso := $(ccflags-vdso) \
        $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \