CPPFLAGS_vdso.lds is assigned and referenced internally in each
Makefile.  No need to export it.

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 arch/x86/entry/vdso/Makefile | 2 +-
 arch/x86/um/vdso/Makefile    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 2988506..690df4c 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -44,7 +44,7 @@ obj-y += $(vdso_img_objs)
 targets += $(vdso_img_cfiles)
 targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
 
-export CPPFLAGS_vdso.lds += -P -C
+CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
                        -Wl,--no-undefined \
diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile
index 426681e..3af55cd 100644
--- a/arch/x86/um/vdso/Makefile
+++ b/arch/x86/um/vdso/Makefile
@@ -23,7 +23,7 @@ $(obj)/vdso.o: $(obj)/vdso.so
 
 targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
 
-export CPPFLAGS_vdso.lds += -P -C
+CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
        -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
-- 
2.7.4

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