s390/vdso: Drop '-shared' from KBUILD_CFLAGS_64
When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it points out that there is a linking phase flag added to CFLAGS, which will only be used for compiling clang-16: error: argument unused during compilation: '-shared' [-Werror,-Wunused-command-line-argument] '-shared' is already present in ldflags-y so it can just be dropped. Fixes: 2b2a2584 ("s390/vdso: Use $(LD) instead of $(CC) to link vDSO") Signed-off-by: Nathan Chancellor <nathan@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Sven Schnelle <svens@linux.ibm.com> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org> Tested-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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