On Tue, Jun 5, 2018 at 7:05 PM, Nick Desaulniers
<ndesaulniers@xxxxxxxxxx> wrote:
>
> The semantics of extern inline has changed since gnu89. This means that
> folks using GCC versions >= 5.1 may see symbol redefinition errors at
> link time for subdirs that override KBUILD_CFLAGS (making the C standard
> used implicit) regardless of this patch. This has been cleaned up
> earlier in the patch set, but is left as a note in the commit message
> for future travelers.
I think the keyword you are missing is
__attribute__((gnu_inline))
which forces the gnu89 behavior on all compiler versions. It's been supported
since gcc-4.2, so it should not cause problems on any compiler that is able
to build an x86 kernel.
Arnd
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