[PATCH v2] selftests/powerpc: Fix pkey syscall redefinitions

[Michael Ellerman]

Sandipan Das <sandipan at linux.ibm.com> writes:
> On some distros, there are conflicts w.r.t to redefinition
> of pkey syscall numbers which cause build failures. This
> fixes them.
>
> Reported-by: Sachin Sant <sachinp at linux.vnet.ibm.com>
> Signed-off-by: Sandipan Das <sandipan at linux.ibm.com>
> ---
> Previous versions can be found at:
> v1: https://lore.kernel.org/linuxppc-dev/20200803074043.466809-1-sandipan@linux.ibm.com/
>
> Changes in v2:
> - Fix incorrect commit message.
>
> ---
>  tools/testing/selftests/powerpc/include/pkeys.h | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/tools/testing/selftests/powerpc/include/pkeys.h b/tools/testing/selftests/powerpc/include/pkeys.h
> index 6ba95039a034..26eef5c1f8ea 100644
> --- a/tools/testing/selftests/powerpc/include/pkeys.h
> +++ b/tools/testing/selftests/powerpc/include/pkeys.h
> @@ -31,8 +31,13 @@
>  
>  #define SI_PKEY_OFFSET	0x20
>  
> +#undef SYS_pkey_mprotect
>  #define SYS_pkey_mprotect	386

We shouldn't undef them.

They should obviously never change, but if the system headers already
have a definition then we should use that, so I think it should be:

#ifndef SYS_pkey_mprotect
#define SYS_pkey_mprotect	386
#endif

cheers