Re: [PATCH] selftests/mm: remove the local PKEY_UNRESTRICTED fallback

["David Hildenbrand (Arm)" <david@kernel.org>]

On 8/18/26 13:49, Hemanth Selam wrote:
> pkey-helpers.h defines PKEY_UNRESTRICTED itself when the macro is not
> already known, a stopgap from when the generic definition was still
> under review.  It has been merged since, commit 6d61527d931b ("mm/pkey:
> Add PKEY_UNRESTRICTED macro"), and pkey-helpers.h already includes
> <linux/mman.h>, so the guard is never taken.  Honour the FIXME and drop
> it.
> 
> The mm selftests build against the headers of the kernel source, see
> Documentation/dev-tools/kselftest.rst.  Building them without "make
> headers", against system headers predating the macro, now fails to
> compile instead of quietly falling back.
> 
> No functional change intended.
> 
> Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com>
> ---
>  tools/testing/selftests/mm/pkey-helpers.h | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/tools/testing/selftests/mm/pkey-helpers.h b/tools/testing/selftests/mm/pkey-helpers.h
> index 2c377f4e9df1..626c2e1655dc 100644
> --- a/tools/testing/selftests/mm/pkey-helpers.h
> +++ b/tools/testing/selftests/mm/pkey-helpers.h
> @@ -112,13 +112,6 @@ void record_pkey_malloc(void *ptr, long size, int prot);
>  #define PKEY_MASK	(PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)
>  #endif
>  
> -/*
> - * FIXME: Remove once the generic PKEY_UNRESTRICTED definition is merged.
> - */
> -#ifndef PKEY_UNRESTRICTED
> -#define PKEY_UNRESTRICTED 0x0
> -#endif
> -
>  #ifndef set_pkey_bits
>  static inline u64 set_pkey_bits(u64 reg, int pkey, u64 flags)
>  {

tools/include/uapi/asm-generic/mman-common.h:#define PKEY_UNRESTRICTED  0x0

So that looks good.

But we seem to have the same ifdef also in
tools/testing/selftests/powerpc/include/pkeys.h.

So likely that should be removed as well (after making sure that it compiles?)

-- 
Cheers,

David