[v2] selftests/powerpc: Skip the subpage_prot tests if the syscall is unavailable

[Michael Ellerman]

On Fri, 2018-03-02 at 02:01:08 UTC, Michael Ellerman wrote:
> The subpage_prot syscall is only functional when the system is using
> the Hash MMU. Since commit 5b2b80714796 ("powerpc/mm: Invalidate
> subpage_prot() system call on radix platforms") it returns ENOENT when
> the Radix MMU is active. Currently this just makes the test fail.
> 
> Additionally the syscall is not available if the kernel is built with
> 4K pages, or if CONFIG_PPC_SUBPAGE_PROT=n, in which case it returns
> ENOSYS because the syscall is missing entirely.
> 
> So check explicitly for ENOENT and ENOSYS and skip if we see either of
> those.
> 
> Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>

Applied to powerpc fixes.

https://git.kernel.org/powerpc/c/cd4a6f3ab4d80cb919d15897eb3cbc

cheers