[V2] powerpc/mm: Invalidate subpage_prot() system call on radix platforms

[Michael Ellerman]

On Mon, 2017-12-04 at 05:49:22 UTC, Anshuman Khandual wrote:
> Radix enabled platforms don't support subpage_prot() system calls. But
> at present the system call goes through without an error and fails
> later on while validating expected subpage accesses. Lets not allow
> the system call on powerpc radix platforms to begin with to prevent
> this confusion in user space.
> 
> Signed-off-by: Anshuman Khandual <khandual at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/5b2b80714796073ec9e196c7aeec59

cheers