powerpc/radix/mm: Fixup storage key mm fault

[Michael Ellerman]

On Wed, 2016-11-30 at 00:35:36 UTC, Balbir Singh wrote:
> Aneesh/Ben reported that the change to do_page_fault() needs
> to handle the case where CPU_FTR_COHERENT_ICACHE is missing
> but we have CPU_FTR_NOEXECUTE. In those cases the check
> added for SRR1_ISI_N_OR_G might trigger a false positive.
> 
> This patch checks for CPU_FTR_COHERENT_ICACHE in addition
> to the MSR value
> 
> Reported-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
> Signed-off-by: Balbir Singh <bsingharora at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/0ab5171b8971282d7562b77f9b1413

cheers