powerpc/mm/hash: Add missing update in slb update sequence.

[Michael Ellerman]

On Wed, 2018-05-30 at 13:18:04 UTC, "Aneesh Kumar K.V" wrote:
> >From ISA
> 
> "For data accesses, the context synchronizing instruction before the slbie,
> slbieg, slbia, slbmte, tlbie, or tlbiel instruction ensures that all preceding
> instructions that access data storage have completed to a point at which they
> have reported all exceptions they will cause."
> 
> Add the missing isync when updating Kernel stack slb entry.
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/91d06971881f71d945910de1286580

cheers