powerpc/mm/hash: hard disable irq in the SLB insert path

[Michael Ellerman]

On Fri, 2018-06-01 at 08:24:02 UTC, "Aneesh Kumar K.V" wrote:
> When inserting SLB entries for EA above 512TB, we need to hard disable irq.
> This will make sure we don't take a PMU interrupt that can possibly touch
> user space address via a stack dump. To prevent this, we need to hard disable
> the interrupt.
> 
> Also add a comment explaining why we don't need context synchronizing isync
> with slbmte.
> 
> Fixes: f384796c4 ("powerpc/mm: Add support for handling > 512TB address in SLB miss")
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/a5db5060e0b2e27605df272224bfd4

cheers