[V2] powerpc/mm/hash: Clear the invalid slot information correctly

[Michael Ellerman]

On Sat, 2016-20-02 at 15:11:54 UTC, "Aneesh Kumar K.V" wrote:
> We can get a hash pte fault with 4k base page size and find the pte
> already inserted with 64K base page size. In that case we need to clear
> the existing slot information from the old pte. Fix this correctly
> 
> With THP, we also clear the slot information with respect to all
> the 64K hash pte mapping that 16MB page. They are all invalid
> now. This make sure we don't find the slot valid when we fault with
> 4k base page size. Finding the slot valid should not result in any wrong
> behavior because we do check again in hash page table for the validity.
> But we can avoid that check completely.
> 
> Fixes: a43c0eb8364c022 ("powerpc/mm: Convert 4k hash insert to C")
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/9ab3ac233a8b4ffcc27c8475b8

cheers