[PATCH -V2 4/5] powerpc: mm: Only check for _PAGE_PRESENT in set_pte/pmd functions

[Paul Mackerras]

On Mon, Nov 18, 2013 at 02:58:12PM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>
> 
> We want to make sure we don't use these function when updating a pte
> or pmd entry that have a valid hpte entry, because these functions
> don't invalidate them. So limit the check to _PAGE_PRESENT bit.
> Numafault core changes use these functions for updating _PAGE_NUMA bits.
> That should be ok because when _PAGE_NUMA is set we can be sure that
> hpte entries are not present.
> 
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>

Acked-by: Paul Mackerras <paulus at samba.org>