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Date: Wed, 20 Nov 2013 15:36:36 +1100
From: Paul Mackerras <paulus@samba.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH -V2 4/5] powerpc: mm: Only check for _PAGE_PRESENT in
 set_pte/pmd functions
Message-ID: <20131120043636.GC5281@iris.ozlabs.ibm.com>
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On Mon, Nov 18, 2013 at 02:58:12PM +0530, Aneesh Kumar K.V wrote:
> From: "Aneesh Kumar K.V" <aneesh.kumar@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@linux.vnet.ibm.com>

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