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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: Dave Hansen <dave.hansen@intel.com>, benh@kernel.crashing.org,
 paulus@samba.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org
Subject: Re: [PATCH V3 01/30] mm: Make vm_get_page_prot arch specific.
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References: <1455814254-10226-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
 <1455814254-10226-2-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
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Date: Fri, 19 Feb 2016 08:10:26 +0530
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Dave Hansen <dave.hansen@intel.com> writes:

> On 02/18/2016 08:50 AM, Aneesh Kumar K.V wrote:
>> With next generation power processor, we are having a new mmu model
>> [1] that require us to maintain a different linux page table format.
>> 
>> Inorder to support both current and future ppc64 systems with a single
>> kernel we need to make sure kernel can select between different page
>> table format at runtime. With the new MMU (radix MMU) added, we will
>> have to dynamically switch between different protection map. Hence
>> override vm_get_page_prot instead of using arch_vm_get_page_prot. We
>> also drop arch_vm_get_page_prot since only powerpc used it.
>
> Hi Aneesh,
>
> I've got some patches I'm hoping to get in to 4.6 that start using
> arch_vm_get_page_prot() on x86:
>
>> http://git.kernel.org/cgit/linux/kernel/git/daveh/x86-pkeys.git/commit/?h=pkeys-v024&id=aa1e61398fb598869981cfe48275cff832945669
>
> So I'd prefer that it stay in place. :)

Ok. I will update the patch to keep that.

-aneesh