[PATCH V3 01/30] mm: Make vm_get_page_prot arch specific.
Aneesh Kumar K.V
aneesh.kumar at linux.vnet.ibm.com
Fri Feb 19 13:40:26 AEDT 2016
Dave Hansen <dave.hansen at 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
>>  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:
> So I'd prefer that it stay in place. :)
Ok. I will update the patch to keep that.
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