[RESEND 2/3] powerpc/memcpy: Add memcpy_mcsafe for pmem

[Balbir Singh]

On Wed, May 2, 2018 at 6:57 AM, Dan Williams <dan.j.williams at intel.com> wrote:
> On Thu, Apr 5, 2018 at 8:00 AM, Dan Williams <dan.j.williams at intel.com> wrote:
>> On Wed, Apr 4, 2018 at 11:45 PM, Nicholas Piggin <npiggin at gmail.com> wrote:
> [,,]
>>> What's the problem with just counting bytes copied like usercopy --
>>> why is that harder than cacheline accuracy?
>>>
>>>> I'd rather implement the existing interface and port/support the new interface
>>>> as it becomes available
>>>
>>> Fair enough.
>>
>> I have patches already in progress to change the interface. My
>> preference is to hold off on adding a new implementation that will
>> need to be immediately reworked. When I say "immediate" I mean that
>> should be able to post what I have for review within the next few
>> days.
>>
>> Whether this is all too late for 4.17 is another question...
>
> Here is the x86 version of a 'bytes remaining' memcpy_mcsafe() implemenation:
>
>     https://lists.01.org/pipermail/linux-nvdimm/2018-May/015548.html

Thanks for the heads up! I'll work on the implementation for powerpc.

Balbir Singh.