[v5 3/6] powerpc/memcpy: Add memcpy_mcsafe for pmem

[Nicholas Piggin]

Santosh Sivaraj's on July 9, 2019 10:15 pm:
> From: Balbir Singh <bsingharora at gmail.com>
> 
> The pmem infrastructure uses memcpy_mcsafe in the pmem layer so as to
> convert machine check exceptions into a return value on failure in case
> a machine check exception is encountered during the memcpy. The return
> value is the number of bytes remaining to be copied.
> 
> This patch largely borrows from the copyuser_power7 logic and does not add
> the VMX optimizations, largely to keep the patch simple. If needed those
> optimizations can be folded in.

Shouldn't this patch go after the exception table stuff now if you
squashed them together?

Thanks,
Nick