Re: [RFC v2 1/2] mm: khugepaged: recover from poisoned anonymous memory

[Jiaqi Yan <jiaqiyan@xxxxxxxxxx>]

Replacement patch to fix build error on architectures that define
__HAVE_ARCH_COPY_HIGHPAGE, i.e. move copy_highpage_mc out
of the "#ifndef __HAVE_ARCH_COPY_HIGHPAGE" block.