powerpc/pseries/cmm: Rip out memory isolate notifier
The memory isolate notifier was added to allow to offline memory blocks that contain inflated/"loaned" pages. We can achieve the same using the balloon compaction framework. Get rid of the memory isolate notifier. Also, we can get rid of cmm_mem_going_offline(), as we will never reach that code path now when we have allocated memory in the balloon (allocated pages are unmovable and will no longer be special-cased using the memory isolation notifier). Leave the memory notifier in place, so we can still back off in case memory gets offlined. Signed-off-by:David Hildenbrand <david@redhat.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191031142933.10779-7-david@redhat.com
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