powerpc/mm: factor out creating/removing linear mapping

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We want to stop abusing memory hotplug infrastructure in memtrace code
to perform allocations and remove the linear mapping. Instead we will use
alloc_contig_pages() and remove the linear mapping manually.

Let's factor out creating/removing the linear mapping into
arch_create_linear_mapping() / arch_remove_linear_mapping() - so in the
future, we might be able to have whole arch_add_memory() /
arch_remove_memory() be implemented in common code.

Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201111145322.15793-4-david@redhat.com

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David Hildenbrand 2020-11-11 15:53:17 +01:00 • committed by Michael Ellerman

parent d6718941a2

commit 4abb1e5b63

2 changed files with 31 additions and 13 deletions

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41

arch/powerpc/mm/mem.c

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3

include/linux/memory_hotplug.h

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