Architectures like powerpc will like to use different page table allocators
and mapping mechanisms to implement vmemmap optimization. Similar to
vmemmap_populate allow architectures to implement
vmemap_populate_compound_pages

Signed-off-by: Aneesh Kumar K.V <redacted>
---
  mm/sparse-vmemmap.c | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index a044a130405b..541b3f69a481 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c

@@ -141,6 +141,7 @@ void __meminit vmemmap_verify(pte_t *pte, int node,
  			start, end - 1);
  }
  
+#ifndef vmemmap_populate_compound_pages
  pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,
  				       struct vmem_altmap *altmap,
  				       struct page *reuse)

@@ -446,6 +447,8 @@ static int __meminit vmemmap_populate_compound_pages(unsigned long start_pfn,
  	return 0;
  }
  
+#endif
+
  struct page * __meminit __populate_section_memmap(unsigned long pfn,
  		unsigned long nr_pages, int nid, struct vmem_altmap *altmap,
  		struct dev_pagemap *pgmap)