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[v5,04/13] mm/vmemmap: Allow architectures to override how vmemmap optimization works

Message ID 20230718022934.90447-5-aneesh.kumar@linux.ibm.com (mailing list archive)
State New
Headers show
Series Add support for DAX vmemmap optimization for ppc64 | expand

Commit Message

Aneesh Kumar K.V July 18, 2023, 2:29 a.m. UTC 
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 <aneesh.kumar@linux.ibm.com>
---
 mm/sparse-vmemmap.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index a044a130405b..a2cbe44c48e1 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -358,6 +358,7 @@  int __meminit vmemmap_populate_hugepages(unsigned long start, unsigned long end,
 	return 0;
 }
 
+#ifndef vmemmap_populate_compound_pages
 /*
  * For compound pages bigger than section size (e.g. x86 1G compound
  * pages with 2M subsection size) fill the rest of sections as tail
@@ -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)