Subject: [RFC PATCH 1/3] mm: Export alloc_migrate_huge_page

From: "Aneesh Kumar K.V" <[email-masked]>
Date: Mon, 3 Sep 2018 22:07:31 +0530

We want to use this to support customized huge page migration.

Signed-off-by: Aneesh Kumar K.V <[email-masked]>
---
 include/linux/hugetlb.h | 2 ++
 mm/hugetlb.c            | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index c39d9170a8a0..98c9c6dc308c 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -357,6 +357,8 @@ struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
 				nodemask_t *nmask);
 struct page *alloc_huge_page_vma(struct hstate *h, struct vm_area_struct *vma,
 				unsigned long address);
+struct page *alloc_migrate_huge_page(struct hstate *h, gfp_t gfp_mask,
+				     int nid, nodemask_t *nmask);
 int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
 			pgoff_t idx);
 
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 47566bb0b4b1..88881b3f8628 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1586,8 +1586,8 @@ static struct page *alloc_surplus_huge_page(struct hstate *h, gfp_t gfp_mask,
 	return page;
 }
 
-static struct page *alloc_migrate_huge_page(struct hstate *h, gfp_t gfp_mask,
-		int nid, nodemask_t *nmask)
+struct page *alloc_migrate_huge_page(struct hstate *h, gfp_t gfp_mask,
+				     int nid, nodemask_t *nmask)
 {
 	struct page *page;
 
-- 
2.17.1