[RFC PATCH v2 27/51] mm: hugetlb: Expose hugetlb_subpool_{get,put}_pages()

[Ackerley Tng <ackerleytng@xxxxxxxxxx>]

This will allow hugetlb subpools to be used by guestmem_hugetlb.

Signed-off-by: Ackerley Tng <ackerleytng@xxxxxxxxxx>
Change-Id: I909355935f2ab342e65e7bfdc106bedd1dc177c9
---
 include/linux/hugetlb.h | 3 +++
 mm/hugetlb.c            | 6 ++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index c59264391c33..e6b90e72d46d 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -119,6 +119,9 @@ struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
 					      long min_hpages, bool use_surplus);
 void hugepage_put_subpool(struct hugepage_subpool *spool);
 
+long hugepage_subpool_get_pages(struct hugepage_subpool *spool, long delta);
+long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta);
+
 void hugetlb_dup_vma_private(struct vm_area_struct *vma);
 void clear_vma_resv_huge_pages(struct vm_area_struct *vma);
 int move_hugetlb_page_tables(struct vm_area_struct *vma,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d22c5a8fd441..816f257680be 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -205,8 +205,7 @@ void hugepage_put_subpool(struct hugepage_subpool *spool)
  * only be different than the passed value (delta) in the case where
  * a subpool minimum size must be maintained.
  */
-static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,
-				      long delta)
+long hugepage_subpool_get_pages(struct hugepage_subpool *spool, long delta)
 {
 	long ret = delta;
 
@@ -250,8 +249,7 @@ static long hugepage_subpool_get_pages(struct hugepage_subpool *spool,
  * The return value may only be different than the passed value (delta)
  * in the case where a subpool minimum size must be maintained.
  */
-static long hugepage_subpool_put_pages(struct hugepage_subpool *spool,
-				       long delta)
+long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta)
 {
 	long ret = delta;
 	unsigned long flags;
-- 
2.49.0.1045.g170613ef41-goog