[PATCH v4 09/13] mm: hugetlb_vmemmap: move alloc_vmemmap_page_list() next to its free helper

[Muchun Song]

Keep alloc_vmemmap_page_list() together with
free_vmemmap_page_list(). This also allows the folio-oriented
optimization helper introduced in a subsequent change to reuse the
allocator without a forward declaration.

No functional change intended.

Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Reviewed-by: Lance Yang <lance.yang@xxxxxxxxx>
Reviewed-by: Qi Zheng <qi.zheng@xxxxxxxxx>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Tested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
v4:
- Carry the caller-selected allocation mask through the helper move
- Collect Reviewed-by from Oscar Salvador
- Collect Tested-by from Andrew Morton

v3:
- Carry the revised allocation cleanup through the helper move (follow-up
  to review by Mike Rapoport)
- Collect Reviewed-by from Mike Rapoport

v2:
- Collect Reviewed-by from Lance Yang and Qi Zheng
---
 mm/hugetlb_vmemmap.c | 44 ++++++++++++++++++++++----------------------
 1 file changed, 22 insertions(+), 22 deletions(-)

diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index 3968dfe7f5a0..6c248e8fbdde 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -197,6 +197,28 @@ static void free_vmemmap_page_list(struct list_head *list)
 		free_vmemmap_page(page);
 }
 
+static int alloc_vmemmap_page_list(struct list_head *head,
+		unsigned int nr_pages, int nid, gfp_t gfp_mask)
+{
+	struct page *page, *next;
+	LIST_HEAD(new_pages);
+
+	for (unsigned int i = 0; i < nr_pages; i++) {
+		page = alloc_pages_node(nid, gfp_mask | __GFP_RETRY_MAYFAIL, 0);
+		if (!page)
+			goto free_pages;
+		list_add(&page->lru, &new_pages);
+	}
+	list_splice(&new_pages, head);
+	memmap_pages_add(nr_pages);
+
+	return 0;
+free_pages:
+	list_for_each_entry_safe(page, next, &new_pages, lru)
+		__free_page(page);
+	return -ENOMEM;
+}
+
 static struct page *vmemmap_dup_page_from_list(const struct page *src,
 		struct list_head *vmemmap_pages)
 {
@@ -324,28 +346,6 @@ static int vmemmap_remap_free(unsigned long start, unsigned long end,
 	return ret;
 }
 
-static int alloc_vmemmap_page_list(struct list_head *head,
-		unsigned int nr_pages, int nid, gfp_t gfp_mask)
-{
-	struct page *page, *next;
-	LIST_HEAD(new_pages);
-
-	for (unsigned int i = 0; i < nr_pages; i++) {
-		page = alloc_pages_node(nid, gfp_mask | __GFP_RETRY_MAYFAIL, 0);
-		if (!page)
-			goto free_pages;
-		list_add(&page->lru, &new_pages);
-	}
-	list_splice(&new_pages, head);
-	memmap_pages_add(nr_pages);
-
-	return 0;
-free_pages:
-	list_for_each_entry_safe(page, next, &new_pages, lru)
-		__free_page(page);
-	return -ENOMEM;
-}
-
 /**
  * vmemmap_remap_alloc - remap the vmemmap virtual address range [@start, end)
  *			 to the page which is from the @vmemmap_pages
-- 
2.54.0