[PATCH v2 08/12] mm: hugetlb_vmemmap: move alloc_vmemmap_page_list() next to its free helper

[Muchun Song <songmuchun@bytedance.com>]

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@bytedance.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Qi Zheng <qi.zheng@linux.dev>
---
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 d0af251aa533..244cd8a0c78a 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)
+{
+	LIST_HEAD(local);
+
+	for (unsigned int i = 0; i < nr_pages; i++) {
+		struct page *page;
+
+		page = alloc_pages_node(nid, GFP_KERNEL | __GFP_RETRY_MAYFAIL, 0);
+		if (!page) {
+			memmap_pages_add(i);
+			free_vmemmap_page_list(&local);
+			return -ENOMEM;
+		}
+		list_add(&page->lru, &local);
+	}
+	list_splice(&local, head);
+	memmap_pages_add(nr_pages);
+
+	return 0;
+}
+
 static struct page *vmemmap_dup_page_from_list(const struct page *src,
 					       struct list_head *vmemmap_pages)
 {
@@ -325,28 +347,6 @@ 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)
-{
-	LIST_HEAD(local);
-
-	for (unsigned int i = 0; i < nr_pages; i++) {
-		struct page *page;
-
-		page = alloc_pages_node(nid, GFP_KERNEL | __GFP_RETRY_MAYFAIL, 0);
-		if (!page) {
-			memmap_pages_add(i);
-			free_vmemmap_page_list(&local);
-			return -ENOMEM;
-		}
-		list_add(&page->lru, &local);
-	}
-	list_splice(&local, head);
-	memmap_pages_add(nr_pages);
-
-	return 0;
-}
-
 /**
  * vmemmap_remap_alloc - remap the vmemmap virtual address range [@start, end)
  *			 to the page which is from the @vmemmap_pages
-- 
2.54.0