[PATCH 01/21] shmem: Convert shmem_alloc_hugepage() to use vma_alloc_folio()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

For now, return the head page of the folio, but remove use of the
old alloc_pages_vma() API.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/shmem.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 4b2fea33158e..c89394221a7e 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1527,7 +1527,7 @@ static struct page *shmem_alloc_hugepage(gfp_t gfp,
 	struct vm_area_struct pvma;
 	struct address_space *mapping = info->vfs_inode.i_mapping;
 	pgoff_t hindex;
-	struct page *page;
+	struct folio *folio;
 
 	hindex = round_down(index, HPAGE_PMD_NR);
 	if (xa_find(&mapping->i_pages, &hindex, hindex + HPAGE_PMD_NR - 1,
@@ -1535,13 +1535,11 @@ static struct page *shmem_alloc_hugepage(gfp_t gfp,
 		return NULL;
 
 	shmem_pseudo_vma_init(&pvma, info, hindex);
-	page = alloc_pages_vma(gfp, HPAGE_PMD_ORDER, &pvma, 0, true);
+	folio = vma_alloc_folio(gfp, HPAGE_PMD_ORDER, &pvma, 0, true);
 	shmem_pseudo_vma_destroy(&pvma);
-	if (page)
-		prep_transhuge_page(page);
-	else
+	if (!folio)
 		count_vm_event(THP_FILE_FALLBACK);
-	return page;
+	return &folio->page;
 }
 
 static struct page *shmem_alloc_page(gfp_t gfp,
-- 
2.34.1