mm/hugetlb: convert hugetlb_install_page to folios

Patch series "convert hugetlb fault functions to folios", v2.

This series converts the hugetlb page faulting functions to operate on
folios. These include hugetlb_no_page(), hugetlb_wp(),
copy_hugetlb_page_range(), and hugetlb_mcopy_atomic_pte().


This patch (of 8):

Change hugetlb_install_page() to hugetlb_install_folio().  This reduces
one user of the Huge Page flag macros which take in a page.

Link: https://lkml.kernel.org/r/20230125170537.96973-1-sidhartha.kumar@oracle.com
Link: https://lkml.kernel.org/r/20230125170537.96973-2-sidhartha.kumar@oracle.comSigned-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/hugetlb.c

@@ -4946,14 +4946,14 @@ static bool is_hugetlb_entry_hwpoisoned(pte_t pte)
 }
 
 static void
-hugetlb_install_page(struct vm_area_struct *vma, pte_t *ptep, unsigned long addr,
-		     struct page *new_page)
+hugetlb_install_folio(struct vm_area_struct *vma, pte_t *ptep, unsigned long addr,
+		     struct folio *new_folio)
 {
-	__SetPageUptodate(new_page);
-	hugepage_add_new_anon_rmap(new_page, vma, addr);
-	set_huge_pte_at(vma->vm_mm, addr, ptep, make_huge_pte(vma, new_page, 1));
+	__folio_mark_uptodate(new_folio);
+	hugepage_add_new_anon_rmap(&new_folio->page, vma, addr);
+	set_huge_pte_at(vma->vm_mm, addr, ptep, make_huge_pte(vma, &new_folio->page, 1));
 	hugetlb_count_add(pages_per_huge_page(hstate_vma(vma)), vma->vm_mm);
-	SetHPageMigratable(new_page);
+	folio_set_hugetlb_migratable(new_folio);
 }
 
 int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
@@ -5107,7 +5107,7 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
 					/* huge_ptep of dst_pte won't change as in child */
 					goto again;
 				}
-				hugetlb_install_page(dst_vma, dst_pte, addr, new);
+				hugetlb_install_folio(dst_vma, dst_pte, addr, page_folio(new));
 				spin_unlock(src_ptl);
 				spin_unlock(dst_ptl);
 				continue;