mm/huge_memory: page_add_file_rmap() -> folio_add_file_rmap_pmd()

Let's convert remove_migration_pmd() and while at it, perform some folio
conversion.

Link: https://lkml.kernel.org/r/20231220224504.646757-10-david@redhat.comSigned-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/huge_memory.c

@@ -3577,6 +3577,7 @@ int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
 
 void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
 {
+	struct folio *folio = page_folio(new);
 	struct vm_area_struct *vma = pvmw->vma;
 	struct mm_struct *mm = vma->vm_mm;
 	unsigned long address = pvmw->address;
@@ -3588,7 +3589,7 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
 		return;
 
 	entry = pmd_to_swp_entry(*pvmw->pmd);
-	get_page(new);
+	folio_get(folio);
 	pmde = mk_huge_pmd(new, READ_ONCE(vma->vm_page_prot));
 	if (pmd_swp_soft_dirty(*pvmw->pmd))
 		pmde = pmd_mksoft_dirty(pmde);
@@ -3599,10 +3600,10 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
 	if (!is_migration_entry_young(entry))
 		pmde = pmd_mkold(pmde);
 	/* NOTE: this may contain setting soft-dirty on some archs */
-	if (PageDirty(new) && is_migration_entry_dirty(entry))
+	if (folio_test_dirty(folio) && is_migration_entry_dirty(entry))
 		pmde = pmd_mkdirty(pmde);
 
-	if (PageAnon(new)) {
+	if (folio_test_anon(folio)) {
 		rmap_t rmap_flags = RMAP_COMPOUND;
 
 		if (!is_readable_migration_entry(entry))
@@ -3610,9 +3611,9 @@ void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new)
 
 		page_add_anon_rmap(new, vma, haddr, rmap_flags);
 	} else {
-		page_add_file_rmap(new, vma, true);
+		folio_add_file_rmap_pmd(folio, new, vma);
 	}
-	VM_BUG_ON(pmd_write(pmde) && PageAnon(new) && !PageAnonExclusive(new));
+	VM_BUG_ON(pmd_write(pmde) && folio_test_anon(folio) && !PageAnonExclusive(new));
 	set_pmd_at(mm, haddr, pvmw->pmd, pmde);
 
 	/* No need to invalidate - it was non-present before */