mm/damon/vaddr: convert hugetlb related functions to use a folio

Convert damon_hugetlb_mkold() and damon_young_hugetlb_entry() to
use a folio.

Link: https://lkml.kernel.org/r/20221230070849.63358-9-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/damon/vaddr.c

@@ -335,9 +335,9 @@ static void damon_hugetlb_mkold(pte_t *pte, struct mm_struct *mm,
 {
 	bool referenced = false;
 	pte_t entry = huge_ptep_get(pte);
-	struct page *page = pte_page(entry);
+	struct folio *folio = pfn_folio(pte_pfn(entry));
 
-	get_page(page);
+	folio_get(folio);
 
 	if (pte_young(entry)) {
 		referenced = true;
@@ -352,10 +352,10 @@ static void damon_hugetlb_mkold(pte_t *pte, struct mm_struct *mm,
 #endif /* CONFIG_MMU_NOTIFIER */
 
 	if (referenced)
-		set_page_young(page);
+		folio_set_young(folio);
 
-	set_page_idle(page);
-	put_page(page);
+	folio_set_idle(folio);
+	folio_put(folio);
 }
 
 static int damon_mkold_hugetlb_entry(pte_t *pte, unsigned long hmask,
@@ -490,7 +490,7 @@ static int damon_young_hugetlb_entry(pte_t *pte, unsigned long hmask,
 {
 	struct damon_young_walk_private *priv = walk->private;
 	struct hstate *h = hstate_vma(walk->vma);
-	struct page *page;
+	struct folio *folio;
 	spinlock_t *ptl;
 	pte_t entry;
 
@@ -499,16 +499,16 @@ static int damon_young_hugetlb_entry(pte_t *pte, unsigned long hmask,
 	if (!pte_present(entry))
 		goto out;
 
-	page = pte_page(entry);
-	get_page(page);
+	folio = pfn_folio(pte_pfn(entry));
+	folio_get(folio);
 
-	if (pte_young(entry) || !page_is_idle(page) ||
+	if (pte_young(entry) || !folio_test_idle(folio) ||
 	    mmu_notifier_test_young(walk->mm, addr)) {
 		*priv->page_sz = huge_page_size(h);
 		priv->young = true;
 	}
 
-	put_page(page);
+	folio_put(folio);
 
 out:
 	spin_unlock(ptl);