ceph: convert writeback path to folios（v2 完整系列进展更新）

@@ -1467,29 +1476,28 @@ int ceph_submit_write(struct address_space *mapping,
 		BUG_ON(IS_ERR(req));
 	}
 
-	page = ceph_wbc->pages[ceph_wbc->locked_pages - 1];
-	BUG_ON(len < ceph_fscrypt_page_offset(page) + thp_size(page) - offset);
+	folio = page_folio(ceph_wbc->pages[ceph_wbc->locked_pages - 1]);
+	BUG_ON(len < ceph_fscrypt_folio_offset(folio) + folio_size(folio) - offset);
 
 	if (!ceph_inc_osd_stopping_blocker(fsc->mdsc)) {
 		for (i = 0; i < folio_batch_count(&ceph_wbc->fbatch); i++) {
-			struct folio *folio = ceph_wbc->fbatch.folios[i];
+			folio = ceph_wbc->fbatch.folios[i];
 
 			if (!folio)
 				continue;
 
-			page = &folio->page;
-			redirty_page_for_writepage(wbc, page);
-			unlock_page(page);
+			folio_redirty_for_writepage(wbc, folio);
+			folio_unlock(folio);
 		}
 
 		for (i = 0; i < ceph_wbc->locked_pages; i++) {
-			page = ceph_fscrypt_pagecache_page(ceph_wbc->pages[i]);
+			folio = ceph_fscrypt_pagecache_folio(page_folio(ceph_wbc->pages[i]));
 
-			if (!page)
+			if (!folio)
 				continue;
 
-			redirty_page_for_writepage(wbc, page);
-			unlock_page(page);
+			folio_redirty_for_writepage(wbc, folio);
+			folio_unlock(folio);
 		}

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 485df9c2dbdd..48e821454ca0 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1966,27 +1966,6 @@ static inline unsigned int page_shift(struct page *page)
 	return PAGE_SHIFT + compound_order(page);
 }
 
-/**
- * thp_order - Order of a transparent huge page.
- * @page: Head page of a transparent huge page.
- */
-static inline unsigned int thp_order(struct page *page)
-{
-	VM_BUG_ON_PGFLAGS(PageTail(page), page);
-	return compound_order(page);
-}
-
-/**
- * thp_size - Size of a transparent huge page.
- * @page: Head page of a transparent huge page.
- *
- * Return: Number of bytes in this page.
- */
-static inline unsigned long thp_size(struct page *page)
-{
-	return PAGE_SIZE << thp_order(page);
-}
-
 #ifdef CONFIG_MMU
 /*
  * Do pte_mkwrite, but only if the vma says VM_WRITE.  We do this when