f2fs: Convert to release_folio

While converting f2fs_release_page() to f2fs_release_folio(), cache the
sb_info so we don't need to retrieve it twice, and remove the redundant
call to set_page_private(). The use of folios should be pushed further
into f2fs from here.

Signed-off-by: Matthew Wilcox (Oracle) <[e-mail]>
Reviewed-by: Jeff Layton <[e-mail]>

fs/f2fs/checkpoint.c

···
 	.writepages	= f2fs_write_meta_pages,
 	.dirty_folio	= f2fs_dirty_meta_folio,
 	.invalidate_folio = f2fs_invalidate_folio,
-	.releasepage	= f2fs_release_page,
+	.release_folio	= f2fs_release_folio,
 #ifdef CONFIG_MIGRATION
 	.migratepage    = f2fs_migrate_page,
 #endif

fs/f2fs/compress.c

···
 }
 
 const struct address_space_operations f2fs_compress_aops = {
-	.releasepage = f2fs_release_page,
+	.release_folio = f2fs_release_folio,
 	.invalidate_folio = f2fs_invalidate_folio,
 };
 

fs/f2fs/data.c

···
 	folio_detach_private(folio);
 }
 
-int f2fs_release_page(struct page *page, gfp_t wait)
+bool f2fs_release_folio(struct folio *folio, gfp_t wait)
 {
-	/* If this is dirty page, keep PagePrivate */
-	if (PageDirty(page))
-		return 0;
+	struct f2fs_sb_info *sbi;
+
+	/* If this is dirty folio, keep private data */
+	if (folio_test_dirty(folio))
+		return false;
 
 	/* This is atomic written page, keep Private */
-	if (page_private_atomic(page))
-		return 0;
+	if (page_private_atomic(&folio->page))
+		return false;
 
-	if (test_opt(F2FS_P_SB(page), COMPRESS_CACHE)) {
-		struct inode *inode = page->mapping->host;
+	sbi = F2FS_M_SB(folio->mapping);
+	if (test_opt(sbi, COMPRESS_CACHE)) {
+		struct inode *inode = folio->mapping->host;
 
-		if (inode->i_ino == F2FS_COMPRESS_INO(F2FS_I_SB(inode)))
-			clear_page_private_data(page);
+		if (inode->i_ino == F2FS_COMPRESS_INO(sbi))
+			clear_page_private_data(&folio->page);
 	}
 
-	clear_page_private_gcing(page);
+	clear_page_private_gcing(&folio->page);
 
-	detach_page_private(page);
-	set_page_private(page, 0);
-	return 1;
+	folio_detach_private(folio);
+	return true;
 }
 
 static bool f2fs_dirty_data_folio(struct address_space *mapping,
···
 	.write_end	= f2fs_write_end,
 	.dirty_folio	= f2fs_dirty_data_folio,
 	.invalidate_folio = f2fs_invalidate_folio,
-	.releasepage	= f2fs_release_page,
+	.release_folio	= f2fs_release_folio,
 	.direct_IO	= noop_direct_IO,
 	.bmap		= f2fs_bmap,
 	.swap_activate  = f2fs_swap_activate,

fs/f2fs/f2fs.h

···
 				int compr_blocks, bool allow_balance);
 void f2fs_write_failed(struct inode *inode, loff_t to);
 void f2fs_invalidate_folio(struct folio *folio, size_t offset, size_t length);
-int f2fs_release_page(struct page *page, gfp_t wait);
+bool f2fs_release_folio(struct folio *folio, gfp_t wait);
 #ifdef CONFIG_MIGRATION
 int f2fs_migrate_page(struct address_space *mapping, struct page *newpage,
 			struct page *page, enum migrate_mode mode);

fs/f2fs/node.c

···
 	.writepages	= f2fs_write_node_pages,
 	.dirty_folio	= f2fs_dirty_node_folio,
 	.invalidate_folio = f2fs_invalidate_folio,
-	.releasepage	= f2fs_release_page,
+	.release_folio	= f2fs_release_folio,
 #ifdef CONFIG_MIGRATION
 	.migratepage	= f2fs_migrate_page,
 #endif