Subject: [PATCH 04/10] ext2: Convert ext2_readdir to use a folio

From: "Matthew Wilcox (Oracle)" <[email-masked]>
Date: Thu, 21 Sep 2023 12:39:32 -0400

Saves a hidden call to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <[email-masked]>
---
 fs/ext2/dir.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 5c1b7bded535..5a8a02d6be9a 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -286,8 +286,8 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 
 	for ( ; n < npages; n++, offset = 0) {
 		ext2_dirent *de;
-		struct page *page;
-		char *kaddr = ext2_get_page(inode, n, 0, &page);
+		struct folio *folio;
+		char *kaddr = ext2_get_folio(inode, n, 0, &folio);
 		char *limit;
 
 		if (IS_ERR(kaddr)) {
@@ -311,7 +311,7 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 			if (de->rec_len == 0) {
 				ext2_error(sb, __func__,
 					"zero-length directory entry");
-				ext2_put_page(page, de);
+				folio_release_kmap(folio, de);
 				return -EIO;
 			}
 			if (de->inode) {
@@ -323,13 +323,13 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 				if (!dir_emit(ctx, de->name, de->name_len,
 						le32_to_cpu(de->inode),
 						d_type)) {
-					ext2_put_page(page, de);
+					folio_release_kmap(folio, de);
 					return 0;
 				}
 			}
 			ctx->pos += ext2_rec_len_from_disk(de->rec_len);
 		}
-		ext2_put_page(page, kaddr);
+		folio_release_kmap(folio, kaddr);
 	}
 	return 0;
 }
-- 
2.40.1