1 files changed, 16 insertions, 27 deletions

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index fc3a8d8064f8..64b56c7df023 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -265,7 +265,7 @@ submit_bio_out:
  */
 static int erofs_raw_access_readpage(struct file *file, struct page *page)
 {
-	erofs_off_t last_block;
+	erofs_off_t uninitialized_var(last_block);
 	struct bio *bio;
 
 	trace_erofs_readpage(page, true);
@@ -280,47 +280,36 @@ static int erofs_raw_access_readpage(struct file *file, struct page *page)
 	return 0;
 }
 
-static int erofs_raw_access_readpages(struct file *filp,
-				      struct address_space *mapping,
-				      struct list_head *pages,
-				      unsigned int nr_pages)
+static void erofs_raw_access_readahead(struct readahead_control *rac)
 {
-	erofs_off_t last_block;
+	erofs_off_t uninitialized_var(last_block);
 	struct bio *bio = NULL;
-	gfp_t gfp = readahead_gfp_mask(mapping);
-	struct page *page = list_last_entry(pages, struct page, lru);
-
-	trace_erofs_readpages(mapping->host, page, nr_pages, true);
+	struct page *page;
 
-	for (; nr_pages; --nr_pages) {
-		page = list_entry(pages->prev, struct page, lru);
+	trace_erofs_readpages(rac->mapping->host, readahead_index(rac),
+			readahead_count(rac), true);
 
+	while ((page = readahead_page(rac))) {
 		prefetchw(&page->flags);
-		list_del(&page->lru);
 
-		if (!add_to_page_cache_lru(page, mapping, page->index, gfp)) {
-			bio = erofs_read_raw_page(bio, mapping, page,
-						  &last_block, nr_pages, true);
+		bio = erofs_read_raw_page(bio, rac->mapping, page, &last_block,
+				readahead_count(rac), true);
 
-			/* all the page errors are ignored when readahead */
-			if (IS_ERR(bio)) {
-				pr_err("%s, readahead error at page %lu of nid %llu\n",
-				       __func__, page->index,
-				       EROFS_I(mapping->host)->nid);
+		/* all the page errors are ignored when readahead */
+		if (IS_ERR(bio)) {
+			pr_err("%s, readahead error at page %lu of nid %llu\n",
+			       __func__, page->index,
+			       EROFS_I(rac->mapping->host)->nid);
 
-				bio = NULL;
-			}
+			bio = NULL;
 		}
 
-		/* pages could still be locked */
 		put_page(page);
 	}
-	DBG_BUGON(!list_empty(pages));
 
 	/* the rare case (end in gaps) */
 	if (bio)
 		submit_bio(bio);
-	return 0;
 }
 
 static int erofs_get_block(struct inode *inode, sector_t iblock,
@@ -358,7 +347,7 @@ static sector_t erofs_bmap(struct address_space *mapping, sector_t block)
 /* for uncompressed (aligned) files and raw access for other files */
 const struct address_space_operations erofs_raw_access_aops = {
 	.readpage = erofs_raw_access_readpage,
-	.readpages = erofs_raw_access_readpages,
+	.readahead = erofs_raw_access_readahead,
 	.bmap = erofs_bmap,
 };