NFS: Rename readpage_async_filler to nfs_read_add_folio

Rename readpage_async_filler to nfs_read_add_folio to
better reflect what this function does (add a folio to
the nfs_pageio_descriptor), and simplify arguments to
this function by removing struct nfs_readdesc.
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Tested-by: Daire Byrne <daire@dneg.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/read.c

@@ -127,11 +127,6 @@ static void nfs_readpage_release(struct nfs_page *req, int error)
 	nfs_release_request(req);
 }
 
-struct nfs_readdesc {
-	struct nfs_pageio_descriptor pgio;
-	struct nfs_open_context *ctx;
-};
-
 static void nfs_page_group_set_uptodate(struct nfs_page *req)
 {
 	if (nfs_page_group_sync_on_bit(req, PG_UPTODATE))
@@ -153,7 +148,8 @@ static void nfs_read_completion(struct nfs_pgio_header *hdr)
 
 		if (test_bit(NFS_IOHDR_EOF, &hdr->flags)) {
 			/* note: regions of the page not covered by a
-			 * request are zeroed in readpage_async_filler */
+			 * request are zeroed in nfs_read_add_folio
+			 */
 			if (bytes > hdr->good_bytes) {
 				/* nothing in this request was good, so zero
 				 * the full extent of the request */
@@ -281,7 +277,9 @@ static void nfs_readpage_result(struct rpc_task *task,
 		nfs_readpage_retry(task, hdr);
 }
 
-static int readpage_async_filler(struct nfs_readdesc *desc, struct folio *folio)
+static int nfs_read_add_folio(struct nfs_pageio_descriptor *pgio,
+			      struct nfs_open_context *ctx,
+			      struct folio *folio)
 {
 	struct inode *inode = folio_file_mapping(folio)->host;
 	struct nfs_server *server = NFS_SERVER(inode);
@@ -303,15 +301,15 @@ static int readpage_async_filler(struct nfs_readdesc *desc, struct folio *folio)
 			goto out_unlock;
 	}
 
-	new = nfs_page_create_from_folio(desc->ctx, folio, 0, aligned_len);
+	new = nfs_page_create_from_folio(ctx, folio, 0, aligned_len);
 	if (IS_ERR(new))
 		goto out_error;
 
 	if (len < fsize)
 		folio_zero_segment(folio, len, fsize);
-	if (!nfs_pageio_add_request(&desc->pgio, new)) {
+	if (!nfs_pageio_add_request(pgio, new)) {
 		nfs_list_remove_request(new);
-		error = desc->pgio.pg_error;
+		error = pgio->pg_error;
 		nfs_readpage_release(new, error);
 		goto out;
 	}
@@ -332,8 +330,9 @@ static int readpage_async_filler(struct nfs_readdesc *desc, struct folio *folio)
  */
 int nfs_read_folio(struct file *file, struct folio *folio)
 {
-	struct nfs_readdesc desc;
 	struct inode *inode = file_inode(file);
+	struct nfs_pageio_descriptor pgio;
+	struct nfs_open_context *ctx;
 	int ret;
 
 	trace_nfs_aop_readpage(inode, folio);
@@ -357,25 +356,25 @@ int nfs_read_folio(struct file *file, struct folio *folio)
 	if (NFS_STALE(inode))
 		goto out_unlock;
 
-	desc.ctx = get_nfs_open_context(nfs_file_open_context(file));
+	ctx = get_nfs_open_context(nfs_file_open_context(file));
 
-	xchg(&desc.ctx->error, 0);
-	nfs_pageio_init_read(&desc.pgio, inode, false,
+	xchg(&ctx->error, 0);
+	nfs_pageio_init_read(&pgio, inode, false,
 			     &nfs_async_read_completion_ops);
 
-	ret = readpage_async_filler(&desc, folio);
+	ret = nfs_read_add_folio(&pgio, ctx, folio);
 	if (ret)
 		goto out;
 
-	nfs_pageio_complete_read(&desc.pgio);
-	ret = desc.pgio.pg_error < 0 ? desc.pgio.pg_error : 0;
+	nfs_pageio_complete_read(&pgio);
+	ret = pgio.pg_error < 0 ? pgio.pg_error : 0;
 	if (!ret) {
 		ret = folio_wait_locked_killable(folio);
 		if (!folio_test_uptodate(folio) && !ret)
-			ret = xchg(&desc.ctx->error, 0);
+			ret = xchg(&ctx->error, 0);
 	}
 out:
-	put_nfs_open_context(desc.ctx);
+	put_nfs_open_context(ctx);
 	trace_nfs_aop_readpage_done(inode, folio, ret);
 	return ret;
 out_unlock:
@@ -386,9 +385,10 @@ int nfs_read_folio(struct file *file, struct folio *folio)
 
 void nfs_readahead(struct readahead_control *ractl)
 {
+	struct nfs_pageio_descriptor pgio;
+	struct nfs_open_context *ctx;
 	unsigned int nr_pages = readahead_count(ractl);
 	struct file *file = ractl->file;
-	struct nfs_readdesc desc;
 	struct inode *inode = ractl->mapping->host;
 	struct folio *folio;
 	int ret;
@@ -403,24 +403,24 @@ void nfs_readahead(struct readahead_control *ractl)
 
 	if (file == NULL) {
 		ret = -EBADF;
-		desc.ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
-		if (desc.ctx == NULL)
+		ctx = nfs_find_open_context(inode, NULL, FMODE_READ);
+		if (ctx == NULL)
 			goto out;
 	} else
-		desc.ctx = get_nfs_open_context(nfs_file_open_context(file));
+		ctx = get_nfs_open_context(nfs_file_open_context(file));
 
-	nfs_pageio_init_read(&desc.pgio, inode, false,
+	nfs_pageio_init_read(&pgio, inode, false,
 			     &nfs_async_read_completion_ops);
 
 	while ((folio = readahead_folio(ractl)) != NULL) {
-		ret = readpage_async_filler(&desc, folio);
+		ret = nfs_read_add_folio(&pgio, ctx, folio);
 		if (ret)
 			break;
 	}
 
-	nfs_pageio_complete_read(&desc.pgio);
+	nfs_pageio_complete_read(&pgio);
 
-	put_nfs_open_context(desc.ctx);
+	put_nfs_open_context(ctx);
 out:
 	trace_nfs_aop_readahead_done(inode, nr_pages, ret);
 }