--- zzzz-none-000/linux-3.10.107/fs/bfs/file.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/bfs/file.c	2021-02-04 17:41:59.000000000 +0000
@@ -23,10 +23,8 @@
 
 const struct file_operations bfs_file_operations = {
 	.llseek 	= generic_file_llseek,
-	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
-	.write		= do_sync_write,
-	.aio_write	= generic_file_aio_write,
+	.read_iter	= generic_file_read_iter,
+	.write_iter	= generic_file_write_iter,
 	.mmap		= generic_file_mmap,
 	.splice_read	= generic_file_splice_read,
 };
@@ -166,7 +164,7 @@
 	struct inode *inode = mapping->host;
 
 	if (to > inode->i_size)
-		truncate_pagecache(inode, to, inode->i_size);
+		truncate_pagecache(inode, inode->i_size);
 }
 
 static int bfs_write_begin(struct file *file, struct address_space *mapping,