+ Functions which return ENOENT: access, stat
+
+
+
+ WARNING-the function yaffs_open does not check the mode passed to it.
+ This means that yaffs open does not return EINVAL if a bad mode is passed to it.
+ However this causes the error EEXIST to happen instead, because both O_CREAT and O_EXCL flags are set.
+
+ WARNING- yaffs_open will work with either of the two mode set to 255.
+ However there are only 4 or 5 flags that can be set for each of the modes.
+ This means that the programmer may not be setting the flags properly.
+
+ WARNING- When mounting a non-existing mount point the error ENODEV is returned.
+ The quick tests have been altered to accommodate this error code.
+ With standard access function in linux the error returned is ENOENT.