Re: Loop devices under NTFS

[Christoph Hellwig]

On Tue, Aug 27, 2002 at 05:40:52AM -0700, Adam J. Richter wrote:
> 	There are only a few file systems that provide writable files
> without aops->{prepare,commit}_write.  I think they are just tmpfs,
> ntfs and intermezzo.  If all file systems that provided writable files
> could be expected to provide {prepare,commit}_write, I could eliminate
> the file_ops->{read,write} code from loop.c.

This is the wrong level of abstraction.  There is no reason why a filesystem
has to use the pagecache at all.

Note that there is a more severe bug in loop.c:  it's abuse of
do_generic_file_read.