re-enable IOCB_NOWAIT writes to files

[Christoph Hellwig]

On Fri, Nov 14, 2025 at 09:04:58AM -0500, Jeff Layton wrote:
> This all looks pretty reasonable to me. There are a few changelog and
> subject line typos, but the code changes look fine. You can add:

Please tell me about them so I can fix them. 

> As far as nfsd's usage of FMODE_NOCMTIME, it looks OK to me. That's
> implemented today by the check in file_modified_flags(), which is
> generic and should work across filesystems.

Nothing requires file_update_time / file_modified_flags are helpers
that a file system may or may not call.  I've not done an audit
if everyone actually uses them.