[PATCH 2/2] ubifs: Allow O_DIRECT

[Christoph Hellwig]

On Mon, Aug 24, 2015 at 10:13:25AM +0300, Artem Bityutskiy wrote:
> 1. we are the only FS erroring out on O_DIRECT
> 2. other file-systems not supporting direct IO just fake it

There are lots of file systems not supporting O_DIRECT, but ubifs might
be the most common one.  Given that O_DIRECT implementations aren't
hard, so what's holding back a real implementation?