Re: [PATCH v6 4/6] dax: add DAX_RECOVERY flag and .recovery_write dev_pgmap_ops

[Christoph Hellwig]

On Wed, Mar 23, 2022 at 06:43:06PM +0000, Jane Chu wrote:
> > it onto ->direct_access.  But nothing in this series actually checks
> > for it as far as I can tell.
> 
> The flag is checked here, again, I'll spell out the flag rather than 
> using it as a boolean.

Yes.  The whole point of a flags value is that it is extensible..