Re: [PATCH v5 00/12] vfio, dax: prevent long term filesystem-dax pins and other fixes

[Dan Williams]

On Fri, Mar 2, 2018 at 2:57 PM, Christoph Hellwig <hch@xxxxxx> wrote:
> On Fri, Mar 02, 2018 at 02:21:40PM -0800, Dan Williams wrote:
>> They are indeed a hodge-podge. The problem is that the current
>> IS_DAX() is broken. So I'd like to propose fixing IS_DAX() with
>> IS_FSDAX() + IS_DEVDAX() for 4.16-rc4 and queue up these wider reworks
>> you propose for the next merge window.
>
> The only thing broken about IS_DAX are the code elimination games
> based on the CONFIG_* flags.  Remove those and just add proper stubs
> for the dax routines and everything will be fine for now until we can
> kill that inode flag.
>
> IS_FSDAX and IS_DEVDAX on the other hand are a giant mess that isn't
> helping anyone.

Ok, I'll take another shot at something suitable for 4.16, but without
these new helpers...