disable large folios for shmem file used by xfs xfile

[Andrew Morton]

On Wed, 10 Jan 2024 10:21:07 +0100 Christoph Hellwig <hch at lst.de> wrote:

> Hi all,
> 
> Darrick reported that the fairly new XFS xfile code blows up when force
> enabling large folio for shmem.  This series fixes this quickly by disabling
> large folios for this particular shmem file for now until it can be fixed
> properly, which will be a lot more invasive.
> 

Patches seems reasonable as a short-term only-affects-xfs thing.

I assume that kernels which contain 137db333b29186 ("xfs: teach xfile
to pass back direct-map pages to caller") want this, so a Fixes: that
and a cc:stable are appropriate?