[PATCH 30/31] block: store the holder in file->private_data

[Christoph Hellwig]

On Wed, Jun 07, 2023 at 11:24:55AM +0200, Christian Brauner wrote:
> On Tue, Jun 06, 2023 at 09:39:49AM +0200, Christoph Hellwig wrote:
> > Store the file struct used as the holder in file->private_data as an
> > indicator that this file descriptor was opened exclusively to  remove
> > the last use of FMODE_EXCL.
> > 
> > Signed-off-by: Christoph Hellwig <hch at lst.de>
> > ---
> 
> Feels a bit odd to store the object itself but anyway,
> Acked-by: Christian Brauner <brauner at kernel.org>

We could literally store anything we want.  The only reason I picked the
file is because: a) we have it around and b) that allows passing it
to blkdev_put without a branch in blkdev_release.

If you prefer something else I can change it.