[PATCH 16/31] block: use the holder as indication for exclusive opens

[Christian Brauner]

On Tue, Jun 06, 2023 at 09:39:35AM +0200, Christoph Hellwig wrote:
> The current interface for exclusive opens is rather confusing as it
> requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
> FMODE_EXCL and just key off the exclusive open off a non-NULL holder.
> 
> For blkdev_put this requires adding the holder argument, which provides
> better debug checking that only the holder actually releases the hold,
> but at the same time allows removing the now superfluous mode argument.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---

Looks good to me,
Acked-by: Christian Brauner <brauner at kernel.org>