[Intel-gfx] [PATCH 3/9] relay: make create_buf_file and remove_buf_file callbacks mandatory

[Christoph Hellwig]

On Mon, Nov 23, 2020 at 07:59:23PM +0200, Jani Nikula wrote:
> All clients provide create_buf_file and remove_buf_file callbacks, and
> they're required for relay to make sense. There is no point in them
> being optional.
> 
> Also document whether each callback is mandatory/optional.

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>