Re: [PATCH v2 5/6] esp_scsi: De-duplicate PIO routines

[Christoph Hellwig]

On Mon, Oct 15, 2018 at 12:58:42PM +0200, Hannes Reinecke wrote:
> However, the function declaration really is a worry, as the actual function
> body only exists when the config option is enabled.

Having a prototype without an implementation is no problem at all.
We have this case all over the kernel, either intentionally to keep
things simple or due to bitrot.