On Mon, Nov 22, 2021 at 11:21:52PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > I recently came across some new uses of the 'slave_id' field that > I had (almost) removed a few years ago. There are no legitimate > uses of this field in the kernel, only a few stale references and > two drivers that abuse the field as a side-channel between the > dmaengine driver and its client. Acked-by: Mark Brown