Re: [PATCH 00/17] Rust support

From: Wedson Almeida Filho
Date: Thu Jul 22 2021 - 18:56:08 EST

Hey Matthew,

On Thu, Jul 08, 2021 at 01:58:32AM +0100, Matthew Wilcox wrote:
> Why are you so resistant to writing a real driver that deals with actual
> hardware?

I don't think it was so much resistance but rather a prioritisation thing. Have
you by any chance seen the gpio driver I posted a couple of days ago?

> A simple NVMe driver is less than a thousand lines of C.
> I know the one in the kernel now is ridiculously complicated and has
> been thoroughly messed up with abstractions to support NVMeoF instead
> of having a separate driver, but it's really a simple interface at heart.

The latest NVMe spec is 452 pages long, which seems to contradict your claim
that it's simple. In any case, translating less than 1K lines of C shouldn't be
too hard (after I've built the abstractions, of course). Would you mind sharing
the simple driver you mention above?