linux-kernel - Re: [PATCH 2/5] rust: device: Add a minimal RawDevice trait

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Message-ID: <bbc824ee-ef4e-40cb-f009-0d693d757869@asahilina.net>
Date:   Fri, 24 Feb 2023 23:44:59 +0900
From:   Asahi Lina <lina@...hilina.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>, Arnd Bergmann <arnd@...db.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Neal Gompa <neal@...pa.dev>, rust-for-linux@...r.kernel.org,
        linux-kernel@...r.kernel.org, asahi@...ts.linux.dev
Subject: Re: [PATCH 2/5] rust: device: Add a minimal RawDevice trait

On 2023/02/24 23:19, Greg Kroah-Hartman wrote:>> Can we see some users
of this code posted so I can see how struct device
>> is going to work in a rust driver?  That's the thing I worry most about
>> the rust/C interaction here as we have two different ways of thinking
>> about reference counts from the two worlds and putting them together is
>> going to be "interesting", as can be seen here already.
> 
> Also, where are you getting your 'struct device' from in the first
> place?  What bus is createing it and giving it to your rust driver?

That would be platform for my GPU driver, matched via OF compatible.

~~ Lina