netdev - Re: [PATCH net-next v7 1/5] rust: core abstractions for network PHY drivers

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Message-ID: <c8d6d56f-bd8f-4d2c-a95a-4ed11bf952b8@lunn.ch>
Date: Sun, 29 Oct 2023 20:39:44 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Boqun Feng <boqun.feng@...il.com>
Cc: FUJITA Tomonori <fujita.tomonori@...il.com>, benno.lossin@...ton.me,
	netdev@...r.kernel.org, rust-for-linux@...r.kernel.org,
	tmgross@...ch.edu, miguel.ojeda.sandonis@...il.com,
	wedsonaf@...il.com
Subject: Re: [PATCH net-next v7 1/5] rust: core abstractions for network PHY
 drivers

> Of course, it's not maintainable in longer term since it relies on
> hard-coding the bit offset of these bit fields. But I think it's best we
> can do from Linux kernel side. It's up to Andrew and Miguel whether this
> temporary solution is OK.

What is the likely time scale for getting a new version of bindgen
with the necessary bit field support?

We have probably missed the merge window for v6.7. So there is around
9 weeks to the next merge window. If a working bindgen is likely to be
available by then, we should not bother with a workaround, just wait.

If you think bindgen is going to take longer than that, then we should
consider workarounds. But we have no rush, its still 9 weeks before we
need working code.

Zooming out a bit. Is there any other in mainline Rust code, or about
to be submitted for this merge window code, using bit fields? I assume
that is equally broken?

	Andrew