linux-kernel - Re: [PATCH 1/6] gpu: nova-core: print FB sizes, along with ranges

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Message-ID: <03562a7e-bbf0-4e85-a562-33cdedea0b1f@nvidia.com>
Date: Tue, 18 Nov 2025 23:36:38 -0800
From: John Hubbard <jhubbard@...dia.com>
To: Alexandre Courbot <acourbot@...dia.com>,
 Danilo Krummrich <dakr@...nel.org>
Cc: Joel Fernandes <joelagnelf@...dia.com>, Timur Tabi <ttabi@...dia.com>,
 Alistair Popple <apopple@...dia.com>, Edwin Peer <epeer@...dia.com>,
 Zhi Wang <zhiw@...dia.com>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Bjorn Helgaas <bhelgaas@...gle.com>,
 Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>,
 Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>,
 Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>,
 Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
 nouveau@...ts.freedesktop.org, rust-for-linux@...r.kernel.org,
 LKML <linux-kernel@...r.kernel.org>,
 Nouveau <nouveau-bounces@...ts.freedesktop.org>
Subject: Re: [PATCH 1/6] gpu: nova-core: print FB sizes, along with ranges

On 11/18/25 11:33 PM, Alexandre Courbot wrote:
> On Thu Nov 6, 2025 at 12:54 PM JST, John Hubbard wrote:
...
> And with this new type, we can also address one another shortcoming that
> was bugging me! In e.g. `boot.rs` we have this ugly bit:
> 
>          frts_size: fb_layout.frts.end - fb_layout.frts.start,
> 
> What we want is a `len` method, but since our range uses u64, and `len`
> returns a `usize`, standard Rust doesn't provide one for us. But thanks
> to this dedicated type we can now implement our own! :)
> 
> Not saying this has to be done in this patch though, but it's a nice
> side-effect.

This all sounds good, I'll do it, thanks for the ideas and most of
the implementation too. :)

thanks,
-- 
John Hubbard