linux-kernel - Re: [PATCH v2 6/9] rust: device: implement Bound device context

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Message-ID: <20250415204436.GA34981@bhelgaas>
Date: Tue, 15 Apr 2025 15:44:36 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Danilo Krummrich <dakr@...nel.org>
Cc: bhelgaas@...gle.com, kwilczynski@...nel.org, gregkh@...uxfoundation.org,
	rafael@...nel.org, abdiel.janulgue@...il.com, ojeda@...nel.org,
	alex.gaynor@...il.com, boqun.feng@...il.com, gary@...yguo.net,
	bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
	a.hindborg@...nel.org, aliceryhl@...gle.com, tmgross@...ch.edu,
	daniel.almeida@...labora.com, robin.murphy@....com,
	linux-pci@...r.kernel.org, rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/9] rust: device: implement Bound device context

On Sun, Apr 13, 2025 at 07:37:01PM +0200, Danilo Krummrich wrote:
> The Bound device context indicates that a device is bound to a driver.
> It must be used for APIs that require the device to be bound, such as
> Devres or dma::CoherentAllocation.
> 
> Implement Bound and add the corresponding Deref hierarchy, as well as the
> corresponding ARef conversion for this device context.
> 
> Signed-off-by: Danilo Krummrich <dakr@...nel.org>
> ---
>  rust/kernel/device.rs | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs
> index 487211842f77..585a3fcfeea3 100644
> --- a/rust/kernel/device.rs
> +++ b/rust/kernel/device.rs
> @@ -232,13 +232,19 @@ pub trait DeviceContext: private::Sealed {}
>  /// any of the bus callbacks, such as `probe()`.
>  pub struct Core;
>  
> +/// The [`Bound`] context is the context of a bus specific device reference when it is guranteed to
> +/// be bound for the duration of its lifetime.

s/guranteed/guaranteed/