linux-kernel - Re: [PATCH v6 03/14] rust: sync: add `Arc::as

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Message-ID: <CAJ-ks9=gKET-yaTkqta2TfTaxe031yKqnUHNXFjjJH_AYF2oqw@mail.gmail.com>
Date: Mon, 3 Feb 2025 17:46:42 -0500
From: Tamir Duberstein <tamird@...il.com>
To: Andreas Hindborg <a.hindborg@...nel.org>
Cc: Miguel Ojeda <ojeda@...nel.org>, Anna-Maria Behnsen <anna-maria@...utronix.de>, 
	Frederic Weisbecker <frederic@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Danilo Krummrich <dakr@...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 <benno.lossin@...ton.me>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, Lyude Paul <lyude@...hat.com>, Guangbo Cui <2407018371@...com>, 
	Dirk Behme <dirk.behme@...il.com>, Daniel Almeida <daniel.almeida@...labora.com>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 03/14] rust: sync: add `Arc::as_ptr`

On Thu, Jan 16, 2025 at 2:23 PM Andreas Hindborg <a.hindborg@...nel.org> wrote:
>
> "Tamir Duberstein" <tamird@...il.com> writes:
>
> > On Fri, Jan 10, 2025 at 3:19 PM Andreas Hindborg <a.hindborg@...nel.org> wrote:
> >>
> >> Add a method to get a pointer to the data contained in an `Arc`.
> >>
> >> Signed-off-by: Andreas Hindborg <a.hindborg@...nel.org>
> >
> > Can this mention why it is needed?
>
> I can add that after the cut. It is for impleminting `HrTimerPointer`
> for `Arc`.

The broader question is: why do we need to implement `/HrTimerPointer
` for `Arc`? Even broader is: why do we need to use raw pointers so
much?