linux-kernel - Re: [PATCH v5 00/26] Generic `Allocator` support for Rust

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Message-ID: <Zr31jqnA2b3qHK5l@cassiopeiae>
Date: Thu, 15 Aug 2024 14:33:18 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Boqun Feng <boqun.feng@...il.com>, ojeda@...nel.org,
	alex.gaynor@...il.com, wedsonaf@...il.com, gary@...yguo.net,
	bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
	a.hindborg@...sung.com, akpm@...ux-foundation.org,
	daniel.almeida@...labora.com, faith.ekstrand@...labora.com,
	boris.brezillon@...labora.com, lina@...hilina.net,
	mcanal@...lia.com, zhiw@...dia.com, cjia@...dia.com,
	jhubbard@...dia.com, airlied@...hat.com, ajanulgu@...hat.com,
	lyude@...hat.com, linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v5 00/26] Generic `Allocator` support for Rust

On Thu, Aug 15, 2024 at 11:20:32AM +0200, Alice Ryhl wrote:
> On Thu, Aug 15, 2024 at 4:52 AM Danilo Krummrich <dakr@...nel.org> wrote:
> >
> > On Wed, Aug 14, 2024 at 12:32:15PM -0700, Boqun Feng wrote:
> > > Hi Danilo,
> > >
> > > I'm trying to put your series on rust-dev, but I hit a few conflicts due
> > > to the conflict with `Box::drop_contents`, which has been in rust-dev
> > > for a while. And the conflict is not that trivial for me to resolve.
> > > So just a head-up, that's a requirement for me to put it on rust-dev for
> > > more tests from my end ;-)
> >
> > I rebased everything and you can fetch them from [1].
> >
> > I resolved the following conflicts:
> >
> >   - for `Box`, implement
> >     - `drop_contents`
> >     - `manually_drop_contents` [2]
> 
> Not sure I like this name. It sounds like something that runs the
> destructor, but it does the exact opposite.

I thought it kinda makes sense, since it's analogous to `ManuallyDrop::new`.

What about `Box::forget_contents` instead?

> 
> >     - ``move_out` [2]
> >     - `BorrowedMut` for `ForeignOwnable` for `Box<T, A>` and `Pin<Box<T, A>>`
> >     - `InPlaceWrite` and updated `InPlaceInit`
> >   - for `RBTreeNode`, make use of `Box::move_out` to replace the original
> >     implementation partially moving out of `Box`
> >
> > @Alice: Please have a look at the changes for `RBTreeNode`. Maybe it's also
> > worth having them in a separate patch.
> 
> RBTree changes LGTM.
> 
> Alice
>