linux-kernel - Re: [PATCH v2 5/5] rust: maple

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Message-ID: <5ssx3vakl3enjeaygpxfqtb26ufehwfjvcwqfna4xbhc645xpj@lzuvaf3my3f6>
Date: Tue, 19 Aug 2025 09:36:10 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: Alice Ryhl <aliceryhl@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Andrew Ballance <andrewjballance@...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>,
        Trevor Gross <tmgross@...ch.edu>, linux-kernel@...r.kernel.org,
        maple-tree@...ts.infradead.org, rust-for-linux@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH v2 5/5] rust: maple_tree: add MAINTAINERS entry

* Danilo Krummrich <dakr@...nel.org> [250819 07:49]:
> On Tue Aug 19, 2025 at 12:34 PM CEST, Alice Ryhl wrote:
> > Similar to and just below the existing MAPLE TREE entry.
> >
> > Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
> > ---
> > Liam: I'm not sure what you prefer for the MAINTAINERS entry, so let me
> > know if you want anything changed. There are also a few other options,
> > for example, I could just add the files under the existing MAPLE TREE
> > entry? The get_maintainers script should still send any relevant patches
> > my way because they also match the RUST entry that has a wildcard on the
> > rust/ directory.
> 
> From v1 [1]:
> 
> 	>> We should have another section for the maple tree, since it's not just
> 	>> used for mm.  Your stated plan is to use it for GPU allocations and the
> 	>> code doesn't live in mm/, wdyt?
> 	
> 	> Sure, I can add a new section if you prefer that.
> 
> Maple tree is already used outside of mm, e.g. for regmap stuff and I also use
> it in nouveau. Hence, I read this as moving maple tree to e.g. lib/ adjusting
> the existing entry.
> 
> I personally think that - of course unless the affected people prefer otherwise
> - it is usually best to keep a single maintainers entry for the C and the Rust
> code. Maybe Alice can simply be added to the existing maintainers entry?
> 
> What do you think?

I'm not sure what you mean by lib/ since the lib files are spread into
other entries by the looks of it?

I'm okay with the entry below or adjusting the existing one.

> 
> [1] https://lore.kernel.org/all/aJW3L3SEVUl_AVvN@google.com/
> 
> > Which tree does maple tree patches usually land through?
> >
> > Andrew Ballance: You mentioned being interested in being listed here as
> > well?
> > ---
> >  MAINTAINERS | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 26053163fe5aed2fc4b4e39d47062c93b873ac13..4a52d884e36eafe1c819227207123c51caf02ee5 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -14674,6 +14674,16 @@ F:	lib/test_maple_tree.c
> >  F:	tools/testing/radix-tree/maple.c
> >  F:	tools/testing/shared/linux/maple_tree.h
> >  
> > +MAPLE TREE [RUST]
> > +M:	Liam R. Howlett <Liam.Howlett@...cle.com>
> > +M:	Alice Ryhl <aliceryhl@...gle.com>
> > +L:	maple-tree@...ts.infradead.org
> > +L:	linux-mm@...ck.org
> > +L:	rust-for-linux@...r.kernel.org
> > +S:	Supported
> > +F:	rust/helpers/maple_tree.c
> > +F:	rust/kernel/maple_tree.rs
> > +
> >  MARDUK (CREATOR CI40) DEVICE TREE SUPPORT
> >  M:	Rahul Bedarkar <rahulbedarkar89@...il.com>
> >  L:	linux-mips@...r.kernel.org
> >
> > -- 
> > 2.51.0.rc1.167.g924127e9c0-goog
> 
>