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From: Andreas Hindborg <a.hindborg@kernel.org>
To: Alvin Sun <alvin.sun@linux.dev>, Miguel Ojeda <ojeda@kernel.org>, Boqun
 Feng <boqun@kernel.org>, Gary Guo <gary@garyguo.net>, =?utf-8?Q?Bj=C3=B6r?=
 =?utf-8?Q?n?= Roy Baron
 <bjorn3_gh@protonmail.com>, Benno Lossin <lossin@kernel.org>, Alice Ryhl
 <aliceryhl@google.com>, Trevor Gross <tmgross@umich.edu>, Danilo Krummrich
 <dakr@kernel.org>, Lorenzo Stoakes <ljs@kernel.org>, "Liam R. Howlett"
 <Liam.Howlett@oracle.com>, Tamir Duberstein <tamird@kernel.org>
Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-mm@kvack.org, Onur =?utf-8?Q?=C3=96zkan?= <work@onurozkan.dev>, Alvin
 Sun
 <alvin.sun@linux.dev>
Subject: Re: [PATCH 4/4] rust: xarray: Add Guard::find() helper
In-Reply-To: <20260417-tyr-ioctls-deps-v1-4-41c6e9bb061c@linux.dev>
References: <20260417-tyr-ioctls-deps-v1-0-41c6e9bb061c@linux.dev>
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 <20260417-tyr-ioctls-deps-v1-4-41c6e9bb061c@linux.dev>
Date: Fri, 24 Apr 2026 13:42:06 +0200
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"Alvin Sun" <alvin.sun@linux.dev> writes:

> Add a helper to find the first present entry in the XArray.
>
> Returns the index of the first present entry, or None if the array
> is empty.
>
> Signed-off-by: Alvin Sun <alvin.sun@linux.dev>

I submitted a similar patch a while back as part of the dependencies for
rust null block [1]. Could you check if you could use this patch for
your use case?

Best regards,
Andreas Hindborg


[1] https://lore.kernel.org/all/20260209-xarray-entry-send-v3-7-f777c65b8ae2@kernel.org/