linux-kernel - Re: [PATCH 5/5] samples: rust_misc_device: Expand the sample to support read()ing from userspace

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Message-ID: <87bjtwg4rf.fsf@kernel.org>
Date: Wed, 19 Mar 2025 21:11:16 +0100
From: Andreas Hindborg <a.hindborg@...nel.org>
To: "Alice Ryhl" <aliceryhl@...gle.com>
Cc: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,  "Alexander Viro"
 <viro@...iv.linux.org.uk>,  "Arnd Bergmann" <arnd@...db.de>,  "Miguel
 Ojeda" <ojeda@...nel.org>,  "Boqun Feng" <boqun.feng@...il.com>,  "Gary
 Guo" <gary@...yguo.net>,  Björn Roy Baron
 <bjorn3_gh@...tonmail.com>,
  "Benno Lossin" <benno.lossin@...ton.me>,  "Trevor Gross"
 <tmgross@...ch.edu>,  "Danilo Krummrich" <dakr@...nel.org>,  "Matthew
 Maurer" <mmaurer@...gle.com>,  "Lee Jones" <lee@...nel.org>,
  <linux-kernel@...r.kernel.org>,  <rust-for-linux@...r.kernel.org>
Subject: Re: [PATCH 5/5] samples: rust_misc_device: Expand the sample to
 support read()ing from userspace

"Alice Ryhl" <aliceryhl@...gle.com> writes:

> From: Lee Jones <lee@...nel.org>
>
> A userland application can now operate on the char device with read() in
> order to consume a locally held buffer.  Memory for the buffer is to be
> provisioned and the buffer populated in its subsequently provided
> write() counterpart.
>
> Signed-off-by: Lee Jones <lee@...nel.org>
> Co-developed-by: Alice Ryhl <aliceryhl@...gle.com>
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>


Reviewed-by: Andreas Hindborg <a.hindborg@...nel.org>


Best regards,
Andreas Hindborg