linux-kernel - Re: [PATCH 3/3] rust: miscdevice: adjust the rust_misc

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Message-ID: <7a84da97-504c-4d1f-9c98-3a152e348c73@gmail.com>
Date: Thu, 23 Jan 2025 18:57:56 +0100
From: Christian Schrefl <chrisi.schrefl@...il.com>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Miguel Ojeda <ojeda@...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>,
 Andreas Hindborg <a.hindborg@...nel.org>, Trevor Gross <tmgross@...ch.edu>,
 Arnd Bergmann <arnd@...db.de>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Lee Jones <lee@...nel.org>,
 rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] rust: miscdevice: adjust the rust_misc_device sample
 to use RegistrationData.

Hi Alice

On 21.01.25 4:40 PM, Alice Ryhl wrote:
> On Sun, Jan 19, 2025 at 11:11 PM Christian Schrefl
> <chrisi.schrefl@...il.com> wrote:
>>
>> Share the mutex stored in RustMiscDevice between all instances using an Arc
>> and the RegistrationData of MiscDeviceRegistration.
>>
>> This is mostly to Demonstrate the capability to share data in this way.
>>
>> Signed-off-by: Christian Schrefl <chrisi.schrefl@...il.com>
> 
> This change causes all open files to share the same value, instead of
> it being per-fd.

I know, if that is unwanted I'm fine with dropping this patch,
it is mostly here to show how patch 2 can be used.

> 
> Alice

Cheers
Christian