linux-kernel - Re: [PATCH v3 2/5] Documentation: ioctl-number: Carve out some identifiers for use by sample drivers

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Message-ID: <2024120656-tuition-freehand-68f9@gregkh>
Date: Fri, 6 Dec 2024 07:46:17 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: Lee Jones <lee@...nel.org>
Cc: linux-kernel@...r.kernel.org, arnd@...db.de, ojeda@...nel.org,
	alex.gaynor@...il.com, boqun.feng@...il.com, gary@...yguo.net,
	bjorn3_gh@...tonmail.com, benno.lossin@...ton.me,
	a.hindborg@...nel.org, aliceryhl@...gle.com, tmgross@...ch.edu,
	rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v3 2/5] Documentation: ioctl-number: Carve out some
 identifiers for use by sample drivers

On Thu, Dec 05, 2024 at 04:25:19PM +0000, Lee Jones wrote:
> 32 IDs should be plenty (at yet, not too greedy) since a lot of sample
> drivers will use their own subsystem allocations.
> 
> Sample drivers predominately reside in <KERNEL_ROOT>/samples, but there
> should be no issue with in-place example drivers using them.
> 
> Signed-off-by: Lee Jones <lee@...nel.org>
> ---
>  Documentation/userspace-api/ioctl/ioctl-number.rst | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst
> index 243f1f1b554a..dc4bc0cab69f 100644
> --- a/Documentation/userspace-api/ioctl/ioctl-number.rst
> +++ b/Documentation/userspace-api/ioctl/ioctl-number.rst
> @@ -311,6 +311,7 @@ Code  Seq#    Include File                                           Comments
>                                                                       <mailto:oe@...t.de>
>  'z'   10-4F  drivers/s390/crypto/zcrypt_api.h                        conflict!
>  '|'   00-7F  linux/media.h
> +'|'   80-9F  samples/                                                Any sample and example drivers

This is fine, but why does the sample driver use "R" as the key instead?

thanks,

greg k-h