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: <20241206071544.GD8882@google.com>
Date: Fri, 6 Dec 2024 07:15:44 +0000
From: Lee Jones <lee@...nel.org>
To: Greg KH <gregkh@...uxfoundation.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 Fri, 06 Dec 2024, Greg KH wrote:

> 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?

You're right, I need to change that (and the example user app) over
to use this new keyword as well.  Thanks for noticing.

-- 
Lee Jones [李琼斯]