From: "Stephan Müller" <fruktopus@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org
Subject: Re: [PATCH] Change userspace MKDEV, MAJOR, MINOR-macros from 8+8 bit, to 12+20 bit layout
Date: Sun, 14 Sep 2014 20:22:30 +0200 [thread overview]
Message-ID: <5415DCE6.301@gmail.com> (raw)
In-Reply-To: <20140914174622.GA10315@kroah.com>
Am 14.09.2014 19:46, schrieb Greg KH:
> On Sun, Sep 14, 2014 at 07:35:28PM +0200, Stephan Müller wrote:
>> Delete old userspace-only versions (8+8 bit). Instead expose the kernel-space
>> definitions (12+20 bit).
>>
>> Signed-off-by: Stephan Mueller <fruktopus@gmail.com>
>> ---
>>
>> Browsing some code I found that user-space and kernel-space macros for (un-)packing major/minor device numbers differ. The user-space ones using still the old 16 bit scheme. There was no explaining comment around and most libraries have their own macros anyway so it should not be a problematic UAPI change. So IMHO we could win some coherence in abandon this discrepancy.
>> Please correct me if I am wrong.
>
> You are wrong, we can't change this api, things will break :(
>
> sorry,
>
> greg k-h
I kind of expected this. The #ifndef __KERNEL__ was suspicious..
thanks
WARNING: multiple messages have this Message-ID (diff)
From: "Stephan Müller" <fruktopus@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-api@vger.kernel.org
Subject: Re: [PATCH] Change userspace MKDEV, MAJOR, MINOR-macros from 8+8 bit, to 12+20 bit layout
Date: Sun, 14 Sep 2014 20:22:30 +0200 [thread overview]
Message-ID: <5415DCE6.301@gmail.com> (raw)
In-Reply-To: <20140914174622.GA10315@kroah.com>
Am 14.09.2014 19:46, schrieb Greg KH:
> On Sun, Sep 14, 2014 at 07:35:28PM +0200, Stephan Müller wrote:
>> Delete old userspace-only versions (8+8 bit). Instead expose the kernel-space
>> definitions (12+20 bit).
>>
>> Signed-off-by: Stephan Mueller <fruktopus@gmail.com>
>> ---
>>
>> Browsing some code I found that user-space and kernel-space macros for (un-)packing major/minor device numbers differ. The user-space ones using still the old 16 bit scheme. There was no explaining comment around and most libraries have their own macros anyway so it should not be a problematic UAPI change. So IMHO we could win some coherence in abandon this discrepancy.
>> Please correct me if I am wrong.
>
> You are wrong, we can't change this api, things will break :(
>
> sorry,
>
> greg k-h
I kind of expected this. The #ifndef __KERNEL__ was suspicious..
thanks
next prev parent reply other threads:[~2014-09-14 18:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-14 17:35 [PATCH] Change userspace MKDEV, MAJOR, MINOR-macros from 8+8 bit, to 12+20 bit layout Stephan Müller
2014-09-14 17:35 ` Stephan Müller
[not found] ` <5415D1E0.3020905-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2014-09-14 17:46 ` Greg KH
2014-09-14 17:46 ` Greg KH
2014-09-14 18:22 ` Stephan Müller [this message]
2014-09-14 18:22 ` Stephan Müller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5415DCE6.301@gmail.com \
--to=fruktopus@gmail.com \
--cc=linux-api@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.