linux-kernel - Re: [GIT PULL] kdbus for 4.1-rc1

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Date:	Tue, 14 Apr 2015 20:35:33 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>, Jiri Kosina <jkosina@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Tue, Apr 14, 2015 at 09:23:57PM +0200, Greg Kroah-Hartman wrote:

> > I agree.  You've sent a pull request for an unfortunate design.  I
> > don't think that unfortunate design belongs in the kernel.  If it says
> > in userspace, then user programmers could potentially fix it some day.
> 
> You might not like the design, but it is a valid design.  Again, we
> don't refuse to support hardware that is designed badly.  Or support
> protocols we don't necessarily like, that's not the job of a kernel or
> operating system.

Bullshit.  The problem you seem to deliberately ignore is that once it's
in the kernel, it's impossible to eradicate.  It's not just a crap design,
it's a crap design you are taking in as-is.

And no, "the sole consumer of that API knows better, so bend over" is not
a good idea.  We have shitloads of examples when single-consumer APIs
turned into screaming horrors; taking that in over the objections to API
design, merely on "they do it that way, who the hell we are to say they
are wrong?" is insane.
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