linux-kernel - Re: [PATCH v4 3/3] cred: change keyctl_session_to_parent() to use task_work

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Message-ID: <20120419173431.GA27066@redhat.com>
Date:	Thu, 19 Apr 2012 19:34:31 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alexander Gordeev <agordeev@...hat.com>,
	Chris Zankel <chris@...kel.net>,
	David Smith <dsmith@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Larry Woodman <lwoodman@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/3] cred: change keyctl_session_to_parent() to use
	task_work_add()

On 04/19, David Howells wrote:
>
> Oleg Nesterov <oleg@...hat.com> wrote:
>
> > +#define key_replace_session_keyring()	do { } while (0)
> > +
>
> Ummm... Why?  You've made the function no longer exist and so this shouldn't be
> there anymore.  You shouldn't just leave the call sites in place.

Sure!

I'll send the (trivial) patches to cleanup the code in arch/ (24 callers),
plus we should kill the no longer used task ->replacement_session_keyring
and update copy_creds/exit_creds.

But I certainly do not want to put these changes in 3/3 or in this series.
I'll send the patches to Andrew once (I hope ;) he takes 1-3.

Oleg.

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