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Message-ID: <20120412174107.GB24541@redhat.com>
Date: Thu, 12 Apr 2012 19:41:07 +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>,
David Smith <dsmith@...hat.com>,
"Frank Ch. Eigler" <fche@...hat.com>,
Larry Woodman <lwoodman@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
geert@...ux-m68k.org, chris@...kel.net
Subject: Re: TIF_NOTIFY_RESUME [was Re: [PATCH v2 1/2] task_work_queue: add
generic process-context callbacks]
On 04/12, David Howells wrote:
>
> Oleg Nesterov <oleg@...hat.com> wrote:
>
> > +#ifdef TIF_NOTIFY_RESUME
>
> If we're going to keep this feature, I wonder if it's worth just requiring the
> arches lacking this feature to add it at this point, rather than adding all
> this conditional logic.
Yes, agreed. But until we update m68k/xtensa task_work has to check
if it is defined.
I'll try to cleanup this in v3. In fact, task_work_queue() makes sense
even without TIF_NOTIFY_RESUME, just it lacks set_notify_resume().
> It doesn't look like it should be too hard for m68k, but xtensa looks tricky.
I was going to add the maintainers ;)
Oleg.
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