linux-kernel - Re: [PATCH 2/3] workqueue, async: implement work/async_current

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Date:	Thu, 17 Jan 2013 19:47:18 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Arjan van de Ven <arjan@...ux.intel.com>,
	Ming Lei <ming.lei@...onical.com>,
	Alex Riesen <raa.lkml@...il.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Jens Axboe <axboe@...nel.dk>,
	USB list <linux-usb@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 2/3] workqueue, async: implement work/async_current_func()

On Thu, Jan 17, 2013 at 07:18:26PM -0800, Linus Torvalds wrote:
> I'm not sure I understand what you mean? Do you mean trying to limit
> work_current_func() to only be accessible to the async code? You'd
> have to make some kind of private header file under kernel/ for that,
> but I guess that would work fine. We already do something similar
> inside filesystems etc, where they have their own local headers.

Yeap, and I'm unsure whether it's worth introducing a new internal
header file.

> Yes, yes, some globally optimizing compiler could sort it all out, but
> I'd personally be inclined to just move all the structure definitions
> into kernel/worker.h, and make the code be inline functions. The only
> actual current *user* would also be in the kernel/ subdirectory, and
> we don't know if we'd ever want to really expand it past there.
> 
> Hmm?

If we're gonna make it kernel/ internal thing with internal header, we
definitely can go all the way.  It's a bit meh because the code path
involved is very cold.  Hmm... I'll make it that way.  I like how it
keeps the thing apparently internal.

Thanks.

-- 
tejun
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