linux-kernel - Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup

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Date:	Wed, 21 May 2008 14:58:57 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	wim@...ana.be, Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup

On Wednesday 21 May 2008 14:36:54 Andrew Morton wrote:
> On Wed, 21 May 2008 14:26:15 +1000 Rusty Russell <rusty@...tcorp.com.au> 
wrote:
> > > decent-sized smashup during the merge window.  There are lessons
> > > here...
> >
> > I've been pulling out s/down_trylock/down_nowait/ patches which effect
> > others' changes.  Those patches get moved to the end of my queue, and
> > I'll revisit them before an actual merge with Linus.
> >
> > As down_trylock still works (but marked deprecated) with my patches,
> > they're fine to drop.  Just tell me which ones...
>
> Well, a simple patch which does
>
> /*
>  * comment goes here
>  */
> static inline int __must_check down_nowait(struct semaphore *sem)
> {
> 	return !down_trylock(sem);
> }
>
> and which does not deprecate down_trylock() could go into mainline
> right now

Sure, in this case it's probably worth it.

> , (assuming that the overall concept doesn't get shot down in 
> review - did it get reviewed?)

Well, it got some commentry on lkml, mainly from Christoph H.  He was the one 
who came up with "down_nowait" vs the original "down_try".

> Then you can start trickling stuff out to people straight away.

OK, I'll send a patch now.

Thanks,
Rusty.



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