linux-kernel - Re: [PATCH 2/7] kfifo: move out spinlock

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Message-Id: <1250502993.27083.1.camel@wall-e>
Date:	Mon, 17 Aug 2009 11:56:33 +0200
From:	Stefani Seibold <stefani@...bold.net>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Amerigo Wang <xiyou.wangcong@...il.com>,
	Joe Perches <joe@...ches.com>
Subject: Re: [PATCH 2/7] kfifo: move out spinlock

Am Montag, den 17.08.2009, 11:52 +0200 schrieb Andi Kleen:
> > I think the break is not so hard if you believe. All you have to do is
> > to replace or kfifo_get() into kfifo_out_locked() and kfifo_put() into
> > kfifo_in_locked() if you really need the old behavior.
> > 
> > The thing is that we get no progress without changes.
> 
> One thing that would be good to ensure is that old unconverted code
> gets a clear compile time error, just in case some out of tree
> code uses it. 

This is already done.

> Bonus points also for having a short comment in kfifo.h that 
> explains how to do the conversion.
> 

I can do this on a maintainance patch.

> Other than that I would be all for getting rid of embedded spinlocks
> completely.
> 
> -Andi


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