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Date: Fri, 18 Dec 2009 14:00:26 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Stefani Seibold <stefani@seibold.net>
Cc: Andy Walls <awalls@radix.net>,
       Mauro Carvalho Chehab <mchehab@infradead.org>,
       Linux Media Mailing List <linux-media@vger.kernel.org>,
       linux-kernel@vger.kernel.org
Subject: Re: [Fwd: [patch] media video cx23888 driver: ported to new kfifo
 API]
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On Fri, 18 Dec 2009 22:57:22 +0100
Stefani Seibold <stefani@seibold.net> wrote:

> But kfifo_len() did not
> requiere a lock in my opinion. It is save to use without a look. 

What do you mean by this?  Safe in general, or safe in this particular driver?

In either case: why?