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Date: Wed, 25 Jul 2007 05:14:07 +0100
From: Al Viro <viro@ftp.linux.org.uk>
To: rae l <crquan@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: [RFC] fs/super.c: Why alloc_super use a static variable default_op?
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On Wed, Jul 25, 2007 at 11:48:35AM +0800, rae l wrote:
> Why alloc_super use a static variable default_op?
> the static struct super_operations default_op is just all zeros, and
> just referenced as the initial value of a new allocated super_block,
> what does it for?

So that we would not have to care about ->s_op *ever* being NULL.