linux-kernel - Re: [TOMOYO 05/15](repost) Domain transition handler functions.

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Message-Id: <200710032204.DFF51552.OFOSOFMVQtHLJF@I-love.SAKURA.ne.jp>
Date:	Wed, 3 Oct 2007 22:04:11 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	jmorris@...ei.org
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, chrisw@...s-sol.org
Subject: Re: [TOMOYO 05/15](repost) Domain transition handler functions.


James Morris wrote:
> I'm pretty sure that the singly linked list idea has been rejected a few 
> times.  Just use the existing API.
Too bad...

Well, is there a way to avoid read_lock when reading list?

Currently, TOMOYO Linux avoids read_lock, on the assumption that
(1) First, ptr->next is initialized with NULL.
(2) Later, ptr->next is assigned non-NULL address.
(3) Assigning to ptr->next is done atomically.

Regards.

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