linux-kernel - Re: [QUESTION] llist: Comment releasing 'must delete' restriction before traversing

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Message-ID: <20180731085257.GR2494@hirez.programming.kicks-ass.net>
Date:   Tue, 31 Jul 2018 10:52:57 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Byungchul Park <byungchul.park@....com>
Cc:     linux-kernel@...r.kernel.org, kernel-team@....com,
        ying.huang@...el.com, mingo@...nel.org, jiangshanlai@...il.com,
        paulmck@...ux.vnet.ibm.com, josh@...htriplett.org,
        rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
        joel@...lfernandes.org, len.brown@...el.com, glider@...gle.com,
        peter@...leysoftware.com, aik@...abs.ru
Subject: Re: [QUESTION] llist: Comment releasing 'must delete' restriction
 before traversing

On Tue, Jul 31, 2018 at 09:58:36AM +0900, Byungchul Park wrote:
> In restrictive cases like only addtions happen but never deletion, can't
> we safely traverse a llist? I believe llist can be more useful if we can
> release the restriction. Can't we?

Yes you can, but I'm not sure it makes much sense to confuse the
comments with this.

This really ends up in the 'you had better know what you're doing'
category.