linux-kernel - Re: [RFC][PATCH 2/3] locking: Annotate spin_unlock

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Date:	Tue, 24 May 2016 12:22:07 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Manfred Spraul <manfred@...orfullife.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Will Deacon <will.deacon@....com>,
	Boqun Feng <boqun.feng@...il.com>,
	Waiman Long <Waiman.Long@....com>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.net>,
	Oleg Nesterov <oleg@...hat.com>,
	netfilter-devel@...r.kernel.org,
	Sasha Levin <sasha.levin@...cle.com>, hofrat@...dl.org
Subject: Re: [RFC][PATCH 2/3] locking: Annotate spin_unlock_wait() users

Hello,

On Tue, May 24, 2016 at 09:17:13AM -0700, Linus Torvalds wrote:
> So don't talk about "acquire". And most certainly don't talk about
> "control dependencies". Not if we end up having things like *drivers*
> using this like in this example libata.

A delta but that particular libata usage is probably not needed now.
The path was used while libata was gradually adding error handlers to
the low level drivers.  I don't think we don't have any left w/o one
at this point.  I'll verify and get rid of that usage.

Thanks.

-- 
tejun