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Date: Thu, 5 Apr 2018 16:56:50 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Daniel Jordan <daniel.m.jordan@oracle.com>, parri.andrea@gmail.com,
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        Steven Sistare <steven.sistare@oracle.com>,
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Subject: Re: Control dependency between prior load in while condition and
 later store?
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 <Pine.LNX.4.44L0.1804051022170.1384-100000@iolanthe.rowland.org>
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On Thu, Apr 05, 2018 at 10:35:22AM -0400, Alan Stern wrote:
> In this example, READ_ONCE() is in fact a volatile access, so we're 
> okay.

But our documentation clearly states a control-dep can only be from a
READ_ONCE() (or something stronger), right? So we should be good
irrespectively.