linux-kernel - Re: [PATCH memory-barriers.txt 2/7] documentation: Fix missed renaming: s/lock/acquire

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Date:	Wed, 13 Apr 2016 14:46:51 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, rostedt@...dmis.org,
	dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com,
	fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com,
	SeongJae Park <sj38.park@...il.com>
Subject: Re: [PATCH memory-barriers.txt 2/7] documentation: Fix missed
 renaming: s/lock/acquire

On Tue, Apr 12, 2016 at 08:52:50AM -0700, Paul E. McKenney wrote:
> From: SeongJae Park <sj38.park@...il.com>
> 
> Terms `lock` and `unlock` have changed to `acquire` / `release` by
> commit 2e4f5382d12a441b5cccfdde00308df15c2ce300 ("locking/doc: Rename
> LOCK/UNLOCK to ACQUIRE/RELEASE").  However, the commit missed to change
> the table of content.  This commit changes the missed parts.
> Also, section name `Acquiring functions` is not appropriate for the
> section because the section is saying about lock in actual.  This commit
> changes the name to more appropriate name, `Lock acquisition functions`.
> 

True, because of this ppc thing :/

If we get PPC to switch to RCsc locks, there actually is a difference
again.

Given the current state I'm not sure how much we should care, but
there's a fundamental difference between things like load-acquire and
acquiring a lock, in that the lock-acquire must also very much imply a
store.

In any case, these are jet-lagged ramblings, feel free to ignore :-)