linux-kernel - [PATCH memory-model 0/3] Kernel fixes to spin_is

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Message-Id: <20180514230105.GA6421@linux.vnet.ibm.com>
Date:   Mon, 14 May 2018 16:01:05 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        mingo@...nel.org
Cc:     stern@...land.harvard.edu, parri.andrea@...il.com,
        will.deacon@....com, peterz@...radead.org, boqun.feng@...il.com,
        npiggin@...il.com, dhowells@...hat.com, j.alglave@....ac.uk,
        luc.maranget@...ia.fr, akiyks@...il.com
Subject: [PATCH memory-model 0/3] Kernel fixes to spin_is_locked()

Hello!

This series contains fixes to the kernel related to the semantics
of spin_is_locked(), all courtesy of Andrea Parri, and all ready for
inclusion in -tip:

1.	Document the semantics of spin_is_locked() by adding a docbook
	header comment.

2.	Remove smp_mb() from arch_spin_is_locked(), given that the
	new order-free spin_is_locked() semantics require no such barrier.

3.	Clean up comment and #ifndef for {,queued_}spin_is_locked().
	The comment was "XXX think about spin_is_locked", and I can
	attest that we have now done some serious thinking.  ;-)

							Thanx, Paul

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