From: David Miller <davem@davemloft.net>
To: npiggin@suse.de
Cc: paulmck@linux.vnet.ibm.com, torvalds@linux-foundation.org,
anton@samba.org, akpm@linux-foundation.org,
willy@linux.intel.com, benh@kernel.crashing.org,
paulus@samba.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2]: atomic_t: Remove volatile from atomic_t definition
Date: Thu, 20 May 2010 22:54:54 -0700 (PDT) [thread overview]
Message-ID: <20100520.225454.37197037.davem@davemloft.net> (raw)
In-Reply-To: <20100521052746.GL2516@laptop>
From: Nick Piggin <npiggin@suse.de>
Date: Fri, 21 May 2010 15:27:46 +1000
> Hmm, I'm missing something. David, back up a second, as far as I can see,
> with Anton's patches, atomic_read() *is* effectively just ACCESS_ONCE()
> now. Linus pointed out that header tangle is the reason not to just use
> the macro.
My bad, I was under the impression that the proposal was to remove
volatile usage and also not even do ACCESS_ONCE() in atomic_read().
And then explicitly annotate call sits that actually need the
ACCESS_ONCE() semantic.
next prev parent reply other threads:[~2010-05-21 5:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-17 4:33 [PATCH 1/2]: atomic_t: Cast to volatile when accessing atomic variables Anton Blanchard
2010-05-17 4:34 ` [PATCH 2/2]: atomic_t: Remove volatile from atomic_t definition Anton Blanchard
2010-05-17 8:58 ` Heiko Carstens
2010-05-17 15:01 ` Linus Torvalds
2010-05-17 20:13 ` Jamie Lokier
2010-05-17 20:20 ` Linus Torvalds
2010-05-19 13:03 ` Nick Piggin
2010-05-19 14:55 ` Linus Torvalds
2010-05-19 15:01 ` Paul E. McKenney
2010-05-19 19:54 ` David Miller
2010-05-19 22:50 ` Paul E. McKenney
2010-05-21 5:27 ` Nick Piggin
2010-05-21 5:54 ` David Miller [this message]
2010-05-21 6:06 ` Nick Piggin
2010-05-21 6:10 ` David Miller
2010-05-21 6:44 ` Eric Dumazet
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