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Date: Tue, 24 Mar 2015 10:39:55 -0400
From: Rik van Riel <riel@redhat.com>
MIME-Version: 1.0
Subject: Re: [PATCH] mm: Remove usages of ACCESS_ONCE
References: <1427150680.2515.36.camel@j-VirtualBox>
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To: Jason Low <jason.low2@hp.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org
Cc: Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@suse.cz>, Christoph Lameter <cl@linux.com>, Linus Torvalds <torvalds@linux-foundation.org>, David Rientjes <rientjes@google.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Aswin Chandramouleeswaran <aswin@hp.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Mel Gorman <mgorman@suse.de>, Hugh Dickins <hughd@google.com>, Minchan Kim <minchan@kernel.org>, Davidlohr Bueso <dave@stgolabs.net>

On 03/23/2015 06:44 PM, Jason Low wrote:
> Commit 38c5ce936a08 converted ACCESS_ONCE usage in gup_pmd_range() to
> READ_ONCE, since ACCESS_ONCE doesn't work reliably on non-scalar types.
> 
> This patch removes the rest of the usages of ACCESS_ONCE, and use
> READ_ONCE for the read accesses. This also makes things cleaner,
> instead of using separate/multiple sets of APIs.
> 
> Signed-off-by: Jason Low <jason.low2@hp.com>

Acked-by: Rik van Riel <riel@redhat.com>


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