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Date: Thu, 26 Mar 2015 19:31:12 +1100
From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Christian Borntraeger <borntraeger@de.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>
Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
        Davidlohr Bueso <dave@stgolabs.net>
Subject: linux-next: build warnings after merge of the access_once tree
Message-ID: <20150326193112.2c87eb39@canb.auug.org.au>
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Hi Christian,

After merging the access_once tree, today's linux-next build (arm
multi_v7_defconfig) produced lots of this warning:

In file included from include/linux/linkage.h:4:0,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/lockref.h:17,
                 from lib/lockref.c:2:
In function '__read_once_size',
    inlined from 'lockref_get' at lib/lockref.c:50:2:
include/linux/compiler.h:216:3: warning: call to 'data_access_exceeds_word_=
size' declared with attribute warning: data access exceeds word size and wo=
n't be atomic
   data_access_exceeds_word_size();
   ^

Introduced by commit 6becd6bd5e89 ("compiler.h: Fix word size check for
READ/WRITE_ONCE") presumably interacting with commit 4d3199e4ca8e
("locking: Remove ACCESS_ONCE() usage") from the tip tree.

--=20
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

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