Subject: linux-next: build warnings after merge of the access_once tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 26 Mar 2015 19:31:12 +1100

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 won'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.

-- 
Cheers,
Stephen Rothwell                    [email-masked]