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Date: Wed, 9 Aug 2017 13:14:40 +1000
From: Stephen Rothwell <sfr@canb.auug.org.au>
To: Shaohua Li <shli@kernel.org>
Cc: Linux-Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Song Liu <songliubraving@fb.com>
Subject: linux-next: build warning after merge of the md tree
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Hi Shaohua,

After merging the md tree, today's linux-next build (powerpc
ppc64_defconfig) produced this warning:

drivers/md/raid5-cache.c: In function 'r5c_journal_mode_show':
drivers/md/raid5-cache.c:2535:2: warning: ignoring return value of 'mddev_lock', declared with attribute warn_unused_result [-Wunused-result]
  mddev_lock(mddev);
  ^

Introduced by commit

  7f7abe0ec5bb ("md/r5cache: call mddev_lock/unlock() in r5c_journal_mode_show")

-- 
Cheers,
Stephen Rothwell