linux-kernel - Re: [lkp-robot] [block] c4e7d723f3: WARNING:at_block/blk-merge.c:#attempt

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Date:   Tue, 30 May 2017 15:01:10 +0000
From:   Bart Van Assche <Bart.VanAssche@...disk.com>
To:     "xiaolong.ye@...el.com" <xiaolong.ye@...el.com>
CC:     "hch@....de" <hch@....de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "hare@...e.com" <hare@...e.com>, "osandov@...com" <osandov@...com>,
        "lkp@...org" <lkp@...org>,
        "ming.lei@...hat.com" <ming.lei@...hat.com>
Subject: Re: [lkp-robot] [block]  c4e7d723f3:
 WARNING:at_block/blk-merge.c:#attempt_merge

On Sun, 2017-05-28 at 13:33 +0800, kernel test robot wrote:
> [  207.874416] WARNING: CPU: 0 PID: 419 at block/blk-merge.c:674 attempt_merge+0xd1/0x11a6

I will fix this by adding if (!q->mq_ops) in front of the lockdep_assert_held()
statement in attempt_merge().

Bart.