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Date:   Fri, 8 May 2020 15:28:33 +1000
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Jens Axboe <axboe@kernel.dk>
Cc:     Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Yufen Yu <yuyufen@huawei.com>
Subject: linux-next: build failure after merge of the block tree
Message-ID: <20200508152833.7e840076@canb.auug.org.au>
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Hi all,

After merging the block tree, today's linux-next build (x86_64
allmodconfig) failed like this:

In file included from include/linux/kernel.h:15,
                 from include/linux/list.h:9,
                 from include/linux/module.h:12,
                 from block/bfq-iosched.c:116:
block/bfq-iosched.c: In function 'bfq_set_next_ioprio_data':
block/bfq-iosched.c:4980:5: error: implicit declaration of function 'bdi_de=
v_name'; did you mean 'blkg_dev_name'? [-Werror=3Dimplicit-function-declara=
tion]
 4980 |     bdi_dev_name(bfqq->bfqd->queue->backing_dev_info),
      |     ^~~~~~~~~~~~

Caused by commit

  0f6438fca125 ("bdi: use bdi_dev_name() to get device name")

I have applied the following patch for today.

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Fri, 8 May 2020 15:23:50 +1000
Subject: [PATCH] bdi: bdi_dev_name() needs backing-dev.h

Fixes: 0f6438fca125 ("bdi: use bdi_dev_name() to get device name")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
 block/bfq-iosched.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 4d4fe44a9eea..3d411716d7ee 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -123,6 +123,7 @@
 #include <linux/ioprio.h>
 #include <linux/sbitmap.h>
 #include <linux/delay.h>
+#include <linux/backing-dev.h>
=20
 #include "blk.h"
 #include "blk-mq.h"
--=20
2.26.2

--=20
Cheers,
Stephen Rothwell

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