linux-kernel - linux-next: build failure after merge of the f2fs tree

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Date:   Thu, 18 Jan 2018 10:04:30 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chris Mason <clm@...com>,
        Josef Bacik <jbacik@...com>
Cc:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Yufen Yu <yuyufen@...wei.com>, Tejun Heo <tj@...nel.org>
Subject: linux-next: build failure after merge of the f2fs tree

Hi Jaegeuk,

After merging the f2fs tree, today's linux-next build (x86_64
allmodconfig) failed like this:

/home/sfr/next/next/fs/f2fs/super.c: In function 'f2fs_fill_super':
/home/sfr/next/next/fs/f2fs/super.c:2563:18: error: 'SB_I_CGROUPWB' undeclared (first use in this function); did you mean 'S_CGROUPWB'?
  sb->s_iflags |= SB_I_CGROUPWB;
                  ^~~~~~~~~~~~~
                  S_CGROUPWB

Caused by commit

  578c647879f7 ("f2fs: implement cgroup writeback support")

interacting with commit

  34934189a3dd ("cgroup, writeback: replace SB_I_CGROUPWB with per-inode S_CGROUPWB"

from the btrfs tree.

I have reverted the f2fs tree commit for today, but a better resolution
would be appreciated.

-- 
Cheers,
Stephen Rothwell