Hi Artem,

Kernel build failed on

tree:   git://git.infradead.org/users/dedekind/linux-misc.git master
head:   ab80141c7fe63aed9fe957e4dd60901b19bd5ff7
commit: ab80141c7fe63aed9fe957e4dd60901b19bd5ff7 [30/30] fs/ufs: get rid of write_super
config: i386-randconfig-fs2 (attached as .config)

vim +25 fs/ufs/ufs.h
    22		struct task_struct *mutex_owner;
    23		struct super_block *sb;
    24		int work_queued; /* non-zero if the delayed work is queued */
  > 25		struct delayed_work sync_work; /* FS sync delayed work */
    26		spinlock_t work_lock; /* protects sync_work and work_queued */
    27	};
    28	

Can be fixed with a

+#include <linux/workqueue.h>

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0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu <wfg@linux.intel.com>                     Intel Corporation