BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5085, name: udevd
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
3 locks held by udevd/5085:
 #0: ffff88802a55e420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
 #1: ffff888023f1eb48 (&type->i_mutex_dir_key#5/1){+.+.}-{3:3}, a