BUG: bad unlock balance detected! -- [<c017986d>] generic_sync_sb_inodes+0x26a/0x275

["Miles Lane" <miles.lane@gmail.com>]

[ BUG: bad unlock balance detected! ]
-------------------------------------
swapper/0 is trying to release lock (inode_lock) at:
[<c017986d>] generic_sync_sb_inodes+0x26a/0x275
but there are no more locks to release!

other info that might help us debug this:
1 lock held by swapper/0:
#0:  (&type->s_umount_key){--..}, at: [<c0161eb2>] sget+0x1e4/0x31c

stack backtrace:
[<c0104ebb>] show_trace_log_lvl+0x1a/0x2f
[<c010559b>] show_trace+0x12/0x14
[<c010564d>] dump_stack+0x16/0x18
[<c0132252>] print_unlock_inbalance_bug+0xec/0xf9
[<c013421d>] lock_release_non_nested+0x95/0x150
[<c013442d>] lock_release+0x155/0x17c
[<c02d62ce>] _spin_unlock+0x16/0x3d
[<c017986d>] generic_sync_sb_inodes+0x26a/0x275
[<c0179895>] sync_sb_inodes+0x1d/0x20
[<c017990d>] sync_inodes_sb+0x75/0x7d
[<c0161ff7>] __fsync_super+0xd/0x66
[<c016205b>] fsync_super+0xb/0x19
[<c01620b2>] do_remount_sb+0x49/0x101
[<c016257c>] get_sb_single+0x77/0x8c
[<c0198c40>] sysfs_get_sb+0x1c/0x1e
[<c016243b>] vfs_kern_mount+0x81/0xf1
[<c01624c1>] kern_mount+0x16/0x18
[<c03d040a>] sysfs_init+0x57/0xa5
[<c03cefd8>] mnt_init+0xc5/0x1c2
[<c03ceced>] vfs_caches_init+0x138/0x149
[<c03be9e8>] start_kernel+0x1fb/0x344
[<00000000>] 0x0
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