[ ? ?3.110632] [ INFO: suspicious RCU usage. ]
[ ? ?3.110632] 3.7.0-rc2+ #44 Not tainted
[ ? ?3.110632] -------------------------------
[ ? ?3.110632] include/linux/cgroup.h:566 suspicious
rcu_dereference_check() usage!
[ ? ?3.110632]
[ ? ?3.110632] other info that might help us debug this:
[ ? ?3.110632]
[ ? ?3.110632]
[ ? ?3.110632] rcu_scheduler_active = 1, debug_locks = 1
[ ? ?3.110632] 2 locks held by kdevtmpfs/22:
[ ? ?3.110632] ?#0: ?(sb_writers){.+.+.+}, at: [<ffffffff810f896e>]
mnt_want_write+0x1f/0x46
[ ? ?3.110632] ?#1: ?(&sb->s_type->i_mutex_key#3/1){+.+.+.}, at:
[<ffffffff810e9e98>] kern_path_create+0x7e/0x13f
[ ? ?3.110632]
[ ? ?3.110632] stack backtrace:
[ ? ?3.110632] Pid: 22, comm: kdevtmpfs Not tainted 3.7.0-rc2+ #44
[ ? ?3.110632] Call Trace:
[ ? ?3.110632] ?[<ffffffff8106b054>] lockdep_rcu_suspicious+0xfc/0x105
[ ? ?3.110632] ?[<ffffffff8119a707>] task_subsys_state.constprop.8+0x68/0x70
[ ? ?3.110632] ?[<ffffffff8119adbe>] devcgroup_inode_mknod+0x20/0x9e
[ ? ?3.110632] ?[<ffffffff81192798>] ? security_capable+0x13/0x15
[ ? ?3.110632] ?[<ffffffff81037ce4>] ? ns_capable+0x48/0x60
[ ? ?3.110632] ?[<ffffffff810ea36f>] vfs_mknod+0x64/0xb0
[ ? ?3.110632] ?[<ffffffff81251468>] handle_create.isra.2+0x13f/0x1b0
[ ? ?3.110632] ?[<ffffffff81251582>] ? devtmpfsd+0xa9/0x156
[ ? ?3.110632] ?[<ffffffff812515a5>] ? devtmpfsd+0xcc/0x156
[ ? ?3.110632] ?[<ffffffff812514d9>] ? handle_create.isra.2+0x1b0/0x1b0
[ ? ?3.110632] ?[<ffffffff812515c7>] devtmpfsd+0xee/0x156
[ ? ?3.110632] ?[<ffffffff812514d9>] ? handle_create.isra.2+0x1b0/0x1b0
[ ? ?3.110632] ?[<ffffffff81047ffb>] kthread+0xac/0xb4
[ ? ?3.110632] ?[<ffffffff81047f4f>] ? __kthread_parkme+0x60/0x60
[ ? ?3.110632] ?[<ffffffff81363e6c>] ret_from_fork+0x7c/0xb0
[ ? ?3.110632] ?[<ffffffff81047f4f>] ? __kthread_parkme+0x60/0x60