43 

 44 When locking rules are violated, these state bits are presented in the

 45 locking error messages, inside curlies. A contrived example:

 46 

 47    modprobe/2287 is trying to acquire lock:

 48     (&sio_locks[i].lock){-.-...}, at: [<c02867fd>] mutex_lock+0x21/0x24

 49 

 50    but task is already holding lock:

 51     (&sio_locks[i].lock){-.-...}, at: [<c02867fd>] mutex_lock+0x21/0x24

 52 

 53 

 54 The bit position indicates STATE, STATE-read, for each of the states listed

 55 above, and the character displayed in each indicates:

 56 

 57    '.'  acquired while irqs disabled and not in irq context

 58    '-'  acquired in irq context

 59    '+'  acquired with irqs enabled

 60    '?'  acquired in irq context with irqs enabled.