probe kernel.function("prepare_to_wait*"),
      kernel.function("add_wait_queue*") {
    if(pid() == stp_pid()) next;

    state = -1;
    if(@defined($state))
        state = $state;
      
    printf("[%d]%s %s:%s\n\twq head: %p wq: %p\n", 
           pid(), execname(), symname(caller_addr()), 
           probefunc(), $q, $wait);
    printf("\ttsk: %p state: %x func: %s\n", 
           $wait->private, state, symname($wait->func));
}

probe kernel.function("wait_for_completion*") {
    if(pid() == stp_pid()) next;

    timeout = 0;
    if(@defined($timeout))
        timeout = $timeout;
    
    printf("[%d]%s %s:%s\n\tcompletion: %pwq head: %p timeout: %d\n", 
            pid(), execname(), symname(caller_addr()), 
            probefunc(), $x, &$x->wait, timeout);
}

probe kernel.function("wait_for_completion*").return {
    if(pid() == stp_pid()) next;

    printf("[%d]%s %s:%s\n\tcompletion: %p\n", 
            pid(), execname(), symname(caller_addr()), probefunc(), $x);
}

probe kernel.function("finish_wait"),
      kernel.function("remove_wait_queue") {
    if(pid() == stp_pid()) next;

    printf("[%d]%s %s:%s\n\twq head: %p wq: %p\n", 
           pid(), execname(), symname(caller_addr()), 
           probefunc(), $q, $wait);
}
    
probe kernel.function("complete"),
      kernel.function("complete_all") {
    if(pid() == stp_pid()) next;

    printf("[%d]%s %s:%s\n\tcompletion: %p wq head: %p\n", 
            pid(), execname(), symname(caller_addr()), 
            probefunc(), $x, &$x->wait);
}

probe kernel.function("__wake_up"),
      kernel.function("__wake_up_locked*"), 
      kernel.function("__wake_up_sync*") {
    if(pid() == stp_pid()) next;

    nr = -1
    if(@defined($nr_exclusive))
        nr = $nr_exclusive;
    if(@defined($nr))
        nr = $nr;
    
    printf("[%d]%s %s:%s\n\twq head: %p state: %p nr: %d\n", 
            pid(), execname(), symname(caller_addr()), 
            probefunc(), $q, $mode, nr);
}