TASK_WAKEKILL
#define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
#define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
if (!(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
state = TASK_WAKEKILL | __TASK_TRACED;
(state & (TASK_INTERRUPTIBLE | TASK_WAKEKILL)))
(state & (TASK_WAKEKILL | TASK_NOLOAD | TASK_FROZEN)))