WAIT_TASK_STOPPED(9)                      Driver Basics                      WAIT_TASK_STOPPED(9)



NAME
       wait_task_stopped - Wait for TASK_STOPPED or TASK_TRACED

SYNOPSIS
       int wait_task_stopped(struct wait_opts * wo, int ptrace, struct task_struct * p);

ARGUMENTS
       wo
           wait options

       ptrace
           is the wait for ptrace

       p
           task to wait for

DESCRIPTION
       Handle sys_wait4 work for p in state TASK_STOPPED or TASK_TRACED.

CONTEXT
       read_lock(tasklist_lock), which is released if return value is non-zero. Also, grabs and
       releases p->sighand->siglock.

RETURN
       0 if wait condition didn't exist and search for other wait conditions should continue.
       Non-zero return, -errno on failure and p's pid on success, implies that tasklist_lock is
       released and wait condition search should terminate.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      WAIT_TASK_STOPPED(9)