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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.

RETURNS

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

March 2016 Kernel Hackers Manual 3.2.