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 Kernel Hackers Manual 3.10 June 2014 WAIT_TASK_STOPPED(9)
Check Out this Related Man Page
clear_wait(9r)clear_wait(9r)NAME
clear_wait - General: Clears the wait condition
SYNOPSIS
void clear_wait(
thread_t thread,
int result,
boolean_t interrupt_only );
ARGUMENTS
Specifies a pointer to the thread Specifies the outcome of the wait. You can pass one of the following values: This is a normal wakeup.
The timeout period expired. The clear_wait routine interrupted the wakeup. Specifies a Boolean value that indicates how the clear_wait
routine clears the wait condition. You can pass one of the following values: Clears the wait condition only if the kernel thread is waiting
in an interruptible state. Clears the wait condition under any circumstances.
DESCRIPTION
The clear_wait routine clears the wait condition for the specified kernel thread and starts executing the kernel thread, if appropriate. If
the kernel thread is interruptible and is still waiting for the event, clear_wait sets the kernel thread state to TH_RUN and places it on
the run queue.
RETURN VALUES
None
SEE ALSO
Routines: assert_wait_mesg(9r), mpsleep(9r), thread_block(9r), thread_wakeup(9r), thread_wakeup_one(9r)clear_wait(9r)
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