clear_ftrace_pids

Name:clear_ftrace_pids

Proto:static void clear_ftrace_pids(struct trace_array *tr)

Type:void

Parameter:

Type	Parameter	Name
struct trace_array *	tr

6978

pid_list = cu_dereference_protected() - fetch RCU pointer when updates prevented*@p: The pointer to read, prior to dereferencing*@c: The conditions under which the dereference will take place* Return the value of the specified RCU-protected pointer, but omit(function_pids, lockdep_is_held( & ftrace_lock))

6980

If Not pid_list Then Return

6983

Tracepoint for task switches, performed by the scheduler:

6985

for_each_possible_cpu(cpu)

6986

({

6986

({

6986

Do

6986

const void * __vpp_verify = NULL

6986

When 0 cycle

6986

6986

})

6986

})->ftrace_ignore_pid = false

6988

cu_assign_pointer() - assign to RCU-protected pointer*@p: pointer to assign to*@v: value to assign (publish)* Assigns the specified value to the specified RCU-protected* pointer, ensuring that any concurrent RCU readers will see* any prior initialization(function_pids, NULL)

6991

Wait for a grace period to elapse. But it is illegal to invoke* synchronize_rcu() from within an RCU read-side critical section.* Therefore, any legal call to synchronize_rcu() is a quiescent

6993

trace_free_pid_list(pid_list)

**Caller**
Name	Describe
ftrace_clear_pids
ftrace_pid_reset

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