-static void
-ftrace_ops_control_func(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *op, struct pt_regs *regs)
-{
- if (unlikely(trace_recursion_test(TRACE_CONTROL_BIT)))
- return;
-
- /*
- * Some of the ops may be dynamically allocated,
- * they must be freed after a synchronize_sched().
- */
- preempt_disable_notrace();
- trace_recursion_set(TRACE_CONTROL_BIT);
-
- /*
- * Control funcs (perf) uses RCU. Only trace if
- * RCU is currently active.
- */
- if (!rcu_is_watching())
- goto out;
-
- do_for_each_ftrace_op(op, ftrace_control_list) {
- if (!(op->flags & FTRACE_OPS_FL_STUB) &&
- !ftrace_function_local_disabled(op) &&
- ftrace_ops_test(op, ip, regs))
- op->func(ip, parent_ip, op, regs);
- } while_for_each_ftrace_op(op);
- out:
- trace_recursion_clear(TRACE_CONTROL_BIT);
- preempt_enable_notrace();
-}
-
-static struct ftrace_ops control_ops = {
- .func = ftrace_ops_control_func,
- .flags = FTRACE_OPS_FL_RECURSION_SAFE | FTRACE_OPS_FL_INITIALIZED,
- INIT_OPS_HASH(control_ops)
-};
-