tracing/ftrace: Allow instances to have their own function probes

Pass around the local trace_array that is the descriptor for tracing
instances, when enabling and disabling probes. This by default sets the
enable/disable of event probe triggers to work with instances.

The other probes will need some more work to get them working with
instances.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

kernel/trace/ftrace.c

@@ -3077,7 +3077,7 @@ static void *
 t_probe_next(struct seq_file *m, loff_t *pos)
 {
 	struct ftrace_iterator *iter = m->private;
-	struct trace_array *tr = global_ops.private;
+	struct trace_array *tr = iter->ops->private;
 	struct list_head *func_probes;
 	struct ftrace_hash *hash;
 	struct list_head *next;
@@ -4311,7 +4311,7 @@ static int ftrace_process_regex(struct ftrace_iterator *iter,
 				char *buff, int len, int enable)
 {
 	struct ftrace_hash *hash = iter->hash;
-	struct trace_array *tr = global_ops.private;
+	struct trace_array *tr = iter->ops->private;
 	char *func, *command, *next = buff;
 	struct ftrace_func_command *p;
 	int ret = -EINVAL;