tracing: Remove check_arg() callbacks from dynevent args

It's kind of strange to have check_arg() callbacks as part of the arg
objects themselves; it makes more sense to just pass these in when the
args are added instead.

Remove the check_arg() callbacks from those objects which also means
removing the check_arg() args from the init functions, adding them to
the add functions and fixing up existing callers.

Link: http://lkml.kernel.org/r/c7708d6f177fcbe1a36b6e4e8e150907df0fa5d2.1580506712.git.zanussi@kernel.org

Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 307abb7..fe183d4 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -962,9 +962,9 @@ int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, bool kretprobe,
 	if (ret)
 		return ret;
 
-	dynevent_arg_init(&arg, NULL, 0);
+	dynevent_arg_init(&arg, 0);
 	arg.str = loc;
-	ret = dynevent_arg_add(cmd, &arg);
+	ret = dynevent_arg_add(cmd, &arg, NULL);
 	if (ret)
 		return ret;
 
@@ -982,7 +982,7 @@ int __kprobe_event_gen_cmd_start(struct dynevent_cmd *cmd, bool kretprobe,
 		}
 
 		arg.str = field;
-		ret = dynevent_arg_add(cmd, &arg);
+		ret = dynevent_arg_add(cmd, &arg, NULL);
 		if (ret)
 			break;
 	}
@@ -1017,7 +1017,7 @@ int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...)
 	if (cmd->type != DYNEVENT_TYPE_KPROBE)
 		return -EINVAL;
 
-	dynevent_arg_init(&arg, NULL, 0);
+	dynevent_arg_init(&arg, 0);
 
 	va_start(args, cmd);
 	for (;;) {
@@ -1033,7 +1033,7 @@ int __kprobe_event_add_fields(struct dynevent_cmd *cmd, ...)
 		}
 
 		arg.str = field;
-		ret = dynevent_arg_add(cmd, &arg);
+		ret = dynevent_arg_add(cmd, &arg, NULL);
 		if (ret)
 			break;
 	}