[for-linus][PATCH 12/15] tracing: Use the new eventfs descriptor for print trigger

[Steven Rostedt]

From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>

The check to create the print event "trigger" was using the obsolete "dir"
value of the trace_event_file to determine if it should create the trigger
or not. But that value will now be NULL because it uses the event file
descriptor.

Change it to test the "ef" field of the trace_event_file structure so that
the trace_marker "trigger" file appears again.

Link: https://lkml.kernel.org/r/20230908022001.371815239@xxxxxxxxxxx

Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Ajay Kaher <akaher@xxxxxxxxxx>
Fixes: 27152bceea1df ("eventfs: Move tracing/events to eventfs")
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
 kernel/trace/trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0608ad20cf30..122c23c9eb28 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -9792,8 +9792,8 @@ init_tracer_tracefs(struct trace_array *tr, struct dentry *d_tracer)
 			  tr, &tracing_mark_fops);
 
 	file = __find_event_file(tr, "ftrace", "print");
-	if (file && file->dir)
-		trace_create_file("trigger", TRACE_MODE_WRITE, file->dir,
+	if (file && file->ef)
+		eventfs_add_file("trigger", TRACE_MODE_WRITE, file->ef,
 				  file, &event_trigger_fops);
 	tr->trace_marker_file = file;
 
-- 
2.40.1