diff -drupN a/kernel/trace/trace.h b/kernel/trace/trace.h
--- a/kernel/trace/trace.h	2018-08-06 17:23:04.000000000 +0300
+++ b/kernel/trace/trace.h	2022-06-12 05:28:14.000000000 +0300
@@ -690,6 +690,7 @@ extern cycle_t ftrace_now(int cpu);
 
 extern void trace_find_cmdline(int pid, char comm[]);
 extern void trace_event_follow_fork(struct trace_array *tr, bool enable);
+extern int trace_find_tgid(int pid);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 extern unsigned long ftrace_update_tot_cnt;
@@ -1009,7 +1010,8 @@ extern int trace_get_user(struct trace_p
 		FUNCTION_FLAGS					\
 		FGRAPH_FLAGS					\
 		STACK_FLAGS					\
-		BRANCH_FLAGS
+		BRANCH_FLAGS					\
+		C(TGID,			"print-tgid"),
 
 /*
  * By defining C, we can make TRACE_FLAGS a list of bit names