From 9d19a054224cbc7145e39f33dd52b509aa1593b2 Mon Sep 17 00:00:00 2001
From: Kyle Lin <kylelin@google.com>
Date: Thu, 23 Apr 2020 23:19:25 +0800
Subject: [PATCH] rootdir: init.rc: mount tracefs

Bug: 153849221
Test: build and try to capture the trace by perfetto and systrace
Change-Id: Ie8a13e12038bd66afcd264079a2c5f25daaa20ee
---
 rootdir/init.rc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 6564e8f62..a380ebb20 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -78,6 +78,9 @@ on early-init
     mkdir /dev/boringssl 0755 root root
     mkdir /dev/boringssl/selftest 0755 root root
 
+    # Mount tracefs
+    mount tracefs tracefs /sys/kernel/tracing
+
 # Run boringssl self test for each ABI so that later processes can skip it. http://b/139348610
 on early-init && property:ro.product.cpu.abilist32=*
     exec_start boringssl_self_test32