From 3a63283affdb32674c06e81da584682da36ba88b Mon Sep 17 00:00:00 2001
From: Srinivas Paladugu <srnvs@google.com>
Date: Wed, 9 Jan 2019 11:28:59 -0800
Subject: [PATCH] Allow write access to system_server on zram sysfs

System server needs to be able to write to idle and
writeback nodes in the zram sysfs directory.

Bug: 117682284
Bug: 122674343
Test: Test writeback on go ref device
Change-Id: I1cd663b73a7ebb255fe7e459601e720961bbd69e
---
 rootdir/init.rc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 9b2096412..026dbedca 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -643,6 +643,12 @@ on boot
     chown root system /sys/module/lowmemorykiller/parameters/minfree
     chmod 0664 /sys/module/lowmemorykiller/parameters/minfree
 
+    # System server manages zram writeback
+    chown root system /sys/block/zram0/idle
+    chmod 0664 /sys/block/zram0/idle
+    chown root system /sys/block/zram0/writeback
+    chmod 0664 /sys/block/zram0/writeback
+
     # Tweak background writeout
     write /proc/sys/vm/dirty_expire_centisecs 200
     write /proc/sys/vm/dirty_background_ratio  5