From f0426467922bb8cb195de0f73c10ddf9bcf5d835 Mon Sep 17 00:00:00 2001
From: Sergei Trofimov <sergei.trofimov@arm.com>
Date: Wed, 4 Oct 2017 13:19:26 +0100
Subject: [PATCH] module/hotplug: optimize online_all

Optimize online_all by offloading it to a shutils function which only
requres a single call to the target.
---
 devlib/bin/scripts/shutils.in | 16 ++++++++++++++++
 devlib/module/hotplug.py      |  3 ++-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/devlib/bin/scripts/shutils.in b/devlib/bin/scripts/shutils.in
index 004030d..a678a65 100755
--- a/devlib/bin/scripts/shutils.in
+++ b/devlib/bin/scripts/shutils.in
@@ -195,6 +195,19 @@ cgroups_freezer_set_state() {
     exit 1
 }
 
+################################################################################
+# Hotplug
+################################################################################
+
+hotplug_online_all() {
+    PATHS=(/sys/devices/system/cpu/cpu[0-9]*)
+    for path in "${PATHS[@]}"; do
+        if [ $(cat $path/online) -eq 0 ]; then
+            echo 1 > $path/online
+        fi
+    done
+}
+
 ################################################################################
 # Misc
 ################################################################################
@@ -252,6 +265,9 @@ cgroups_freezer_set_state)
 ftrace_get_function_stats)
     ftrace_get_function_stats
     ;;
+hotplug_online_all)
+	hotplug_online_all
+    ;;
 read_tree_values)
 	read_tree_values $*
     ;;
diff --git a/devlib/module/hotplug.py b/devlib/module/hotplug.py
index 8ae238e..cfce2e5 100644
--- a/devlib/module/hotplug.py
+++ b/devlib/module/hotplug.py
@@ -21,7 +21,8 @@ class HotplugModule(Module):
         return target.path.join(cls.base_path, cpu, 'online')
 
     def online_all(self):
-        self.online(*range(self.target.number_of_cpus))
+        self.target._execute_util('hotplug_online_all',
+                                  as_root=self.target.is_rooted)
 
     def online(self, *args):
         for cpu in args: