* updated description

* use handler for the reboot
* removed ARM cpu detection

roles/raspberrypi/tasks/prereq/Ubuntu.yml

@@ -1,18 +1,8 @@
 ---
-- name: Enable cgroup via boot commandline if not already enabled for Ubuntu on ARM
+- name: Enable cgroup via boot commandline if not already enabled for Ubuntu on a Raspberry Pi
   lineinfile:
     path: /boot/firmware/cmdline.txt
     backrefs: yes
     regexp: '^((?!.*\bcgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory\b).*)$'
     line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
-  when:
-    - ansible_distribution == 'Ubuntu'
-    - ( ansible_facts.architecture is search("arm") or
-        ansible_facts.architecture is search("aarch64") )
-
-- name: Reboot to enable cgroups for Ubuntu on ARM
-  reboot:
-  when:
-    - ansible_distribution == 'Ubuntu'
-    - ( ansible_facts.architecture is search("arm") or
-        ansible_facts.architecture is search("aarch64") )
+  notify: reboot