---
- name: Get the list of mounted filesystems
  shell: cat /proc/mounts | awk '{ print $2}' | grep -E "^{{ mounted_fs }}"
  register: get_mounted_filesystems
  failed_when: False
  changed_when: get_mounted_filesystems.stdout | length > 0

- name: Umount filesystem
  mount:
    path: "{{ item }}"
    state: unmounted
  with_items:
    "{{ get_mounted_filesystems.stdout_lines }}"