[PATCH 4.4 60/69] cgroup: avoid false positive gcc-6 warning

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Arnd Bergmann commit cfe02a8a973e7e5f66926b8ae38dfce404b19e29 upstream. When all subsystems are disabled, gcc notices that cgroup_subsys_enabled_key is a zero-length array and

[PATCH 4.4 60/69] cgroup: avoid false positive gcc-6 warning

4.4-stable review patch. If anyone has any objections, please let me know. -- From: Arnd Bergmann commit cfe02a8a973e7e5f66926b8ae38dfce404b19e29 upstream. When all subsystems are disabled, gcc notices that cgroup_subsys_enabled_key is a zero-length array and that any access