On Fri, Oct 05, 2012 at 04:55:21PM +0200, Arnd Bergmann wrote:

In a configuration where the base cgroup support is enabled but
every single cgroup subsys is turned off, CGROUP_BUILTIN_SUBSYS_COUNT
is zero, which causes the sanity check code in cgroup_load_subsys
to trigger:

       BUG_ON(ss->subsys_id >= CGROUP_BUILTIN_SUBSYS_COUNT);
       BUG_ON(subsys[ss->subsys_id] != ss);

CGROUP_BUILTIN_SUBSYS_COUNT is already gone in mainline.  I suppose
this is no longer necessary?

Thanks.

-- 
tejun