On Wed, Jul 02, 2014 at 07:50:53PM -0400, Tejun Heo wrote: > Currently, cftypes added by cgroup_add_cftypes() are used for both the > unified default hierarchy and legacy ones and subsystems can mark each > file with either CFTYPE_ONLY_ON_DFL or CFTYPE_INSANE if it has to > appear only on one of them. This is quite hairy and error-prone. > Also, we may end up exposing interface files to the default hierarchy > without thinking it through. > > cgroup_subsys will grow two separate cftype addition functions and > apply each only on the hierarchies of the matching type. This will > allow organizing cftypes in a lot clearer way and encourage subsystems > to scrutinize the interface which is being exposed in the new default > hierarchy. > > In preparation, this patch adds cgroup_add_legacy_cftypes() which > currently is a simple wrapper around cgroup_add_cftypes() and replaces > all cgroup_add_cftypes() usages with it. > > While at it, this patch drops a completely spurious return from > __hugetlb_cgroup_file_init(). > > This patch doesn't introduce any functional differences. > > Signed-off-by: Tejun Heo <[email protected]> > Cc: Johannes Weiner <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: Neil Horman <[email protected]> > Cc: Aneesh Kumar K.V <[email protected]> Acked-by: Neil Horman <[email protected]>
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