• Tejun Heo's avatar
    cgroup: replace cgroup_add_cftypes() with cgroup_add_legacy_cftypes() · 2cf669a5
    Tejun Heo authored
    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: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
    Acked-by: default avatarLi Zefan <lizefan@huawei.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Michal Hocko <mhocko@suse.cz>
    Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    2cf669a5
tcp_memcontrol.c 5.48 KB