cgroup: remove cgroup_subsys->populate()

With memcg converted, cgroup_subsys->populate() doesn't have any user
left.  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 565c803..d3f5fba 100644 (file)
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -472,7 +472,6 @@ struct cgroup_subsys {
        void (*fork)(struct task_struct *task);
        void (*exit)(struct cgroup *cgrp, struct cgroup *old_cgrp,
                     struct task_struct *task);
-       int (*populate)(struct cgroup_subsys *ss, struct cgroup *cgrp);
        void (*post_clone)(struct cgroup *cgrp);
        void (*bind)(struct cgroup *root);
 

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 2905977..b2f203f 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3842,9 +3842,6 @@ static int cgroup_populate_dir(struct cgroup *cgrp)
        for_each_subsys(cgrp->root, ss) {
                struct cftype_set *set;
 
-               if (ss->populate && (err = ss->populate(ss, cgrp)) < 0)
-                       return err;
-
                list_for_each_entry(set, &ss->cftsets, node)
                        cgroup_addrm_files(cgrp, ss, set->cfts, true);
        }