Revert "cgroup: remove bind() method from cgroup_subsys."
This reverts commit 84cfb6ab484b442d5115eb3baf9db7d74a3ea626. There
are scheduled changes which make use of the removed callback.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rami Rosen <ramirose@gmail.com>
Cc: Li Zefan <lizefan@huawei.com>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7bf3ce0..678a22c 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1091,12 +1091,16 @@
cgrp->subsys[i]->cgroup = cgrp;
list_move(&ss->sibling, &root->subsys_list);
ss->root = root;
+ if (ss->bind)
+ ss->bind(cgrp);
/* refcount was already taken, and we're keeping it */
} else if (bit & removed_mask) {
/* We're removing this subsystem */
BUG_ON(ss == NULL);
BUG_ON(cgrp->subsys[i] != dummytop->subsys[i]);
BUG_ON(cgrp->subsys[i]->cgroup != cgrp);
+ if (ss->bind)
+ ss->bind(dummytop);
dummytop->subsys[i]->cgroup = dummytop;
cgrp->subsys[i] = NULL;
subsys[i]->root = &rootnode;