[PATCH] cgroup: remove bind() method from cgroup_subsys.

[Rami Rosen <ramirose-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

The bind() method of cgroup_subsys is not used in any of the controllers
(cpuset, freezer, blkio, net_cls, memcg, net_prio, devices, perf, hugetlb, 
cpu and cpuacct)

Signed-off-by: Rami Rosen <ramirose-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 include/linux/cgroup.h | 2 --
 kernel/cgroup.c        | 4 ----
 2 files changed, 6 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 515927e..92acf86 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -483,8 +483,6 @@ struct cgroup_subsys {
 	void (*fork)(struct task_struct *task);
 	void (*exit)(struct cgroup *cgrp, struct cgroup *old_cgrp,
 		     struct task_struct *task);
-	void (*bind)(struct cgroup *root);
-
 	int subsys_id;
 	int active;
 	int disabled;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index ba3e24a..fd38e1c 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1064,16 +1064,12 @@ static int rebind_subsystems(struct cgroupfs_root *root,
 			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;
-- 
1.8.1.4