1 files changed, 0 insertions, 33 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 87bb0258fd27..f221446aa02d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -116,7 +116,6 @@ static int root_count;
  * be called.
  */
 static int need_forkexit_callback __read_mostly;
-static int need_mm_owner_callback __read_mostly;
 
 /* convenient tests for these bits */
 inline int cgroup_is_removed(const struct cgroup *cgrp)
@@ -2539,7 +2538,6 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
         init_css_set.subsys[ss->subsys_id] = dummytop->subsys[ss->subsys_id];
 
         need_forkexit_callback |= ss->fork || ss->exit;
-        need_mm_owner_callback |= !!ss->mm_owner_changed;
 
         /* At system boot, before all subsystems have been
          * registered, no tasks have been forked, so we don't
@@ -2789,37 +2787,6 @@ void cgroup_fork_callbacks(struct task_struct *child)
         }
 }
 
-#ifdef CONFIG_MM_OWNER
-/**
- * cgroup_mm_owner_callbacks - run callbacks when the mm->owner changes
- * @p: the new owner
- *
- * Called on every change to mm->owner. mm_init_owner() does not
- * invoke this routine, since it assigns the mm->owner the first time
- * and does not change it.
- *
- * The callbacks are invoked with mmap_sem held in read mode.
- */
-void cgroup_mm_owner_callbacks(struct task_struct *old, struct task_struct *new)
-{
-        struct cgroup *oldcgrp, *newcgrp = NULL;
-
-        if (need_mm_owner_callback) {
-                int i;
-                for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) {
-                        struct cgroup_subsys *ss = subsys[i];
-                        oldcgrp = task_cgroup(old, ss->subsys_id);
-                        if (new)
-                                newcgrp = task_cgroup(new, ss->subsys_id);
-                        if (oldcgrp == newcgrp)
-                                continue;
-                        if (ss->mm_owner_changed)
-                                ss->mm_owner_changed(ss, oldcgrp, newcgrp, new);
-                }
-        }
-}
-#endif /* CONFIG_MM_OWNER */
-
 /**
  * cgroup_post_fork - called on a new task after adding it to the task list
  * @child: the task in question