1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a0123d75ec9a..8c6e1c17e6d3 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2735,6 +2735,8 @@ void cgroup_fork_callbacks(struct task_struct *child)
  * 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)
 {
@@ -2750,7 +2752,7 @@ void cgroup_mm_owner_callbacks(struct task_struct *old, struct task_struct *new)
                         if (oldcgrp == newcgrp)
                                 continue;
                         if (ss->mm_owner_changed)
-                                ss->mm_owner_changed(ss, oldcgrp, newcgrp);
+                                ss->mm_owner_changed(ss, oldcgrp, newcgrp, new);
                 }
         }
 }