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-rw-r--r--kernel/cgroup.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index dee025f2f286..48348dde6d81 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -702,7 +702,7 @@ static int rebind_subsystems(struct cgroupfs_root *root,
702 * any child cgroups exist. This is theoretically supportable 702 * any child cgroups exist. This is theoretically supportable
703 * but involves complex error handling, so it's being left until 703 * but involves complex error handling, so it's being left until
704 * later */ 704 * later */
705 if (!list_empty(&cgrp->children)) 705 if (root->number_of_cgroups > 1)
706 return -EBUSY; 706 return -EBUSY;
707 707
708 /* Process each subsystem */ 708 /* Process each subsystem */
@@ -1024,7 +1024,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
1024 if (ret == -EBUSY) { 1024 if (ret == -EBUSY) {
1025 mutex_unlock(&cgroup_mutex); 1025 mutex_unlock(&cgroup_mutex);
1026 mutex_unlock(&inode->i_mutex); 1026 mutex_unlock(&inode->i_mutex);
1027 goto drop_new_super; 1027 goto free_cg_links;
1028 } 1028 }
1029 1029
1030 /* EBUSY should be the only error here */ 1030 /* EBUSY should be the only error here */
@@ -1073,10 +1073,11 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
1073 1073
1074 return simple_set_mnt(mnt, sb); 1074 return simple_set_mnt(mnt, sb);
1075 1075
1076 free_cg_links:
1077 free_cg_links(&tmp_cg_links);
1076 drop_new_super: 1078 drop_new_super:
1077 up_write(&sb->s_umount); 1079 up_write(&sb->s_umount);
1078 deactivate_super(sb); 1080 deactivate_super(sb);
1079 free_cg_links(&tmp_cg_links);
1080 return ret; 1081 return ret;
1081} 1082}
1082 1083
@@ -2937,9 +2938,6 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
2937 again: 2938 again:
2938 root = subsys->root; 2939 root = subsys->root;
2939 if (root == &rootnode) { 2940 if (root == &rootnode) {
2940 printk(KERN_INFO
2941 "Not cloning cgroup for unused subsystem %s\n",
2942 subsys->name);
2943 mutex_unlock(&cgroup_mutex); 2941 mutex_unlock(&cgroup_mutex);
2944 return 0; 2942 return 0;
2945 } 2943 }