diff options
| -rw-r--r-- | kernel/cgroup.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index cef688128fb8..f9c99abc38ab 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1425,14 +1425,15 @@ static void init_cgroup_root(struct cgroupfs_root *root) init_cgroup_housekeeping(cgrp); } -static int cgroup_init_root_id(struct cgroupfs_root *root) +static int cgroup_init_root_id(struct cgroupfs_root *root, int start, int end) { int id; lockdep_assert_held(&cgroup_mutex); lockdep_assert_held(&cgroup_root_mutex); - id = idr_alloc_cyclic(&cgroup_hierarchy_idr, root, 2, 0, GFP_KERNEL); + id = idr_alloc_cyclic(&cgroup_hierarchy_idr, root, start, end, + GFP_KERNEL); if (id < 0) return id; @@ -1635,7 +1636,8 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type, if (ret) goto unlock_drop; - ret = cgroup_init_root_id(root); + /* ID 0 is reserved for dummy root, 1 for unified hierarchy */ + ret = cgroup_init_root_id(root, 2, 0); if (ret) goto unlock_drop; @@ -4898,7 +4900,7 @@ int __init cgroup_init(void) key = css_set_hash(init_css_set.subsys); hash_add(css_set_table, &init_css_set.hlist, key); - BUG_ON(cgroup_init_root_id(&cgroup_dummy_root)); + BUG_ON(cgroup_init_root_id(&cgroup_dummy_root, 0, 1)); mutex_unlock(&cgroup_root_mutex); mutex_unlock(&cgroup_mutex); |