Commit 676db4af authored by Greg KH's avatar Greg KH Committed by Greg Kroah-Hartman

cgroupfs: create /sys/fs/cgroup to mount cgroupfs on

We really shouldn't be asking userspace to create new root filesystems.
So follow along with all of the other in-kernel filesystems, and provide
a mount point in sysfs.

For cgroupfs, this should be in /sys/fs/cgroup/  This change provides
that mount point when the cgroup filesystem is registered in the kernel.
Acked-by: default avatarPaul Menage <>
Acked-by: default avatarDhaval Giani <>
Cc: Li Zefan <>
Cc: Lennart Poettering <>
Cc: Kay Sievers <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent 45daef0f
......@@ -1623,6 +1623,8 @@ static struct file_system_type cgroup_fs_type = {
.kill_sb = cgroup_kill_sb,
static struct kobject *cgroup_kobj;
static inline struct cgroup *__d_cgrp(struct dentry *dentry)
return dentry->d_fsdata;
......@@ -3894,9 +3896,18 @@ int __init cgroup_init(void)
hhead = css_set_hash(init_css_set.subsys);
hlist_add_head(&init_css_set.hlist, hhead);
cgroup_kobj = kobject_create_and_add("cgroup", fs_kobj);
if (!cgroup_kobj) {
err = -ENOMEM;
goto out;
err = register_filesystem(&cgroup_fs_type);
if (err < 0)
if (err < 0) {
goto out;
proc_create("cgroups", 0, NULL, &proc_cgroupstats_operations);
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