cgroup: don't online subsystems before cgroup_name/path() are operational

While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out
cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems
before the new cgroup is associated with it kernfs_node.  This is fine
for cgroup proper but cgroup_name/path() depend on the associated
kernfs_node and if a subsystem makes the new cgroup_subsys_state
visible, which they're allowed to after onlining, it can lead to NULL
dereference.

The current code performs cgroup creation and subsystem onlining in
cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems
visible afterwards.  There's no reason to online the subsystems early
and we can simply drop cgroup_apply_control_enable() call from
cgroup_create() so that the subsystems are onlined and made visible at
the same time.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") 
Cc: stable@vger.kernel.org # v4.6+

path: root/include/dt-bindings/i2c/i2c.h

/*
 * This header provides constants for I2C bindings
 *
 * Copyright (C) 2015 by Sang Engineering
 * Copyright (C) 2015 by Renesas Electronics Corporation
 *
 * Wolfram Sang <wsa@sang-engineering.com>
 *
 * GPLv2 only
 */

#ifndef _DT_BINDINGS_I2C_I2C_H
#define _DT_BINDINGS_I2C_I2C_H

#define I2C_TEN_BIT_ADDRESS	(1 << 31)
#define I2C_OWN_SLAVE_ADDRESS	(1 << 30)

#endif