netprio_cgroup: use cgroup->id instead of cgroup_netprio_state->prioidx
With priomap expansion no longer depending on knowing max id
allocated, netprio_cgroup can use cgroup->id insted of cs->prioidx.
Drop prioidx alloc/free logic and convert all uses to cgroup->id.
* In cgrp_css_alloc(), parent->id test is moved above @cs allocation
to simplify error path.
* In cgrp_css_free(), @cs assignment is made initialization.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Tested-and-Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Acked-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netprio_cgroup.h b/include/net/netprio_cgroup.h
index 2760f4f..1d04b6f 100644
--- a/include/net/netprio_cgroup.h
+++ b/include/net/netprio_cgroup.h
@@ -27,7 +27,6 @@
struct cgroup_netprio_state {
struct cgroup_subsys_state css;
- u32 prioidx;
};
extern void sock_update_netprioidx(struct sock *sk, struct task_struct *task);
@@ -36,13 +35,12 @@
static inline u32 task_netprioidx(struct task_struct *p)
{
- struct cgroup_netprio_state *state;
+ struct cgroup_subsys_state *css;
u32 idx;
rcu_read_lock();
- state = container_of(task_subsys_state(p, net_prio_subsys_id),
- struct cgroup_netprio_state, css);
- idx = state->prioidx;
+ css = task_subsys_state(p, net_prio_subsys_id);
+ idx = css->cgroup->id;
rcu_read_unlock();
return idx;
}
@@ -57,8 +55,7 @@
rcu_read_lock();
css = task_subsys_state(p, net_prio_subsys_id);
if (css)
- idx = container_of(css,
- struct cgroup_netprio_state, css)->prioidx;
+ idx = css->cgroup->id;
rcu_read_unlock();
return idx;
}