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Subject[PATCH 3/4] netprio_cgroup: use accessor to get id from css
Date
This is a prepared patch for converting from per-cgroup id to
per-subsystem id.

We should not access per-cgroup id directly, since this is
implemetation detail.

Use the accessor css_from_id() instead.

This patch has no functional change.

Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
---
net/core/netprio_cgroup.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index ce285c6..fc21035 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -89,7 +89,7 @@ static int extend_netdev_table(struct net_device *dev, u32 target_idx)
static u32 netprio_prio(struct cgroup_subsys_state *css, struct net_device *dev)
{
struct netprio_map *map = rcu_dereference_rtnl(dev->priomap);
- int id = css->cgroup->id;
+ int id = css_to_id(css);

if (map && id < map->priomap_len)
return map->priomap[id];
@@ -109,7 +109,7 @@ static int netprio_set_prio(struct cgroup_subsys_state *css,
struct net_device *dev, u32 prio)
{
struct netprio_map *map;
- int id = css->cgroup->id;
+ int id = css_to_id(css);
int ret;

/* avoid extending priomap for zero writes */
@@ -170,7 +170,7 @@ static void cgrp_css_free(struct cgroup_subsys_state *css)

static u64 read_prioidx(struct cgroup_subsys_state *css, struct cftype *cft)
{
- return css->cgroup->id;
+ return css_to_id(css);
}

static int read_priomap(struct seq_file *sf, void *v)
@@ -222,7 +222,7 @@ static void net_prio_attach(struct cgroup_subsys_state *css,
struct cgroup_taskset *tset)
{
struct task_struct *p;
- void *v = (void *)(unsigned long)css->cgroup->id;
+ void *v = (void *)(unsigned long)css_to_id(css);

cgroup_taskset_for_each(p, tset) {
task_lock(p);
--
2.0.0-rc0


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