netprio_cgroup: convert away from cftype->read_map()

In preparation of conversion to kernfs, cgroup file handling is being
consolidated so that it can be easily mapped to the seq_file based
interface of kernfs.

cftype->read_map() doesn't add any value and being replaced with
->read_seq_string().  Update read_priomap() to use ->read_seq_string()
instead.

This patch doesn't make any visible behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Acked-by: Li Zefan <lizefan@huawei.com>

diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 9b7cf6c85f82447d3e03f33cd2c599de13ed3644..498710dce4a571794a1859aa9472ec57e18e12c7 100644 (file)
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -174,13 +174,13 @@ static u64 read_prioidx(struct cgroup_subsys_state *css, struct cftype *cft)
 }
 
 static int read_priomap(struct cgroup_subsys_state *css, struct cftype *cft,
-                       struct cgroup_map_cb *cb)
+                       struct seq_file *sf)
 {
        struct net_device *dev;
 
        rcu_read_lock();
        for_each_netdev_rcu(&init_net, dev)
-               cb->fill(cb, dev->name, netprio_prio(css, dev));
+               seq_printf(sf, "%s %u\n", dev->name, netprio_prio(css, dev));
        rcu_read_unlock();
        return 0;
 }
@@ -238,7 +238,7 @@ static struct cftype ss_files[] = {
        },
        {
                .name = "ifpriomap",
-               .read_map = read_priomap,
+               .read_seq_string = read_priomap,
                .write_string = write_priomap,
        },
        { }     /* terminate */