1 files changed, 38 insertions, 39 deletions

diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index e795272fbe9e..151703791bb0 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c
@@ -6,37 +6,6 @@
 #include <linux/memcontrol.h>
 #include <linux/module.h>
 
-static u64 tcp_cgroup_read(struct cgroup *cont, struct cftype *cft);
-static int tcp_cgroup_write(struct cgroup *cont, struct cftype *cft,
-                            const char *buffer);
-static int tcp_cgroup_reset(struct cgroup *cont, unsigned int event);
-
-static struct cftype tcp_files[] = {
-        {
-                .name = "kmem.tcp.limit_in_bytes",
-                .write_string = tcp_cgroup_write,
-                .read_u64 = tcp_cgroup_read,
-                .private = RES_LIMIT,
-        },
-        {
-                .name = "kmem.tcp.usage_in_bytes",
-                .read_u64 = tcp_cgroup_read,
-                .private = RES_USAGE,
-        },
-        {
-                .name = "kmem.tcp.failcnt",
-                .private = RES_FAILCNT,
-                .trigger = tcp_cgroup_reset,
-                .read_u64 = tcp_cgroup_read,
-        },
-        {
-                .name = "kmem.tcp.max_usage_in_bytes",
-                .private = RES_MAX_USAGE,
-                .trigger = tcp_cgroup_reset,
-                .read_u64 = tcp_cgroup_read,
-        },
-};
-
 static inline struct tcp_memcontrol *tcp_from_cgproto(struct cg_proto *cg_proto)
 {
         return container_of(cg_proto, struct tcp_memcontrol, cg_proto);
@@ -49,7 +18,7 @@ static void memcg_tcp_enter_memory_pressure(struct sock *sk)
 }
 EXPORT_SYMBOL(memcg_tcp_enter_memory_pressure);
 
-int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
+int tcp_init_cgroup(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
 {
         /*
          * The root cgroup does not use res_counters, but rather,
@@ -59,13 +28,12 @@ int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
         struct res_counter *res_parent = NULL;
         struct cg_proto *cg_proto, *parent_cg;
         struct tcp_memcontrol *tcp;
-        struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
         struct mem_cgroup *parent = parent_mem_cgroup(memcg);
         struct net *net = current->nsproxy->net_ns;
 
         cg_proto = tcp_prot.proto_cgroup(memcg);
         if (!cg_proto)
-                goto create_files;
+                return 0;
 
         tcp = tcp_from_cgproto(cg_proto);
 
@@ -88,15 +56,12 @@ int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss)
         cg_proto->sockets_allocated = &tcp->tcp_sockets_allocated;
         cg_proto->memcg = memcg;
 
-create_files:
-        return cgroup_add_files(cgrp, ss, tcp_files,
-                                ARRAY_SIZE(tcp_files));
+        return 0;
 }
 EXPORT_SYMBOL(tcp_init_cgroup);
 
-void tcp_destroy_cgroup(struct cgroup *cgrp)
+void tcp_destroy_cgroup(struct mem_cgroup *memcg)
 {
-        struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp);
         struct cg_proto *cg_proto;
         struct tcp_memcontrol *tcp;
         u64 val;
@@ -270,3 +235,37 @@ void tcp_prot_mem(struct mem_cgroup *memcg, long val, int idx)
 
         tcp->tcp_prot_mem[idx] = val;
 }
+
+static struct cftype tcp_files[] = {
+        {
+                .name = "kmem.tcp.limit_in_bytes",
+                .write_string = tcp_cgroup_write,
+                .read_u64 = tcp_cgroup_read,
+                .private = RES_LIMIT,
+        },
+        {
+                .name = "kmem.tcp.usage_in_bytes",
+                .read_u64 = tcp_cgroup_read,
+                .private = RES_USAGE,
+        },
+        {
+                .name = "kmem.tcp.failcnt",
+                .private = RES_FAILCNT,
+                .trigger = tcp_cgroup_reset,
+                .read_u64 = tcp_cgroup_read,
+        },
+        {
+                .name = "kmem.tcp.max_usage_in_bytes",
+                .private = RES_MAX_USAGE,
+                .trigger = tcp_cgroup_reset,
+                .read_u64 = tcp_cgroup_read,
+        },
+        { }     /* terminate */
+};
+
+static int __init tcp_memcontrol_init(void)
+{
+        WARN_ON(cgroup_add_cftypes(&mem_cgroup_subsys, tcp_files));
+        return 0;
+}
+__initcall(tcp_memcontrol_init);