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authorWANG Cong <xiyou.wangcong@gmail.com>2013-12-16 08:15:11 +0400
committerDavid S. Miller <davem@davemloft.net>2013-12-18 21:52:08 +0400
commit3627287463b4acddb83d24fabb1e0a304e39565c (patch)
treee21fb125479524e1e2f765603283f2070cef80bc /net/sched/cls_api.c
parent1f747c26c48bb290c79c34e155860c7e2ec3926a (diff)
downloadlinux-3627287463b4acddb83d24fabb1e0a304e39565c.tar.xz
net_sched: convert tcf_proto_ops to use struct list_head
We don't need to maintain our own singly linked list code. Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_api.c')
-rw-r--r--net/sched/cls_api.c18
1 files changed, 8 insertions, 10 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 028c980ef87d..6b085cf27a65 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -31,8 +31,7 @@
#include <net/pkt_cls.h>
/* The list of all installed classifier types */
-
-static struct tcf_proto_ops *tcf_proto_base __read_mostly;
+static LIST_HEAD(tcf_proto_base);
/* Protects list of registered TC modules. It is pure SMP lock. */
static DEFINE_RWLOCK(cls_mod_lock);
@@ -45,7 +44,7 @@ static const struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind)
if (kind) {
read_lock(&cls_mod_lock);
- for (t = tcf_proto_base; t; t = t->next) {
+ list_for_each_entry(t, &tcf_proto_base, head) {
if (nla_strcmp(kind, t->kind) == 0) {
if (!try_module_get(t->owner))
t = NULL;
@@ -61,16 +60,15 @@ static const struct tcf_proto_ops *tcf_proto_lookup_ops(struct nlattr *kind)
int register_tcf_proto_ops(struct tcf_proto_ops *ops)
{
- struct tcf_proto_ops *t, **tp;
+ struct tcf_proto_ops *t;
int rc = -EEXIST;
write_lock(&cls_mod_lock);
- for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next)
+ list_for_each_entry(t, &tcf_proto_base, head)
if (!strcmp(ops->kind, t->kind))
goto out;
- ops->next = NULL;
- *tp = ops;
+ list_add_tail(&ops->head, &tcf_proto_base);
rc = 0;
out:
write_unlock(&cls_mod_lock);
@@ -80,17 +78,17 @@ EXPORT_SYMBOL(register_tcf_proto_ops);
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops)
{
- struct tcf_proto_ops *t, **tp;
+ struct tcf_proto_ops *t;
int rc = -ENOENT;
write_lock(&cls_mod_lock);
- for (tp = &tcf_proto_base; (t = *tp) != NULL; tp = &t->next)
+ list_for_each_entry(t, &tcf_proto_base, head)
if (t == ops)
break;
if (!t)
goto out;
- *tp = t->next;
+ list_del(&t->head);
rc = 0;
out:
write_unlock(&cls_mod_lock);