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| author |   WANG Cong <xiyou.wangcong@gmail.com> | 2013-12-15 20:15:10 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2013-12-18 12:52:07 -0500 |
| commit | 1f747c26c48bb290c79c34e155860c7e2ec3926a (patch) | |
| tree | 0a821ed2e74aef2a9569656040f805d4c762e3ab /net/sched | |
| parent | net_sched: convert tcf_hashinfo to hlist and use spinlock (diff) | |
| download | linux-dev-1f747c26c48bb290c79c34e155860c7e2ec3926a.tar.xz linux-dev-1f747c26c48bb290c79c34e155860c7e2ec3926a.zip | |
net_sched: convert tc_action_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')
| -rw-r--r-- | net/sched/act_api.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c index dc457c957656..8114fef308d9 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -255,12 +255,12 @@ void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo) } EXPORT_SYMBOL(tcf_hash_insert); -static struct tc_action_ops *act_base = NULL; +static LIST_HEAD(act_base); static DEFINE_RWLOCK(act_mod_lock); int tcf_register_action(struct tc_action_ops *act) { - struct tc_action_ops *a, **ap; + struct tc_action_ops *a; /* Must supply act, dump, cleanup and init */ if (!act->act || !act->dump || !act->cleanup || !act->init) @@ -273,14 +273,13 @@ int tcf_register_action(struct tc_action_ops *act) act->walk = tcf_generic_walker; write_lock(&act_mod_lock); - for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) { + list_for_each_entry(a, &act_base, head) { if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) { write_unlock(&act_mod_lock); return -EEXIST; } } - act->next = NULL; - *ap = act; + list_add_tail(&act->head, &act_base); write_unlock(&act_mod_lock); return 0; } @@ -288,16 +287,15 @@ EXPORT_SYMBOL(tcf_register_action); int tcf_unregister_action(struct tc_action_ops *act) { - struct tc_action_ops *a, **ap; + struct tc_action_ops *a; int err = -ENOENT; write_lock(&act_mod_lock); - for (ap = &act_base; (a = *ap) != NULL; ap = &a->next) + list_for_each_entry(a, &act_base, head) if (a == act) break; if (a) { - *ap = a->next; - a->next = NULL; + list_del(&act->head); err = 0; } write_unlock(&act_mod_lock); @@ -312,7 +310,7 @@ static struct tc_action_ops *tc_lookup_action_n(char *kind) if (kind) { read_lock(&act_mod_lock); - for (a = act_base; a; a = a->next) { + list_for_each_entry(a, &act_base, head) { if (strcmp(kind, a->kind) == 0) { if (!try_module_get(a->owner)) { read_unlock(&act_mod_lock); @@ -333,7 +331,7 @@ static struct tc_action_ops *tc_lookup_action(struct nlattr *kind) if (kind) { read_lock(&act_mod_lock); - for (a = act_base; a; a = a->next) { + list_for_each_entry(a, &act_base, head) { if (nla_strcmp(kind, a->kind) == 0) { if (!try_module_get(a->owner)) { read_unlock(&act_mod_lock); |