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authorWANG Cong <xiyou.wangcong@gmail.com>2017-04-19 14:21:22 -0700
committerDavid S. Miller <davem@davemloft.net>2017-04-21 13:58:15 -0400
commit4392053879717edb0c4756a3878c0274267e237b (patch)
tree4b6135513c77437534060999f462638e4766beb3 /net/sched/cls_route.c
parentnet_sched: move the empty tp check from ->destroy() to ->delete() (diff)
downloadlinux-dev-4392053879717edb0c4756a3878c0274267e237b.tar.xz
linux-dev-4392053879717edb0c4756a3878c0274267e237b.zip
net_sched: remove useless NULL to tp->root
There is no need to NULL tp->root in ->destroy(), since tp is going to be freed very soon, and existing readers are still safe to read them. For cls_route, we always init its tp->root, so it can't be NULL, we can drop more useless code. Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/cls_route.c')
-rw-r--r--net/sched/cls_route.c15
1 files changed, 0 insertions, 15 deletions
diff --git a/net/sched/cls_route.c b/net/sched/cls_route.c
index f4d687e04240..d63d5502ee02 100644
--- a/net/sched/cls_route.c
+++ b/net/sched/cls_route.c
@@ -140,8 +140,6 @@ static int route4_classify(struct sk_buff *skb, const struct tcf_proto *tp,
goto failure;
id = dst->tclassid;
- if (head == NULL)
- goto old_method;
iif = inet_iif(skb);
@@ -194,15 +192,6 @@ restart:
route4_set_fastmap(head, id, iif, ROUTE4_FAILURE);
failure:
return -1;
-
-old_method:
- if (id && (TC_H_MAJ(id) == 0 ||
- !(TC_H_MAJ(id^tp->q->handle)))) {
- res->classid = id;
- res->class = 0;
- return 0;
- }
- return -1;
}
static inline u32 to_hash(u32 id)
@@ -234,9 +223,6 @@ static unsigned long route4_get(struct tcf_proto *tp, u32 handle)
struct route4_filter *f;
unsigned int h1, h2;
- if (!head)
- return 0;
-
h1 = to_hash(handle);
if (h1 > 256)
return 0;
@@ -305,7 +291,6 @@ static void route4_destroy(struct tcf_proto *tp)
kfree_rcu(b, rcu);
}
}
- RCU_INIT_POINTER(tp->root, NULL);
kfree_rcu(head, rcu);
}