[PATCH 1/1] netfilter: Deletion of unnecessary checks before two function calls
From: SF Markus Elfring <hidden>
Date: 2014-11-18 19:48:05
Also in:
kernel-janitors, lvs-devel, netdev, netfilter-devel
Subsystem:
ipvs, netfilter, networking [general], the rest · Maintainers:
Simon Horman, Julian Anastasov, Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Markus Elfring <redacted> Date: Tue, 18 Nov 2014 20:37:05 +0100 The functions free_percpu() and module_put() test whether their argument is NULL and then return immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <redacted> --- net/netfilter/ipvs/ip_vs_ctl.c | 3 +-- net/netfilter/ipvs/ip_vs_pe.c | 3 +-- net/netfilter/ipvs/ip_vs_sched.c | 3 +-- net/netfilter/ipvs/ip_vs_sync.c | 3 +-- net/netfilter/nf_tables_api.c | 3 +-- 5 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index fd3f444..7c5e40a 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c@@ -465,8 +465,7 @@ __ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc) static void ip_vs_service_free(struct ip_vs_service *svc) { - if (svc->stats.cpustats) - free_percpu(svc->stats.cpustats); + free_percpu(svc->stats.cpustats); kfree(svc); }
diff --git a/net/netfilter/ipvs/ip_vs_pe.c b/net/netfilter/ipvs/ip_vs_pe.c
index 1a82b29..0df17ca 100644
--- a/net/netfilter/ipvs/ip_vs_pe.c
+++ b/net/netfilter/ipvs/ip_vs_pe.c@@ -37,8 +37,7 @@ struct ip_vs_pe *__ip_vs_pe_getbyname(const char *pe_name) rcu_read_unlock(); return pe; } - if (pe->module) - module_put(pe->module); + module_put(pe->module); } rcu_read_unlock();
diff --git a/net/netfilter/ipvs/ip_vs_sched.c b/net/netfilter/ipvs/ip_vs_sched.c
index 4dbcda6..199760c 100644
--- a/net/netfilter/ipvs/ip_vs_sched.c
+++ b/net/netfilter/ipvs/ip_vs_sched.c@@ -104,8 +104,7 @@ static struct ip_vs_scheduler *ip_vs_sched_getbyname(const char *sched_name) mutex_unlock(&ip_vs_sched_mutex); return sched; } - if (sched->module) - module_put(sched->module); + module_put(sched->module); } mutex_unlock(&ip_vs_sched_mutex);
diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index eadffb2..cafe28d 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c@@ -820,8 +820,7 @@ ip_vs_conn_fill_param_sync(struct net *net, int af, union ip_vs_sync_conn *sc, p->pe_data = kmemdup(pe_data, pe_data_len, GFP_ATOMIC); if (!p->pe_data) { - if (p->pe->module) - module_put(p->pe->module); + module_put(p->pe->module); return -ENOMEM; } p->pe_data_len = pe_data_len;
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index deeb95f..b115f54 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c@@ -3472,8 +3472,7 @@ static int nf_tables_abort(struct sk_buff *skb) break; case NFT_MSG_NEWCHAIN: if (nft_trans_chain_update(trans)) { - if (nft_trans_chain_stats(trans)) - free_percpu(nft_trans_chain_stats(trans)); + free_percpu(nft_trans_chain_stats(trans)); nft_trans_destroy(trans); } else {
--
2.1.3