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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2008-07-25 01:45:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-25 10:53:27 -0700
commit696adfe84c11c571a1e0863460ff0ec142b4e5a9 (patch)
treef00042d0c69211955ec6ef3a5d4a5c49ec7f8890 /net/ipv4/af_inet.c
parent2fc9c4e18f94431e7eb77d97edb2a995b46fba55 (diff)
downloadblackbird-op-linux-696adfe84c11c571a1e0863460ff0ec142b4e5a9.tar.gz
blackbird-op-linux-696adfe84c11c571a1e0863460ff0ec142b4e5a9.zip
list_for_each_rcu must die: networking
All uses of list_for_each_rcu() can be profitably replaced by the easier-to-use list_for_each_entry_rcu(). This patch makes this change for networking, in preparation for removing the list_for_each_rcu() API entirely. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/ipv4/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index dd919d84285f..f440a9f54924 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -264,7 +264,6 @@ static inline int inet_netns_ok(struct net *net, int protocol)
static int inet_create(struct net *net, struct socket *sock, int protocol)
{
struct sock *sk;
- struct list_head *p;
struct inet_protosw *answer;
struct inet_sock *inet;
struct proto *answer_prot;
@@ -281,13 +280,12 @@ static int inet_create(struct net *net, struct socket *sock, int protocol)
sock->state = SS_UNCONNECTED;
/* Look for the requested type/protocol pair. */
- answer = NULL;
lookup_protocol:
err = -ESOCKTNOSUPPORT;
rcu_read_lock();
- list_for_each_rcu(p, &inetsw[sock->type]) {
- answer = list_entry(p, struct inet_protosw, list);
+ list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
+ err = 0;
/* Check the non-wild match. */
if (protocol == answer->protocol) {
if (protocol != IPPROTO_IP)
@@ -302,10 +300,9 @@ lookup_protocol:
break;
}
err = -EPROTONOSUPPORT;
- answer = NULL;
}
- if (unlikely(answer == NULL)) {
+ if (unlikely(err)) {
if (try_loading_module < 2) {
rcu_read_unlock();
/*
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