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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2008-07-25 01:45:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:27 -0700 |
| commit | 696adfe84c11c571a1e0863460ff0ec142b4e5a9 (patch) | |
| tree | f00042d0c69211955ec6ef3a5d4a5c49ec7f8890 /net/ipv4/af_inet.c | |
| parent | 2fc9c4e18f94431e7eb77d97edb2a995b46fba55 (diff) | |
| download | lwn-696adfe84c11c571a1e0863460ff0ec142b4e5a9.tar.gz lwn-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.c | 9 |
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(); /* |