From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Sat, 7 Jan 2012 01:08:33 +0000 (-0800)
Subject: ipv4: Convert call_rcu() to kfree_rcu(), drop opt_kfree_rcu
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=605b4afec8e51d0603089eac01a3ca9dd919e909;p=linux-beck.git

ipv4: Convert call_rcu() to kfree_rcu(), drop opt_kfree_rcu

The call_rcu() in do_ip_setsockopt() invokes opt_kfree_rcu(), which just
calls kfree().  So convert the call_rcu() to kfree_rcu(), which allows
opt_kfree_rcu() to be eliminated.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
---

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 8aa87c19fa00..5343d9ac510b 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -445,11 +445,6 @@ out:
 }
 
 
-static void opt_kfree_rcu(struct rcu_head *head)
-{
-	kfree(container_of(head, struct ip_options_rcu, rcu));
-}
-
 /*
  *	Socket option code for IP. This is the end of the line after any
  *	TCP,UDP etc options on an IP socket.
@@ -525,7 +520,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
 		}
 		rcu_assign_pointer(inet->inet_opt, opt);
 		if (old)
-			call_rcu(&old->rcu, opt_kfree_rcu);
+			kfree_rcu(old, rcu);
 		break;
 	}
 	case IP_PKTINFO: