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

Because opt_kfree_rcu() just calls kfree(), all call_rcu() uses of it
may be converted to kfree_rcu().  This permits 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

1 files changed, 3 insertions, 8 deletions

diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 86f3b885b4f3..c48adc565e92 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -1857,11 +1857,6 @@ static int cipso_v4_genopt(unsigned char *buf, u32 buf_len,
         return CIPSO_V4_HDR_LEN + ret_val;
 }
 
-static void opt_kfree_rcu(struct rcu_head *head)
-{
-        kfree(container_of(head, struct ip_options_rcu, rcu));
-}
-
 /**
  * cipso_v4_sock_setattr - Add a CIPSO option to a socket
  * @sk: the socket
@@ -1938,7 +1933,7 @@ int cipso_v4_sock_setattr(struct sock *sk,
         }
         rcu_assign_pointer(sk_inet->inet_opt, opt);
         if (old)
-                call_rcu(&old->rcu, opt_kfree_rcu);
+                kfree_rcu(old, rcu);
 
         return 0;
 
@@ -2005,7 +2000,7 @@ int cipso_v4_req_setattr(struct request_sock *req,
         req_inet = inet_rsk(req);
         opt = xchg(&req_inet->opt, opt);
         if (opt)
-                call_rcu(&opt->rcu, opt_kfree_rcu);
+                kfree_rcu(opt, rcu);
 
         return 0;
 
@@ -2075,7 +2070,7 @@ static int cipso_v4_delopt(struct ip_options_rcu **opt_ptr)
                  * remove the entire option struct */
                 *opt_ptr = NULL;
                 hdr_delta = opt->opt.optlen;
-                call_rcu(&opt->rcu, opt_kfree_rcu);
+                kfree_rcu(opt, rcu);
         }
 
         return hdr_delta;