[PATCH 2/2] Revert "l2tp: constify inet6_protocol structures"

[Julia Lawall]

This reverts commit d04916a48ad4a3db892b664fa9c3a2a693c378ad.

inet6_add_protocol and inet6_del_protocol include casts that remove the
effect of the const annotation on their parameter, leading to possible
runtime crashes.

Reported-by: Eric Dumazet <eric.duma...@gmail.com>
Signed-off-by: Julia Lawall <julia.law...@lip6.fr>

---

 net/l2tp/l2tp_ip6.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
index d2efcd9..88b397c 100644
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -788,7 +788,7 @@ static int l2tp_ip6_recvmsg(struct sock *sk, struct msghdr 
*msg, size_t len,
        .ops            = &l2tp_ip6_ops,
 };
 
-static const struct inet6_protocol l2tp_ip6_protocol = {
+static struct inet6_protocol l2tp_ip6_protocol __read_mostly = {
        .handler        = l2tp_ip6_recv,
 };