net: Make setsockopt() optlen be unsigned.

This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.

Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 1e166c9685aa..502cce76621d 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -370,7 +370,7 @@ void rose_destroy_socket(struct sock *sk)
  */
 
 static int rose_setsockopt(struct socket *sock, int level, int optname,
-        char __user *optval, int optlen)
+        char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         struct rose_sock *rose = rose_sk(sk);