net: bpfilter: Fix type cast and pointer warnings

Fixes the following Sparse warnings:

net/bpfilter/bpfilter_kern.c:62:21: warning: cast removes address space
of expression
net/bpfilter/bpfilter_kern.c:101:49: warning: Using plain integer as
NULL pointer

Signed-off-by: Shanthosh RK <shanthosh.rk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
index f0fc182..b64e164 100644 (file)
--- a/net/bpfilter/bpfilter_kern.c
+++ b/net/bpfilter/bpfilter_kern.c
@@ -59,7 +59,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname,
        req.is_set = is_set;
        req.pid = current->pid;
        req.cmd = optname;
-       req.addr = (long)optval;
+       req.addr = (long __force __user)optval;
        req.len = optlen;
        mutex_lock(&bpfilter_lock);
        if (!info.pid)
@@ -98,7 +98,7 @@ static int __init load_umh(void)
        pr_info("Loaded bpfilter_umh pid %d\n", info.pid);
 
        /* health check that usermode process started correctly */
-       if (__bpfilter_process_sockopt(NULL, 0, 0, 0, 0) != 0) {
+       if (__bpfilter_process_sockopt(NULL, 0, NULL, 0, 0) != 0) {
                stop_umh();
                return -EFAULT;
        }