decnet: fix using plain integer as NULL warning

Fixes the following sparse warning:
net/decnet/dn_route.c:407:30: warning: Using plain integer as NULL pointer
net/decnet/dn_route.c:1923:22: warning: Using plain integer as NULL pointer

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 3107a2e24e6b..1c002c0fb712 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -404,7 +404,7 @@ void dn_rt_cache_flush(int delay)
 
         if (delay <= 0) {
                 spin_unlock_bh(&dn_rt_flush_lock);
-                dn_run_flush(0);
+                dn_run_flush(NULL);
                 return;
         }
 
@@ -1920,7 +1920,7 @@ void __init dn_route_init(void)
 void __exit dn_route_cleanup(void)
 {
         del_timer(&dn_route_timer);
-        dn_run_flush(0);
+        dn_run_flush(NULL);
 
         remove_proc_entry("decnet_cache", init_net.proc_net);
         dst_entries_destroy(&dn_dst_ops);