[PATCH bpf-next] selftest/bpf: fix compilation warning in sockmap_parse_prog.c

[Andrii Nakryiko <andriin@xxxxxx>]

Cast void * to long before casting to 32-bit __u32 to avoid compilation
warning.

Signed-off-by: Andrii Nakryiko <andriin@xxxxxx>
---
 tools/testing/selftests/bpf/progs/sockmap_parse_prog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/sockmap_parse_prog.c b/tools/testing/selftests/bpf/progs/sockmap_parse_prog.c
index a5c6d5903b22..a9c2bdbd841e 100644
--- a/tools/testing/selftests/bpf/progs/sockmap_parse_prog.c
+++ b/tools/testing/selftests/bpf/progs/sockmap_parse_prog.c
@@ -12,7 +12,7 @@ int bpf_prog1(struct __sk_buff *skb)
 	__u32 lport = skb->local_port;
 	__u32 rport = skb->remote_port;
 	__u8 *d = data;
-	__u32 len = (__u32) data_end - (__u32) data;
+	__u32 len = (__u32)(long)data_end - (__u32)(long)data;
 	int err;
 
 	if (data + 10 > data_end) {
-- 
2.17.1