netprio_cgroup: define sk_cgrp_prioidx only if NETPRIO_CGROUP is enabled

sock->sk_cgrp_prioidx won't be used at all if CONFIG_NETPRIO_CGROUP=n.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sock.h b/include/net/sock.h
index 93a6745..182ca99 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -367,7 +367,7 @@ struct sock {
        unsigned short          sk_ack_backlog;
        unsigned short          sk_max_ack_backlog;
        __u32                   sk_priority;
-#ifdef CONFIG_CGROUPS
+#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
        __u32                   sk_cgrp_prioidx;
 #endif
        struct pid              *sk_peer_pid;