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>
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@ -367,7 +367,7 @@ struct sock {
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unsigned short sk_ack_backlog;
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unsigned short sk_max_ack_backlog;
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__u32 sk_priority;
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#ifdef CONFIG_CGROUPS
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#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
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__u32 sk_cgrp_prioidx;
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#endif
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struct pid *sk_peer_pid;
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