From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [PATCH] kni: fix vhost-kni compile errors
Date: Mon, 11 Apr 2016 19:04:10 +0200
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Cc: dev@dpdk.org, Helin Zhang <helin.zhang@intel.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>
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2016-04-11 17:54, Ferruh Yigit:
> +#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0)
> +	    (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &q->sock->flags) &&
> +#else
>  	    (!test_and_set_bit(SOCK_ASYNC_NOSPACE, &q->sock->flags) &&
> +#endif

You could avoid some issues with backported feature by using
#ifdef SOCKWQ_ASYNC_NOSPACE