!1833 xsk: Initialise xskb free_list_node

Merge Pull Request from: @ci-robot 
 
PR sync from: Zhengchao Shao <shaozhengchao@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/GBQXYXZQPJDLMM27FLPPRC4UEJD35FWC/ 
 
https://gitee.com/openeuler/kernel/issues/I7UZT5 
 
Link:https://gitee.com/openeuler/kernel/pulls/1833 

Reviewed-by: Yue Haibing <yuehaibing@huawei.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

net/xdp/xsk_buff_pool.c

@@ -81,6 +81,7 @@ struct xsk_buff_pool *xp_create_and_assign_umem(struct xdp_sock *xs,
 		xskb = &pool->heads[i];
 		xskb->pool = pool;
 		xskb->xdp.frame_sz = umem->chunk_size - umem->headroom;
+		INIT_LIST_HEAD(&xskb->free_list_node);
 		pool->free_heads[i] = xskb;
 	}