--- zzzz-none-000/linux-3.10.107/include/net/gro_cells.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/net/gro_cells.h	2021-02-04 17:41:59.000000000 +0000
@@ -8,25 +8,23 @@
 struct gro_cell {
 	struct sk_buff_head	napi_skbs;
 	struct napi_struct	napi;
-} ____cacheline_aligned_in_smp;
+};
 
 struct gro_cells {
-	unsigned int		gro_cells_mask;
-	struct gro_cell		*cells;
+	struct gro_cell __percpu	*cells;
 };
 
 static inline void gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
 {
-	struct gro_cell *cell = gcells->cells;
+	struct gro_cell *cell;
 	struct net_device *dev = skb->dev;
 
-	if (!cell || skb_cloned(skb) || !(dev->features & NETIF_F_GRO)) {
+	if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO)) {
 		netif_rx(skb);
 		return;
 	}
 
-	if (skb_rx_queue_recorded(skb))
-		cell += skb_get_rx_queue(skb) & gcells->gro_cells_mask;
+	cell = this_cpu_ptr(gcells->cells);
 
 	if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
 		atomic_long_inc(&dev->rx_dropped);
@@ -34,37 +32,28 @@
 		return;
 	}
 
-	/* We run in BH context */
-	spin_lock(&cell->napi_skbs.lock);
-
 	__skb_queue_tail(&cell->napi_skbs, skb);
 	if (skb_queue_len(&cell->napi_skbs) == 1)
 		napi_schedule(&cell->napi);
-
-	spin_unlock(&cell->napi_skbs.lock);
 }
 
-/* called unser BH context */
+/* called under BH context */
 static inline int gro_cell_poll(struct napi_struct *napi, int budget)
 {
 	struct gro_cell *cell = container_of(napi, struct gro_cell, napi);
 	struct sk_buff *skb;
 	int work_done = 0;
 
-	spin_lock(&cell->napi_skbs.lock);
 	while (work_done < budget) {
 		skb = __skb_dequeue(&cell->napi_skbs);
 		if (!skb)
 			break;
-		spin_unlock(&cell->napi_skbs.lock);
 		napi_gro_receive(napi, skb);
 		work_done++;
-		spin_lock(&cell->napi_skbs.lock);
 	}
 
 	if (work_done < budget)
-		napi_complete(napi);
-	spin_unlock(&cell->napi_skbs.lock);
+		napi_complete_done(napi, work_done);
 	return work_done;
 }
 
@@ -72,17 +61,14 @@
 {
 	int i;
 
-	gcells->gro_cells_mask = roundup_pow_of_two(netif_get_num_default_rss_queues()) - 1;
-	gcells->cells = kcalloc(gcells->gro_cells_mask + 1,
-				sizeof(struct gro_cell),
-				GFP_KERNEL);
+	gcells->cells = alloc_percpu(struct gro_cell);
 	if (!gcells->cells)
 		return -ENOMEM;
 
-	for (i = 0; i <= gcells->gro_cells_mask; i++) {
-		struct gro_cell *cell = gcells->cells + i;
+	for_each_possible_cpu(i) {
+		struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
 
-		skb_queue_head_init(&cell->napi_skbs);
+		__skb_queue_head_init(&cell->napi_skbs);
 		netif_napi_add(dev, &cell->napi, gro_cell_poll, 64);
 		napi_enable(&cell->napi);
 	}
@@ -91,16 +77,17 @@
 
 static inline void gro_cells_destroy(struct gro_cells *gcells)
 {
-	struct gro_cell *cell = gcells->cells;
 	int i;
 
-	if (!cell)
+	if (!gcells->cells)
 		return;
-	for (i = 0; i <= gcells->gro_cells_mask; i++,cell++) {
+	for_each_possible_cpu(i) {
+		struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
+
 		netif_napi_del(&cell->napi);
-		skb_queue_purge(&cell->napi_skbs);
+		__skb_queue_purge(&cell->napi_skbs);
 	}
-	kfree(gcells->cells);
+	free_percpu(gcells->cells);
 	gcells->cells = NULL;
 }