10 files changed, 16 insertions, 173 deletions

diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c
index 2b4b4f529ab4..16814b34d4b6 100644
--- a/drivers/net/ethernet/calxeda/xgmac.c
+++ b/drivers/net/ethernet/calxeda/xgmac.c
@@ -375,7 +375,6 @@ struct xgmac_priv {
 	unsigned int tx_tail;
 
 	void __iomem *base;
-	struct sk_buff_head rx_recycle;
 	unsigned int dma_buf_sz;
 	dma_addr_t dma_rx_phy;
 	dma_addr_t dma_tx_phy;
@@ -672,9 +671,7 @@ static void xgmac_rx_refill(struct xgmac_priv *priv)
 		p = priv->dma_rx + entry;
 
 		if (priv->rx_skbuff[entry] == NULL) {
-			skb = __skb_dequeue(&priv->rx_recycle);
-			if (skb == NULL)
-				skb = netdev_alloc_skb(priv->dev, priv->dma_buf_sz);
+			skb = netdev_alloc_skb(priv->dev, priv->dma_buf_sz);
 			if (unlikely(skb == NULL))
 				break;
 
@@ -887,17 +884,7 @@ static void xgmac_tx_complete(struct xgmac_priv *priv)
 				       desc_get_buf_len(p), DMA_TO_DEVICE);
 		}
 
-		/*
-		 * If there's room in the queue (limit it to size)
-		 * we add this skb back into the pool,
-		 * if it's the right size.
-		 */
-		if ((skb_queue_len(&priv->rx_recycle) <
-			DMA_RX_RING_SZ) &&
-			skb_recycle_check(skb, priv->dma_buf_sz))
-			__skb_queue_head(&priv->rx_recycle, skb);
-		else
-			dev_kfree_skb(skb);
+		dev_kfree_skb(skb);
 	}
 
 	if (dma_ring_space(priv->tx_head, priv->tx_tail, DMA_TX_RING_SZ) >
@@ -1016,7 +1003,6 @@ static int xgmac_open(struct net_device *dev)
 			dev->dev_addr);
 	}
 
-	skb_queue_head_init(&priv->rx_recycle);
 	memset(&priv->xstats, 0, sizeof(struct xgmac_extra_stats));
 
 	/* Initialize the XGMAC and descriptors */
@@ -1053,7 +1039,6 @@ static int xgmac_stop(struct net_device *dev)
 		napi_disable(&priv->napi);
 
 	writel(0, priv->base + XGMAC_DMA_INTR_ENA);
-	skb_queue_purge(&priv->rx_recycle);
 
 	/* Disable the MAC core */
 	xgmac_mac_disable(priv->base);
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index a1b52ec3b930..1d03dcdd5e56 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -1765,7 +1765,6 @@ static void free_skb_resources(struct gfar_private *priv)
 			  sizeof(struct rxbd8) * priv->total_rx_ring_size,
 			  priv->tx_queue[0]->tx_bd_base,
 			  priv->tx_queue[0]->tx_bd_dma_base);
-	skb_queue_purge(&priv->rx_recycle);
 }
 
 void gfar_start(struct net_device *dev)
@@ -1943,8 +1942,6 @@ static int gfar_enet_open(struct net_device *dev)
 
 	enable_napi(priv);
 
-	skb_queue_head_init(&priv->rx_recycle);
-
 	/* Initialize a bunch of registers */
 	init_registers(dev);
 
@@ -2533,16 +2530,7 @@ static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue)
 
 		bytes_sent += skb->len;
 
-		/* If there's room in the queue (limit it to rx_buffer_size)
-		 * we add this skb back into the pool, if it's the right size
-		 */
-		if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size &&
-		    skb_recycle_check(skb, priv->rx_buffer_size +
-				      RXBUF_ALIGNMENT)) {
-			gfar_align_skb(skb);
-			skb_queue_head(&priv->rx_recycle, skb);
-		} else
-			dev_kfree_skb_any(skb);
+		dev_kfree_skb_any(skb);
 
 		tx_queue->tx_skbuff[skb_dirtytx] = NULL;
 
@@ -2608,7 +2596,7 @@ static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp,
 static struct sk_buff *gfar_alloc_skb(struct net_device *dev)
 {
 	struct gfar_private *priv = netdev_priv(dev);
-	struct sk_buff *skb = NULL;
+	struct sk_buff *skb;
 
 	skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
 	if (!skb)
@@ -2621,14 +2609,7 @@ static struct sk_buff *gfar_alloc_skb(struct net_device *dev)
 
 struct sk_buff *gfar_new_skb(struct net_device *dev)
 {
-	struct gfar_private *priv = netdev_priv(dev);
-	struct sk_buff *skb = NULL;
-
-	skb = skb_dequeue(&priv->rx_recycle);
-	if (!skb)
-		skb = gfar_alloc_skb(dev);
-
-	return skb;
+	return gfar_alloc_skb(dev);
 }
 
 static inline void count_errors(unsigned short status, struct net_device *dev)
@@ -2787,7 +2768,7 @@ int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit)
 			if (unlikely(!newskb))
 				newskb = skb;
 			else if (skb)
-				skb_queue_head(&priv->rx_recycle, skb);
+				dev_kfree_skb(skb);
 		} else {
 			/* Increment the number of packets */
 			rx_queue->stats.rx_packets++;
diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index 4141ef2ddafc..22eabc13ca99 100644
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -1080,8 +1080,6 @@ struct gfar_private {
 
 	u32 cur_filer_idx;
 
-	struct sk_buff_head rx_recycle;
-
 	/* RX queue filer rule set*/
 	struct ethtool_rx_list rx_list;
 	struct mutex rx_queue_access;
diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index 164288439220..dfa0aaaab009 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -209,14 +209,12 @@ static struct list_head *dequeue(struct list_head *lh)
 static struct sk_buff *get_new_skb(struct ucc_geth_private *ugeth,
 		u8 __iomem *bd)
 {
-	struct sk_buff *skb = NULL;
+	struct sk_buff *skb;
 
-	skb = __skb_dequeue(&ugeth->rx_recycle);
+	skb = netdev_alloc_skb(ugeth->ndev,
+			       ugeth->ug_info->uf_info.max_rx_buf_length +
+			       UCC_GETH_RX_DATA_BUF_ALIGNMENT);
 	if (!skb)
-		skb = netdev_alloc_skb(ugeth->ndev,
-				      ugeth->ug_info->uf_info.max_rx_buf_length +
-				      UCC_GETH_RX_DATA_BUF_ALIGNMENT);
-	if (skb == NULL)
 		return NULL;
 
 	/* We need the data buffer to be aligned properly.  We will reserve
@@ -2020,8 +2018,6 @@ static void ucc_geth_memclean(struct ucc_geth_private *ugeth)
 		iounmap(ugeth->ug_regs);
 		ugeth->ug_regs = NULL;
 	}
-
-	skb_queue_purge(&ugeth->rx_recycle);
 }
 
 static void ucc_geth_set_multi(struct net_device *dev)
@@ -2230,8 +2226,6 @@ static int ucc_struct_init(struct ucc_geth_private *ugeth)
 		return -ENOMEM;
 	}
 
-	skb_queue_head_init(&ugeth->rx_recycle);
-
 	return 0;
 }
 
@@ -3274,12 +3268,7 @@ static int ucc_geth_rx(struct ucc_geth_private *ugeth, u8 rxQ, int rx_work_limit
 			if (netif_msg_rx_err(ugeth))
 				ugeth_err("%s, %d: ERROR!!! skb - 0x%08x",
 					   __func__, __LINE__, (u32) skb);
-			if (skb) {
-				skb->data = skb->head + NET_SKB_PAD;
-				skb->len = 0;
-				skb_reset_tail_pointer(skb);
-				__skb_queue_head(&ugeth->rx_recycle, skb);
-			}
+			dev_free_skb(skb);
 
 			ugeth->rx_skbuff[rxQ][ugeth->skb_currx[rxQ]] = NULL;
 			dev->stats.rx_dropped++;
@@ -3349,13 +3338,7 @@ static int ucc_geth_tx(struct net_device *dev, u8 txQ)
 
 		dev->stats.tx_packets++;
 
-		if (skb_queue_len(&ugeth->rx_recycle) < RX_BD_RING_LEN &&
-			     skb_recycle_check(skb,
-				    ugeth->ug_info->uf_info.max_rx_buf_length +
-				    UCC_GETH_RX_DATA_BUF_ALIGNMENT))
-			__skb_queue_head(&ugeth->rx_recycle, skb);
-		else
-			dev_kfree_skb(skb);
+		dev_kfree_skb(skb);
 
 		ugeth->tx_skbuff[txQ][ugeth->skb_dirtytx[txQ]] = NULL;
 		ugeth->skb_dirtytx[txQ] =
diff --git a/drivers/net/ethernet/freescale/ucc_geth.h b/drivers/net/ethernet/freescale/ucc_geth.h
index f71b3e7b12de..75f337163ce3 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.h
+++ b/drivers/net/ethernet/freescale/ucc_geth.h
@@ -1214,8 +1214,6 @@ struct ucc_geth_private {
 	/* index of the first skb which hasn't been transmitted yet. */
 	u16 skb_dirtytx[NUM_TX_QUEUES];
 
-	struct sk_buff_head rx_recycle;
-
 	struct ugeth_mii_info *mii_info;
 	struct phy_device *phydev;
 	phy_interface_t phy_interface;
diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index 087b9e0669f1..84c13263c514 100644
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -412,7 +412,6 @@ struct mv643xx_eth_private {
 	u8 work_rx_refill;
 
 	int skb_size;
-	struct sk_buff_head rx_recycle;
 
 	/*
 	 * RX state.
@@ -673,9 +672,7 @@ static int rxq_refill(struct rx_queue *rxq, int budget)
 		struct rx_desc *rx_desc;
 		int size;
 
-		skb = __skb_dequeue(&mp->rx_recycle);
-		if (skb == NULL)
-			skb = netdev_alloc_skb(mp->dev, mp->skb_size);
+		skb = netdev_alloc_skb(mp->dev, mp->skb_size);
 
 		if (skb == NULL) {
 			mp->oom = 1;
@@ -989,14 +986,7 @@ static int txq_reclaim(struct tx_queue *txq, int budget, int force)
 				       desc->byte_cnt, DMA_TO_DEVICE);
 		}
 
-		if (skb != NULL) {
-			if (skb_queue_len(&mp->rx_recycle) <
-					mp->rx_ring_size &&
-			    skb_recycle_check(skb, mp->skb_size))
-				__skb_queue_head(&mp->rx_recycle, skb);
-			else
-				dev_kfree_skb(skb);
-		}
+		dev_kfree_skb(skb);
 	}
 
 	__netif_tx_unlock(nq);
@@ -2349,8 +2339,6 @@ static int mv643xx_eth_open(struct net_device *dev)
 
 	napi_enable(&mp->napi);
 
-	skb_queue_head_init(&mp->rx_recycle);
-
 	mp->int_mask = INT_EXT;
 
 	for (i = 0; i < mp->rxq_count; i++) {
@@ -2445,8 +2433,6 @@ static int mv643xx_eth_stop(struct net_device *dev)
 	mib_counters_update(mp);
 	del_timer_sync(&mp->mib_counters_timer);
 
-	skb_queue_purge(&mp->rx_recycle);
-
 	for (i = 0; i < mp->rxq_count; i++)
 		rxq_deinit(mp->rxq + i);
 	for (i = 0; i < mp->txq_count; i++)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index e872e1da3137..7d51a65ab099 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -50,7 +50,6 @@ struct stmmac_priv {
 	unsigned int dirty_rx;
 	struct sk_buff **rx_skbuff;
 	dma_addr_t *rx_skbuff_dma;
-	struct sk_buff_head rx_recycle;
 
 	struct net_device *dev;
 	dma_addr_t dma_rx_phy;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3be88331d17a..c6cdbc4eb05e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -747,18 +747,7 @@ static void stmmac_tx(struct stmmac_priv *priv)
 		priv->hw->ring->clean_desc3(p);
 
 		if (likely(skb != NULL)) {
-			/*
-			 * If there's room in the queue (limit it to size)
-			 * we add this skb back into the pool,
-			 * if it's the right size.
-			 */
-			if ((skb_queue_len(&priv->rx_recycle) <
-				priv->dma_rx_size) &&
-				skb_recycle_check(skb, priv->dma_buf_sz))
-				__skb_queue_head(&priv->rx_recycle, skb);
-			else
-				dev_kfree_skb(skb);
-
+			dev_kfree_skb(skb);
 			priv->tx_skbuff[entry] = NULL;
 		}
 
@@ -1169,7 +1158,6 @@ static int stmmac_open(struct net_device *dev)
 	priv->eee_enabled = stmmac_eee_init(priv);
 
 	napi_enable(&priv->napi);
-	skb_queue_head_init(&priv->rx_recycle);
 	netif_start_queue(dev);
 
 	return 0;
@@ -1222,7 +1210,6 @@ static int stmmac_release(struct net_device *dev)
 		kfree(priv->tm);
 #endif
 	napi_disable(&priv->napi);
-	skb_queue_purge(&priv->rx_recycle);
 
 	/* Free the IRQ lines */
 	free_irq(dev->irq, dev);
@@ -1388,10 +1375,7 @@ static inline void stmmac_rx_refill(struct stmmac_priv *priv)
 		if (likely(priv->rx_skbuff[entry] == NULL)) {
 			struct sk_buff *skb;
 
-			skb = __skb_dequeue(&priv->rx_recycle);
-			if (skb == NULL)
-				skb = netdev_alloc_skb_ip_align(priv->dev,
-								bfsize);
+			skb = netdev_alloc_skb_ip_align(priv->dev, bfsize);
 
 			if (unlikely(skb == NULL))
 				break;
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index b33a3a1f205e..6a2c34e6d962 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -589,9 +589,6 @@ static inline struct sk_buff *alloc_skb_fclone(unsigned int size,
 	return __alloc_skb(size, priority, SKB_ALLOC_FCLONE, NUMA_NO_NODE);
 }
 
-extern void skb_recycle(struct sk_buff *skb);
-extern bool skb_recycle_check(struct sk_buff *skb, int skb_size);
-
 extern struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src);
 extern int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask);
 extern struct sk_buff *skb_clone(struct sk_buff *skb,
@@ -2645,27 +2642,6 @@ static inline void skb_checksum_none_assert(const struct sk_buff *skb)
 
 bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off);
 
-static inline bool skb_is_recycleable(const struct sk_buff *skb, int skb_size)
-{
-	if (irqs_disabled())
-		return false;
-
-	if (skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY)
-		return false;
-
-	if (skb_is_nonlinear(skb) || skb->fclone != SKB_FCLONE_UNAVAILABLE)
-		return false;
-
-	skb_size = SKB_DATA_ALIGN(skb_size + NET_SKB_PAD);
-	if (skb_end_offset(skb) < skb_size)
-		return false;
-
-	if (skb_shared(skb) || skb_cloned(skb))
-		return false;
-
-	return true;
-}
-
 /**
  * skb_head_is_locked - Determine if the skb->head is locked down
  * @skb: skb to check
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index cdc28598f4ef..6e04b1fa11f2 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -655,53 +655,6 @@ void consume_skb(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(consume_skb);
 
-/**
- * 	skb_recycle - clean up an skb for reuse
- * 	@skb: buffer
- *
- * 	Recycles the skb to be reused as a receive buffer. This
- * 	function does any necessary reference count dropping, and
- * 	cleans up the skbuff as if it just came from __alloc_skb().
- */
-void skb_recycle(struct sk_buff *skb)
-{
-	struct skb_shared_info *shinfo;
-
-	skb_release_head_state(skb);
-
-	shinfo = skb_shinfo(skb);
-	memset(shinfo, 0, offsetof(struct skb_shared_info, dataref));
-	atomic_set(&shinfo->dataref, 1);
-
-	memset(skb, 0, offsetof(struct sk_buff, tail));
-	skb->data = skb->head + NET_SKB_PAD;
-	skb_reset_tail_pointer(skb);
-}
-EXPORT_SYMBOL(skb_recycle);
-
-/**
- *	skb_recycle_check - check if skb can be reused for receive
- *	@skb: buffer
- *	@skb_size: minimum receive buffer size
- *
- *	Checks that the skb passed in is not shared or cloned, and
- *	that it is linear and its head portion at least as large as
- *	skb_size so that it can be recycled as a receive buffer.
- *	If these conditions are met, this function does any necessary
- *	reference count dropping and cleans up the skbuff as if it
- *	just came from __alloc_skb().
- */
-bool skb_recycle_check(struct sk_buff *skb, int skb_size)
-{
-	if (!skb_is_recycleable(skb, skb_size))
-		return false;
-
-	skb_recycle(skb);
-
-	return true;
-}
-EXPORT_SYMBOL(skb_recycle_check);
-
 static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
 {
 	new->tstamp		= old->tstamp;