sfc: Delete EFX_PAGE_IP_ALIGN, equivalent to NET_IP_ALIGN

The two architectures that define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
(powerpc and x86) now both define NET_IP_ALIGN as 0, so there is no
need for this optimisation any more.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/efx.c

@@ -638,13 +638,13 @@ static void efx_start_datapath(struct efx_nic *efx)
 			   EFX_MAX_FRAME_LEN(efx->net_dev->mtu) +
 			   efx->type->rx_buffer_padding);
 	rx_buf_len = (sizeof(struct efx_rx_page_state) +
-		      EFX_PAGE_IP_ALIGN + efx->rx_dma_len);
+		      NET_IP_ALIGN + efx->rx_dma_len);
 	if (rx_buf_len <= PAGE_SIZE) {
 		efx->rx_scatter = false;
 		efx->rx_buffer_order = 0;
 	} else if (efx->type->can_rx_scatter) {
 		BUILD_BUG_ON(sizeof(struct efx_rx_page_state) +
-			     EFX_PAGE_IP_ALIGN + EFX_RX_USR_BUF_SIZE >
+			     NET_IP_ALIGN + EFX_RX_USR_BUF_SIZE >
 			     PAGE_SIZE / 2);
 		efx->rx_scatter = true;
 		efx->rx_dma_len = EFX_RX_USR_BUF_SIZE;

drivers/net/ethernet/sfc/net_driver.h

@@ -467,25 +467,12 @@ enum nic_state {
 	STATE_RECOVERY = 3,	/* device recovering from PCI error */
 };
 
-/*
- * Alignment of page-allocated RX buffers
- *
- * Controls the number of bytes inserted at the start of an RX buffer.
- * This is the equivalent of NET_IP_ALIGN [which controls the alignment
- * of the skb->head for hardware DMA].
- */
-#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
-#define EFX_PAGE_IP_ALIGN 0
-#else
-#define EFX_PAGE_IP_ALIGN NET_IP_ALIGN
-#endif
-
 /*
  * Alignment of the skb->head which wraps a page-allocated RX buffer
  *
  * The skb allocated to wrap an rx_buffer can have this alignment. Since
  * the data is memcpy'd from the rx_buf, it does not need to be equal to
- * EFX_PAGE_IP_ALIGN.
+ * NET_IP_ALIGN.
  */
 #define EFX_PAGE_SKB_ALIGN 2
 

drivers/net/ethernet/sfc/rx.c

@@ -93,7 +93,7 @@ static inline void efx_sync_rx_buffer(struct efx_nic *efx,
 
 void efx_rx_config_page_split(struct efx_nic *efx)
 {
-	efx->rx_page_buf_step = ALIGN(efx->rx_dma_len + EFX_PAGE_IP_ALIGN,
+	efx->rx_page_buf_step = ALIGN(efx->rx_dma_len + NET_IP_ALIGN,
 				      L1_CACHE_BYTES);
 	efx->rx_bufs_per_page = efx->rx_buffer_order ? 1 :
 		((PAGE_SIZE - sizeof(struct efx_rx_page_state)) /
@@ -188,9 +188,9 @@ static int efx_init_rx_buffers(struct efx_rx_queue *rx_queue)
 		do {
 			index = rx_queue->added_count & rx_queue->ptr_mask;
 			rx_buf = efx_rx_buffer(rx_queue, index);
-			rx_buf->dma_addr = dma_addr + EFX_PAGE_IP_ALIGN;
+			rx_buf->dma_addr = dma_addr + NET_IP_ALIGN;
 			rx_buf->page = page;
-			rx_buf->page_offset = page_offset + EFX_PAGE_IP_ALIGN;
+			rx_buf->page_offset = page_offset + NET_IP_ALIGN;
 			rx_buf->len = efx->rx_dma_len;
 			rx_buf->flags = 0;
 			++rx_queue->added_count;