sfc: Reduce the size of struct efx_tx_buffer
Remove unmap_addr since it can be calculated from dma_addr, len and
unmap_len. This saves 4-16 bytes.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c
index 1112775..5f01371 100644
--- a/drivers/net/sfc/tx.c
+++ b/drivers/net/sfc/tx.c
@@ -64,12 +64,14 @@
{
if (buffer->unmap_len) {
struct pci_dev *pci_dev = tx_queue->efx->pci_dev;
+ dma_addr_t unmap_addr = (buffer->dma_addr + buffer->len -
+ buffer->unmap_len);
if (buffer->unmap_single)
- pci_unmap_single(pci_dev, buffer->unmap_addr,
- buffer->unmap_len, PCI_DMA_TODEVICE);
+ pci_unmap_single(pci_dev, unmap_addr, buffer->unmap_len,
+ PCI_DMA_TODEVICE);
else
- pci_unmap_page(pci_dev, buffer->unmap_addr,
- buffer->unmap_len, PCI_DMA_TODEVICE);
+ pci_unmap_page(pci_dev, unmap_addr, buffer->unmap_len,
+ PCI_DMA_TODEVICE);
buffer->unmap_len = 0;
buffer->unmap_single = 0;
}
@@ -233,7 +235,6 @@
} while (len);
/* Transfer ownership of the unmapping to the final buffer */
- buffer->unmap_addr = unmap_addr;
buffer->unmap_single = unmap_single;
buffer->unmap_len = unmap_len;
unmap_len = 0;
@@ -805,6 +806,7 @@
static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue)
{
struct efx_tx_buffer *buffer;
+ dma_addr_t unmap_addr;
/* Work backwards until we hit the original insert pointer value */
while (tx_queue->insert_count != tx_queue->write_count) {
@@ -816,15 +818,15 @@
buffer->len = 0;
buffer->continuation = 1;
if (buffer->unmap_len) {
+ unmap_addr = (buffer->dma_addr + buffer->len -
+ buffer->unmap_len);
if (buffer->unmap_single)
pci_unmap_single(tx_queue->efx->pci_dev,
- buffer->unmap_addr,
- buffer->unmap_len,
+ unmap_addr, buffer->unmap_len,
PCI_DMA_TODEVICE);
else
pci_unmap_page(tx_queue->efx->pci_dev,
- buffer->unmap_addr,
- buffer->unmap_len,
+ unmap_addr, buffer->unmap_len,
PCI_DMA_TODEVICE);
buffer->unmap_len = 0;
}