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authorAlexander Duyck <alexander.h.duyck@intel.com>2012-05-04 14:26:56 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-06 13:13:19 -0400
commitec47ea82477404631d49b8e568c71826c9b663ac (patch)
tree8b7890f23ad078d9eccbd4571e0b2da86b04a6a0 /drivers/atm
parent3e24591a19bbda6fcb2cbe383b41b4ba794501bf (diff)
downloadlinux-ec47ea82477404631d49b8e568c71826c9b663ac.tar.gz
skb: Add inline helper for getting the skb end offset from head
With the recent changes for how we compute the skb truesize it occurs to me we are probably going to have a lot of calls to skb_end_pointer - skb->head. Instead of running all over the place doing that it would make more sense to just make it a separate inline skb_end_offset(skb) that way we can return the correct value without having gcc having to do all the optimization to cancel out skb->head - skb->head. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/atm')
-rw-r--r--drivers/atm/ambassador.c2
-rw-r--r--drivers/atm/idt77252.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/atm/ambassador.c b/drivers/atm/ambassador.c
index f8f41e0e8a8..89b30f32ba6 100644
--- a/drivers/atm/ambassador.c
+++ b/drivers/atm/ambassador.c
@@ -802,7 +802,7 @@ static void fill_rx_pool (amb_dev * dev, unsigned char pool,
}
// cast needed as there is no %? for pointer differences
PRINTD (DBG_SKB, "allocated skb at %p, head %p, area %li",
- skb, skb->head, (long) (skb_end_pointer(skb) - skb->head));
+ skb, skb->head, (long) skb_end_offset(skb));
rx.handle = virt_to_bus (skb);
rx.host_address = cpu_to_be32 (virt_to_bus (skb->data));
if (rx_give (dev, &rx, pool))
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c
index 1c052127548..8974bd2b961 100644
--- a/drivers/atm/idt77252.c
+++ b/drivers/atm/idt77252.c
@@ -1258,7 +1258,7 @@ idt77252_rx_raw(struct idt77252_dev *card)
tail = readl(SAR_REG_RAWCT);
pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
- skb_end_pointer(queue) - queue->head - 16,
+ skb_end_offset(queue) - 16,
PCI_DMA_FROMDEVICE);
while (head != tail) {