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authorChangli Gao <xiaosuo@gmail.com>2010-12-07 04:26:16 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-08 10:43:41 -0800
commitf6dafa95d1a48f73ab4a5b0f7dc0dcb72817e051 (patch)
treef922f2991f04ffd29d76e4fbaf07ec299efbdd1c
parent15c2d75f49189e1769c5e8f5f099d03d055c4910 (diff)
af_packet: eliminate pgv_to_page on some arches
Some arches don't need flush_dcache_page(), and don't implement it, so we can eliminate pgv_to_page() calls on those arches. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/packet/af_packet.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 17eafe5b48c..9292ec93eb5 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -223,7 +223,7 @@ struct packet_skb_cb {
#define PACKET_SKB_CB(__skb) ((struct packet_skb_cb *)((__skb)->cb))
-static inline struct page *pgv_to_page(void *addr)
+static inline __pure struct page *pgv_to_page(void *addr)
{
if (is_vmalloc_addr(addr))
return vmalloc_to_page(addr);
@@ -806,6 +806,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
__packet_set_status(po, h.raw, status);
smp_mb();
+#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE == 1
{
u8 *start, *end;
@@ -813,6 +814,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
for (start = h.raw; start < end; start += PAGE_SIZE)
flush_dcache_page(pgv_to_page(start));
}
+#endif
sk->sk_data_ready(sk, 0);