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| author | Changli Gao <xiaosuo@gmail.com> | 2010-12-07 04:26:16 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-12-08 10:43:41 -0800 |
| commit | f6dafa95d1a48f73ab4a5b0f7dc0dcb72817e051 (patch) | |
| tree | f922f2991f04ffd29d76e4fbaf07ec299efbdd1c /net/packet | |
| parent | 15c2d75f49189e1769c5e8f5f099d03d055c4910 (diff) | |
| download | lwn-f6dafa95d1a48f73ab4a5b0f7dc0dcb72817e051.tar.gz lwn-f6dafa95d1a48f73ab4a5b0f7dc0dcb72817e051.zip | |
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>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/af_packet.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 17eafe5b48c6..9292ec93eb52 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); |