From f6dafa95d1a48f73ab4a5b0f7dc0dcb72817e051 Mon Sep 17 00:00:00 2001 From: Changli Gao Date: Tue, 7 Dec 2010 04:26:16 +0000 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- net/packet/af_packet.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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); -- 2.30.2