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Commit f6dafa95 authored by Changli Gao's avatar Changli Gao Committed by David S. Miller
Browse files

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: default avatarChangli Gao <xiaosuo@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 15c2d75f

net/packet/af_packet.c

+3 −1
Original line number Diff line number Diff line
@@ -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);