linux-kernel - tpacket

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Message-ID: <4600E5E0.3020507@centecnetworks.com>
Date:	Wed, 21 Mar 2007 15:59:28 +0800
From:	Miao Qingjun <qmiao@...tecnetworks.com>
To:	linux-kernel@...r.kernel.org
Subject: tpacket_rcv

Hi,

Can anybody explain what the following code does and why needs it??

Thanks

tpacket_rcv()
{
....
h->tp_status = status;
smp_mb();

{
struct page *p_start, *p_end;
u8 *h_end = (u8 *)h + macoff + snaplen - 1;

p_start = virt_to_page(h);
p_end = virt_to_page(h_end);
while (p_start <= p_end) {
flush_dcache_page(p_start);
p_start++;
}
}

sk->sk_data_ready(sk, 0);
...
}

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