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wil6210: prefetch head of packet 

As soon as skb is ready to be reaped, prefetch 1-st cache line.
This accelerates data access that is performed later, during the
packet classification by the driver and IP stack.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vladimir Kondratiev 2014-01-08 11:50:49 +02:00 committed by John W. Linville
parent df2d08eed2
commit 1cbbcb08c7
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/ath/wil6210/txrx.c
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@ -21,6 +21,7 @@
#include <linux/ip.h> #include <linux/ip.h>
#include <linux/ipv6.h> #include <linux/ipv6.h>
#include <net/ipv6.h> #include <net/ipv6.h>
#include <asm/processor.h>
#include "wil6210.h" #include "wil6210.h"
#include "wmi.h" #include "wmi.h"
@ -377,6 +378,8 @@ static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil,
} }
skb_trim(skb, dmalen); skb_trim(skb, dmalen);
prefetch(skb->data);
wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb_headlen(skb), false); skb->data, skb_headlen(skb), false);