linux-kernel - Re: [PATCH] net/ipv4/arp.c: Use the exported hex

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Message-ID: <91b13c310805201927k4fccf8dcwa3fabe61777b2eda@mail.gmail.com>
Date:	Wed, 21 May 2008 10:27:41 +0800
From:	"rae l" <crquan@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	harvey.harrison@...il.com, herbert@...dor.apana.org.au,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/ipv4/arp.c: Use the exported hex_asc from lib/hexdump.c instead

>From bc47e710a3ebd8a5989404f711a051b6516d01ed Mon Sep 17 00:00:00 2001
From: Denis Cheng <crquan@...il.com>
Date: Wed, 21 May 2008 09:43:32 +0800
Subject: [PATCH] net/ipv4/arp.c: Use common hex_asc helpers

Here the local hexbuf is a duplicate of global const char hex_asc from
lib/hexdump.c, except the hex letters' cases:

	const char hexbuf[] = "0123456789ABCDEF";

	const char hex_asc[] = "0123456789abcdef";

and here to print HW addresses, the hex cases are not significant.

Thanks to Harvey Harrison to introduce the hex_asc_hi/hex_asc_lo helpers.

Signed-off-by: Denis Cheng <crquan@...il.com>
Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
Acked-by: David S. Miller <davem@...emloft.net>
---
 net/ipv4/arp.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 418862f..9b539fa 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1288,7 +1288,6 @@ static void arp_format_neigh_entry(struct seq_file *seq,
 				   struct neighbour *n)
 {
 	char hbuffer[HBUFFERLEN];
-	const char hexbuf[] = "0123456789ABCDEF";
 	int k, j;
 	char tbuf[16];
 	struct net_device *dev = n->dev;
@@ -1302,8 +1301,8 @@ static void arp_format_neigh_entry(struct seq_file *seq,
 	else {
 #endif
 	for (k = 0, j = 0; k < HBUFFERLEN - 3 && j < dev->addr_len; j++) {
-		hbuffer[k++] = hexbuf[(n->ha[j] >> 4) & 15];
-		hbuffer[k++] = hexbuf[n->ha[j] & 15];
+		hbuffer[k++] = hex_asc_hi(n->ha[j]);
+		hbuffer[k++] = hex_asc_lo(n->ha[j]);
 		hbuffer[k++] = ':';
 	}
 	hbuffer[--k] = 0;
-- 
1.5.4.3
--
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