netdev - [PATCHv4 net-next 06/12] ndisc: add __ndisc_fill_addr

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Message-Id: <20160615192027.4064-7-aar@pengutronix.de>
Date:	Wed, 15 Jun 2016 21:20:21 +0200
From:	Alexander Aring <aar@...gutronix.de>
To:	linux-wpan@...r.kernel.org
Cc:	kernel@...gutronix.de, marcel@...tmann.org,
	jukka.rissanen@...ux.intel.com, hannes@...essinduktion.org,
	stefan@....samsung.com, mcr@...delman.ca, werner@...esberger.net,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	Alexander Aring <aar@...gutronix.de>,
	"David S . Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: [PATCHv4 net-next 06/12] ndisc: add __ndisc_fill_addr_option function

This patch adds __ndisc_fill_addr_option as low-level function for
ndisc_fill_addr_option which doesn't depend on net_device parameter.

Cc: David S. Miller <davem@...emloft.net>
Cc: Alexey Kuznetsov <kuznet@....inr.ac.ru>
Cc: James Morris <jmorris@...ei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Cc: Patrick McHardy <kaber@...sh.net>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Reviewed-by: Stefan Schmidt <stefan@....samsung.com>
Signed-off-by: Alexander Aring <aar@...gutronix.de>
---
 net/ipv6/ndisc.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index c245895..a7b9468 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -150,11 +150,10 @@ struct neigh_table nd_tbl = {
 };
 EXPORT_SYMBOL_GPL(nd_tbl);
 
-static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data)
+static void __ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data,
+				     int data_len, int pad)
 {
-	int pad   = ndisc_addr_option_pad(skb->dev->type);
-	int data_len = skb->dev->addr_len;
-	int space = ndisc_opt_addr_space(skb->dev);
+	int space = __ndisc_opt_addr_space(data_len, pad);
 	u8 *opt = skb_put(skb, space);
 
 	opt[0] = type;
@@ -172,6 +171,13 @@ static void ndisc_fill_addr_option(struct sk_buff *skb, int type, void *data)
 		memset(opt, 0, space);
 }
 
+static inline void ndisc_fill_addr_option(struct sk_buff *skb, int type,
+					  void *data)
+{
+	__ndisc_fill_addr_option(skb, type, data, skb->dev->addr_len,
+				 ndisc_addr_option_pad(skb->dev->type));
+}
+
 static struct nd_opt_hdr *ndisc_next_option(struct nd_opt_hdr *cur,
 					    struct nd_opt_hdr *end)
 {
-- 
2.8.3