[PATCHv3 net-next 04/12] ndisc: add __ndisc_opt_addr_space function

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

Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx>
Cc: James Morris <jmorris@xxxxxxxxx>
Cc: Hideaki YOSHIFUJI <yoshfuji@xxxxxxxxxxxxxx>
Cc: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
---
 include/net/ndisc.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 2d8edaa..4cee826 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -127,10 +127,15 @@ static inline int ndisc_addr_option_pad(unsigned short type)
 	}
 }
 
+static inline int __ndisc_opt_addr_space(unsigned char addr_len, int pad)
+{
+	return NDISC_OPT_SPACE(addr_len + pad);
+}
+
 static inline int ndisc_opt_addr_space(struct net_device *dev)
 {
-	return NDISC_OPT_SPACE(dev->addr_len +
-			       ndisc_addr_option_pad(dev->type));
+	return __ndisc_opt_addr_space(dev->addr_len,
+				      ndisc_addr_option_pad(dev->type));
 }
 
 static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
-- 
2.8.3

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