[PATCH v2 2/2] net: if_arp: use define instead of hard-coded value

[Håkon Bugge]

Let uapi/linux/if_arp.h include uapi/linux/if.h, where IFNAMSIZ is
defined. Then, use it in this file instead of hard-coded value.

This way, we are using an uapi defined constant, and as such,
user-space should be good.

Signed-off-by: Håkon Bugge <haakon.bu...@oracle.com>
Tested-by: Stephen Hemminger <step...@networkplumber.org>

---

v1 -> v2:
   * Include uapi/linux/if.h
   * Add Stephen's t-b
---
 include/uapi/linux/if_arp.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/if_arp.h b/include/uapi/linux/if_arp.h
index b68b4b3d9172..f5d2dab3f610 100644
--- a/include/uapi/linux/if_arp.h
+++ b/include/uapi/linux/if_arp.h
@@ -24,6 +24,7 @@
 #ifndef _UAPI_LINUX_IF_ARP_H
 #define _UAPI_LINUX_IF_ARP_H
 
+#include <linux/if.h>
 #include <linux/netdevice.h>
 
 /* ARP protocol HARDWARE identifiers. */
@@ -118,7 +119,7 @@ struct arpreq {
        struct sockaddr arp_ha;         /* hardware address              */
        int             arp_flags;      /* flags                         */
        struct sockaddr arp_netmask;    /* netmask (only for proxy arps) */
-       char            arp_dev[16];
+       char            arp_dev[IFNAMSIZ];
 };
 
 struct arpreq_old {
-- 
2.14.3