[IPV6]: Use "const" qualifier.

include/net/addrconf.h

@@ -175,7 +175,7 @@ extern void			addrconf_forwarding_on(void);
  *	Hash function taken from net_alias.c
  */
 
-static __inline__ u8 ipv6_addr_hash(struct in6_addr *addr)
+static __inline__ u8 ipv6_addr_hash(const struct in6_addr *addr)
 {	
 	__u32 word;
 
@@ -195,7 +195,7 @@ static __inline__ u8 ipv6_addr_hash(struct in6_addr *addr)
  *	compute link-local solicited-node multicast address
  */
 
-static inline void addrconf_addr_solict_mult(struct in6_addr *addr,
+static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
 					     struct in6_addr *solicited)
 {
 	ipv6_addr_set(solicited,
@@ -219,7 +219,7 @@ static inline void ipv6_addr_all_routers(struct in6_addr *addr)
 		      __constant_htonl(0x2));
 }
 
-static inline int ipv6_addr_is_multicast(struct in6_addr *addr)
+static inline int ipv6_addr_is_multicast(const struct in6_addr *addr)
 {
 	return (addr->s6_addr32[0] & __constant_htonl(0xFF000000)) == __constant_htonl(0xFF000000);
 }

include/net/ipv6.h

@@ -222,21 +222,21 @@ typedef int		(*inet_getfrag_t) (const void *data,
 					   unsigned int, unsigned int);
 
 
-extern int		ipv6_addr_type(struct in6_addr *addr);
+extern int		ipv6_addr_type(const struct in6_addr *addr);
 
-static inline int ipv6_addr_scope(struct in6_addr *addr)
+static inline int ipv6_addr_scope(const struct in6_addr *addr)
 {
 	return ipv6_addr_type(addr) & IPV6_ADDR_SCOPE_MASK;
 }
 
-static inline int ipv6_addr_cmp(struct in6_addr *a1, struct in6_addr *a2)
+static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr *a2)
 {
-	return memcmp((void *) a1, (void *) a2, sizeof(struct in6_addr));
+	return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
 }
 
-static inline void ipv6_addr_copy(struct in6_addr *a1, struct in6_addr *a2)
+static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
 {
-	memcpy((void *) a1, (void *) a2, sizeof(struct in6_addr));
+	memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
 }
 
 #ifndef __HAVE_ARCH_ADDR_SET
@@ -251,7 +251,7 @@ static inline void ipv6_addr_set(struct in6_addr *addr,
 }
 #endif
 
-static inline int ipv6_addr_any(struct in6_addr *a)
+static inline int ipv6_addr_any(const struct in6_addr *a)
 {
 	return ((a->s6_addr32[0] | a->s6_addr32[1] | 
 		 a->s6_addr32[2] | a->s6_addr32[3] ) == 0); 

net/ipv6/addrconf.c

@@ -172,7 +172,7 @@ static struct ipv6_devconf ipv6_devconf_dflt =
 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
 
-int ipv6_addr_type(struct in6_addr *addr)
+int ipv6_addr_type(const struct in6_addr *addr)
 {
 	int type;
 	u32 st;
@@ -486,7 +486,7 @@ void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
 /* On success it returns ifp with increased reference count */
 
 static struct inet6_ifaddr *
-ipv6_add_addr(struct inet6_dev *idev, struct in6_addr *addr, int pfxlen,
+ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
 	      int scope, unsigned flags)
 {
 	struct inet6_ifaddr *ifa;