[SUNRPC]: annotate hash_ip()

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sunrpc/svcauth_unix.c

@@ -101,9 +101,9 @@ static void ip_map_put(struct kref *kref)
  * IP addresses in reverse-endian (i.e. on a little-endian machine).
  * So use a trivial but reliable hash instead
  */
-static inline int hash_ip(unsigned long ip)
+static inline int hash_ip(__be32 ip)
 {
-	int hash = ip ^ (ip>>16);
+	int hash = (__force u32)ip ^ ((__force u32)ip>>16);
 	return (hash ^ (hash>>8)) & 0xff;
 }
 #endif
@@ -284,7 +284,7 @@ static struct ip_map *ip_map_lookup(char *class, struct in_addr addr)
 	ip.m_addr = addr;
 	ch = sunrpc_cache_lookup(&ip_map_cache, &ip.h,
 				 hash_str(class, IP_HASHBITS) ^
-				 hash_ip((unsigned long)addr.s_addr));
+				 hash_ip(addr.s_addr));
 
 	if (ch)
 		return container_of(ch, struct ip_map, h);
@@ -313,7 +313,7 @@ static int ip_map_update(struct ip_map *ipm, struct unix_domain *udom, time_t ex
 	ch = sunrpc_cache_update(&ip_map_cache,
 				 &ip.h, &ipm->h,
 				 hash_str(ipm->m_class, IP_HASHBITS) ^
-				 hash_ip((unsigned long)ipm->m_addr.s_addr));
+				 hash_ip(ipm->m_addr.s_addr));
 	if (!ch)
 		return -ENOMEM;
 	cache_put(ch, &ip_map_cache);