[IPV4]: Size fib_info_devhash[] correctly.

There is a thinko in the allocation for the devindex hash.  We're
only giving it 8 elements when it should be 1<<8 elements.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_semantics.c

@@ -52,7 +52,8 @@ static unsigned int fib_hash_size;
 static unsigned int fib_info_cnt;
 
 #define DEVINDEX_HASHBITS 8
-static struct hlist_head fib_info_devhash[DEVINDEX_HASHBITS];
+#define DEVINDEX_HASHSIZE (1U << DEVINDEX_HASHBITS)
+static struct hlist_head fib_info_devhash[DEVINDEX_HASHSIZE];
 
 #ifdef CONFIG_IP_ROUTE_MULTIPATH
 
@@ -229,7 +230,7 @@ static struct fib_info *fib_find_info(const struct fib_info *nfi)
 
 static inline unsigned int fib_devindex_hashfn(unsigned int val)
 {
-	unsigned int mask = ((1U << DEVINDEX_HASHBITS) - 1);
+	unsigned int mask = DEVINDEX_HASHSIZE - 1;
 
 	return (val ^
 		(val >> DEVINDEX_HASHBITS) ^