net: sched: cls_u32: use hash_ptr() for tc_u_hash

After the change to the tp hash, we now get a build warning
on 32-bit architectures:

net/sched/cls_u32.c: In function 'tc_u_hash':
net/sched/cls_u32.c:338:17: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
  return hash_64((u64) tp->chain->block, U32_HASH_SHIFT);

Using hash_ptr() instead of hash_64() lets us drop the cast
and fixes the warning while still resulting in the same hash
value.

Fixes: 7fa9d97 ("net: sched: cls_u32: use block instead of q in tc_u_common")
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Jiri Pirko <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: arndb

net/sched/cls_u32.c

@@ -335,7 +335,7 @@ static struct hlist_head *tc_u_common_hash;
 
 static unsigned int tc_u_hash(const struct tcf_proto *tp)
 {
-	return hash_64((u64) tp->chain->block, U32_HASH_SHIFT);
+	return hash_ptr(tp->chain->block, U32_HASH_SHIFT);
 }
 
 static struct tc_u_common *tc_u_common_find(const struct tcf_proto *tp)