net: use reciprocal_scale() helper
Replace open codings of (((u64) <x> * <y>) >> 32) with reciprocal_scale().
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 0b634e7..5016a69 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -142,7 +142,7 @@
static u32 __hash_bucket(u32 hash, unsigned int size)
{
- return ((u64)hash * size) >> 32;
+ return reciprocal_scale(hash, size);
}
static u32 hash_bucket(u32 hash, const struct net *net)