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>

2 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 262e13c02ec2..826019008958 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -198,7 +198,7 @@ begin:
                         }
                 } else if (score == hiscore && reuseport) {
                         matches++;
-                        if (((u64)phash * matches) >> 32 == 0)
+                        if (reciprocal_scale(phash, matches) == 0)
                                 result = sk;
                         phash = next_pseudo_random32(phash);
                 }
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 4836af8f582d..25ffe737b975 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -243,7 +243,7 @@ begin:
                                 goto exact_match;
                 } else if (score == badness && reuseport) {
                         matches++;
-                        if (((u64)hash * matches) >> 32 == 0)
+                        if (reciprocal_scale(hash, matches) == 0)
                                 result = sk;
                         hash = next_pseudo_random32(hash);
                 }
@@ -323,7 +323,7 @@ begin:
                         }
                 } else if (score == badness && reuseport) {
                         matches++;
-                        if (((u64)hash * matches) >> 32 == 0)
+                        if (reciprocal_scale(hash, matches) == 0)
                                 result = sk;
                         hash = next_pseudo_random32(hash);
                 }