From 37c08785f6f21261981a4f7415178c8b001d6eba Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@cse.unsw.edu.au>
Date: Fri, 6 Jan 2006 00:09:49 -0800
Subject: [PATCH] --- yaml --- r: 16291 b: refs/heads/master c:
 1f1e030bf75774b6a283518e1534d598e14147d4 h: refs/heads/master i:   16289:
 441c921189d176a21935b380b951bcebb3d6eff2   16287:
 97a6b7ed60624cb864daa4155b15147e167b629d v: v3

---
 [refs]                          |  2 +-
 trunk/net/sunrpc/svcauth_unix.c | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index de5e6f4e3754..043dbabd97e7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4b2f0260c74324abca76ccaa42d426af163125e7
+refs/heads/master: 1f1e030bf75774b6a283518e1534d598e14147d4
diff --git a/trunk/net/sunrpc/svcauth_unix.c b/trunk/net/sunrpc/svcauth_unix.c
index cac2e774dd81..3e6c694bbad1 100644
--- a/trunk/net/sunrpc/svcauth_unix.c
+++ b/trunk/net/sunrpc/svcauth_unix.c
@@ -101,10 +101,22 @@ static void ip_map_put(struct cache_head *item, struct cache_detail *cd)
 	}
 }
 
+#if IP_HASHBITS == 8
+/* hash_long on a 64 bit machine is currently REALLY BAD for
+ * 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)
+{
+	int hash = ip ^ (ip>>16);
+	return (hash ^ (hash>>8)) & 0xff;
+}
+#endif
+
 static inline int ip_map_hash(struct ip_map *item)
 {
 	return hash_str(item->m_class, IP_HASHBITS) ^ 
-		hash_long((unsigned long)item->m_addr.s_addr, IP_HASHBITS);
+		hash_ip((unsigned long)item->m_addr.s_addr);
 }
 static inline int ip_map_match(struct ip_map *item, struct ip_map *tmp)
 {