[IPV4]: Use random32() in net/ipv4/multipath

Removed local random number generator function

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 4 insertions, 29 deletions

diff --git a/net/ipv4/multipath_random.c b/net/ipv4/multipath_random.c
index 57f481498fbb..c312785d14d0 100644
--- a/net/ipv4/multipath_random.c
+++ b/net/ipv4/multipath_random.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <linux/mroute.h>
 #include <linux/init.h>
+#include <linux/random.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <linux/skbuff.h>
@@ -48,21 +49,6 @@
 
 #define MULTIPATH_MAX_CANDIDATES 40
 
-/* interface to random number generation */
-static unsigned int RANDOM_SEED = 93186752;
-
-static inline unsigned int random(unsigned int ubound)
-{
-        static unsigned int a = 1588635695,
-                q = 2,
-                r = 1117695901;
-
-        RANDOM_SEED = a*(RANDOM_SEED % q) - r*(RANDOM_SEED / q);
-
-        return RANDOM_SEED % ubound;
-}
-
-
 static void random_select_route(const struct flowi *flp,
                                 struct rtable *first,
                                 struct rtable **rp)
@@ -84,7 +70,7 @@ static void random_select_route(const struct flowi *flp,
         if (candidate_count > 1) {
                 unsigned char i = 0;
                 unsigned char candidate_no = (unsigned char)
-                        random(candidate_count);
+                        (random32() % candidate_count);
 
                 /* find chosen candidate and adjust GC data for all candidates
                  * to ensure they stay in cache
diff --git a/net/ipv4/multipath_wrandom.c b/net/ipv4/multipath_wrandom.c
index 2bdbb92b450a..57c503694539 100644
--- a/net/ipv4/multipath_wrandom.c
+++ b/net/ipv4/multipath_wrandom.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <linux/mroute.h>
 #include <linux/init.h>
+#include <linux/random.h>
 #include <net/ip.h>
 #include <net/protocol.h>
 #include <linux/skbuff.h>
@@ -84,18 +85,6 @@ struct multipath_route {
 /* state: primarily weight per route information */
 static struct multipath_bucket state[MULTIPATH_STATE_SIZE];
 
-/* interface to random number generation */
-static unsigned int RANDOM_SEED = 93186752;
-
-static inline unsigned int random(unsigned int ubound)
-{
-        static unsigned int a = 1588635695,
-                q = 2,
-                r = 1117695901;
-        RANDOM_SEED = a*(RANDOM_SEED % q) - r*(RANDOM_SEED / q);
-        return RANDOM_SEED % ubound;
-}
-
 static unsigned char __multipath_lookup_weight(const struct flowi *fl,
                                                const struct rtable *rt)
 {
@@ -193,7 +182,7 @@ static void wrandom_select_route(const struct flowi *flp,
 
         /* choose a weighted random candidate */
         decision = first;
-        selector = random(power);
+        selector = random32() % power;
         last_power = 0;
 
         /* select candidate, adjust GC data and cleanup local state */