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[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>
This commit is contained in:
Joe Perches 2007-02-22 01:26:32 -08:00 committed by David S. Miller
parent 269def7c50
commit 4c3ae4d7e7
2 changed files with 4 additions and 29 deletions
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18
net/ipv4/multipath_random.c
View File

@ -32,6 +32,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/mroute.h> #include <linux/mroute.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/random.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/protocol.h> #include <net/protocol.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
@ -48,21 +49,6 @@
#define MULTIPATH_MAX_CANDIDATES 40 #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, static void random_select_route(const struct flowi *flp,
struct rtable *first, struct rtable *first,
struct rtable **rp) struct rtable **rp)
@ -84,7 +70,7 @@ static void random_select_route(const struct flowi *flp,
if (candidate_count > 1) { if (candidate_count > 1) {
unsigned char i = 0; unsigned char i = 0;
unsigned char candidate_no = (unsigned char) unsigned char candidate_no = (unsigned char)
random(candidate_count); (random32() % candidate_count);
/* find chosen candidate and adjust GC data for all candidates /* find chosen candidate and adjust GC data for all candidates
* to ensure they stay in cache * to ensure they stay in cache

15
net/ipv4/multipath_wrandom.c
View File

@ -32,6 +32,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/mroute.h> #include <linux/mroute.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/random.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/protocol.h> #include <net/protocol.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
@ -84,18 +85,6 @@ struct multipath_route {
/* state: primarily weight per route information */ /* state: primarily weight per route information */
static struct multipath_bucket state[MULTIPATH_STATE_SIZE]; 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, static unsigned char __multipath_lookup_weight(const struct flowi *fl,
const struct rtable *rt) const struct rtable *rt)
{ {
@ -193,7 +182,7 @@ static void wrandom_select_route(const struct flowi *flp,
/* choose a weighted random candidate */ /* choose a weighted random candidate */
decision = first; decision = first;
selector = random(power); selector = random32() % power;
last_power = 0; last_power = 0;
/* select candidate, adjust GC data and cleanup local state */ /* select candidate, adjust GC data and cleanup local state */