提交 4c3ae4d7 编写于 作者: J Joe Perches 提交者: David S. Miller

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

Removed local random number generator function
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 269def7c
......@@ -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
......
......@@ -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 */
......
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