[NETEM]: use better types for time values

The random number generator always generates 32 bit values.
The time values are limited by psched_tdiff_t

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 12 insertions, 9 deletions

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 791c615e3aad..4ac6df0a5b35 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -57,19 +57,20 @@ struct netem_sched_data {
         struct Qdisc    *qdisc;
         struct qdisc_watchdog watchdog;
 
-        u32 latency;
+        psched_tdiff_t latency;
+        psched_tdiff_t jitter;
+
         u32 loss;
         u32 limit;
         u32 counter;
         u32 gap;
-        u32 jitter;
         u32 duplicate;
         u32 reorder;
         u32 corrupt;
 
         struct crndstate {
-                unsigned long last;
-                unsigned long rho;
+                u32 last;
+                u32 rho;
         } delay_cor, loss_cor, dup_cor, reorder_cor, corrupt_cor;
 
         struct disttable {
@@ -96,7 +97,7 @@ static void init_crandom(struct crndstate *state, unsigned long rho)
  * Next number depends on last value.
  * rho is scaled to avoid floating point.
  */
-static unsigned long get_crandom(struct crndstate *state)
+static u32 get_crandom(struct crndstate *state)
 {
         u64 value, rho;
         unsigned long answer;
@@ -115,11 +116,13 @@ static unsigned long get_crandom(struct crndstate *state)
  * std deviation sigma.  Uses table lookup to approximate the desired
  * distribution, and a uniformly-distributed pseudo-random source.
  */
-static long tabledist(unsigned long mu, long sigma,
-                      struct crndstate *state, const struct disttable *dist)
+static psched_tdiff_t tabledist(psched_tdiff_t mu, psched_tdiff_t sigma,
+                                struct crndstate *state,
+                                const struct disttable *dist)
 {
-        long t, x;
-        unsigned long rnd;
+        psched_tdiff_t x;
+        long t;
+        u32 rnd;
 
         if (sigma == 0)
                 return mu;