[PATCH rcu 8/9] torture: Stop right-shifting torture_random() return values

From: Paul E. McKenney
Date: Mon Jul 17 2023 - 14:21:16 EST


Now that torture_random() uses swahw32(), its callers no longer see
not-so-random low-order bits, as these are now swapped up into the upper
16 bits of the torture_random() function's return value. This commit
therefore removes the right-shifting of torture_random() return values.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
kernel/torture.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/torture.c b/kernel/torture.c
index 92704f04a141..b59eb6048eab 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -95,7 +95,7 @@ int torture_hrtimeout_ns(ktime_t baset_ns, u32 fuzzt_ns, struct torture_random_s
ktime_t hto = baset_ns;

if (trsp)
- hto += (torture_random(trsp) >> 3) % fuzzt_ns;
+ hto += torture_random(trsp) % fuzzt_ns;
set_current_state(TASK_IDLE);
return schedule_hrtimeout(&hto, HRTIMER_MODE_REL);
}
@@ -365,7 +365,7 @@ torture_onoff(void *arg)
torture_hrtimeout_jiffies(HZ / 10, &rand);
continue;
}
- cpu = (torture_random(&rand) >> 4) % (maxcpu + 1);
+ cpu = torture_random(&rand) % (maxcpu + 1);
if (!torture_offline(cpu,
&n_offline_attempts, &n_offline_successes,
&sum_offline, &min_offline, &max_offline))
--
2.40.1