diff options
Diffstat (limited to 'kernel/locking/test-ww_mutex.c')
| -rw-r--r-- | kernel/locking/test-ww_mutex.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c index 93cca6e69860..9bceba65858a 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/test-ww_mutex.c @@ -9,7 +9,7 @@ #include <linux/delay.h> #include <linux/kthread.h> #include <linux/module.h> -#include <linux/random.h> +#include <linux/prandom.h> #include <linux/slab.h> #include <linux/ww_mutex.h> @@ -386,6 +386,19 @@ struct stress { int nlocks; }; +struct rnd_state rng; +DEFINE_SPINLOCK(rng_lock); + +static inline u32 prandom_u32_below(u32 ceil) +{ + u32 ret; + + spin_lock(&rng_lock); + ret = prandom_u32_state(&rng) % ceil; + spin_unlock(&rng_lock); + return ret; +} + static int *get_random_order(int count) { int *order; @@ -399,7 +412,7 @@ static int *get_random_order(int count) order[n] = n; for (n = count - 1; n > 1; n--) { - r = get_random_u32_below(n + 1); + r = prandom_u32_below(n + 1); if (r != n) { tmp = order[n]; order[n] = order[r]; @@ -625,6 +638,8 @@ static int __init test_ww_mutex_init(void) printk(KERN_INFO "Beginning ww mutex selftests\n"); + prandom_seed_state(&rng, get_random_u64()); + wq = alloc_workqueue("test-ww_mutex", WQ_UNBOUND, 0); if (!wq) return -ENOMEM; |