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authorPaul E. McKenney <paulmck@kernel.org>2020-01-24 12:58:15 -0800
committerPaul E. McKenney <paulmck@kernel.org>2020-02-20 15:59:59 -0800
commitc0e1472d80784206ead1dd803dd4bc10e282b17f (patch)
tree6d42811e526980da127270167e766a163836dc79 /kernel/locking
parent7aabb6f839622bc96a425d93f3f7373167be1e19 (diff)
locktorture: Use private random-number generators
Both lock_torture_writer() and lock_torture_reader() use the "static" keyword on their DEFINE_TORTURE_RANDOM(rand) declarations, which means that a single instance of a random-number generator are shared among all the writers and another is shared among all the readers. Unfortunately, this random-number generator was not designed for concurrent access. This commit therefore removes both "static" keywords so that each reader and each writer gets its own random-number generator. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/locking')
-rw-r--r--kernel/locking/locktorture.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index 687c1d83dc20..5baf904e8f39 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -618,7 +618,7 @@ static struct lock_torture_ops percpu_rwsem_lock_ops = {
static int lock_torture_writer(void *arg)
{
struct lock_stress_stats *lwsp = arg;
- static DEFINE_TORTURE_RANDOM(rand);
+ DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_writer task started");
set_user_nice(current, MAX_NICE);
@@ -655,7 +655,7 @@ static int lock_torture_writer(void *arg)
static int lock_torture_reader(void *arg)
{
struct lock_stress_stats *lrsp = arg;
- static DEFINE_TORTURE_RANDOM(rand);
+ DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_reader task started");
set_user_nice(current, MAX_NICE);