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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-01-24 21:58:15 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-02-21 00:59:59 +0100 |
| commit | c0e1472d80784206ead1dd803dd4bc10e282b17f (patch) | |
| tree | 6d42811e526980da127270167e766a163836dc79 /kernel/locking/locktorture.c | |
| parent | locktorture: Allow CPU-hotplug to be disabled via --bootargs (diff) | |
| download | linux-c0e1472d80784206ead1dd803dd4bc10e282b17f.tar.xz linux-c0e1472d80784206ead1dd803dd4bc10e282b17f.zip | |
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/locktorture.c')
| -rw-r--r-- | kernel/locking/locktorture.c | 4 |
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); |