When do locktorture for exclusive lock which doesn't have readlock support, the following module parameters will be considered as valid: torture_type=mutex_lock nwriters_stress=0 nreaders_stress=1 But locktorture will do nothing useful, so instead of permitting these useless parameters, let's reject these parameters by returning -EINVAL during module init. Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx> --- kernel/locking/locktorture.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c index 9cfa5e89cff7f..bebdf98e6cd78 100644 --- a/kernel/locking/locktorture.c +++ b/kernel/locking/locktorture.c @@ -868,7 +868,8 @@ static int __init lock_torture_init(void) goto unwind; } - if (nwriters_stress == 0 && nreaders_stress == 0) { + if (nwriters_stress == 0 && + (!cxt.cur_ops->readlock || nreaders_stress == 0)) { pr_alert("lock-torture: must run at least one locking thread\n"); firsterr = -EINVAL; goto unwind; -- 2.25.0.4.g0ad7144999