Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / kernel / locking / locktorture.c

diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index f26b1a18e34e03cb0582fbf2de16d008f9731d89..0955b885d0dc8eb5fe54aeeebe08c0eee6bd9cb7 100644 (file)
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -82,14 +82,14 @@ struct lock_writer_stress_stats {
 };
 static struct lock_writer_stress_stats *lwsa;
 
-#if defined(MODULE) || defined(CONFIG_LOCK_TORTURE_TEST_RUNNABLE)
+#if defined(MODULE)
 #define LOCKTORTURE_RUNNABLE_INIT 1
 #else
 #define LOCKTORTURE_RUNNABLE_INIT 0
 #endif
 int locktorture_runnable = LOCKTORTURE_RUNNABLE_INIT;
 module_param(locktorture_runnable, int, 0444);
-MODULE_PARM_DESC(locktorture_runnable, "Start locktorture at boot");
+MODULE_PARM_DESC(locktorture_runnable, "Start locktorture at module init");
 
 /* Forward reference. */
 static void lock_torture_cleanup(void);
@@ -216,10 +216,11 @@ static int lock_torture_writer(void *arg)
        static DEFINE_TORTURE_RANDOM(rand);
 
        VERBOSE_TOROUT_STRING("lock_torture_writer task started");
-       set_user_nice(current, 19);
+       set_user_nice(current, MAX_NICE);
 
        do {
-               schedule_timeout_uninterruptible(1);
+               if ((torture_random(&rand) & 0xfffff) == 0)
+                       schedule_timeout_uninterruptible(1);
                cur_ops->writelock();
                if (WARN_ON_ONCE(lock_is_write_held))
                        lwsp->n_write_lock_fail++;
@@ -354,7 +355,8 @@ static int __init lock_torture_init(void)
                &lock_busted_ops, &spin_lock_ops, &spin_lock_irq_ops,
        };
 
-       torture_init_begin(torture_type, verbose, &locktorture_runnable);
+       if (!torture_init_begin(torture_type, verbose, &locktorture_runnable))
+               return -EBUSY;
 
        /* Process args and tell the world that the torturer is on the job. */
        for (i = 0; i < ARRAY_SIZE(torture_ops); i++) {