[PATCH] hazptrtorture: Fix inverted sleep condition in do_pending kthread

The do_pending kthread never sleeps. Its supposed to.
kthread_do_pending_ms sets the gap between cleanups, and the docs
say so too. But the sleep sits behind torture_must_stop(), and thats
false while the test runs. So the kthread never sleeps. It just loops.
It drains the pending lists over and over, no pause, and burns a full
CPU for the whole test.

Flip the check. With !torture_must_stop() it sleeps for
kthread_do_pending_ms between passes. When the test stops it does one
last cleanup and exits. Nothing left to do, so no sleep needed then.

Fixes: 94d2e93c222e ("hazptrtorture: Add kthread to release deferred hazard pointers")
Signed-off-by: Bradley Morgan <[email protected]>
---
 kernel/rcu/hazptrtorture.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/hazptrtorture.c b/kernel/rcu/hazptrtorture.c
index 72aeb50668e9..7c8b5899fb01 100644
--- a/kernel/rcu/hazptrtorture.c
+++ b/kernel/rcu/hazptrtorture.c
@@ -555,7 +555,7 @@ static int hazptr_torture_do_pending(void *arg)
 			cpu = cpumask_next_wrap(cpu, cpu_possible_mask);
 			hazptr_torture_do_one_pending(cpu, &rand);
 		}
-		if (torture_must_stop())
+		if (!torture_must_stop())
 			torture_hrtimeout_ms(kthread_do_pending_ms, USEC_PER_MSEC, &rand);
 		// Omit stutter_wait() because this function needs to do cleanup.
 	} while (!torture_must_stop());
-- 
2.47.3