[RESEND x4][PATCH 2/3] test-ww_mutex: Move work to its own UNBOUND workqueue

[John Stultz <jstultz@google.com>]

The test-ww_mutex test already allocates its own workqueue
so be sure to use it for the mtx.work and abba.work rather
then the default system workqueue.

This resolves numerous messages of the sort:
"workqueue: test_abba_work hogged CPU... consider switching to WQ_UNBOUND"
"workqueue: test_mutex_work hogged CPU... consider switching to WQ_UNBOUND"

Signed-off-by: John Stultz <jstultz@google.com>
---
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Joel Fernandes <joelagnelf@nvidia.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: kernel-team@android.com
---
 kernel/locking/test-ww_mutex.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c
index d27aaaa860a36..30512b3e95c99 100644
--- a/kernel/locking/test-ww_mutex.c
+++ b/kernel/locking/test-ww_mutex.c
@@ -72,7 +72,7 @@ static int __test_mutex(struct ww_class *class, unsigned int flags)
 	init_completion(&mtx.done);
 	mtx.flags = flags;
 
-	schedule_work(&mtx.work);
+	queue_work(wq, &mtx.work);
 
 	wait_for_completion(&mtx.ready);
 	ww_mutex_lock(&mtx.mutex, (flags & TEST_MTX_CTX) ? &ctx : NULL);
@@ -234,7 +234,7 @@ static int test_abba(struct ww_class *class, bool trylock, bool resolve)
 	abba.trylock = trylock;
 	abba.resolve = resolve;
 
-	schedule_work(&abba.work);
+	queue_work(wq, &abba.work);
 
 	ww_acquire_init_noinject(&ctx, class);
 	if (!trylock)
-- 
2.52.0.rc1.455.g30608eb744-goog