[PATCH v2 6/7] drm/i915: Use sleeping selftests for igt_atomic on PREEMPT_RT

[Maarten Lankhorst <dev@lankhorst.se>]

This makes the i915 selftests slightly happier, especially
related to GPU reset.

I believe this may be a better approach than trying to convert
uncore->lock to raw_spinlock

Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
---
 drivers/gpu/drm/i915/selftests/igt_atomic.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/selftests/igt_atomic.c b/drivers/gpu/drm/i915/selftests/igt_atomic.c
index fb506b6990956..8ae39cf570b76 100644
--- a/drivers/gpu/drm/i915/selftests/igt_atomic.c
+++ b/drivers/gpu/drm/i915/selftests/igt_atomic.c
@@ -39,7 +39,14 @@ static void __hardirq_end(void)
 	local_irq_enable();
 }
 
+static void __maybe_unused __nop(void)
+{}
+
 const struct igt_atomic_section igt_atomic_phases[] = {
+#if IS_ENABLED(CONFIG_PREEMPT_RT)
+	{ "sleeping", __nop, __nop },
+	{ },
+#endif
 	{ "preempt", __preempt_begin, __preempt_end },
 	{ "softirq", __softirq_begin, __softirq_end },
 	{ "hardirq", __hardirq_begin, __hardirq_end },
-- 
2.53.0