linux-kernel - [PATCH v3 4/5] drm/sched: Use drm sched lockdep map for submit

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Message-Id: <20240809222827.3211998-5-matthew.brost@intel.com>
Date: Fri,  9 Aug 2024 15:28:26 -0700
From: Matthew Brost <matthew.brost@...el.com>
To: intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: tj@...nel.org,
	jiangshanlai@...il.com,
	christian.koenig@....com,
	ltuikov89@...il.com,
	daniel@...ll.ch
Subject: [PATCH v3 4/5] drm/sched: Use drm sched lockdep map for submit_wq

Avoid leaking a lockdep map on each drm sched creation and destruction
by using a single lockdep map for all drm sched allocated submit_wq.

v2:
 - Use alloc_ordered_workqueue_lockdep_map (Tejun)

Cc: Luben Tuikov <ltuikov89@...il.com>
Cc: Christian König <christian.koenig@....com>
Signed-off-by: Matthew Brost <matthew.brost@...el.com>
---
 drivers/gpu/drm/scheduler/sched_main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index ab53ab486fe6..cf79d348cb32 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -87,6 +87,12 @@
 #define CREATE_TRACE_POINTS
 #include "gpu_scheduler_trace.h"
 
+#ifdef CONFIG_LOCKDEP
+static struct lockdep_map drm_sched_lockdep_map = {
+	.name = "drm_sched_lockdep_map"
+};
+#endif
+
 #define to_drm_sched_job(sched_job)		\
 		container_of((sched_job), struct drm_sched_job, queue_node)
 
@@ -1272,7 +1278,12 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
 		sched->submit_wq = submit_wq;
 		sched->own_submit_wq = false;
 	} else {
+#ifdef CONFIG_LOCKDEP
+		sched->submit_wq = alloc_ordered_workqueue_lockdep_map(name, 0,
+								       &drm_sched_lockdep_map);
+#else
 		sched->submit_wq = alloc_ordered_workqueue(name, 0);
+#endif
 		if (!sched->submit_wq)
 			return -ENOMEM;
 
-- 
2.34.1