linux-kernel - [PATCH v12 15/27] dept: Apply sdt_might_sleep

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Message-Id: <20240221094933.36348-16-byungchul@sk.com>
Date: Wed, 21 Feb 2024 18:49:21 +0900
From: Byungchul Park <byungchul@...com>
To: linux-kernel@...r.kernel.org
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Subject: [PATCH v12 15/27] dept: Apply sdt_might_sleep_{start,end}() to dma fence wait

Makes Dept able to track dma fence waits.

Signed-off-by: Byungchul Park <byungchul@...com>
---
 drivers/dma-buf/dma-fence.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 8aa8f8cb7071..76dba11f0dab 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -16,6 +16,7 @@
 #include <linux/dma-fence.h>
 #include <linux/sched/signal.h>
 #include <linux/seq_file.h>
+#include <linux/dept_sdt.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/dma_fence.h>
@@ -783,6 +784,7 @@ dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout)
 	cb.task = current;
 	list_add(&cb.base.node, &fence->cb_list);
 
+	sdt_might_sleep_start(NULL);
 	while (!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) && ret > 0) {
 		if (intr)
 			__set_current_state(TASK_INTERRUPTIBLE);
@@ -796,6 +798,7 @@ dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout)
 		if (ret > 0 && intr && signal_pending(current))
 			ret = -ERESTARTSYS;
 	}
+	sdt_might_sleep_end();
 
 	if (!list_empty(&cb.base.node))
 		list_del(&cb.base.node);
@@ -885,6 +888,7 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
 		}
 	}
 
+	sdt_might_sleep_start(NULL);
 	while (ret > 0) {
 		if (intr)
 			set_current_state(TASK_INTERRUPTIBLE);
@@ -899,6 +903,7 @@ dma_fence_wait_any_timeout(struct dma_fence **fences, uint32_t count,
 		if (ret > 0 && intr && signal_pending(current))
 			ret = -ERESTARTSYS;
 	}
+	sdt_might_sleep_end();
 
 	__set_current_state(TASK_RUNNING);
 
-- 
2.17.1