[PATCH v14 15/28] dept: Apply sdt_might_sleep_{start,end}() to dma fence wait

Byungchul Park
2024-05-08T10:02:59Z

Makes Dept able to track dma fence waits.

Signed-off-by: Byungchul Park <byungchul@sk.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 0393a9bba3a8..d6f9b339b143 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