[PATCH v19 14/40] dept: apply sdt_might_sleep_{start,end}() to dma fence

Byungchul Park <[email protected]>
Newsgroups gmane.linux.block,gmane.linux.kernel,gmane.linux.ide,gmane.comp.file-systems.ext4,gmane.linux.kernel.mm,gmane.linux.file-systems,gmane.comp.video.dri.devel,gmane.linux.network,gmane.linux.documentation,gmane.linux.ports.arm.kernel,gmane.linux.drivers.video-input-infrastructure,gmane.linux.drivers.i2c,gmane.linux.kernel.cross-arch,gmane.linux.kernel.modules,gmane.linux.nfs,gmane.linux.kernel.rust
Message-ID <[email protected]>
Make dept able to track dependencies by dma fence waits and signals.

Signed-off-by: Byungchul Park <[email protected]>
---
 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 35afcfcac591..f7498c770035 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>
@@ -822,6 +823,7 @@ 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 (!dma_fence_test_signaled_flag(fence) && ret > 0) {
 		if (intr)
 			__set_current_state(TASK_INTERRUPTIBLE);
@@ -835,6 +837,7 @@ 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);
@@ -924,6 +927,7 @@ 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);
@@ -938,6 +942,7 @@ 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
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