[PATCH v18 14/42] dept: apply sdt_might_sleep_{start,end}() to dma fence
From: Byungchul Park <byungchul@sk.com>
Date: 2025-12-05 07:19:41
Also in:
dri-devel, linux-arch, linux-block, linux-doc, linux-ext4, linux-fsdevel, linux-i2c, linux-ide, linux-media, linux-mm, linux-modules, linux-nfs, linux-rt-devel, lkml, rcu, rust-for-linux
Subsystem:
dma buffer sharing framework, sync file framework, the rest · Maintainers:
Sumit Semwal, Christian König, Linus Torvalds
Make dept able to track dependencies by dma fence waits and signals. 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 b4f5c8635276..b313bb59dc9c 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>
@@ -798,6 +799,7 @@ 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);
@@ -811,6 +813,7 @@ 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);
@@ -900,6 +903,7 @@ 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);
@@ -914,6 +918,7 @@ 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