[PATCH 1/7] dma-buf: add some more kerneldoc to dma_resv_add_shared_fence

[Christian König]

Explicitly document that code can't assume that shared fences
signal after the exclusive fence.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/dma-buf/dma-resv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
index f26c71747d43..4ab02b6c387a 100644
--- a/drivers/dma-buf/dma-resv.c
+++ b/drivers/dma-buf/dma-resv.c
@@ -235,7 +235,10 @@ EXPORT_SYMBOL(dma_resv_reset_shared_max);
  * @fence: the shared fence to add
  *
  * Add a fence to a shared slot, obj->lock must be held, and
- * dma_resv_reserve_shared() has been called.
+ * dma_resv_reserve_shared() has been called. The shared fences can signal in
+ * any order and there is especially no guarantee that shared fences signal
+ * after the exclusive one. Code relying on any signaling order is broken and
+ * needs to be fixed.
  */
 void dma_resv_add_shared_fence(struct dma_resv *obj, struct dma_fence *fence)
 {
-- 
2.25.1