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-rw-r--r--include/linux/dma-fence.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
index 111aefe1c956..c053d19e1e24 100644
--- a/include/linux/dma-fence.h
+++ b/include/linux/dma-fence.h
@@ -166,7 +166,8 @@ struct dma_fence_ops {
* released when the fence is signalled (through e.g. the interrupt
* handler).
*
- * This callback is mandatory.
+ * This callback is optional. If this callback is not present, then the
+ * driver must always have signaling enabled.
*/
bool (*enable_signaling)(struct dma_fence *fence);