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Diffstat (limited to 'include/linux/dma-fence-chain.h')
-rw-r--r--include/linux/dma-fence-chain.h18
1 files changed, 16 insertions, 2 deletions
diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h
index 54fe3443fd2c..10d51bcdf7b7 100644
--- a/include/linux/dma-fence-chain.h
+++ b/include/linux/dma-fence-chain.h
@@ -49,7 +49,6 @@ struct dma_fence_chain {
spinlock_t lock;
};
-extern const struct dma_fence_ops dma_fence_chain_ops;
/**
* to_dma_fence_chain - cast a fence to a dma_fence_chain
@@ -61,13 +60,28 @@ extern const struct dma_fence_ops dma_fence_chain_ops;
static inline struct dma_fence_chain *
to_dma_fence_chain(struct dma_fence *fence)
{
- if (!fence || fence->ops != &dma_fence_chain_ops)
+ if (!fence || !dma_fence_is_chain(fence))
return NULL;
return container_of(fence, struct dma_fence_chain, base);
}
/**
+ * dma_fence_chain_contained - return the contained fence
+ * @fence: the fence to test
+ *
+ * If the fence is a dma_fence_chain the function returns the fence contained
+ * inside the chain object, otherwise it returns the fence itself.
+ */
+static inline struct dma_fence *
+dma_fence_chain_contained(struct dma_fence *fence)
+{
+ struct dma_fence_chain *chain = to_dma_fence_chain(fence);
+
+ return chain ? chain->fence : fence;
+}
+
+/**
* dma_fence_chain_alloc
*
* Returns a new struct dma_fence_chain object or NULL on failure.