diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dma-fence-chain.h | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h index 10462a029da2..c6eb3aa45668 100644 --- a/include/linux/dma-fence-chain.h +++ b/include/linux/dma-fence-chain.h @@ -16,21 +16,36 @@ /** * struct dma_fence_chain - fence to represent an node of a fence chain * @base: fence base class - * @lock: spinlock for fence handling * @prev: previous fence of the chain * @prev_seqno: original previous seqno before garbage collection * @fence: encapsulated fence - * @cb: callback structure for signaling - * @work: irq work item for signaling + * @lock: spinlock for fence handling */ struct dma_fence_chain { struct dma_fence base; - spinlock_t lock; struct dma_fence __rcu *prev; u64 prev_seqno; struct dma_fence *fence; - struct dma_fence_cb cb; - struct irq_work work; + union { + /** + * @cb: callback for signaling + * + * This is used to add the callback for signaling the + * complection of the fence chain. Never used at the same time + * as the irq work. + */ + struct dma_fence_cb cb; + + /** + * @work: irq work item for signaling + * + * Irq work structure to allow us to add the callback without + * running into lock inversion. Never used at the same time as + * the callback. + */ + struct irq_work work; + }; + spinlock_t lock; }; extern const struct dma_fence_ops dma_fence_chain_ops; |