23 	struct dma_fence *prev;  in dma_fence_chain_get_prev()  local
26 	prev = dma_fence_get_rcu_safe(&chain->prev);  in dma_fence_chain_get_prev()
28 	return prev;  in dma_fence_chain_get_prev()
42 	struct dma_fence *prev, *replacement, *tmp;  in dma_fence_chain_walk()  local
50 	while ((prev = dma_fence_chain_get_prev(chain))) {  in dma_fence_chain_walk()
52 		prev_chain = to_dma_fence_chain(prev);  in dma_fence_chain_walk()
59 			if (!dma_fence_is_signaled(prev))  in dma_fence_chain_walk()
65 		tmp = cmpxchg((struct dma_fence __force **)&chain->prev,  in dma_fence_chain_walk()
66 			      prev, replacement);  in dma_fence_chain_walk()
67 		if (tmp == prev)  in dma_fence_chain_walk()
71 		dma_fence_put(prev);  in dma_fence_chain_walk()
75 	return prev;  in dma_fence_chain_walk()
182 	struct dma_fence *prev;  in dma_fence_chain_release()  local
187 	while ((prev = rcu_dereference_protected(chain->prev, true))) {  in dma_fence_chain_release()
190 		if (kref_read(&prev->refcount) > 1)  in dma_fence_chain_release()
193 		prev_chain = to_dma_fence_chain(prev);  in dma_fence_chain_release()
200 		chain->prev = prev_chain->prev;  in dma_fence_chain_release()
201 		RCU_INIT_POINTER(prev_chain->prev, NULL);  in dma_fence_chain_release()
202 		dma_fence_put(prev);  in dma_fence_chain_release()
204 	dma_fence_put(prev);  in dma_fence_chain_release()
231 			  struct dma_fence *prev,  in dma_fence_chain_init()  argument
235 	struct dma_fence_chain *prev_chain = to_dma_fence_chain(prev);  in dma_fence_chain_init()
239 	rcu_assign_pointer(chain->prev, prev);  in dma_fence_chain_init()
245 	if (prev_chain && __dma_fence_is_later(seqno, prev->seqno, prev->ops)) {  in dma_fence_chain_init()
246 		context = prev->context;  in dma_fence_chain_init()
247 		chain->prev_seqno = prev->seqno;  in dma_fence_chain_init()
252 			seqno = max(prev->seqno, seqno);  in dma_fence_chain_init()