drm/ttm: use RCU in ttm_bo_flush_all_fences
This allows it to call the function without the lock held. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: xinhui pan <xinhui.pan@amd.com> Link: https://patchwork.freedesktop.org/patch/352742/
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@ -429,22 +429,24 @@ static int ttm_bo_individualize_resv(struct ttm_buffer_object *bo)
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static void ttm_bo_flush_all_fences(struct ttm_buffer_object *bo)
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{
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struct dma_resv *resv = &bo->base._resv;
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struct dma_resv_list *fobj;
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struct dma_fence *fence;
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int i;
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fobj = dma_resv_get_list(&bo->base._resv);
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fence = dma_resv_get_excl(&bo->base._resv);
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rcu_read_lock();
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fobj = rcu_dereference(resv->fence);
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fence = rcu_dereference(resv->fence_excl);
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if (fence && !fence->ops->signaled)
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dma_fence_enable_sw_signaling(fence);
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for (i = 0; fobj && i < fobj->shared_count; ++i) {
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fence = rcu_dereference_protected(fobj->shared[i],
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dma_resv_held(bo->base.resv));
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fence = rcu_dereference(fobj->shared[i]);
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if (!fence->ops->signaled)
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dma_fence_enable_sw_signaling(fence);
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}
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rcu_read_unlock();
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}
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static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo)
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