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@@ -1,4 +1,8 @@
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-/* Copyright 2018 Canaan Inc.
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+/*
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+ * SPDX-License-Identifier: Apache-2.0
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+ *
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+ * Copyright 2018 Canaan Inc.
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+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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