--- zzzz-none-000/linux-4.4.271/arch/arm64/mm/flush.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/arch/arm64/mm/flush.c	2023-04-19 10:22:27.000000000 +0000
@@ -111,3 +111,21 @@
 }
 #endif /* CONFIG_HAVE_RCU_TABLE_FREE */
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+void dmac_flush_range(const void *start, const void *end)
+{
+	__dma_flush_range(start, end);
+}
+EXPORT_SYMBOL(dmac_flush_range);
+
+void dmac_inv_range(const void *start, const void *end)
+{
+	__dma_inv_range(start, end);
+}
+EXPORT_SYMBOL(dmac_inv_range);
+
+void dmac_clean_range(const void *start, const void *end)
+{
+	__dma_clean_range(start, end);
+}
+EXPORT_SYMBOL(dmac_clean_range);