add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/arm/kernel/dma.c
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@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  linux/arch/arm/kernel/dma.c
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  *
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  *  Copyright (C) 1995-2000 Russell King
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  *
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  *  Front-end to the DMA handling.  This handles the allocation/freeing
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  *  of DMA channels, and provides a unified interface to the machines