write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/arch/x86/include/asm/dma-mapping.h
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@@ -3,24 +3,15 @@
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 #define _ASM_X86_DMA_MAPPING_H
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 /*
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- * IOMMU interface. See Documentation/DMA-API-HOWTO.txt and
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- * Documentation/DMA-API.txt for documentation.
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+ * IOMMU interface. See Documentation/core-api/dma-api-howto.rst and
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+ * Documentation/core-api/dma-api.rst for documentation.
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  */
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 #include <linux/scatterlist.h>
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-#include <linux/dma-debug.h>
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 #include <asm/io.h>
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 #include <asm/swiotlb.h>
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-#include <linux/dma-contiguous.h>
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-
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-#ifdef CONFIG_ISA
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-# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
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-#else
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-# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
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-#endif
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 extern int iommu_merge;
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-extern struct device x86_dma_fallback_dev;
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 extern int panic_on_overflow;
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 extern const struct dma_map_ops *dma_ops;
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@@ -29,8 +20,5 @@
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 {
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 	return dma_ops;
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 }
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-
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-bool arch_dma_alloc_attrs(struct device **dev);
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-#define arch_dma_alloc_attrs arch_dma_alloc_attrs
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 #endif