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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/sparc/include/asm/dma-mapping.h
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..
@@ -2,25 +2,12 @@
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 #ifndef ___ASM_SPARC_DMA_MAPPING_H
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 #define ___ASM_SPARC_DMA_MAPPING_H
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-#include <linux/scatterlist.h>
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-#include <linux/mm.h>
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-#include <linux/dma-debug.h>
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-
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 extern const struct dma_map_ops *dma_ops;
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-
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-extern struct bus_type pci_bus_type;
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 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
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 {
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-#ifdef CONFIG_SPARC_LEON
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-	if (sparc_cpu_model == sparc_leon)
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-		return &dma_noncoherent_ops;
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-#endif
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-#if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
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-	if (bus == &pci_bus_type)
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-		return &dma_noncoherent_ops;
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-#endif
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-	return dma_ops;
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+	/* sparc32 uses per-device dma_ops */
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+	return IS_ENABLED(CONFIG_SPARC64) ? dma_ops : NULL;
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 }
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 #endif