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ade1229cae
The get_arch_dma_ops() arch-specific function never does anything with the struct bus_type that is passed into it, so remove it entirely as it is not needed. Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: x86@kernel.org Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: linux-alpha@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-ia64@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: iommu@lists.linux.dev Cc: linux-arch@vger.kernel.org Acked-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20230214140121.131859-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
29 lines
996 B
C
29 lines
996 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PARISC_DMA_MAPPING_H
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#define _PARISC_DMA_MAPPING_H
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/*
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** We need to support 4 different coherent dma models with one binary:
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**
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** I/O MMU consistent method dma_sync behavior
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** ============= ====================== =======================
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** a) PA-7x00LC uncachable host memory flush/purge
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** b) U2/Uturn cachable host memory NOP
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** c) Ike/Astro cachable host memory NOP
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** d) EPIC/SAGA memory on EPIC/SAGA flush/reset DMA channel
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**
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** PA-7[13]00LC processors have a GSC bus interface and no I/O MMU.
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**
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** Systems (eg PCX-T workstations) that don't fall into the above
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** categories will need to modify the needed drivers to perform
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** flush/purge and allocate "regular" cacheable pages for everything.
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*/
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extern const struct dma_map_ops *hppa_dma_ops;
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static inline const struct dma_map_ops *get_arch_dma_ops(void)
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{
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return hppa_dma_ops;
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}
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#endif
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