OpenCloudOS-Kernel/include/asm-generic/dma-mapping.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_DMA_MAPPING_H
#define _ASM_GENERIC_DMA_MAPPING_H

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
	return NULL;
}

#endif /* _ASM_GENERIC_DMA_MAPPING_H */
dma-mapping: provide a generic asm/dma-mapping.h For architectures that just use the generic dma_noop_ops we can provide a generic version of dma-mapping.h. Signed-off-by: Christoph Hellwig <hch@lst.de> 2017-12-23 17:56:51 +08:00			`/* SPDX-License-Identifier: GPL-2.0 */`
			`#ifndef _ASM_GENERIC_DMA_MAPPING_H`
			`#define _ASM_GENERIC_DMA_MAPPING_H`

			`static inline const struct dma_map_ops get_arch_dma_ops(struct bus_type bus)`
			`{`
dma-mapping: bypass indirect calls for dma-direct Avoid expensive indirect calls in the fast path DMA mapping operations by directly calling the dma_direct_* ops if we are using the directly mapped DMA operations. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> 2018-12-07 05:39:32 +08:00			`return NULL;`
dma-mapping: provide a generic asm/dma-mapping.h For architectures that just use the generic dma_noop_ops we can provide a generic version of dma-mapping.h. Signed-off-by: Christoph Hellwig <hch@lst.de> 2017-12-23 17:56:51 +08:00			`}`

			`#endif /* _ASM_GENERIC_DMA_MAPPING_H */`