It turns out cxl actually uses it. So for now skip this patch, although random code in drivers messing with dma ops will need to be sorted out sooner or later.
- [PATCH 01/20] kernel/dma/direct: take DMA offset in... Christoph Hellwig
- Re: [PATCH 01/20] kernel/dma/direct: take DMA ... Benjamin Herrenschmidt
- Re: [PATCH 01/20] kernel/dma/direct: take ... Christoph Hellwig
- [PATCH 03/20] dma-mapping: make the get_required_ma... Christoph Hellwig
- [PATCH 04/20] ia64: remove get_required_mask implem... Christoph Hellwig
- [PATCH 05/20] swiotlb: allow the architecture to pr... Christoph Hellwig
- [PATCH 06/20] dma-noncoherent: add an optional arch... Christoph Hellwig
- [PATCH 07/20] powerpc/dma: remove the unused ARCH_H... Christoph Hellwig
- Re: [PATCH 07/20] powerpc/dma: remove the unus... Benjamin Herrenschmidt
- [PATCH 08/20] powerpc/dma: remove the unused dma_no... Christoph Hellwig
- Re: [PATCH 08/20] powerpc/dma: remove the unus... Christoph Hellwig
- Re: [PATCH 08/20] powerpc/dma: remove the ... Benjamin Herrenschmidt
- Re: [PATCH 08/20] powerpc/dma: remove ... Christoph Hellwig
- Re: [PATCH 08/20] powerpc/dma: rem... Benjamin Herrenschmidt
- [PATCH 09/20] powerpc/dma: remove the unused ISA_DM... Christoph Hellwig
- Re: [PATCH 09/20] powerpc/dma: remove the unus... Benjamin Herrenschmidt
- [PATCH 11/20] powerpc/dma: split the two __dma_allo... Christoph Hellwig
- Re: [PATCH 11/20] powerpc/dma: split the two _... Benjamin Herrenschmidt
- [PATCH 12/20] powerpc/dma: use phys_to_dma instead ... Christoph Hellwig
- Re: [PATCH 12/20] powerpc/dma: use phys_to_dma... Benjamin Herrenschmidt
- [PATCH 13/20] powerpc/dma: remove get_dma_offset Christoph Hellwig
