Messages in this thread | | | Date | Sat, 29 Jun 2019 08:09:15 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH 6/7] dma-direct: handle DMA_ATTR_NO_KERNEL_MAPPING in common code |
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On Fri, Jun 14, 2019 at 04:44:30PM +0200, Christoph Hellwig wrote: > DMA_ATTR_NO_KERNEL_MAPPING is generally implemented by allocating > normal cacheable pages or CMA memory, and then returning the page > pointer as the opaque handle. Lift that code from the xtensa and > generic dma remapping implementations into the generic dma-direct > code so that we don't even call arch_dma_alloc for these allocations. > > Signed-off-by: Christoph Hellwig <hch@lst.de>
This patch results in build failures for mips:nlm_xlp_defconfig and mips:cavium_octeon_defconfig.
kernel/dma/direct.c:144: undefined reference to `arch_dma_prep_coherent'
Reverting the patch fixes the problem.
Guenter
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