> index aba7138..e2c5d9e 100644 > --- a/arch/mips/include/asm/dma-mapping.h > +++ b/arch/mips/include/asm/dma-mapping.h > @@ -39,4 +39,6 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, > #endif > } > > +int mips_get_cache_alignment(struct device *dev); All the other mips generic dma helpers are prefixed mips_dma_* so it might make sense to follow that. Also please don't add arch-local helpers to asm/dma-mapping.h - this is a header used by linux/dma-mapping.h and should not contain implementation details if avoidable. > + dma_get_cache_alignment(NULL)) / mdev->limits.mtt_seg_size; As said before - please don't pass NULL to this function but the proper device, which would be &mdev->pdev->dev in this case for example.