On Mon, Sep 10, 2018 at 06:13:50PM +0200, Greg Kroah-Hartman wrote: > > +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ > > + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ > > + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) > > + bool dma_coherent:1; > > +#endif > > It's just one bit, why not always have it enabled here? If the arch > uses it or doesn't, no big deal. > > Or are you using this to "catch" arches that mess something up? Yes, that is the intent - I don't want architectures to accidentally set it while not selecting the non-coherent infrastructure, as it won't have an effect.
