On Mon, Oct 13, 2014 at 12:16:14PM +0100, Stefano Stabellini wrote: > On Fri, 10 Oct 2014, Stefano Stabellini wrote: > > On Fri, 10 Oct 2014, Will Deacon wrote: > > > On Fri, Oct 10, 2014 at 12:51:44PM +0100, Stefano Stabellini wrote: > > > > Introduce a function to check whether a device is dma coherent. > > > > > > > > Signed-off-by: Stefano Stabellini <[email protected]> > > > > CC: [email protected] > > > > CC: [email protected] > > > > CC: [email protected] > > > > CC: [email protected] > > > > --- > > > > arch/arm/include/asm/dma-mapping.h | 6 ++++++ > > > > arch/arm64/include/asm/dma-mapping.h | 5 +++++ > > > > 2 files changed, 11 insertions(+) > > > > > > > > diff --git a/arch/arm/include/asm/dma-mapping.h > > > > b/arch/arm/include/asm/dma-mapping.h > > > > index c45b61a..bededbb 100644 > > > > --- a/arch/arm/include/asm/dma-mapping.h > > > > +++ b/arch/arm/include/asm/dma-mapping.h > > > > @@ -126,6 +126,12 @@ static inline int set_arch_dma_coherent_ops(struct > > > > device *dev) > > > > set_dma_ops(dev, &arm_coherent_dma_ops); > > > > return 0; > > > > } > > > > + > > > > +static inline bool is_dma_coherent(struct device *dev) > > > > +{ > > > > + return (__generic_dma_ops(dev) == &arm_coherent_dma_ops); > > > > +} > > > > > > Hmm, what about the IOMMU ops? > > > > Maybe I should check __generic_dma_ops(dev) != &arm_dma_ops? > > Do you have any better suggestions? > > ping?
Without any clear idea about why this is needed or how it's used, I don't have any better ideas. Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
