On Tue, Sep 22, 2020 at 01:56:46PM +, David Laight wrote:
> > +/*
> > + * A dma_addr_t can hold any valid DMA or bus address for the platform.
> > It can
> > + * be given to a device to use as a DMA source or target. A CPU cannot
> > + * reference a dma_addr_t directly because there may be
From: Christoph Hellwig
> Sent: 22 September 2020 14:40
...
> @@ -131,6 +125,16 @@ struct dma_map_ops {
> unsigned long (*get_merge_boundary)(struct device *dev);
> };
>
> +/*
> + * A dma_addr_t can hold any valid DMA or bus address for the platform. It
> can
> + * be given to a device
Move the comment documenting dma_addr_t away from the dma_map_ops
definition which isn't very related to it, and toward DMA_MAPPING_ERROR,
which is somewhat related. Add a little blurb about DMA_MAPPING_ERROR
as well.
Signed-off-by: Christoph Hellwig
---
include/linux/dma-mapping.h | 16
