dma-mapping: better document dma_addr_t and DMA_MAPPING_ERROR
authorChristoph Hellwig <hch@lst.de>
Fri, 11 Sep 2020 07:33:42 +0000 (09:33 +0200)
committerChristoph Hellwig <hch@lst.de>
Fri, 25 Sep 2020 04:14:29 +0000 (06:14 +0200)
commiteba304c6861613a649ba46cfab835b1eddeacd8e
tree8977fcb52e599b1c0443a8e70ba4e238b782d50a
parentdb4268f8c575617bacdeff862c7de674dbf65075
dma-mapping: better document dma_addr_t and DMA_MAPPING_ERROR

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 <hch@lst.de>
include/linux/dma-mapping.h