On 14/01/2019 09:57, Christoph Hellwig wrote:
Hi everyone, this series converts the remaining MMC host drivers to properly kmap the scatterlist entries it does PIO operations on, and then goes on to remove the usage of block layer bounce buffering (which I plan to remove eventually) from the MMC layer. As a bonus I've converted various drivers to the proper scatterlist helpers so that at least in theory they are ready for chained scatterlists. All the changes are compile tested only as I don't have any of the hardware, so a careful review would be appreciated.
One general point for the kmap() conversions - it's not obvious (to me at least) whether or how that would work for a segment where sg->length > PAGE_SIZE. Or is there some cast-iron guarantee from the MMC mid-layer that it will never let the block layer generate such things in the first place?
Robin.
