On Mon, Jan 14, 2019 at 04:52:40PM +0000, Robin Murphy wrote: > 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? None of this will with such segments. But yes, I guess the old case could have worked as long as any physical contigous ranges are also virtually contigous. So we might have to throw in a page size segment boundary here.
