On Thu, Jun 13, 2019 at 11:43:24AM +0200, Christoph Hellwig wrote: > All the mm/hmm.c code is better keyed off HMM_MIRROR. Also let nouveau > depend on it instead of the mix of a dummy dependency symbol plus the > actually selected one. Drop various odd dependencies, as the code is > pretty portable. I don't really know, but I thought this needed the arch restriction for the same reason get_user_pages has various unique arch specific implementations (it does seem to have some open coded GUP like thing)? I was hoping we could do this after your common gup series? But sooner is better too. Jason