On Wed, Jan 09, 2019 at 09:49:17PM +0530, Souptick Joarder wrote: > convert to use vm_fault_t type as return type for > fault handler. I think you'll also need to convert hmm_devmem_fault(). And that's going to lead to some more spots. (It's important to note that this is the patch working as designed. It's throwing up warnings where code *hasn't* been converted to vm_fault_t yet but should have been).