On Mon, Apr 16, 2018 at 10:47 AM, Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > On Mon, Apr 16, 2018 at 09:14:48AM -0700, Dan Williams wrote: >> > - rc = vm_insert_mixed(vmf->vma, vmf->address, pfn); >> > - >> > - if (rc == -ENOMEM) >> > - return VM_FAULT_OOM; >> > - if (rc < 0 && rc != -EBUSY) >> > - return VM_FAULT_SIGBUS; >> > - >> > - return VM_FAULT_NOPAGE; >> > + return vmf_insert_mixed(vmf->vma, vmf->address, pfn); >> >> Ugh, so this change to vmf_insert_mixed() went upstream without fixing >> the users? This changelog is now misleading as it does not mention >> that is now an urgent standalone fix. On first read I assumed this was >> part of a wider effort for 4.18. > > You read too quickly. vmf_insert_mixed() is a *new* function which > *replaces* vm_insert_mixed() and > awful-mangling-of-return-values-done-per-driver. > > Eventually vm_insert_mixed() will be deleted. But today is not that day. Ah, ok, thanks for the clarification. Then this patch should definitely be re-titled to "dax: convert to the new vmf_insert_mixed() helper". The vm_fault_t conversion is just a minor side-effect of that larger change. I assume this can wait for v4.18.
