[rppt:uffd+guestmemfd/v1 4/5] arch/x86/kvm/../../../virt/kvm/guest_memfd.c:376:10: error: use of undeclared identifier 'VM_FAULT_USERFAULTFD'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git uffd+guestmemfd/v1
head:   37911e172b33e52e4e224da52775c714483c8a90
commit: bf20f42e7ef8a03b1df8aca27e5159b87f7d40ea [4/5] guest_memfd: add support for userfaultfd minor mode
config: x86_64-randconfig-075-20251122 (https://download.01.org/0day-ci/archive/20251122/202511222133.qIuQVc3r-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251122/202511222133.qIuQVc3r-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511222133.qIuQVc3r-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/kvm/../../../virt/kvm/guest_memfd.c:376:10: error: use of undeclared identifier 'VM_FAULT_USERFAULTFD'
     376 |                 return VM_FAULT_USERFAULTFD;
         |                        ^
   1 error generated.


vim +/VM_FAULT_USERFAULTFD +376 arch/x86/kvm/../../../virt/kvm/guest_memfd.c

   350	
   351	static vm_fault_t kvm_gmem_fault_user_mapping(struct vm_fault *vmf)
   352	{
   353		struct inode *inode = file_inode(vmf->vma->vm_file);
   354		struct folio *folio;
   355		vm_fault_t ret = VM_FAULT_LOCKED;
   356	
   357		if (((loff_t)vmf->pgoff << PAGE_SHIFT) >= i_size_read(inode))
   358			return VM_FAULT_SIGBUS;
   359	
   360		if (!((u64)inode->i_private & GUEST_MEMFD_FLAG_INIT_SHARED))
   361			return VM_FAULT_SIGBUS;
   362	
   363		folio = kvm_gmem_get_folio(inode, vmf->pgoff);
   364		if (IS_ERR(folio)) {
   365			int err = PTR_ERR(folio);
   366	
   367			if (err == -EAGAIN)
   368				return VM_FAULT_RETRY;
   369	
   370			return vmf_error(err);
   371		}
   372	
   373		if (userfaultfd_minor(vmf->vma)) {
   374			folio_unlock(folio);
   375			folio_put(folio);
 > 376			return VM_FAULT_USERFAULTFD;
   377		}
   378	
   379		if (WARN_ON_ONCE(folio_test_large(folio))) {
   380			ret = VM_FAULT_SIGBUS;
   381			goto out_folio;
   382		}
   383	
   384		if (!folio_test_uptodate(folio)) {
   385			clear_highpage(folio_page(folio, 0));
   386			kvm_gmem_mark_prepared(folio);
   387		}
   388	
   389		vmf->page = folio_file_page(folio, vmf->pgoff);
   390	
   391	out_folio:
   392		if (ret != VM_FAULT_LOCKED) {
   393			folio_unlock(folio);
   394			folio_put(folio);
   395		}
   396	
   397		return ret;
   398	}
   399	

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