On Wed, Nov 18, 2020 at 11:23:55AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git tip-x86-sgx > head: 56e2d0eff4f8db87cf77d9c8481041878177c680 > commit: 4b634f57cac2e1d28cfa0ca961e561362fc3f957 [11/25] x86/sgx: Add an SGX misc driver interface > config: x86_64-allyesconfig (attached as .config) > compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 > reproduce (this is a W=1 build): > # https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git/commit/?id=4b63... > git remote add bp https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git > git fetch --no-tags bp tip-x86-sgx > git checkout 4b634f57cac2e1d28cfa0ca961e561362fc3f957 > # save the attached .config to linux build tree > make W=1 ARCH=x86_64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All warnings (new ones prefixed by >>): > > In file included from arch/x86/kernel/cpu/sgx/driver.c:11: > arch/x86/kernel/cpu/sgx/encl.h: In function 'sgx_encl_find': > >> arch/x86/kernel/cpu/sgx/encl.h:45:19: warning: variable 'encl' set but not used [-Wunused-but-set-variable] > 45 | struct sgx_encl *encl; > | ^~~~ > > vim +/encl +45 arch/x86/kernel/cpu/sgx/encl.h > > 40 > 41 static inline int sgx_encl_find(struct mm_struct *mm, unsigned long addr, > 42 struct vm_area_struct **vma) > 43 { > 44 struct vm_area_struct *result; > > 45 struct sgx_encl *encl; > 46 > 47 result = find_vma(mm, addr); > 48 if (!result || result->vm_ops != &sgx_vm_ops || addr < result->vm_start) > 49 return -EINVAL; > 50 > 51 encl = result->vm_private_data; Looks like that encl needs to go, judging by: * Do not check !vm_private_data in sgx_encl_find(), as the enclave is created at VFS open. in patch 11. Jarkko?

-- Regards/Gruss, Boris. SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg