Content-Type: multipart/mixed; boundary="===============3973026158290586223==" MIME-Version: 1.0 From: kernel test robot To: kbuild-all@lists.01.org Subject: Re: [PATCH] crypto: crypto_xor - use helpers for unaligned accesses Date: Wed, 16 Feb 2022 01:01:32 +0800 Message-ID: <202202160048.w2jucJCP-lkp@intel.com> In-Reply-To: <20220215105717.184572-1-ardb@kernel.org> List-Id: --===============3973026158290586223== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Hi Ard, I love your patch! Perhaps something to improve: [auto build test WARNING on herbert-cryptodev-2.6/master] [also build test WARNING on herbert-crypto-2.6/master v5.17-rc4 next-202202= 15] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Ard-Biesheuvel/crypto-cryp= to_xor-use-helpers-for-unaligned-accesses/20220215-185741 base: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2= .6.git master config: i386-randconfig-a003 (https://download.01.org/0day-ci/archive/20220= 216/202202160048.w2jucJCP-lkp(a)intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=3D1 build): # https://github.com/0day-ci/linux/commit/6ca2d09816a67230ab30f3c7e= 7d87815e833d0af git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ard-Biesheuvel/crypto-crypto_xor-u= se-helpers-for-unaligned-accesses/20220215-185741 git checkout 6ca2d09816a67230ab30f3c7e7d87815e833d0af # save the config file to linux build tree mkdir build_dir make W=3D1 O=3Dbuild_dir ARCH=3Di386 SHELL=3D/bin/bash arch/x86/ker= nel/ drivers/md/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from ./arch/x86/include/generated/asm/unaligned.h:1, from drivers/md/dm-crypt.c:30: drivers/md/dm-crypt.c: In function 'crypt_iv_tcw_whitening': >> include/asm-generic/unaligned.h:14:8: warning: 'buf.x' is used uninitial= ized in this function [-Wuninitialized] 14 | __pptr->x; \ | ^~ >> include/asm-generic/unaligned.h:14:8: warning: '*((void *)&buf+4).x' is = used uninitialized in this function [-Wuninitialized] include/asm-generic/unaligned.h:14:8: warning: '*((void *)&buf+8).x' is = used uninitialized in this function [-Wuninitialized] include/asm-generic/unaligned.h:14:8: warning: '*((void *)&buf+12).x' is= used uninitialized in this function [-Wuninitialized] vim +14 include/asm-generic/unaligned.h aafe4dbed0bf6c Arnd Bergmann 2009-05-13 11 = 803f4e1eab7a89 Arnd Bergmann 2021-05-08 12 #define __get_unaligned_t(type= , ptr) ({ \ 803f4e1eab7a89 Arnd Bergmann 2021-05-08 13 const struct { type x; } __pa= cked *__pptr =3D (typeof(__pptr))(ptr); \ 803f4e1eab7a89 Arnd Bergmann 2021-05-08 @14 __pptr->x; \ 803f4e1eab7a89 Arnd Bergmann 2021-05-08 15 }) 803f4e1eab7a89 Arnd Bergmann 2021-05-08 16 = --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org --===============3973026158290586223==--