Messages in this thread | | | Date | Wed, 8 Feb 2023 15:37:52 +0800 | From | Yujie Liu <> | Subject | Re: arch/x86/crypto/curve25519-x86_64.c:609:3: error: inline assembly requires more registers than available |
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On Mon, Feb 06, 2023 at 09:51:42AM -0700, Nathan Chancellor wrote: > On Mon, Feb 06, 2023 at 11:52:01PM +0800, kernel test robot wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > head: d2d11f342b179f1894a901f143ec7c008caba43e > > commit: 07b586fe06625b0b610dc3d3a969c51913d143d4 crypto: x86/curve25519 - replace with formally verified implementation > > date: 3 years ago > > config: x86_64-buildonly-randconfig-r006-20230206 (https://download.01.org/0day-ci/archive/20230206/202302062324.HhzEZCF7-lkp@intel.com/config) > > compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) > > reproduce (this is a W=1 build): > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > > chmod +x ~/bin/make.cross > > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=07b586fe06625b0b610dc3d3a969c51913d143d4 > > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > git fetch --no-tags linus master > > git checkout 07b586fe06625b0b610dc3d3a969c51913d143d4 > > # save the config file > > mkdir build_dir && cp config build_dir/.config > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/crypto/ > > > > If you fix the issue, kindly add following tag where applicable > > | Reported-by: kernel test robot <lkp@intel.com> > > > > All errors (new ones prefixed by >>): > > > > arch/x86/crypto/curve25519-x86_64.c:954:6: warning: variable 'carry' set but not used [-Wunused-but-set-variable] > > u64 carry; > > ^ > > arch/x86/crypto/curve25519-x86_64.c:951:6: warning: variable 'carry0' set but not used [-Wunused-but-set-variable] > > u64 carry0; > > ^ > > >> arch/x86/crypto/curve25519-x86_64.c:609:3: error: inline assembly requires more registers than available > > " movq 0(%1), %%rdx;" /* f[0] */ > > ^ > > >> arch/x86/crypto/curve25519-x86_64.c:609:3: error: inline assembly requires more registers than available > > 2 warnings and 2 errors generated. > > https://github.com/ClangBuiltLinux/linux/issues/1589 > > Intel folks, this can probably just be sent to our list from now on.
Sorry for repeat reporting this clang issue to kernel developers. We've added a new rule to send similar reports to llvm list only.
-- Best Regards, Yujie
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