Messages in this thread | | | Date | Wed, 4 May 2022 10:48:47 -0700 | From | Nathan Chancellor <> | Subject | Re: ld.lld: error: inline assembly requires more registers than available at line 523 |
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On Mon, May 02, 2022 at 06:29:38AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 672c0c5173427e6b3e2a9bbb7be51ceeec78093a > commit: ba1f77c546966c12d86220d078e5838dcaeab348 x86/kvm: Fix compilation warning in non-x86_64 builds > date: 2 months ago > config: i386-randconfig-a012-20220502 (https://download.01.org/0day-ci/archive/20220502/202205020637.JVJo3blw-lkp@intel.com/config) > compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 09325d36061e42b495d1f4c7e933e260eac260ed) > 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=ba1f77c546966c12d86220d078e5838dcaeab348 > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout ba1f77c546966c12d86220d078e5838dcaeab348 > # 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=i386 SHELL=/bin/bash > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com> > > All errors (new ones prefixed by >>): > > >> ld.lld: error: inline assembly requires more registers than available at line 523 > >> ld.lld: error: inline assembly requires more registers than available at line 523 >
I don't think this bisection result is correct; this error is visible at v5.17-rc3, which this commit is based on. This is likely the same root cause as https://github.com/ClangBuiltLinux/linux/issues/1589, just with LTO. I'll reduce something down and comment there if it turns out to be different.
Cheers, Nathan
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