Hi Nicholas, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.14-rc3 next-20210723] [cannot apply to powerpc/next] [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/Nicholas-Piggin/KVM-PPC-Book3S-HV-P9-entry-exit-optimisations/20210726-115329 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git ff1176468d368232b684f75e82563369208bc371 config: powerpc-randconfig-r022-20210726 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c63dbd850182797bc4b76124d08e1c320ab2365d) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/0day-ci/linux/commit/d173e4690cf13578686dbbce48e1f81e925b96af git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nicholas-Piggin/KVM-PPC-Book3S-HV-P9-entry-exit-optimisations/20210726-115329 git checkout d173e4690cf13578686dbbce48e1f81e925b96af # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): arch/powerpc/kernel/process.c:612:33: error: no member named 'tm_tfhar' in 'struct thread_struct' current->thread.tm_tfhar = mfspr(SPRN_TFHAR); ~~~~~~~~~~~~~~~ ^ arch/powerpc/kernel/process.c:613:33: error: no member named 'tm_tfiar' in 'struct thread_struct' current->thread.tm_tfiar = mfspr(SPRN_TFIAR); ~~~~~~~~~~~~~~~ ^ arch/powerpc/kernel/process.c:614:33: error: no member named 'tm_texasr' in 'struct thread_struct' current->thread.tm_texasr = mfspr(SPRN_TEXASR); ~~~~~~~~~~~~~~~ ^ >> arch/powerpc/kernel/process.c:596:6: warning: no previous prototype for function 'save_user_regs_kvm' [-Wmissing-prototypes] void save_user_regs_kvm(void) ^ arch/powerpc/kernel/process.c:596:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void save_user_regs_kvm(void) ^ static >> arch/powerpc/kernel/process.c:611:16: warning: shift count >= width of type [-Wshift-count-overflow] if (usermsr & MSR_TM) { ^~~~~~ arch/powerpc/include/asm/reg.h:115:17: note: expanded from macro 'MSR_TM' #define MSR_TM __MASK(MSR_TM_LG) /* Transactional Mem Available */ ^~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/reg.h:66:23: note: expanded from macro '__MASK' #define __MASK(X) (1UL<<(X)) ^ ~~~ arch/powerpc/kernel/process.c:615:47: warning: shift count >= width of type [-Wshift-count-overflow] current->thread.regs->msr &= ~MSR_TM; ^~~~~~ arch/powerpc/include/asm/reg.h:115:17: note: expanded from macro 'MSR_TM' #define MSR_TM __MASK(MSR_TM_LG) /* Transactional Mem Available */ ^~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/reg.h:66:23: note: expanded from macro '__MASK' #define __MASK(X) (1UL<<(X)) ^ ~~~ 3 warnings and 3 errors generated. vim +/save_user_regs_kvm +596 arch/powerpc/kernel/process.c 595 > 596 void save_user_regs_kvm(void) 597 { 598 unsigned long usermsr; 599 600 if (!current->thread.regs) 601 return; 602 603 usermsr = current->thread.regs->msr; 604 605 if (usermsr & MSR_FP) 606 save_fpu(current); 607 608 if (usermsr & MSR_VEC) 609 save_altivec(current); 610 > 611 if (usermsr & MSR_TM) { 612 current->thread.tm_tfhar = mfspr(SPRN_TFHAR); 613 current->thread.tm_tfiar = mfspr(SPRN_TFIAR); 614 current->thread.tm_texasr = mfspr(SPRN_TEXASR); 615 current->thread.regs->msr &= ~MSR_TM; 616 } 617 } 618 EXPORT_SYMBOL_GPL(save_user_regs_kvm); 619 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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