Hi Uros, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/master] [also build test ERROR on mst-vhost/linux-next linux/master linus/master v5.18-rc7 next-20220518] [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/intel-lab-lkp/linux/commits/Uros-Bizjak/KVM-VMX-Use-try_cmpxchg64-in-pi_try_set_control/20220518-214709 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git master config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220519/202205191028.PcCtw7Xz-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 853fa8ee225edf2d0de94b0dcbd31bea916e825e) 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://github.com/intel-lab-lkp/linux/commit/2af4f7c4ecfcaedf9b98ba30ee508dc0d9002955 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Uros-Bizjak/KVM-VMX-Use-try_cmpxchg64-in-pi_try_set_control/20220518-214709 git checkout 2af4f7c4ecfcaedf9b98ba30ee508dc0d9002955 # 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 arch/x86/kvm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> arch/x86/kvm/vmx/posted_intr.c:45:7: error: call to undeclared function 'try_cmpxchg64'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] if (!try_cmpxchg64(&pi_desc->control, pold, new)) ^ arch/x86/kvm/vmx/posted_intr.c:45:7: note: did you mean '__cmpxchg64'? arch/x86/include/asm/cmpxchg_32.h:47:19: note: '__cmpxchg64' declared here static inline u64 __cmpxchg64(volatile u64 *ptr, u64 old, u64 new) ^ 1 error generated. vim +/try_cmpxchg64 +45 arch/x86/kvm/vmx/posted_intr.c 36 37 static int pi_try_set_control(struct pi_desc *pi_desc, u64 *pold, u64 new) 38 { 39 /* 40 * PID.ON can be set at any time by a different vCPU or by hardware, 41 * e.g. a device. PID.control must be written atomically, and the 42 * update must be retried with a fresh snapshot an ON change causes 43 * the cmpxchg to fail. 44 */ > 45 if (!try_cmpxchg64(&pi_desc->control, pold, new)) 46 return -EBUSY; 47 48 return 0; 49 } 50 -- 0-DAY CI Kernel Test Service https://01.org/lkp
