Hi Huacai, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v6.0-rc1 next-20220816] [cannot apply to soc/for-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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Huacai-Chen/LoongArch-Add-perf-events-support/20220815-204852 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 config: loongarch-randconfig-s051-20220815 (https://download.01.org/0day-ci/archive/20220816/202208161648.zq48ilEV-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 12.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/0e6d9490ff3f6129799675b9288135022a0908e2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Huacai-Chen/LoongArch-Add-perf-events-support/20220815-204852 git checkout 0e6d9490ff3f6129799675b9288135022a0908e2 # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=loongarch If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> arch/loongarch/kernel/perf_event.c:30:50: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned long [noderef] __user *user_frame_tail @@ got unsigned long * @@ arch/loongarch/kernel/perf_event.c:30:50: sparse: expected unsigned long [noderef] __user *user_frame_tail arch/loongarch/kernel/perf_event.c:30:50: sparse: got unsigned long * arch/loongarch/kernel/perf_event.c: note: in included file (through arch/loongarch/include/asm/cpu-info.h, arch/loongarch/include/asm/processor.h, ...): arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: undefined identifier '__builtin_loongarch_csrrd_d' arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: undefined identifier '__builtin_loongarch_csrwr_d' arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:237:16: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type arch/loongarch/include/asm/loongarch.h:247:9: sparse: sparse: cast from unknown type vim +30 arch/loongarch/kernel/perf_event.c 20 21 /* 22 * Get the return address for a single stackframe and return a pointer to the 23 * next frame tail. 24 */ 25 static unsigned long 26 user_backtrace(struct perf_callchain_entry_ctx *entry, unsigned long fp) 27 { 28 struct stack_frame buftail; 29 unsigned long err; > 30 unsigned long __user *user_frame_tail = (unsigned long *)(fp - sizeof(struct stack_frame)); 31 32 /* Also check accessibility of one struct frame_tail beyond */ 33 if (!access_ok(user_frame_tail, sizeof(buftail))) 34 return 0; 35 36 pagefault_disable(); 37 err = __copy_from_user_inatomic(&buftail, user_frame_tail, sizeof(buftail)); 38 pagefault_enable(); 39 40 if (err || (unsigned long)user_frame_tail >= buftail.fp) 41 return 0; 42 43 perf_callchain_store(entry, buftail.ra); 44 45 return buftail.fp; 46 } 47 -- 0-DAY CI Kernel Test Service https://01.org/lkp
