tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.4 head: 27906e76d6f6e08df0aad4c890642688db24de49 commit: 27906e76d6f6e08df0aad4c890642688db24de49 [39/39] tools lib traceevent: Fix memory leak in process_dynamic_array_len config: x86_64-randconfig-a004-20200807 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project aa57cabae2fc5abc08ab3e17b45f2890fc7c9e42) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 27906e76d6f6e08df0aad4c890642688db24de49 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/hardirq.h:8: In file included from arch/x86/include/asm/hardirq.h:5: In file included from include/linux/irq.h:418: In file included from arch/x86/include/asm/hw_irq.h:26: In file included from arch/x86/include/asm/sections.h:5: arch/x86/include/asm/uaccess.h:754:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) ~~ ^ ~ include/linux/compiler.h:181:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:8: In file included from include/linux/interrupt.h:12: In file included from include/linux/hardirq.h:8: In file included from arch/x86/include/asm/hardirq.h:5: In file included from include/linux/irq.h:418: In file included from arch/x86/include/asm/hw_irq.h:26: In file included from arch/x86/include/asm/sections.h:5: arch/x86/include/asm/uaccess.h:772:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) ~~ ^ ~ include/linux/compiler.h:181:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/sched.h:61: In file included from include/linux/cgroup-defs.h:16: include/linux/percpu-refcount.h:177:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_add(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:171:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/sched.h:61: In file included from include/linux/cgroup-defs.h:16: include/linux/percpu-refcount.h:276:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_sub(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:536:33: note: expanded from macro 'this_cpu_sub' #define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:475:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from mm/vmscan.c:20: In file included from include/linux/swap.h:8: include/linux/memcontrol.h:298:2: warning: comparison of integers of different signs: 'unsigned int' and 'int' [-Wsign-compare] this_cpu_add(memcg->stat->events[idx], nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:191:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ mm/vmscan.c:321:12: warning: comparison of integers of different signs: 'unsigned long long' and 'long' [-Wsign-compare] if (delta < freeable / 4) ~~~~~ ^ ~~~~~~~~~~~~ mm/vmscan.c:2580:29: warning: comparison of integers of different signs: 'int' and 'enum zone_type' [-Wsign-compare] zonelist_zone_idx(z) <= requested_highidx && ~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ 8 warnings generated. /tmp/vmscan-202340.s: Assembler messages: /tmp/vmscan-202340.s:3740: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/vmscan-202340.s:3766: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/vmscan-202340.s:4005: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/vmscan-202340.s:7259: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/vmscan-202340.s:8582: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/vmscan-202340.s:10229: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/vmscan-202340.s:10232: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/vmscan-202340.s:10788: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/vmscan-202340.s:10791: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org