tree: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/core head: 3dc65994e3c1c999be3d991cdc96705e167cb3b1 commit: 5d4648a0415efc239ffb377bce1d389723eda25d [35/39] tracing/boot: Show correct histogram error command config: x86_64-randconfig-a015-20210831 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4b1fde8a2b681dad2ce0c082a5d6422caa06b0bc) 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/rostedt/linux-trace.git/commit/?id=5d4648a0415efc239ffb377bce1d389723eda25d git remote add trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git git fetch --no-tags trace ftrace/core git checkout 5d4648a0415efc239ffb377bce1d389723eda25d # 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 All warnings (new ones prefixed by >>): >> kernel/trace/trace_boot.c:420:4: warning: misleading indentation; statement is not part of the previous 'if' [-Wmisleading-indentation] if (trigger_process_regex(file, buf) < 0) ^ kernel/trace/trace_boot.c:418:3: note: previous statement is here if (trace_boot_compose_hist_cmd(hnode, buf, size) == 0) ^ 1 warning generated. vim +/if +420 kernel/trace/trace_boot.c 30cb856e3067e5 Masami Hiramatsu 2021-08-06 395 30cb856e3067e5 Masami Hiramatsu 2021-08-06 396 static void __init 30cb856e3067e5 Masami Hiramatsu 2021-08-06 397 trace_boot_init_histograms(struct trace_event_file *file, 30cb856e3067e5 Masami Hiramatsu 2021-08-06 398 struct xbc_node *hnode, char *buf, size_t size) 30cb856e3067e5 Masami Hiramatsu 2021-08-06 399 { 30cb856e3067e5 Masami Hiramatsu 2021-08-06 400 struct xbc_node *node; 30cb856e3067e5 Masami Hiramatsu 2021-08-06 401 const char *p; 5d4648a0415efc Masami Hiramatsu 2021-08-06 402 char *tmp; 30cb856e3067e5 Masami Hiramatsu 2021-08-06 403 30cb856e3067e5 Masami Hiramatsu 2021-08-06 404 xbc_node_for_each_subkey(hnode, node) { 30cb856e3067e5 Masami Hiramatsu 2021-08-06 405 p = xbc_node_get_data(node); 30cb856e3067e5 Masami Hiramatsu 2021-08-06 406 if (!isdigit(p[0])) 30cb856e3067e5 Masami Hiramatsu 2021-08-06 407 continue; 30cb856e3067e5 Masami Hiramatsu 2021-08-06 408 /* All digit started node should be instances. */ 30cb856e3067e5 Masami Hiramatsu 2021-08-06 409 if (trace_boot_compose_hist_cmd(node, buf, size) == 0) { 5d4648a0415efc Masami Hiramatsu 2021-08-06 410 tmp = kstrdup(buf, GFP_KERNEL); 30cb856e3067e5 Masami Hiramatsu 2021-08-06 411 if (trigger_process_regex(file, buf) < 0) 5d4648a0415efc Masami Hiramatsu 2021-08-06 412 pr_err("Failed to apply hist trigger: %s\n", tmp); 5d4648a0415efc Masami Hiramatsu 2021-08-06 413 kfree(tmp); 30cb856e3067e5 Masami Hiramatsu 2021-08-06 414 } 30cb856e3067e5 Masami Hiramatsu 2021-08-06 415 } 30cb856e3067e5 Masami Hiramatsu 2021-08-06 416 30cb856e3067e5 Masami Hiramatsu 2021-08-06 417 if (xbc_node_find_child(hnode, "keys")) { 30cb856e3067e5 Masami Hiramatsu 2021-08-06 418 if (trace_boot_compose_hist_cmd(hnode, buf, size) == 0) 5d4648a0415efc Masami Hiramatsu 2021-08-06 419 tmp = kstrdup(buf, GFP_KERNEL); 30cb856e3067e5 Masami Hiramatsu 2021-08-06 @420 if (trigger_process_regex(file, buf) < 0) 5d4648a0415efc Masami Hiramatsu 2021-08-06 421 pr_err("Failed to apply hist trigger: %s\n", tmp); 5d4648a0415efc Masami Hiramatsu 2021-08-06 422 kfree(tmp); 30cb856e3067e5 Masami Hiramatsu 2021-08-06 423 } 30cb856e3067e5 Masami Hiramatsu 2021-08-06 424 :::::: The code at line 420 was first introduced by commit :::::: 30cb856e3067e5d6ae7b2144e1659145ab7686fd tracing/boot: Support multiple histograms for each event :::::: TO: Masami Hiramatsu :::::: CC: Steven Rostedt (VMware) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org