Hi Arnd, kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20260130] [cannot apply to trace/for-next linus/master v6.19-rc8 v6.19-rc7 v6.19-rc6 v6.19-rc8] [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/Arnd-Bergmann/tracing-remove-__printf-attribute-on-__ftrace_vbprintk/20260202-180958 base: next-20260130 patch link: https://lore.kernel.org/r/20260202095834.1328352-1-arnd%40kernel.org patch subject: [PATCH] tracing: remove __printf() attribute on __ftrace_vbprintk() config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20260203/[email protected]/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260203/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> kernel/trace/trace_printk.c:212:34: warning: diagnostic behavior may be >> improved by adding the 'format(printf, 2, 3)' attribute to the declaration >> of '__trace_bprintk' [-Wmissing-format-attribute] 212 | ret = trace_vbprintk(ip, fmt, ap); | ^ include/linux/trace_printk.h:110:5: note: '__trace_bprintk' declared here 110 | int __trace_bprintk(unsigned long ip, const char *fmt, ...); | ^ 1 warning generated. vim +212 kernel/trace/trace_printk.c 1ba28e02a18cbd kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 199 48ead02030f849 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-12 200 int __trace_bprintk(unsigned long ip, const char *fmt, ...) 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 201 { 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 202 int ret; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 203 va_list ap; 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 204 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 205 if (unlikely(!fmt)) 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 206 return 0; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 207 b9f9108cad3998 kernel/trace/trace_printk.c Steven Rostedt (Red Hat 2015-09-29 208) if (!trace_printk_enabled) 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 209 return 0; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 210 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 211 va_start(ap, fmt); 40ce74f19c2807 kernel/trace/trace_printk.c Steven Rostedt 2009-03-19 @212 ret = trace_vbprintk(ip, fmt, ap); 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 213 va_end(ap); 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 214 return ret; 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 215 } 48ead02030f849 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-12 216 EXPORT_SYMBOL_GPL(__trace_bprintk); 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 217 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
