Hi Fidal, kernel test robot noticed the following build errors: [auto build test ERROR on trace/for-next] [also build test ERROR on linus/master v6.17-rc4 next-20250905] [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/Fidal-Palamparambil/Fixed-the-build-warning-in-init_trace_printk_function_export/20250907-221041 base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next patch link: https://lore.kernel.org/r/20250907140755.529-1-rootuserhere%40gmail.com patch subject: [PATCH] Fixed the build warning in init_trace_printk_function_export(): config: x86_64-buildonly-randconfig-002-20250907 (https://download.01.org/0day-ci/archive/20250908/202509080203.SxCdQOOY-lkp@xxxxxxxxx/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250908/202509080203.SxCdQOOY-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202509080203.SxCdQOOY-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> kernel/trace/trace_printk.c:369:18: error: passing 'const struct file *' to parameter of type 'struct file *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers] 369 | return seq_open(file, &show_format_seq_ops); | ^~~~ include/linux/seq_file.h:108:27: note: passing argument to parameter here 108 | int seq_open(struct file *, const struct seq_operations *); | ^ >> kernel/trace/trace_printk.c:373:10: error: incompatible function pointer types initializing 'int (*)(struct inode *, struct file *)' with an expression of type 'int (struct inode *, const struct file *)' [-Wincompatible-function-pointer-types] 373 | .open = ftrace_formats_open, | ^~~~~~~~~~~~~~~~~~~ 2 errors generated. vim +369 kernel/trace/trace_printk.c 7975a2be16dd42 Steven Rostedt 2009-03-12 359 7975a2be16dd42 Steven Rostedt 2009-03-12 360 static int 66670b02cb828c Fidal palamparambil 2025-09-07 361 ftrace_formats_open(struct inode *inode, const struct file *file) 7975a2be16dd42 Steven Rostedt 2009-03-12 362 { 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 363) int ret; 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 364) 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 365) ret = security_locked_down(LOCKDOWN_TRACEFS); 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 366) if (ret) 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 367) return ret; 17911ff38aa58d Steven Rostedt (VMware 2019-10-11 368) c8961ec6da22ea Li Zefan 2009-06-24 @369 return seq_open(file, &show_format_seq_ops); 7975a2be16dd42 Steven Rostedt 2009-03-12 370 } 7975a2be16dd42 Steven Rostedt 2009-03-12 371 7975a2be16dd42 Steven Rostedt 2009-03-12 372 static const struct file_operations ftrace_formats_fops = { 7975a2be16dd42 Steven Rostedt 2009-03-12 @373 .open = ftrace_formats_open, 7975a2be16dd42 Steven Rostedt 2009-03-12 374 .read = seq_read, 7975a2be16dd42 Steven Rostedt 2009-03-12 375 .llseek = seq_lseek, 7975a2be16dd42 Steven Rostedt 2009-03-12 376 .release = seq_release, 7975a2be16dd42 Steven Rostedt 2009-03-12 377 }; 7975a2be16dd42 Steven Rostedt 2009-03-12 378 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
