Re: [PATCH 1/2] tracing: Remove "__attribute__()" from the type field of event format

[kernel test robot <lkp@intel.com>]

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Hi Masami,

kernel test robot noticed the following build errors:

[auto build test ERROR on trace/for-next]
[also build test ERROR on linus/master v6.16-rc5 next-20250708]
[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/Masami-Hiramatsu-Google/tracing-Remove-__attribute__-from-the-type-field-of-event-format/20250708-195600
base:   https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next
patch link:    https://lore.kernel.org/r/175197568917.977073.2201559708302320631.stgit%40mhiramat.tok.corp.google.com
patch subject: [PATCH 1/2] tracing: Remove "__attribute__()" from the type field of event format
:::::: branch date: 13 hours ago
:::::: commit date: 13 hours ago
config: arc-randconfig-001-20250709 (attached as .config)
compiler: arc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (attached as 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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507090856.swUa0d8T-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/trace/trace_events.c: In function 'sanitize_field_type':
>> kernel/trace/trace_events.c:120:30: error: initializer element is not constant
     static const int attr_len = strlen(ATTRIBUTE_STR);
                                 ^~~~~~


vim +120 kernel/trace/trace_events.c

c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  116) 
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  117) /* Remove all __attribute__() from type */
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  118) static void sanitize_field_type(char *type)
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  119) {
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08 @120) 	static const int attr_len = strlen(ATTRIBUTE_STR);
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  121) 	char *attr, *tmp, *next;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  122) 	int depth;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  123) 
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  124) 	next = type;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  125) 	while ((attr = strstr(next, ATTRIBUTE_STR))) {
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  126) 		next = attr + attr_len;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  127) 
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  128) 		/* Retry if __attribute__ is a part of type name. */
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  129) 		if ((attr != type && !isspace(attr[-1])) ||
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  130) 		    attr[attr_len] != '(')
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  131) 			continue;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  132) 
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  133) 		depth = 0;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  134) 		while ((tmp = strpbrk(next, "()"))) {
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  135) 			if (*tmp == '(')
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  136) 				depth++;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  137) 			else
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  138) 				depth--;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  139) 			next = tmp + 1;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  140) 			if (depth == 0)
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  141) 				break;
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  142) 		}
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  143) 		next = skip_spaces(next);
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  144) 		strcpy(attr, next);
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  145) 	}
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  146) }
c4415fcf8cbdb4 Masami Hiramatsu (Google  2025-07-08  147) 

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

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reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add trace https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
        git fetch trace for-next
        git checkout trace/for-next
        b4 shazam https://lore.kernel.org/r/175197568917.977073.2201559708302320631.stgit@mhiramat.tok.corp.google.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/iio/imu/inv_icm42600/ fs/ kernel/trace/