[PATCH v8 4/4] kunit: Add documentation for warning backtrace suppression API

[kernel test robot]

Hi Alessandro,

kernel test robot noticed the following build errors:

[auto build test ERROR on 80234b5ab240f52fa45d201e899e207b9265ef91]

url:    https://github.com/intel-lab-lkp/linux/commits/Albert-Esteve/bug-kunit-Core-support-for-suppressing-warning-backtraces/20260513-043807
base:   80234b5ab240f52fa45d201e899e207b9265ef91
patch link:    https://lore.kernel.org/r/20260504-kunit_add_support-v8-4-3e5957cdd235%40redhat.com
patch subject: [PATCH v8 4/4] kunit: Add documentation for warning backtrace suppression API
config: x86_64-rhel-9.4-ltp (https://download.01.org/0day-ci/archive/20260513/202605130826.e6Lyyytr-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260513/202605130826.e6Lyyytr-lkp@intel.com/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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605130826.e6Lyyytr-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/drm_buddy.c:6:
>> include/kunit/test-bug.h:90:15: error: unknown type name 'bool'
      90 | static inline bool kunit_is_suppressed_warning(bool count) { return false; }
         |               ^~~~
   include/kunit/test-bug.h:13:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
      12 | #include <linux/stddef.h> /* for NULL */
     +++ |+#include <stdbool.h>
      13 | 
   include/kunit/test-bug.h:90:48: error: unknown type name 'bool'
      90 | static inline bool kunit_is_suppressed_warning(bool count) { return false; }
         |                                                ^~~~
   include/kunit/test-bug.h:90:48: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'


vim +/bool +90 include/kunit/test-bug.h

    88	
    89	static inline struct kunit *kunit_get_current_test(void) { return NULL; }
  > 90	static inline bool kunit_is_suppressed_warning(bool count) { return false; }
    91	

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