[jimc:jump-batch-260903 51/56] lib/dynamic_debug.c:793:1: warning: the frame size of 1296 bytes is larger than 1280 bytes

[jimc:jump-batch-260903 51/56] lib/dynamic_debug.c:793:1: warning: the frame size of 1296 bytes is larger than 1280 bytes

[kernel test robot]

tree:   https://github.com/jimc/linux.git jump-batch-260903
head:   c2b43d468878ecfd9647a8eea621ceda5d1cd208
commit: ac471b8cc89b36ddb96940b2bd214217c4bab1fe [51/56] x86/alternative, jump_label, dyndbg: fix early boot crashes and locking in jump-batch-core-1
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20260906/202609062305.5uATbcF2-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260906/202609062305.5uATbcF2-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609062305.5uATbcF2-lkp@intel.com/

All warnings (new ones prefixed by >>):

   lib/dynamic_debug.c: In function 'ddebug_apply_class_bitmap':
>> lib/dynamic_debug.c:793:1: warning: the frame size of 1296 bytes is larger than 1280 bytes [-Wframe-larger-than=]
     793 | }
         | ^


vim +793 lib/dynamic_debug.c

a2d375eda771a6 Jim Cromie 2020-08-31  744  
0a63a411361860 Jim Cromie 2025-11-18  745  /* apply a new class-param setting */
b9400852c0801a Jim Cromie 2022-09-04  746  static int ddebug_apply_class_bitmap(const struct ddebug_class_param *dcp,
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  747  				     const u32 *new_bits, const u32 old_bits,
0a63a411361860 Jim Cromie 2025-11-18  748  				     const char *query_modname)
b9400852c0801a Jim Cromie 2022-09-04  749  {
b9400852c0801a Jim Cromie 2022-09-04  750  	const struct ddebug_class_map *map = dcp->map;
b9400852c0801a Jim Cromie 2022-09-04  751  	int matches = 0;
398a544c6030fa Jim Cromie 2026-03-08  752  	int bi, pos = 0;
ac471b8cc89b36 Jim Cromie 2026-08-08  753  	bool alloc = true;
ac471b8cc89b36 Jim Cromie 2026-08-08  754  	char sbuf[1024];
398a544c6030fa Jim Cromie 2026-03-08  755  	char *buf;
398a544c6030fa Jim Cromie 2026-03-08  756  
398a544c6030fa Jim Cromie 2026-03-08  757  	if (*new_bits == old_bits)
398a544c6030fa Jim Cromie 2026-03-08  758  		return 0;
b9400852c0801a Jim Cromie 2022-09-04  759  
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  760  	v2pr_info("apply bitmap: 0x%x to: 0x%x for %s\n", *new_bits,
28d2dd8233aa44 Jim Cromie 2025-11-18  761  		  old_bits, query_modname ?: "'*'");
b9400852c0801a Jim Cromie 2022-09-04  762  
ac471b8cc89b36 Jim Cromie 2026-08-08  763  	buf = kmalloc(1024, GFP_KERNEL);
ac471b8cc89b36 Jim Cromie 2026-08-08  764  	if (!buf) {
ac471b8cc89b36 Jim Cromie 2026-08-08  765  		buf = sbuf;
ac471b8cc89b36 Jim Cromie 2026-08-08  766  		alloc = false;
ac471b8cc89b36 Jim Cromie 2026-08-08  767  	}
398a544c6030fa Jim Cromie 2026-03-08  768  
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  769  	for (bi = 0; bi < map->length && bi < 32; bi++) {
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  770  		bool new_b = !!(*new_bits & BIT(bi));
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  771  		bool old_b = !!(old_bits & BIT(bi));
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  772  
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  773  		if (new_b == old_b)
b9400852c0801a Jim Cromie 2022-09-04  774  			continue;
b9400852c0801a Jim Cromie 2022-09-04  775  
ac471b8cc89b36 Jim Cromie 2026-08-08  776  		pos += scnprintf(buf + pos, (alloc ? 1024 : sizeof(sbuf)) - pos, "class %s %c%s%c",
398a544c6030fa Jim Cromie 2026-03-08  777  				 map->class_names[bi],
398a544c6030fa Jim Cromie 2026-03-08  778  				 new_b ? '+' : '-', dcp->flags, ';');
398a544c6030fa Jim Cromie 2026-03-08  779  	}
b9400852c0801a Jim Cromie 2022-09-04  780  
398a544c6030fa Jim Cromie 2026-03-08  781  	if (pos) {
398a544c6030fa Jim Cromie 2026-03-08  782  		buf[pos - 1] = '\0'; /* trim last ';' */
398a544c6030fa Jim Cromie 2026-03-08  783  		matches = ddebug_exec_queries(buf, query_modname);
b9400852c0801a Jim Cromie 2022-09-04  784  	}
398a544c6030fa Jim Cromie 2026-03-08  785  
ac471b8cc89b36 Jim Cromie 2026-08-08  786  	if (alloc)
398a544c6030fa Jim Cromie 2026-03-08  787  		kfree(buf);
398a544c6030fa Jim Cromie 2026-03-08  788  
1ec0f7ef1e9ab3 Jim Cromie 2025-11-18  789  	v2pr_info("applied bitmap: 0x%x to: 0x%x for %s\n", *new_bits,
28d2dd8233aa44 Jim Cromie 2025-11-18  790  		  old_bits, query_modname ?: "'*'");
0a63a411361860 Jim Cromie 2025-11-18  791  
b9400852c0801a Jim Cromie 2022-09-04  792  	return matches;
b9400852c0801a Jim Cromie 2022-09-04 @793  }
b9400852c0801a Jim Cromie 2022-09-04  794  

:::::: The code at line 793 was first introduced by commit
:::::: b9400852c0801aebee4fc8b62e6b7cc69c7fcbda dyndbg: add drm.debug style (drm/parameters/debug) bitmap support

:::::: TO: Jim Cromie <jim.cromie@gmail.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

--
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https://github.com/intel/lkp-tests/wiki