Re: [PATCH v4 6/6] x86/CPU/AMD: Print AGESA string from DMI additional information entry

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

Hi Mario,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/x86/core]
[also build test WARNING on tip/master linus/master v6.19-rc6 next-20260120]
[cannot apply to jdelvare-staging/dmi-for-next bp/for-next tip/auto-latest]
[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/Mario-Limonciello-AMD/firmware-dmi-Correct-an-indexing-error-in-dmi-h/20260121-140800
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/20260121060431.432350-7-superm1%40kernel.org
patch subject: [PATCH v4 6/6] x86/CPU/AMD: Print AGESA string from DMI additional information entry
config: i386-buildonly-randconfig-003-20260121 (https://download.01.org/0day-ci/archive/20260122/202601220139.ymxKIu3a-lkp@intel.com/config)
compiler: gcc-13 (Debian 13.3.0-16) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601220139.ymxKIu3a-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/202601220139.ymxKIu3a-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/x86/kernel/cpu/amd.c:6:
   include/linux/dmi.h: In function 'dmi_string_nosave':
   include/linux/dmi.h:173:71: error: 'dmi_empty_string' undeclared (first use in this function)
     173 |         dmi_string_nosave(const struct dmi_header *dm, u8 s) { return dmi_empty_string; }
         |                                                                       ^~~~~~~~~~~~~~~~
   include/linux/dmi.h:173:71: note: each undeclared identifier is reported only once for each function it appears in
>> include/linux/dmi.h:173:89: warning: control reaches end of non-void function [-Wreturn-type]
     173 |         dmi_string_nosave(const struct dmi_header *dm, u8 s) { return dmi_empty_string; }
         |                                                                                         ^


vim +173 include/linux/dmi.h

   141	
   142	static inline int dmi_check_system(const struct dmi_system_id *list) { return 0; }
   143	static inline const char * dmi_get_system_info(int field) { return NULL; }
   144	static inline const struct dmi_device * dmi_find_device(int type, const char *name,
   145		const struct dmi_device *from) { return NULL; }
   146	static inline void dmi_setup(void) { }
   147	static inline bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
   148	{
   149		if (yearp)
   150			*yearp = 0;
   151		if (monthp)
   152			*monthp = 0;
   153		if (dayp)
   154			*dayp = 0;
   155		return false;
   156	}
   157	static inline int dmi_get_bios_year(void) { return -ENXIO; }
   158	static inline int dmi_name_in_vendors(const char *s) { return 0; }
   159	static inline int dmi_name_in_serial(const char *s) { return 0; }
   160	#define dmi_available 0
   161	static inline int dmi_walk(void (*decode)(const struct dmi_header *, void *),
   162		void *private_data) { return -ENXIO; }
   163	static inline bool dmi_match(enum dmi_field f, const char *str)
   164		{ return false; }
   165	static inline void dmi_memdev_name(u16 handle, const char **bank,
   166			const char **device) { }
   167	static inline u64 dmi_memdev_size(u16 handle) { return ~0ul; }
   168	static inline u8 dmi_memdev_type(u16 handle) { return 0x0; }
   169	static inline u16 dmi_memdev_handle(int slot) { return 0xffff; }
   170	static inline const struct dmi_system_id *
   171		dmi_first_match(const struct dmi_system_id *list) { return NULL; }
   172	static inline const char *
 > 173		dmi_string_nosave(const struct dmi_header *dm, u8 s) { return dmi_empty_string; }
   174	

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