Re: [PATCH 1/2] wifi: ath: Use static calibration variant table for devicetree platforms

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

Hi Manivannan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 3a8660878839faadb4f1a6dd72c3179c1df56787]

url:    https://github.com/intel-lab-lkp/linux/commits/Manivannan-Sadhasivam/wifi-ath-Use-static-calibration-variant-table-for-devicetree-platforms/20251114-183506
base:   3a8660878839faadb4f1a6dd72c3179c1df56787
patch link:    https://lore.kernel.org/r/20251114-ath-variant-tbl-v1-1-a9adfc49e3f3%40oss.qualcomm.com
patch subject: [PATCH 1/2] wifi: ath: Use static calibration variant table for devicetree platforms
config: x86_64-rhel-9.4-ltp (https://download.01.org/0day-ci/archive/20251115/202511151754.ggEBSIV4-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/20251115/202511151754.ggEBSIV4-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/202511151754.ggEBSIV4-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/wireless/ath/ath10k/core.h:26,
                    from drivers/net/wireless/ath/ath10k/core.c:21:
   In function 'ath_get_calib_variant',
       inlined from 'ath10k_core_check_dt' at drivers/net/wireless/ath/ath10k/core.c:1164:12:
>> drivers/net/wireless/ath/ath10k/../ath.h:431:36: warning: argument 2 null where non-null expected [-Wnonnull]
     431 |         while ((entry->machine) && strcmp(entry->machine, model))
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/bitmap.h:13,
                    from include/linux/cpumask.h:12,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/tsc.h:11,
                    from arch/x86/include/asm/timex.h:6,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from drivers/net/wireless/ath/ath10k/core.c:11:
   include/linux/string.h: In function 'ath10k_core_check_dt':
   include/linux/string.h:161:12: note: in a call to function 'strcmp' declared 'nonnull'
     161 | extern int strcmp(const char *,const char *);
         |            ^~~~~~
--
   In file included from drivers/net/wireless/ath/ath11k/core.c:23:
   In function 'ath_get_calib_variant',
       inlined from 'ath11k_core_check_dt' at drivers/net/wireless/ath/ath11k/core.c:1367:12:
>> drivers/net/wireless/ath/ath11k/../ath.h:431:36: warning: argument 2 null where non-null expected [-Wnonnull]
     431 |         while ((entry->machine) && strcmp(entry->machine, model))
         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/bitmap.h:13,
                    from include/linux/cpumask.h:12,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/tsc.h:11,
                    from arch/x86/include/asm/timex.h:6,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from drivers/net/wireless/ath/ath11k/core.c:9:
   include/linux/string.h: In function 'ath11k_core_check_dt':
   include/linux/string.h:161:12: note: in a call to function 'strcmp' declared 'nonnull'
     161 | extern int strcmp(const char *,const char *);
         |            ^~~~~~


vim +431 drivers/net/wireless/ath/ath10k/../ath.h

   424	
   425	static inline const char *ath_get_calib_variant(void)
   426	{
   427		const struct __ath_calib_variant_table *entry = ath_calib_variant_table;
   428		struct device_node *root __free(device_node) = of_find_node_by_path("/");
   429		const char *model = of_get_property(root, "model", NULL);
   430	
 > 431		while ((entry->machine) && strcmp(entry->machine, model))
   432			entry++;
   433	
   434		return entry->machine ? entry->variant : NULL;
   435	}
   436	

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