[dwmw2:hardpps-filter-p3-wip 7/8] kernel/time/ntp.c:175:2: error: call to undeclared function 'pps_fit_reset'; ISO C99 and later do not support implicit function declarations

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

tree:   git://git.infradead.org/users/dwmw2/linux hardpps-filter-p3-wip
head:   24b5bb6499c7dcc715bf50f768bc24b50f9cc631
commit: f04f156f18471fef43c99e5ef017165b43f34e7a [7/8] ntp: Estimate PPS frequency by least-squares fit over the interval
config: x86_64-buildonly-randconfig-1004-20261005 (https://download.01.org/0day-ci/archive/20261005/202610051707.7zfdNyut-lkp@intel.com/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261005/202610051707.7zfdNyut-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/202610051707.7zfdNyut-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/time/ntp.c:175:2: error: call to undeclared function 'pps_fit_reset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     175 |         pps_fit_reset(ntpdata);
         |         ^
>> kernel/time/ntp.c:1244:13: error: conflicting types for 'pps_fit_reset'
    1244 | static void pps_fit_reset(struct ntp_data *ntpdata)
         |             ^
   kernel/time/ntp.c:175:2: note: previous implicit declaration is here
     175 |         pps_fit_reset(ntpdata);
         |         ^
   2 errors generated.


vim +/pps_fit_reset +175 kernel/time/ntp.c

   162	
   163	/**
   164	 * pps_clear - Clears the PPS state variables
   165	 * @ntpdata:	Pointer to ntp data
   166	 */
   167	static inline void pps_clear(struct ntp_data *ntpdata)
   168	{
   169		pps_reset_freq_interval(ntpdata);
   170		ntpdata->pps_tf[0] = 0;
   171		ntpdata->pps_tf[1] = 0;
   172		ntpdata->pps_tf[2] = 0;
   173		ntpdata->pps_fbase.tv_sec = ntpdata->pps_fbase.tv_nsec = 0;
   174		ntpdata->pps_rawring_n = 0;
 > 175		pps_fit_reset(ntpdata);
   176		ntpdata->pps_freq = 0;
   177	}
   178	

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