[openeuler:OLK-6.6 2976/2976] fs/nfs/enfs/pm_ping.c:196:6: warning: no previous prototype for function 'enfs_test_reconnect_time'

[openeuler:OLK-6.6 2976/2976] fs/nfs/enfs/pm_ping.c:196:6: warning: no previous prototype for function 'enfs_test_reconnect_time'

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   65461ffb14372269f333f0e18867775c14741e76
commit: 1c9eb515727c21c6c7b8212f40c006d656473bb6 [2976/2976] nfs/enfs: introduce reconnect time KUnit tests
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20251017/202510171010.KAuyBISF-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251017/202510171010.KAuyBISF-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/202510171010.KAuyBISF-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/nfs/enfs/pm_ping.c:196:6: warning: no previous prototype for function 'enfs_test_reconnect_time' [-Wmissing-prototypes]
     196 | bool enfs_test_reconnect_time(void)
         |      ^
   fs/nfs/enfs/pm_ping.c:196:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     196 | bool enfs_test_reconnect_time(void)
         | ^
         | static 
   1 warning generated.


vim +/enfs_test_reconnect_time +196 fs/nfs/enfs/pm_ping.c

   194	
   195	#if IS_ENABLED(CONFIG_ENFS_KUNIT_TEST)
 > 196	bool enfs_test_reconnect_time(void)
   197	{
   198		bool ret = true;
   199		bool match;
   200		s64 begin_ms = ktime_to_ms(ktime_get());
   201		s64 ms;
   202		unsigned int cookie = 1;
   203		struct enfs_reconnect_time time = {
   204			.head = 0,
   205			.tail = 0,
   206			.xprt_cookie = 0,
   207		};
   208	
   209		enfs_log_info("begin time: %lld ms\n", begin_ms);
   210	
   211		ms = begin_ms;
   212		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   213		enfs_update_reconnect_time(&time, ms, cookie);
   214		match = enfs_is_time_buf_empty(&time);
   215		if (!match)
   216			return false;
   217	
   218		ms = begin_ms + 1000;
   219		cookie += 1;
   220		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   221		enfs_update_reconnect_time(&time, ms, cookie);
   222		match = time.head == 1 && time.tail == 0;
   223		if (!match)
   224			return false;
   225	
   226		ms = begin_ms + 2000;
   227		cookie += 1;
   228		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   229		enfs_update_reconnect_time(&time, ms, cookie);
   230		match = time.head == 2 && time.tail == 0;
   231		if (!match)
   232			return false;
   233	
   234		ms = begin_ms + 3000;
   235		cookie += 1;
   236		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   237		enfs_update_reconnect_time(&time, ms, cookie);
   238		match = time.head == 3 && time.tail == 0;
   239		if (!match)
   240			return false;
   241	
   242		ms = begin_ms + 4000;
   243		cookie += 1;
   244		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   245		enfs_update_reconnect_time(&time, ms, cookie);
   246		match = time.head == 0 && time.tail == 1;
   247		if (!match)
   248			return false;
   249		match = enfs_is_time_buf_full(&time);
   250		if (!match)
   251			return false;
   252	
   253		ms = begin_ms + 5000;
   254		/* cookie remains unchanged */
   255		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   256		enfs_update_reconnect_time(&time, ms, cookie);
   257		match = time.head == 0 && time.tail == 1;
   258		if (!match)
   259			return false;
   260	
   261		ms = begin_ms + 5000 + ENFS_UNSTABLE_STATE_TIMEOUT * 1000 + 1;
   262		cookie += 1;
   263		enfs_log_info("%lld ms, cookie:%d\n", ms, cookie);
   264		enfs_update_reconnect_time(&time, ms, cookie);
   265		match = time.head == 1 && time.tail == 0;
   266		if (!match)
   267			return false;
   268	
   269		return ret;
   270	}
   271	#endif
   272	

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