[openeuler:OLK-6.6 1344/1344] drivers/crypto/ccp/hygon/tdm-kernel-guard.c:243:15: warning: no previous prototype for function 'kprobe_symbol_address_byname'

[openeuler:OLK-6.6 1344/1344] drivers/crypto/ccp/hygon/tdm-kernel-guard.c:243:15: warning: no previous prototype for function 'kprobe_symbol_address_byname'

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   4cd9ac5bb21892408b1fd5332f7fbea44a16b61e
commit: 3ad98583441f7c8a2553e1e8d6340ed4397033e2 [1344/1344] crypto: tdm: Support dynamic protection for SCT and IDT by HYGON TDM
config: x86_64-buildonly-randconfig-003-20241102 (https://download.01.org/0day-ci/archive/20241102/202411020918.At8pfay4-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241102/202411020918.At8pfay4-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/202411020918.At8pfay4-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/crypto/ccp/hygon/tdm-kernel-guard.c:15:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2242:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   drivers/crypto/ccp/hygon/tdm-kernel-guard.c:151:5: warning: no previous prototype for function 'tdm_service_run' [-Wmissing-prototypes]
     151 | int tdm_service_run(struct tdm_security_enhance *data)
         |     ^
   drivers/crypto/ccp/hygon/tdm-kernel-guard.c:151:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     151 | int tdm_service_run(struct tdm_security_enhance *data)
         | ^
         | static 
   drivers/crypto/ccp/hygon/tdm-kernel-guard.c:212:5: warning: no previous prototype for function 'tdm_service_exit' [-Wmissing-prototypes]
     212 | int tdm_service_exit(struct tdm_security_enhance *data)
         |     ^
   drivers/crypto/ccp/hygon/tdm-kernel-guard.c:212:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     212 | int tdm_service_exit(struct tdm_security_enhance *data)
         | ^
         | static 
>> drivers/crypto/ccp/hygon/tdm-kernel-guard.c:243:15: warning: no previous prototype for function 'kprobe_symbol_address_byname' [-Wmissing-prototypes]
     243 | unsigned long kprobe_symbol_address_byname(const char *name)
         |               ^
   drivers/crypto/ccp/hygon/tdm-kernel-guard.c:243:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     243 | unsigned long kprobe_symbol_address_byname(const char *name)
         | ^
         | static 
   4 warnings generated.


vim +/kprobe_symbol_address_byname +243 drivers/crypto/ccp/hygon/tdm-kernel-guard.c

   211	
 > 212	int tdm_service_exit(struct tdm_security_enhance *data)
   213	{
   214		int ret = 0;
   215		int task_status = 0;
   216	
   217		task_status = psp_startstop_measure_task(data->task_id, data->authcode, false);
   218		if (task_status < 0) {
   219			ret = task_status;
   220			pr_err("task_id %d stop failed with 0x%x\n", data->task_id, ret);
   221			goto end;
   222		}
   223	
   224		// Waiting for the task to end
   225		msleep(40);
   226	
   227		psp_destroy_measure_task(data->task_id, data->authcode);
   228	
   229		kfree(data->authcode);
   230		data->authcode = NULL;
   231		kfree(data->mem_range);
   232		data->mem_range = NULL;
   233	end:
   234		return ret;
   235	}
   236	
   237	#if !IS_BUILTIN(CONFIG_TDM_KERNEL_GUARD)
   238	static int p_tmp_kprobe_handler(struct kprobe *p_ri, struct pt_regs *p_regs)
   239	{
   240		return 0;
   241	}
   242	
 > 243	unsigned long kprobe_symbol_address_byname(const char *name)
   244	{
   245		int p_ret;
   246		struct kprobe p_kprobe;
   247		unsigned long addr = 0;
   248	
   249		memset(&p_kprobe, 0, sizeof(p_kprobe));
   250	
   251		p_kprobe.pre_handler = p_tmp_kprobe_handler;
   252		p_kprobe.symbol_name = name;
   253	
   254		p_ret = register_kprobe(&p_kprobe);
   255		if (p_ret < 0) {
   256			pr_err("register_kprobe error [%d] :(\n", p_ret);
   257			return 0;
   258		}
   259	
   260		addr = (unsigned long)p_kprobe.addr;
   261		unregister_kprobe(&p_kprobe);
   262	
   263		return addr;
   264	}
   265	#endif
   266	

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