tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: ba07135cf74b1424e2f7f0c60e59c5b206ab320c commit: d83212d5dd6761625fe87cc23016bbaa47303271 [1743/1743] kallsyms, x86: Export addresses of PTI entry trampolines config: x86_64-buildonly-randconfig-2004-20250802 (https://download.01.org/0day-ci/archive/20250804/202508040829.QB64jfaH-lkp@i...) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250804/202508040829.QB64jfaH-lkp@i...) 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/202508040829.QB64jfaH-lkp@intel.com/ All warnings (new ones prefixed by >>):

...

arch/x86/mm/cpu_entry_area.c:155:5: warning: no previous prototype for 'arch_get_kallsym' [-Wmissing-prototypes] 155 | int arch_get_kallsym(unsigned int symnum, unsigned long *value, char *type, | ^~~~~~~~~~~~~~~~

vim +/arch_get_kallsym +155 arch/x86/mm/cpu_entry_area.c 153 154 #ifdef CONFIG_X86_64

155 int arch_get_kallsym(unsigned int symnum, unsigned long *value, char *type, 156 char *name) 157 { 158 unsigned int cpu, ncpu = 0; 159 160 if (symnum >= num_possible_cpus()) 161 return -EINVAL; 162 163 for_each_possible_cpu(cpu) { 164 if (ncpu++ >= symnum) 165 break; 166 } 167 168 *value = (unsigned long)&get_cpu_entry_area(cpu)->entry_trampoline; 169 *type = 't'; 170 strlcpy(name, "__entry_SYSCALL_64_trampoline", KSYM_NAME_LEN); 171 172 return 0; 173 } 174 #endif 175

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