tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 95bc69473a373c2e578d4fc39734e5811a03ead3 commit: 5c3cf22892983304b18d87296ed96ff0ab7d6c95 [1559/1559] arm64: Introduce xcall a faster svc exception handling config: arm64-randconfig-004-20241129 (https://download.01.org/0day-ci/archive/20241129/202411290709.0jx9FZzQ-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241129/202411290709.0jx9FZzQ-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/202411290709.0jx9FZzQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

...

arch/arm64/kernel/cpufeature.c:2387:6: warning: no previous prototype for 'fast_syscall_enabled' [-Wmissing-prototypes]

2387 | bool fast_syscall_enabled(void) | ^~~~~~~~~~~~~~~~~~~~

vim +/fast_syscall_enabled +2387 arch/arm64/kernel/cpufeature.c

2386

2387 bool fast_syscall_enabled(void)

2388 { 2389 return is_xcall_support; 2390 } 2391