tree:   https://github.com/zen-kernel/zen-kernel 5.10/futex2
head:   65d8ec592b14a8c75ce2a04bfef5a188cd279d00
commit: 65d8ec592b14a8c75ce2a04bfef5a188cd279d00 [13/13] futex2: Add sysfs entry for syscall numbers
config: alpha-randconfig-r014-20210218 (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/zen-kernel/zen-kernel/commit/65d8ec592b14a8c75ce2a04bfef5a188cd279d00
        git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen-kernel-zen-kernel 5.10/futex2
        git checkout 65d8ec592b14a8c75ce2a04bfef5a188cd279d00
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   kernel/futex2.c: In function 'wait_show':
>> kernel/futex2.c:1226:30: error: '__NR_futex_wait' undeclared (first use in this function); did you mean '__futex_wait'?
    1226 |  return sprintf(buf, "%u\n", __NR_futex_wait);
         |                              ^~~~~~~~~~~~~~~
         |                              __futex_wait
   kernel/futex2.c:1226:30: note: each undeclared identifier is reported only once for each function it appears in
   kernel/futex2.c: In function 'wake_show':
>> kernel/futex2.c:1234:30: error: '__NR_futex_wake' undeclared (first use in this function); did you mean 'sys_futex_wake'?
    1234 |  return sprintf(buf, "%u\n", __NR_futex_wake);
         |                              ^~~~~~~~~~~~~~~
         |                              sys_futex_wake
   kernel/futex2.c: In function 'waitv_show':
>> kernel/futex2.c:1242:30: error: '__NR_futex_waitv' undeclared (first use in this function); did you mean '__futex_wait'?
    1242 |  return sprintf(buf, "%u\n", __NR_futex_waitv);
         |                              ^~~~~~~~~~~~~~~~
         |                              __futex_wait
   kernel/futex2.c:1244:1: error: control reaches end of non-void function [-Werror=return-type]
    1244 | }
         | ^
   kernel/futex2.c: In function 'wake_show':
   kernel/futex2.c:1236:1: error: control reaches end of non-void function [-Werror=return-type]
    1236 | }
         | ^
   kernel/futex2.c: In function 'wait_show':
   kernel/futex2.c:1228:1: error: control reaches end of non-void function [-Werror=return-type]
    1228 | }
         | ^
   cc1: some warnings being treated as errors


vim +1226 kernel/futex2.c

  1222	
  1223	static ssize_t wait_show(struct kobject *kobj, struct kobj_attribute *attr,
  1224				     char *buf)
  1225	{
> 1226		return sprintf(buf, "%u\n", __NR_futex_wait);
  1227	
  1228	}
  1229	static struct kobj_attribute futex2_wait_attr = __ATTR_RO(wait);
  1230	
  1231	static ssize_t wake_show(struct kobject *kobj, struct kobj_attribute *attr,
  1232				     char *buf)
  1233	{
> 1234		return sprintf(buf, "%u\n", __NR_futex_wake);
  1235	
  1236	}
  1237	static struct kobj_attribute futex2_wake_attr = __ATTR_RO(wake);
  1238	
  1239	static ssize_t waitv_show(struct kobject *kobj, struct kobj_attribute *attr,
  1240				     char *buf)
  1241	{
> 1242		return sprintf(buf, "%u\n", __NR_futex_waitv);
  1243	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org