tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git since-4.2
head:   62799b075621cec2d2a777837187a2885ccd977e
commit: ad2ff3822c558e410ca3f4bd6ed9f0ea18c59e58 [242/301] mm: mlock: add new mlock system call
config: openrisc-or1ksim_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout ad2ff3822c558e410ca3f4bd6ed9f0ea18c59e58
  # save the attached .config to linux build tree
  make.cross ARCH=openrisc 

All error/warnings (new ones prefixed by >>):

   In file included from include/asm-generic/unistd.h:1:0,
                    from arch/openrisc/include/uapi/asm/unistd.h:26,
                    from arch/openrisc/kernel/sys_call_table.c:27:
>> include/uapi/asm-generic/unistd.h:713:1: error: array index in initializer exceeds array bounds
   include/uapi/asm-generic/unistd.h:713:1: error: (near initialization for 'sys_call_table')

vim +713 include/uapi/asm-generic/unistd.h

   707	__SYSCALL(__NR_memfd_create, sys_memfd_create)
   708	#define __NR_bpf 280
   709	__SYSCALL(__NR_bpf, sys_bpf)
   710	#define __NR_execveat 281
   711	__SC_COMP(__NR_execveat, sys_execveat, compat_sys_execveat)
   712	#define __NR_mlock2 283
 > 713	__SYSCALL(__NR_mlock2, sys_mlock2)
   714	
   715	#undef __NR_syscalls
   716	#define __NR_syscalls 283

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