__sys_setreuid    555 kernel/sys.c   	return __sys_setreuid(ruid, euid);
__sys_setreuid     50 kernel/uid16.c 	return __sys_setreuid(low2highuid(ruid), low2highuid(euid));
__sys_setreuid      7 kernel/uid16.h long __sys_setreuid(uid_t ruid, uid_t euid);