The following kernel calls are listed as undocumented in the
"man" pages or elsewhere.  Some are used by libraries but it
is best to avoid these calls.

TOPIC   #  NAME           DESCRIPTION
-----  --- ------------   ------------------------------------------------
undoc  137 afs_syscall        - UNIMPLEMENTED
undoc   17 break              - UNIMPLEMENTED
undoc  212 chown32            - see chown
undoc  266 clock_getres       - get clock precision 
undoc  265 clock_gettime      - get specified time
undoc  267 clock_nanosleep    - process sleep
undoc  264 clock_settime      - set specified time
undoc  254 epoll_create       - open an epoll file descriptor
undoc  255 epoll_ctl          - control interface for an epoll descriptor
undoc  256 epoll_wait         - wait for an I/O event on an epoll file descriptor
undoc  252 exit_group         - exit all process's in group
undoc  250 fadvise64          - 
undoc  272 fadvise64_64       - 
undoc  207 fchown32           - see chown
undoc  221 fcntl64            - 
undoc  231 fgetxattr          - get extended attribute
undoc  234 flistxattr         - list extended attribute
undoc  237 fremovexattr       - remove extended attribute
undoc  228 fsetxattr          - set extended attribute
undoc  197 fstat64            - 
undoc  269 fstatfs64          - 
undoc   35 ftime              - UNIMPLEMENTED return date and time
undoc  194 ftruncate64        - 
undoc  240 futex              - Fast Userspace Locking system call
undoc  220 getdents64         - 
undoc  202 getegid32          - see getegid
undoc  201 geteuid32          - see geteuid
undoc  200 getgid32           - see getgid
undoc  205 getgroups32        - see getgroups
undoc  275 get_mempolicy      - 
undoc  211 getresgid32        - 
undoc  209 getresuid32        - 
undoc  244 get_thread_area    - Get a Thread Local Storage (TLS) area 
undoc  224 gettid             - get thread identification
undoc  199 getuid32           - see getuid
undoc  229 getxattr           - retrieve an extended attribute value
undoc   32 gtty               - UNIMPLEMENTED
undoc  249 io_cancel          - Cancel an outstanding asynchronous I/O operation
undoc  246 io_destroy         - Destroy an asynchronous I/O context 
undoc  247 io_getevents       - Read asynchronous I/O events from completion queue
undoc  245 io_setup           - io_setup   - Create an asynchronous I/O context
undoc  248 io_submit          - Submit asynchronous I/O blocks for processing
undoc  198 lchown32           - see lchown
undoc  230 lgetxattr          - get extended attribute
undoc  232 listxattr          - list extended attribute names
undoc  233 llistxattr         - list extended attributes
undoc   53 lock               - UNIMPLEMENTED
undoc  253 lookup_dcookie     - return a directory entry's path
undoc  236 lremovexattr       - remove extended attributes
undoc  227 lsetxattr          - set extended attributes
undoc  196 lstat64            - 
undoc  219 madvise            - give advice about use of memory
undoc  219 madvise1           - 
undoc  274 mbind              - 
undoc  218 mincore            - get information on whether pages are in core 
undoc  192 mmap2              - map files or devices into memory
undoc   56 mpx                - UNIMPLEMENTED
undoc  282 mq_getsetattr      - 
undoc  281 mq_notify          - 
undoc  277 mq_open            - 
undoc  280 mq_timedreceive    - 
undoc  279 mq_timedsend       - 
undoc  278 mq_unlink          - 
undoc   28 oldfstat           - obsolete DO NOT USE
undoc   84 oldlstat           - obsolete
undoc   59 oldolduname        - obsolete
undoc   18 oldstat            - obsolete
undoc  109 olduname           - obsolete
undoc  217 pivot_root         - change the root file system
undoc  180 pread64            - read/write without advancing file descriptor
undoc   44 prof               - UNIMPLEMENTED
undoc  189 putpmsg            - UNIMPLEMENTED
undoc  181 pwrite64           - write to file descriptor at offset
undoc  225 readahead          - Read in advance pages of a file
undoc  257 remap_file_pages   - create a non-linear file mapping
undoc  235 removexattr        - remove an extended attribute
undoc  223 rsbac              - 
undoc  242 sched_getaffinity  - 
undoc  239 sendfile64         - 
undoc  216 setfsgid32         - see setfsgid
undoc  215 setfsuid32         - see setfsuit
undoc  214 setgid32           - see setgid
undoc  206 setgroups32        - see setgroupd
undoc  276 set_mempolicy      - 
undoc  204 setregid32         - see setregid
undoc  210 setresgid32        - see setresgid
undoc  208 setresuid32        - see setresuid
undoc  203 setreuid32         - see setreuid
undoc  243 set_thread_area    - Set a Thread Local Storage (TLS) area
undoc  258 set_tid_address    - 
undoc  213 setuid32           - see setuid
undoc  226 setxattr           - set an extended attribute value
undoc  195 stat64             - 
undoc  268 statfs64           - 
undoc   31 stty               - UNIMPLEMENTED
undoc  135 sysfs              - get file system type information
undoc  283 sys_kexec_load     - 
undoc  270 tgkill             - 
undoc  259 timer_create       - 
undoc  263 timer_delete       - 
undoc  262 timer_getoverrun   - 
undoc  261 timer_gettime      - 
undoc  260 timer_settime      - 
undoc  238 tkill              - send a signal to a single process
undoc  193 truncate64         - 
undoc  191 ugetrlimit         - 
undoc  251 unknown            - 
undoc  271 utimes             - change access and/or modification times of an inodetimes    
undoc  273 vserver            - 
