1 # $FreeBSD: src/sys/conf/options,v 1.191.2.53 2003/06/04 17:56:58 sam Exp $
3 # On the handling of kernel options
5 # All kernel options should be listed in LINT, with suitable
6 # descriptions. Negative options (options that make some code not
7 # compile) should be commented out; LINT should compile as much code
8 # as possible. Try to structure option-using code so that a single
9 # option only switch code on, or only switch code off, to make it
10 # possible to have a full compile-test. If necessary, you can include
11 # "opt_lint.h" and check for COMPILING_LINT to get maximum code
14 # All new options shall also be listed in either "conf/options" or
15 # "platform/<platform>/conf/options". Options that affect a single
16 # source-file <xxx>.[c|s] should be directed into "opt_<xxx>.h", while
17 # options that affect multiple files should either go in
18 # "opt_global.h" if this is a kernel-wide option (used just about
19 # everywhere), or in "opt_<option-name-in-lower-case>.h" if it affect
20 # only some files. Note that the effect of listing only an option
21 # without a header-file-name in conf/options (and cousins) is that the
22 # last convention is followed.
24 # This handling scheme is not yet fully implemented.
27 # Format of this file:
28 # Option name filename
30 # If filename is missing, the default is
31 # opt_<name-of-option-in-lower-case>.h
33 # Adaptec Array Controller driver options
36 # Adaptec aic7xxx SCSI controller options
37 AHC_ALLOW_MEMIO opt_aic7xxx.h # Allow PCI devices to use memory
40 AHC_TMODE_ENABLE opt_aic7xxx.h # Bitmap of units to enable
41 # targetmode operations.
43 AHC_DUMP_EEPROM opt_aic7xxx.h # Dump the contents of our
46 AHC_DEBUG opt_aic7xxx.h # Compile in Aic7xxx Debugging code.
48 AHC_DEBUG_OPTS opt_aic7xxx.h # Aic7xxx driver debugging options.
49 # See sys/dev/aic7xxx/aic7xxx.h
51 AHC_REG_PRETTY_PRINT opt_aic7xxx.h # Print register bitfields in debug
52 # output. Adds ~15k to driver.
54 # Adaptec aic79xx SCSI controller options
55 AHD_DEBUG opt_aic79xx.h # Compile in Aic79xx Debugging code.
57 AHD_DEBUG_OPTS opt_aic79xx.h # Aic79xx driver debugging options.
58 # See sys/dev/aic7xxx/aic79xx.h
60 AHD_TMODE_ENABLE opt_aic79xx.h # Bitmap of units to enable
61 # targetmode operations.
63 AHD_REG_PRETTY_PRINT opt_aic79xx.h # Print register bitfields in debug
64 # output. Adds ~15k to driver.
66 ADW_ALLOW_MEMIO opt_adw.h # Allow PCI devices to use memory
71 #options for ACPI support
73 ACPI_NO_SEMAPHORES opt_acpi.h
74 ACPI_ENABLE_PCI opt_acpi.h
76 # Miscellaneous options.
77 COMPAT_43 opt_compat.h
78 COMPAT_SUNOS opt_compat.h
79 COMPILING_LINT opt_lint.h
82 DDB_UNATTENDED opt_ddb.h
83 GDB_REMOTE_CHAT opt_ddb.h
116 DIRECTIO opt_directio.h
118 # POSIX kernel options
120 _KPOSIX_PRIORITY_SCHEDULING opt_posix.h
121 _KPOSIX_VERSION opt_posix.h
123 # Do we want the config file compiled into the kernel?
124 INCLUDE_CONFIG_FILE opt_config.h
126 # Options for static file systems. These should only be used at config
127 # time, since the corresponding lkms cannot work if there are any static
128 # dependencies. Unusability is enforced by hiding the defines for the
129 # options in a never-included header.
135 MSDOSFS opt_dontuse.h
146 # These static filesystems has one slightly bogus static dependency in
147 # sys/platform/.../i386/autoconf.c. If any of these filesystems are
148 # statically compiled into the kernel, code for mounting them as root
149 # filesystems will be enabled - but look below. Boot-code is purposely
150 # unavailable for the LKM-based versions.
155 # filesystems and libiconv bridge
156 CD9660_ICONV opt_dontuse.h
157 MSDOSFS_ICONV opt_dontuse.h
158 NTFS_ICONV opt_dontuse.h
162 NETSMBCRYPTO opt_netsmb.h
164 # If you are following the conditions in the copyright,
165 # you can enable soft-updates which will speed up a lot of things
166 # and make the system safer from crashes at the same time.
167 # otherwise a STUB module will be compiled in.
168 SOFTUPDATES opt_ffs.h
170 # Enable fast hash lookups for large directories on UFS-based filesystems.
171 UFS_DIRHASH opt_ufs.h
173 # The above static dependencies are planned removed, with a
174 # <filesystem>_ROOT option to control if it usable as root. This list
175 # allows these options to be present in config files already (though
176 # they won't make any difference yet).
178 NFS_ROOT opt_nfsroot.h
180 # The union static file system has bogus static dependencies, so it isn't
184 # Options used only in subr_param.c.
188 NMBCLUSTERS opt_param.h
190 VM_BCACHE_SIZE_MAX opt_param.h
191 VM_SWZONE_SIZE_MAX opt_param.h
197 # Generic SCSI options.
198 CAM_MAX_HIGHPOWER opt_cam.h
200 CAM_DEBUG_DELAY opt_cam.h
201 CAM_DEBUG_BUS opt_cam.h
202 CAM_DEBUG_TARGET opt_cam.h
203 CAM_DEBUG_LUN opt_cam.h
204 CAM_DEBUG_FLAGS opt_cam.h
205 SCSI_DELAY opt_scsi.h
206 SCSI_NO_SENSE_STRINGS opt_scsi.h
207 SCSI_NO_OP_STRINGS opt_scsi.h
210 ISCSI_INITIATOR_DEBUG opt_iscsi_initiator.h
212 # Options used only in cam/scsi/scsi_cd.c
213 CHANGER_MIN_BUSY_SECONDS opt_cd.h
214 CHANGER_MAX_BUSY_SECONDS opt_cd.h
216 # Options used only in cam/scsi/scsi_sa.c.
217 SA_IO_TIMEOUT opt_sa.h
218 SA_SPACE_TIMEOUT opt_sa.h
219 SA_REWIND_TIMEOUT opt_sa.h
220 SA_ERASE_TIMEOUT opt_sa.h
221 SA_1FM_AT_EOD opt_sa.h
223 # Options used only in cam/scsi/scsi_pt.c
224 SCSI_PT_DEFAULT_TIMEOUT opt_pt.h
226 # Options used only in cam/scsi/scsi_ses.c
227 SES_ENABLE_PASSTHROUGH opt_ses.h
229 # Options used in dev/sym/ (Symbios SCSI driver).
230 SYM_SETUP_LP_PROBE_MAP opt_sym.h #-Low Priority Probe Map (bits)
231 # Allows the ncr to take precedence
232 # 1 (1<<0) -> 810a, 860
233 # 2 (1<<1) -> 825a, 875, 885, 895
234 # 4 (1<<2) -> 895a, 896, 1510d
235 SYM_SETUP_SCSI_DIFF opt_sym.h #-HVD support for 825a, 875, 885
236 # disabled:0 (default), enabled:1
237 SYM_SETUP_PCI_PARITY opt_sym.h #-PCI parity checking
238 # disabled:0, enabled:1 (default)
239 SYM_SETUP_MAX_LUN opt_sym.h #-Number of LUNs supported
240 # default:8, range:[1..64]
242 # Options used only in pci/ncr.c
243 SCSI_NCR_DEBUG opt_ncr.h
244 SCSI_NCR_MAX_SYNC opt_ncr.h
245 SCSI_NCR_MAX_WIDE opt_ncr.h
246 SCSI_NCR_MYADDR opt_ncr.h
248 # Options used only in pci/isp_pci.c
249 ISP_TARGET_MODE opt_isp.h
251 # Options used in the 'nata' ATA/ATAPI driver
252 ATA_STATIC_ID opt_ata.h
262 ALTQ_FAIRQ opt_altq.h
263 ALTQ_NOPCC opt_altq.h
264 ALTQ_DEBUG opt_altq.h
269 BOOTP_COMPAT opt_bootp.h
270 BOOTP_NFSROOT opt_bootp.h
271 BOOTP_NFSV3 opt_bootp.h
272 BOOTP_WIRED_TO opt_bootp.h
278 MROUTING opt_mrouting.h
283 IPSEC_ESP opt_ipsec.h
284 IPSEC_DEBUG opt_ipsec.h
285 IPSEC_FILTERGIF opt_ipsec.h
286 FAST_IPSEC opt_ipsec.h
289 DUMMYNET_DEBUG opt_ipdn.h
290 IPFIREWALL opt_ipfw.h
291 IPFIREWALL_DEBUG opt_ipfw.h
292 IPFIREWALL_VERBOSE opt_ipfw.h
293 IPFIREWALL_VERBOSE_LIMIT opt_ipfw.h
294 IPFIREWALL_DEFAULT_TO_ACCEPT opt_ipfw.h
295 IPV6FIREWALL opt_ip6fw.h
296 IPV6FIREWALL_VERBOSE opt_ip6fw.h
297 IPV6FIREWALL_VERBOSE_LIMIT opt_ip6fw.h
298 IPV6FIREWALL_DEFAULT_TO_ACCEPT opt_ip6fw.h
306 PPP_BSDCOMP opt_ppp.h
307 PPP_DEFLATE opt_ppp.h
309 SLIP_IFF_OPTS opt_slip.h
311 TCP_SIGNATURE opt_inet.h
312 TCP_DROP_SYNFIN opt_tcp_input.h
315 MBUF_STRESS_TEST opt_mbuf_stress_test.h
317 # (New netgraph, port still in progress)
319 # Netgraph(4). Use option NETGRAPH7 to enable the base netgraph code.
320 # Each netgraph node type can be either be compiled into the kernel
321 # or loaded dynamically. To get the former, include the corresponding
322 # option below. Each type has its own man page, e.g. ng_async(4).
324 NETGRAPH7_DEBUG opt_netgraph.h
325 NETGRAPH7_ASYNC opt_netgraph.h
326 NETGRAPH7_ATMLLC opt_netgraph.h
327 NETGRAPH7_ATM_ATMPIF opt_netgraph.h
328 NETGRAPH7_BLUETOOTH opt_netgraph.h
329 NETGRAPH7_BLUETOOTH_BT3C opt_netgraph.h
330 NETGRAPH7_BLUETOOTH_H4 opt_netgraph.h
331 NETGRAPH7_BLUETOOTH_HCI opt_netgraph.h
332 NETGRAPH7_BLUETOOTH_L2CAP opt_netgraph.h
333 NETGRAPH7_BLUETOOTH_SOCKET opt_netgraph.h
334 NETGRAPH7_BLUETOOTH_UBT opt_netgraph.h
335 NETGRAPH7_BLUETOOTH_UBTBCMFW opt_netgraph.h
336 NETGRAPH7_BPF opt_netgraph.h
337 NETGRAPH7_BRIDGE opt_netgraph.h
338 NETGRAPH7_CAR opt_netgraph.h
339 NETGRAPH7_CISCO opt_netgraph.h
340 NETGRAPH7_DEFLATE opt_netgraph.h
341 NETGRAPH7_DEVICE opt_netgraph.h
342 NETGRAPH7_ECHO opt_netgraph.h
343 NETGRAPH7_EIFACE opt_netgraph.h
344 NETGRAPH7_ETF opt_netgraph.h
345 NETGRAPH7_ETHER opt_netgraph.h
346 NETGRAPH7_FEC opt_netgraph.h
347 NETGRAPH7_FRAME_RELAY opt_netgraph.h
348 NETGRAPH7_GIF opt_netgraph.h
349 NETGRAPH7_GIF_DEMUX opt_netgraph.h
350 NETGRAPH7_HOLE opt_netgraph.h
351 NETGRAPH7_HUB opt_netgraph.h
352 NETGRAPH7_IFACE opt_netgraph.h
353 NETGRAPH7_IP_INPUT opt_netgraph.h
354 NETGRAPH7_IPFW opt_netgraph.h
355 NETGRAPH7_KSOCKET opt_netgraph.h
356 NETGRAPH7_L2TP opt_netgraph.h
357 NETGRAPH7_LMI opt_netgraph.h
358 # MPPC compression requires proprietary files (not included)
359 NETGRAPH7_MPPC_COMPRESSION opt_netgraph.h
360 NETGRAPH7_MPPC_ENCRYPTION opt_netgraph.h
361 NETGRAPH7_NAT opt_netgraph.h
362 NETGRAPH7_NETFLOW opt_netgraph.h
363 NETGRAPH7_ONE2MANY opt_netgraph.h
364 NETGRAPH7_PPP opt_netgraph.h
365 NETGRAPH7_PPPOE opt_netgraph.h
366 NETGRAPH7_PPTPGRE opt_netgraph.h
367 NETGRAPH7_PRED1 opt_netgraph.h
368 NETGRAPH7_RFC1490 opt_netgraph.h
369 NETGRAPH7_SOCKET opt_netgraph.h
370 NETGRAPH7_SPLIT opt_netgraph.h
371 NETGRAPH7_SPPP opt_netgraph.h
372 NETGRAPH7_TAG opt_netgraph.h
373 NETGRAPH7_TCPMSS opt_netgraph.h
374 NETGRAPH7_TEE opt_netgraph.h
375 NETGRAPH7_TTY opt_netgraph.h
376 NETGRAPH7_UI opt_netgraph.h
377 NETGRAPH7_VJC opt_netgraph.h
380 NGATM7_ATM opt_netgraph.h
381 NGATM7_ATMBASE opt_netgraph.h
382 NGATM7_SSCOP opt_netgraph.h
383 NGATM7_SSCFU opt_netgraph.h
384 NGATM7_UNI opt_netgraph.h
385 NGATM7_CCATM opt_netgraph.h
387 # Netgraph(4). Use option NETGRAPH to enable the base netgraph code.
388 # Each netgraph node type can be either be compiled into the kernel
389 # or loaded dynamically. To get the former, include the corresponding
390 # option below. Each type has its own man page, e.g. ng_async(8).
392 NETGRAPH_ASYNC opt_netgraph.h
393 NETGRAPH_BPF opt_netgraph.h
394 NETGRAPH_BRIDGE opt_netgraph.h
395 NETGRAPH_CISCO opt_netgraph.h
396 NETGRAPH_ECHO opt_netgraph.h
397 NETGRAPH_EIFACE opt_netgraph.h
398 NETGRAPH_ETHER opt_netgraph.h
399 NETGRAPH_FEC opt_netgraph.h
400 NETGRAPH_FRAME_RELAY opt_netgraph.h
401 NETGRAPH_HOLE opt_netgraph.h
402 NETGRAPH_IFACE opt_netgraph.h
403 NETGRAPH_KSOCKET opt_netgraph.h
404 NETGRAPH_LMI opt_netgraph.h
405 NETGRAPH_L2TP opt_netgraph.h
406 # MPPC compression requires proprietary files (not included)
407 NETGRAPH_MPPC_COMPRESSION opt_netgraph.h
408 NETGRAPH_MPPC_ENCRYPTION opt_netgraph.h
409 NETGRAPH_ONE2MANY opt_netgraph.h
410 NETGRAPH_PPP opt_netgraph.h
411 NETGRAPH_PPPOE opt_netgraph.h
412 NETGRAPH_PPTPGRE opt_netgraph.h
413 NETGRAPH_RFC1490 opt_netgraph.h
414 NETGRAPH_SOCKET opt_netgraph.h
415 NETGRAPH_TEE opt_netgraph.h
416 NETGRAPH_TTY opt_netgraph.h
417 NETGRAPH_UI opt_netgraph.h
418 NETGRAPH_VJC opt_netgraph.h
434 # XXX Conflict: # of devices vs network protocol (Native ATM).
435 # This makes "atm.h" unusable.
438 # DPT driver debug flags
439 DPT_MEASURE_PERFORMANCE opt_dpt.h
440 DPT_HANDLE_TIMEOUTS opt_dpt.h
441 DPT_TIMEOUT_FACTOR opt_dpt.h
442 DPT_LOST_IRQ opt_dpt.h
443 DPT_RESET_HBA opt_dpt.h
445 # Misc debug flags. Most of these should probably be replaced with
446 # 'DEBUG', and then let people recompile just the interesting modules
447 # with 'make CC="cc -DDEBUG"'.
448 CLUSTERDEBUG opt_debug_cluster.h
449 DEBUG_1284 opt_ppb_1284.h
452 PLIP_DEBUG opt_plip.h
453 LOCKF_DEBUG opt_debug_lockf.h
454 SI_DEBUG opt_debug_si.h
458 FB_INSTALL_CDEV opt_fb.h
460 # ppbus related options
461 PERIPH_1284 opt_ppb_1284.h
462 DONTPROBE_1284 opt_ppb_1284.h
464 # smbus related options
465 ENABLE_ALART opt_intpm.h
467 # These cause changes all over the kernel
468 NO_LWKT_SPLIT_USERPRI opt_global.h
469 BLKDEV_IOSIZE opt_global.h
471 DEBUG_LOCKS opt_global.h
472 DEBUG_LOCKS_LATENCY opt_global.h
473 DEBUG_CRIT_SECTIONS opt_global.h
474 DIAGNOSTIC opt_global.h
475 INVARIANTS opt_global.h
476 VFS_BIO_DEBUG opt_global.h
477 DEBUG_INTERRUPTS opt_global.h
478 SOCKBUF_DEBUG opt_global.h
479 PANIC_DEBUG opt_global.h
480 MBUF_DEBUG opt_global.h
481 PMAP_DEBUG opt_global.h
482 VM_PAGE_DEBUG opt_global.h
483 SLAB_DEBUG opt_global.h
485 # Sample system/interrupt PC
486 DEBUG_PCTRACK opt_pctrack.h
488 # These are VM related options
494 # Size of the kernel message buffer
495 MSGBUF_SIZE opt_msgbuf.h
497 # PCI related options
501 NFS_MINATTRTIMO opt_nfs.h
502 NFS_MAXATTRTIMO opt_nfs.h
503 NFS_MINDIRATTRTIMO opt_nfs.h
504 NFS_MAXDIRATTRTIMO opt_nfs.h
505 NFS_GATHERDELAY opt_nfs.h
506 NFS_UIDHASHSIZ opt_nfs.h
507 NFS_WDELAYHASHSIZ opt_nfs.h
508 NFS_MUIDHASHSIZ opt_nfs.h
509 NFS_NOSERVER opt_nfs.h
513 MSDOSFS_DEBUG opt_msdosfs.h
515 # For the Bt848/Bt848A/Bt849/Bt878/Bt879 driver
516 BROOKTREE_SYSTEM_DEFAULT opt_bktr.h
517 BROOKTREE_ALLOC_PAGES opt_bktr.h
518 BKTR_OVERRIDE_CARD opt_bktr.h
519 BKTR_OVERRIDE_TUNER opt_bktr.h
520 BKTR_OVERRIDE_DBX opt_bktr.h
521 BKTR_OVERRIDE_MSP opt_bktr.h
522 BKTR_SYSTEM_DEFAULT opt_bktr.h
523 BKTR_ALLOC_PAGES opt_bktr.h
524 BKTR_USE_PLL opt_bktr.h
525 BKTR_GPIO_ACCESS opt_bktr.h
526 BKTR_NO_MSP_RESET opt_bktr.h
527 BKTR_430_FX_MODE opt_bktr.h
528 BKTR_SIS_VIA_MODE opt_bktr.h
529 BKTR_NEW_MSP34XX_DRIVER opt_bktr.h
531 # Various mi ISA bus flags
533 COM_MULTIPORT opt_sio.h
534 BREAK_TO_DEBUGGER opt_comconsole.h
535 ALT_BREAK_TO_DEBUGGER opt_comconsole.h
537 # options for bus/device framework
540 # options for USB support
545 VINUMDEBUG opt_vinum.h
547 # Embedded system options
548 UKBD_DFLT_KEYMAP opt_ukbd.h
549 INIT_PATH opt_init_path.h
551 ROOTDEVNAME opt_rootdevname.h
554 PCFCLOCK_VERBOSE opt_pcfclock.h
555 PCFCLOCK_MAX_RETRIES opt_pcfclock.h
557 # Network device queue based polling
558 IFPOLL_ENABLE opt_ifpoll.h
560 # options for ubsec driver
561 UBSEC_DEBUG opt_ubsec.h
562 UBSEC_RNDTEST opt_ubsec.h
563 UBSEC_NO_RNG opt_ubsec.h
565 # options for hifn driver
566 HIFN_DEBUG opt_hifn.h
567 HIFN_RNDTEST opt_hifn.h
568 HIFN_NO_RNG opt_hifn.h
570 # options for safenet driver
571 SAFE_DEBUG opt_safe.h
572 SAFE_NO_RNG opt_safe.h
573 SAFE_RNDTEST opt_safe.h
577 KTR_ENTRIES opt_global.h
580 KTR_DMCRYPT opt_ktr.h
581 KTR_DSCHED_BFQ opt_ktr.h
582 KTR_ETHERNET opt_ktr.h
588 KTR_IF_START opt_ktr.h
590 KTR_KERNENTRY opt_ktr.h
592 KTR_SERIALIZER opt_ktr.h
593 KTR_SPIN_CONTENTION opt_ktr.h
594 KTR_TESTLOG opt_ktr.h
597 KTR_USB_MEMORY opt_ktr.h
598 KTR_USCHED_BSD4 opt_ktr.h
599 KTR_USCHED_DFLY opt_ktr.h
600 KTR_VERBOSE opt_ktr.h
603 NTFS_DEBUG opt_ntfs.h
605 # options for the Atheros driver
607 ATH_DIAGAPI opt_ath.h
612 AH_SUPPORT_AR5416 opt_ah.h
618 BNX_TSO_DEBUG opt_bnx.h
621 ED_NO_MIIBUS opt_ed.h
624 EMX_RSS_DEBUG opt_emx.h
625 EMX_TSO_DEBUG opt_emx.h
628 JME_RSS_DEBUG opt_jme.h
631 IGB_RSS_DEBUG opt_igb.h
632 IGB_MSIX_DEBUG opt_igb.h
635 DCONS_BUF_SIZE opt_dcons.h
636 DCONS_POLL_HZ opt_dcons.h
637 DCONS_FORCE_CONSOLE opt_dcons.h
638 DCONS_FORCE_GDB opt_dcons.h
640 # deprecated drivers and options
641 I_WANT_DEPRECATED_STUFF opt_deprecated.h
645 SCTP_DEBUG opt_sctp.h
646 SCTP_USE_ADLER32 opt_sctp.h
647 SCTP_HIGH_SPEED opt_sctp.h
648 SCTP_STAT_LOGGING opt_sctp.h
649 SCTP_CWND_LOGGING opt_sctp.h
650 SCTP_BLK_LOGGING opt_sctp.h
651 SCTP_STR_LOGGING opt_sctp.h
652 SCTP_FR_LOGGING opt_sctp.h
653 SCTP_MAP_LOGGING opt_sctp.h
655 # syslink kernel support
657 SYSLINK opt_syslink.h
660 DSCHED_AS opt_dsched.h
661 DSCHED_BFQ opt_dsched.h
662 DSCHED_FQ opt_dsched.h
664 # Receive Side Scaling (now basecode)
668 WDOG_DISABLE_ON_PANIC opt_panic.h
669 ERROR_LED_ON_PANIC opt_panic.h
671 # 802.11 support layer
672 IEEE80211_DEBUG opt_wlan.h
673 IEEE80211_DEBUG_REFCNT opt_wlan.h
674 IEEE80211_AMPDU_AGE opt_wlan.h
675 IEEE80211_SUPPORT_MESH opt_wlan.h
676 IEEE80211_SUPPORT_SUPERG opt_wlan.h
677 IEEE80211_SUPPORT_TDMA opt_wlan.h
679 # 802.11 TDMA support
680 TDMA_SLOTLEN_DEFAULT opt_tdma.h
681 TDMA_SLOTCNT_DEFAULT opt_tdma.h
682 TDMA_BINTVAL_DEFAULT opt_tdma.h
683 TDMA_TXRATE_11B_DEFAULT opt_tdma.h
684 TDMA_TXRATE_11G_DEFAULT opt_tdma.h
685 TDMA_TXRATE_11A_DEFAULT opt_tdma.h
686 TDMA_TXRATE_TURBO_DEFAULT opt_tdma.h
687 TDMA_TXRATE_HALF_DEFAULT opt_tdma.h
688 TDMA_TXRATE_QUARTER_DEFAULT opt_tdma.h
689 TDMA_TXRATE_11NA_DEFAULT opt_tdma.h
690 TDMA_TXRATE_11NG_DEFAULT opt_tdma.h
692 PANIC_REBOOT_WAIT_TIME opt_panic.h
694 # Obsolete options (will be removed in the future)
696 DEVICE_POLLING opt_dontuse.h