blob: c4a6e148732ae549be7e25b8863912a2f924d254 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001The following is a list of files and features that are going to be
2removed in the kernel source tree. Every entry should contain what
3exactly is going away, why it is happening, and who is going to be doing
4the work. When the feature is removed from the kernel, it should also
5be removed from this file.
6
7---------------------------
8
Len Brown3b70b2e2011-04-01 15:08:48 -04009What: x86 floppy disable_hlt
10When: 2012
11Why: ancient workaround of dubious utility clutters the
12 code used by everybody else.
13Who: Len Brown <len.brown@intel.com>
14
15---------------------------
16
Len Brown99c63222011-04-01 15:19:23 -040017What: CONFIG_APM_CPU_IDLE, and its ability to call APM BIOS in idle
18When: 2012
19Why: This optional sub-feature of APM is of dubious reliability,
20 and ancient APM laptops are likely better served by calling HLT.
21 Deleting CONFIG_APM_CPU_IDLE allows x86 to stop exporting
22 the pm_idle function pointer to modules.
23Who: Len Brown <len.brown@intel.com>
24
25----------------------------
26
Len Browncdaab4a2011-04-01 15:41:17 -040027What: x86_32 "no-hlt" cmdline param
28When: 2012
29Why: remove a branch from idle path, simplify code used by everybody.
30 This option disabled the use of HLT in idle and machine_halt()
31 for hardware that was flakey 15-years ago. Today we have
32 "idle=poll" that removed HLT from idle, and so if such a machine
33 is still running the upstream kernel, "idle=poll" is likely sufficient.
34Who: Len Brown <len.brown@intel.com>
35
36----------------------------
37
Len Brown5d4c47e2011-04-01 15:46:09 -040038What: x86 "idle=mwait" cmdline param
39When: 2012
40Why: simplify x86 idle code
41Who: Len Brown <len.brown@intel.com>
42
43----------------------------
44
Luis R. Rodriguez4d8cd262009-09-08 12:09:47 -070045What: PRISM54
46When: 2.6.34
47
48Why: prism54 FullMAC PCI / Cardbus devices used to be supported only by the
49 prism54 wireless driver. After Intersil stopped selling these
50 devices in preference for the newer more flexible SoftMAC devices
51 a SoftMAC device driver was required and prism54 did not support
52 them. The p54pci driver now exists and has been present in the kernel for
53 a while. This driver supports both SoftMAC devices and FullMAC devices.
54 The main difference between these devices was the amount of memory which
55 could be used for the firmware. The SoftMAC devices support a smaller
56 amount of memory. Because of this the SoftMAC firmware fits into FullMAC
57 devices's memory. p54pci supports not only PCI / Cardbus but also USB
58 and SPI. Since p54pci supports all devices prism54 supports
59 you will have a conflict. I'm not quite sure how distributions are
60 handling this conflict right now. prism54 was kept around due to
61 claims users may experience issues when using the SoftMAC driver.
62 Time has passed users have not reported issues. If you use prism54
63 and for whatever reason you cannot use p54pci please let us know!
64 E-mail us at: linux-wireless@vger.kernel.org
65
66 For more information see the p54 wiki page:
67
68 http://wireless.kernel.org/en/users/Drivers/p54
69
70Who: Luis R. Rodriguez <lrodriguez@atheros.com>
71
72---------------------------
73
Robin Getz9d9b8fb02009-06-17 16:25:54 -070074What: IRQF_SAMPLE_RANDOM
75Check: IRQF_SAMPLE_RANDOM
76When: July 2009
77
78Why: Many of IRQF_SAMPLE_RANDOM users are technically bogus as entropy
79 sources in the kernel's current entropy model. To resolve this, every
80 input point to the kernel's entropy pool needs to better document the
81 type of entropy source it actually is. This will be replaced with
82 additional add_*_randomness functions in drivers/char/random.c
83
84Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com>
85
86---------------------------
87
Jiri Slabyb694e522010-01-27 23:47:50 +010088What: Deprecated snapshot ioctls
89When: 2.6.36
90
91Why: The ioctls in kernel/power/user.c were marked as deprecated long time
92 ago. Now they notify users about that so that they need to replace
93 their userspace. After some more time, remove them completely.
94
95Who: Jiri Slaby <jirislaby@gmail.com>
96
97---------------------------
98
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -040099What: The ieee80211_regdom module parameter
Luis R. Rodriguez8a5117d2009-03-24 21:21:07 -0400100When: March 2010 / desktop catchup
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -0400101
102Why: This was inherited by the CONFIG_WIRELESS_OLD_REGULATORY code,
103 and currently serves as an option for users to define an
104 ISO / IEC 3166 alpha2 code for the country they are currently
105 present in. Although there are userspace API replacements for this
106 through nl80211 distributions haven't yet caught up with implementing
107 decent alternatives through standard GUIs. Although available as an
108 option through iw or wpa_supplicant its just a matter of time before
109 distributions pick up good GUI options for this. The ideal solution
110 would actually consist of intelligent designs which would do this for
111 the user automatically even when travelling through different countries.
112 Until then we leave this module parameter as a compromise.
113
114 When userspace improves with reasonable widely-available alternatives for
115 this we will no longer need this module parameter. This entry hopes that
116 by the super-futuristically looking date of "March 2010" we will have
117 such replacements widely available.
118
119Who: Luis R. Rodriguez <lrodriguez@atheros.com>
120
121---------------------------
122
Alan Stern471d0552007-07-12 16:55:07 -0400123What: dev->power.power_state
Pavel Machek1ebfd792006-08-30 13:50:27 -0700124When: July 2007
125Why: Broken design for runtime control over driver power states, confusing
126 driver-internal runtime power management with: mechanisms to support
127 system-wide sleep state transitions; event codes that distinguish
128 different phases of swsusp "sleep" transitions; and userspace policy
129 inputs. This framework was never widely used, and most attempts to
130 use it were broken. Drivers should instead be exposing domain-specific
131 interfaces either to kernel or to userspace.
Pavel Macheka2531292010-07-18 14:27:13 +0200132Who: Pavel Machek <pavel@ucw.cz>
Pavel Machek1ebfd792006-08-30 13:50:27 -0700133
134---------------------------
135
Eric W. Biederman7058cb02007-10-18 03:05:58 -0700136What: sys_sysctl
137When: September 2010
138Option: CONFIG_SYSCTL_SYSCALL
139Why: The same information is available in a more convenient from
140 /proc/sys, and none of the sysctl variables appear to be
141 important performance wise.
142
143 Binary sysctls are a long standing source of subtle kernel
144 bugs and security issues.
145
146 When I looked several months ago all I could find after
147 searching several distributions were 5 user space programs and
148 glibc (which falls back to /proc/sys) using this syscall.
149
150 The man page for sysctl(2) documents it as unusable for user
151 space programs.
152
153 sysctl(2) is not generally ABI compatible to a 32bit user
154 space application on a 64bit and a 32bit kernel.
155
156 For the last several months the policy has been no new binary
157 sysctls and no one has put forward an argument to use them.
158
159 Binary sysctls issues seem to keep happening appearing so
160 properly deprecating them (with a warning to user space) and a
161 2 year grace warning period will mean eventually we can kill
162 them and end the pain.
163
164 In the mean time individual binary sysctls can be dealt with
165 in a piecewise fashion.
166
167Who: Eric Biederman <ebiederm@xmission.com>
168
169---------------------------
170
David Rientjes51b1bd22010-08-09 17:19:47 -0700171What: /proc/<pid>/oom_adj
172When: August 2012
173Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
174 badness heuristic used to determine which task to kill when the kernel
175 is out of memory.
176
177 The badness heuristic has since been rewritten since the introduction of
178 this tunable such that its meaning is deprecated. The value was
179 implemented as a bitshift on a score generated by the badness()
180 function that did not have any precise units of measure. With the
181 rewrite, the score is given as a proportion of available memory to the
182 task allocating pages, so using a bitshift which grows the score
183 exponentially is, thus, impossible to tune with fine granularity.
184
185 A much more powerful interface, /proc/<pid>/oom_score_adj, was
186 introduced with the oom killer rewrite that allows users to increase or
David Rientjes11239832011-07-25 17:12:17 -0700187 decrease the badness score linearly. This interface will replace
David Rientjes51b1bd22010-08-09 17:19:47 -0700188 /proc/<pid>/oom_adj.
189
190 A warning will be emitted to the kernel log if an application uses this
191 deprecated interface. After it is printed once, future warnings will be
192 suppressed until the kernel is rebooted.
193
194---------------------------
195
Christoph Hellwigac515892006-03-24 03:18:22 -0800196What: remove EXPORT_SYMBOL(kernel_thread)
197When: August 2006
198Files: arch/*/kernel/*_ksyms.c
Andy Whitcroftf0a594c2007-07-19 01:48:34 -0700199Check: kernel_thread
Christoph Hellwigac515892006-03-24 03:18:22 -0800200Why: kernel_thread is a low-level implementation detail. Drivers should
201 use the <linux/kthread.h> API instead which shields them from
202 implementation details and provides a higherlevel interface that
203 prevents bugs and code duplication
204Who: Christoph Hellwig <hch@lst.de>
205
206---------------------------
207
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700208What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
209 (temporary transition config option provided until then)
210 The transition config option will also be removed at the same time.
211When: before 2.6.19
212Why: Unused symbols are both increasing the size of the kernel binary
213 and are often a sign of "wrong API"
214Who: Arjan van de Ven <arjan@linux.intel.com>
215
216---------------------------
217
Kay Sieversd81d9d62006-08-13 06:17:09 +0200218What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
Dominik Brodowskiacbd39f2006-09-30 22:41:43 -0400219When: October 2008
Kay Sieversd81d9d62006-08-13 06:17:09 +0200220Why: The stacking of class devices makes these values misleading and
221 inconsistent.
222 Class devices should not carry any of these properties, and bus
223 devices have SUBSYTEM and DRIVER as a replacement.
224Who: Kay Sievers <kay.sievers@suse.de>
225
226---------------------------
Jean Delvare6c805d22006-08-13 23:45:52 +0200227
Zhang Ruib981c592007-01-29 11:02:30 +0800228What: ACPI procfs interface
Zhang Rui8b8eb7d2007-07-18 17:23:24 +0800229When: July 2008
230Why: ACPI sysfs conversion should be finished by January 2008.
231 ACPI procfs interface will be removed in July 2008 so that
232 there is enough time for the user space to catch up.
Zhang Ruib981c592007-01-29 11:02:30 +0800233Who: Zhang Rui <rui.zhang@intel.com>
234
235---------------------------
236
Zhang Rui6d855fc2011-01-10 11:16:30 +0800237What: CONFIG_ACPI_PROCFS_POWER
238When: 2.6.39
239Why: sysfs I/F for ACPI power devices, including AC and Battery,
Justin P. Mattock70f23fd2011-05-10 10:16:21 +0200240 has been working in upstream kernel since 2.6.24, Sep 2007.
Zhang Rui6d855fc2011-01-10 11:16:30 +0800241 In 2.6.37, we make the sysfs I/F always built in and this option
242 disabled by default.
243 Remove this option and the ACPI power procfs interface in 2.6.39.
244Who: Zhang Rui <rui.zhang@intel.com>
245
246---------------------------
247
Len Brown14e04fb2007-08-23 15:20:26 -0400248What: /proc/acpi/event
249When: February 2008
250Why: /proc/acpi/event has been replaced by events via the input layer
251 and netlink since 2.6.23.
252Who: Len Brown <len.brown@intel.com>
253
254---------------------------
255
Thomas Gleixner914d97f2007-10-11 11:20:05 +0200256What: i386/x86_64 bzImage symlinks
Ingo Molnar19b4e7f2008-04-10 10:12:27 +0200257When: April 2010
Thomas Gleixner914d97f2007-10-11 11:20:05 +0200258
259Why: The i386/x86_64 merge provides a symlink to the old bzImage
260 location so not yet updated user space tools, e.g. package
261 scripts, do not break.
262Who: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds038a5002007-10-11 19:40:14 -0700263
264---------------------------
265
David Brownell8a0cecf2009-04-02 16:57:06 -0700266What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib
267When: February 2010
268Why: All callers should use explicit gpio_request()/gpio_free().
269 The autorequest mechanism in gpiolib was provided mostly as a
270 migration aid for legacy GPIO interfaces (for SOC based GPIOs).
271 Those users have now largely migrated. Platforms implementing
272 the GPIO interfaces without using gpiolib will see no changes.
273Who: David Brownell <dbrownell@users.sourceforge.net>
274---------------------------
275
Michael Buescheb189d8b2008-01-28 14:47:41 -0800276What: b43 support for firmware revision < 410
Michael Bueschc5572892008-12-27 18:26:39 +0100277When: The schedule was July 2008, but it was decided that we are going to keep the
278 code as long as there are no major maintanance headaches.
279 So it _could_ be removed _any_ time now, if it conflicts with something new.
Michael Buescheb189d8b2008-01-28 14:47:41 -0800280Why: The support code for the old firmware hurts code readability/maintainability
281 and slightly hurts runtime performance. Bugfixes for the old firmware
282 are not provided by Broadcom anymore.
Michael Büscheb032b92011-07-04 20:50:05 +0200283Who: Michael Buesch <m@bues.ch>
David S. Millere88bb412008-02-09 23:08:53 -0800284
285---------------------------
286
Ravikiran G Thirumalai2584e512009-03-31 15:21:26 -0700287What: Ability for non root users to shm_get hugetlb pages based on mlock
288 resource limits
289When: 2.6.31
290Why: Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or
291 have CAP_IPC_LOCK to be able to allocate shm segments backed by
292 huge pages. The mlock based rlimit check to allow shm hugetlb is
293 inconsistent with mmap based allocations. Hence it is being
294 deprecated.
295Who: Ravikiran Thirumalai <kiran@scalex86.org>
296
297---------------------------
298
Johannes Berg22bb1be2008-07-10 11:16:47 +0200299What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS
300 (in net/core/net-sysfs.c)
301When: After the only user (hal) has seen a release with the patches
302 for enough time, probably some time in 2010.
303Why: Over 1K .text/.data size reduction, data is available in other
304 ways (ioctls)
305Who: Johannes Berg <johannes@sipsolutions.net>
Krzysztof Piotr Oledzki58401572008-07-21 10:01:34 -0700306
307---------------------------
308
Dave Jones753b7ae2009-03-09 15:14:37 -0400309What: sysfs ui for changing p4-clockmod parameters
310When: September 2009
311Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and
312 e088e4c9cdb618675874becb91b2fd581ee707e6.
313 Removal is subject to fixing any remaining bugs in ACPI which may
314 cause the thermal throttling not to happen at the right time.
315Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>
Thomas Gleixner0e57aa12009-03-13 14:34:05 +0100316
317-----------------------------
318
Alex Chiangf110ca42009-03-20 14:56:56 -0600319What: fakephp and associated sysfs files in /sys/bus/pci/slots/
320When: 2011
321Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
322 represent a machine's physical PCI slots. The change in semantics
323 had userspace implications, as the hotplug core no longer allowed
324 drivers to create multiple sysfs files per physical slot (required
325 for multi-function devices, e.g.). fakephp was seen as a developer's
326 tool only, and its interface changed. Too late, we learned that
327 there were some users of the fakephp interface.
328
329 In 2.6.30, the original fakephp interface was restored. At the same
330 time, the PCI core gained the ability that fakephp provided, namely
331 function-level hot-remove and hot-add.
332
333 Since the PCI core now provides the same functionality, exposed in:
334
335 /sys/bus/pci/rescan
336 /sys/bus/pci/devices/.../remove
337 /sys/bus/pci/devices/.../rescan
338
339 there is no functional reason to maintain fakephp as well.
340
341 We will keep the existing module so that 'modprobe fakephp' will
342 present the old /sys/bus/pci/slots/... interface for compatibility,
343 but users are urged to migrate their applications to the API above.
344
345 After a reasonable transition period, we will remove the legacy
346 fakephp interface.
347Who: Alex Chiang <achiang@hp.com>
Jean Delvare3f307fb2009-04-13 17:02:13 +0200348
349---------------------------
350
Johannes Bergc64fb012009-06-02 13:01:38 +0200351What: CONFIG_RFKILL_INPUT
352When: 2.6.33
353Why: Should be implemented in userspace, policy daemon.
354Who: Johannes Berg <johannes@sipsolutions.net>
David S. Miller9cbc1cb2009-06-15 03:02:23 -0700355
Andi Kleen45f458e2009-04-28 23:18:26 +0200356----------------------------
357
Tejun Heo93fe4482009-08-06 18:14:26 +0900358What: sound-slot/service-* module aliases and related clutters in
359 sound/sound_core.c
360When: August 2010
361Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR
362 (14) and requests modules using custom sound-slot/service-*
363 module aliases. The only benefit of doing this is allowing
364 use of custom module aliases which might as well be considered
365 a bug at this point. This preemptive claiming prevents
366 alternative OSS implementations.
367
368 Till the feature is removed, the kernel will be requesting
369 both sound-slot/service-* and the standard char-major-* module
370 aliases and allow turning off the pre-claiming selectively via
371 CONFIG_SOUND_OSS_CORE_PRECLAIM and soundcore.preclaim_oss
372 kernel parameter.
373
374 After the transition phase is complete, both the custom module
375 aliases and switches to disable it will go away. This removal
376 will also allow making ALSA OSS emulation independent of
377 sound_core. The dependency will be broken then too.
378Who: Tejun Heo <tj@kernel.org>
Alok Katariad0153ca2009-09-29 10:25:24 -0700379
380----------------------------
381
florian@mickler.org69c86372010-02-24 12:05:16 +0100382What: sysfs-class-rfkill state file
383When: Feb 2014
384Files: net/rfkill/core.c
385Why: Documented as obsolete since Feb 2010. This file is limited to 3
386 states while the rfkill drivers can have 4 states.
387Who: anybody or Florian Mickler <florian@mickler.org>
388
389----------------------------
390
391What: sysfs-class-rfkill claim file
392When: Feb 2012
393Files: net/rfkill/core.c
394Why: It is not possible to claim an rfkill driver since 2007. This is
395 Documented as obsolete since Feb 2010.
396Who: anybody or Florian Mickler <florian@mickler.org>
397
398----------------------------
399
Avi Kivitydb358792010-01-26 16:30:06 +0200400What: KVM paravirt mmu host support
401When: January 2011
402Why: The paravirt mmu host support is slower than non-paravirt mmu, both
403 on newer and older hardware. It is already not exposed to the guest,
404 and kept only for live migration purposes.
405Who: Avi Kivity <avi@redhat.com>
Linus Torvaldsc812a512010-03-05 13:12:34 -0800406
407----------------------------
Len Brown4c81ba42010-03-14 16:28:46 -0400408
Wey-Yi Guy2b068612010-03-22 09:17:39 -0700409What: iwlwifi 50XX module parameters
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700410When: 3.0
Wey-Yi Guy2b068612010-03-22 09:17:39 -0700411Why: The "..50" modules parameters were used to configure 5000 series and
412 up devices; different set of module parameters also available for 4965
413 with same functionalities. Consolidate both set into single place
414 in drivers/net/wireless/iwlwifi/iwl-agn.c
415
416Who: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Wey-Yi Guyd34a5a62010-03-23 10:17:03 -0700417
418----------------------------
419
420What: iwl4965 alias support
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700421When: 3.0
Wey-Yi Guyd34a5a62010-03-23 10:17:03 -0700422Why: Internal alias support has been present in module-init-tools for some
423 time, the MODULE_ALIAS("iwl4965") boilerplate aliases can be removed
424 with no impact.
425
426Who: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Patrick McHardy62910552010-04-20 16:02:01 +0200427
Jan Engelhardt0cb47ea2010-03-16 18:25:12 +0100428---------------------------
429
430What: xt_NOTRACK
431Files: net/netfilter/xt_NOTRACK.c
432When: April 2011
433Why: Superseded by xt_CT
434Who: Netfilter developer team <netfilter-devel@vger.kernel.org>
David S. Miller278554b2010-05-12 00:05:35 -0700435
Linus Torvalds6e0b7b22010-05-19 17:09:40 -0700436----------------------------
437
Thomas Gleixner6932bf32010-03-26 00:06:55 +0000438What: IRQF_DISABLED
439When: 2.6.36
440Why: The flag is a NOOP as we run interrupt handlers with interrupts disabled
441Who: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds6e0b7b22010-05-19 17:09:40 -0700442
443----------------------------
444
FUJITA Tomonori17583362010-08-10 18:03:26 -0700445What: PCI DMA unmap state API
446When: August 2012
447Why: PCI DMA unmap state API (include/linux/pci-dma.h) was replaced
448 with DMA unmap state API (DMA unmap state API can be used for
449 any bus).
450Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
451
452----------------------------
FUJITA Tomonoria35274c2010-08-10 18:03:26 -0700453
Wey-Yi Guy72645ef2010-10-06 07:42:43 -0700454What: iwlwifi disable_hw_scan module parameters
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700455When: 3.0
Wey-Yi Guy72645ef2010-10-06 07:42:43 -0700456Why: Hareware scan is the prefer method for iwlwifi devices for
457 scanning operation. Remove software scan support for all the
458 iwlwifi devices.
459
460Who: Wey-Yi Guy <wey-yi.w.guy@intel.com>
461
462----------------------------
Linus Torvalds43901102010-10-26 09:55:25 -0700463
Jean Delvare632bdb22011-01-12 21:55:10 +0100464What: Legacy, non-standard chassis intrusion detection interface.
465When: June 2011
466Why: The adm9240, w83792d and w83793 hardware monitoring drivers have
467 legacy interfaces for chassis intrusion detection. A standard
468 interface has been added to each driver, so the legacy interface
469 can be removed.
470Who: Jean Delvare <khali@linux-fr.org>
471
472----------------------------
Michal Hocko552b3722011-02-01 15:52:31 -0800473
Jan Engelhardtcc4fc022011-01-18 17:32:40 +0100474What: xt_connlimit rev 0
475When: 2012
476Who: Jan Engelhardt <jengelh@medozas.de>
477Files: net/netfilter/xt_connlimit.c
478
479----------------------------
David S. Millerda935c62011-02-19 19:17:35 -0800480
Florian Westphalde81bbe2011-03-15 20:16:20 +0100481What: ipt_addrtype match include file
482When: 2012
483Why: superseded by xt_addrtype
484Who: Florian Westphal <fw@strlen.de>
485Files: include/linux/netfilter_ipv4/ipt_addrtype.h
486
487----------------------------
Jean Delvarefe6fc252011-03-20 14:50:53 +0100488
489What: i2c_driver.attach_adapter
490 i2c_driver.detach_adapter
491When: September 2011
492Why: These legacy callbacks should no longer be used as i2c-core offers
493 a variety of preferable alternative ways to instantiate I2C devices.
494Who: Jean Delvare <khali@linux-fr.org>
495
496----------------------------
Laurent Pinchart1dc8ddf2010-10-12 12:11:30 -0300497
498What: Support for UVCIOC_CTRL_ADD in the uvcvideo driver
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700499When: 3.2
Laurent Pinchart1dc8ddf2010-10-12 12:11:30 -0300500Why: The information passed to the driver by this ioctl is now queried
501 dynamically from the device.
502Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
503
504----------------------------
505
506What: Support for UVCIOC_CTRL_MAP_OLD in the uvcvideo driver
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700507When: 3.2
Laurent Pinchart1dc8ddf2010-10-12 12:11:30 -0300508Why: Used only by applications compiled against older driver versions.
509 Superseded by UVCIOC_CTRL_MAP which supports V4L2 menu controls.
510Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
511
512----------------------------
513
514What: Support for UVCIOC_CTRL_GET and UVCIOC_CTRL_SET in the uvcvideo driver
Deepak Saxenad5b55a82011-06-09 15:03:03 -0700515When: 3.2
Laurent Pinchart1dc8ddf2010-10-12 12:11:30 -0300516Why: Superseded by the UVCIOC_CTRL_QUERY ioctl.
517Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
518
519----------------------------
Hans Verkuil62936982011-06-13 09:38:54 -0300520
Hans de Goede4bf7c612011-07-03 15:02:10 -0300521What: Support for driver specific ioctls in the pwc driver (everything
522 defined in media/pwc-ioctl.h)
523When: 3.3
524Why: This stems from the v4l1 era, with v4l2 everything can be done with
525 standardized v4l2 API calls
526Who: Hans de Goede <hdegoede@redhat.com>
527
528----------------------------
529
530What: Driver specific sysfs API in the pwc driver
531When: 3.3
532Why: Setting pan/tilt should be done with v4l2 controls, like with other
533 cams. The button is available as a standard input device
534Who: Hans de Goede <hdegoede@redhat.com>
535
536----------------------------
537
538What: Driver specific use of pixfmt.priv in the pwc driver
539When: 3.3
540Why: The .priv field never was intended for this, setting a framerate is
541 support using the standardized S_PARM ioctl
542Who: Hans de Goede <hdegoede@redhat.com>
543
544----------------------------
545
546What: Software emulation of arbritary resolutions in the pwc driver
547When: 3.3
548Why: The pwc driver claims to support any resolution between 160x120
549 and 640x480, but emulates this by simply drawing a black border
550 around the image. Userspace can draw its own black border if it
551 really wants one.
552Who: Hans de Goede <hdegoede@redhat.com>
553
554----------------------------
555
Hans Verkuil62936982011-06-13 09:38:54 -0300556What: For VIDIOC_S_FREQUENCY the type field must match the device node's type.
557 If not, return -EINVAL.
558When: 3.2
559Why: It makes no sense to switch the tuner to radio mode by calling
560 VIDIOC_S_FREQUENCY on a video node, or to switch the tuner to tv mode by
561 calling VIDIOC_S_FREQUENCY on a radio node. This is the first step of a
562 move to more consistent handling of tv and radio tuners.
563Who: Hans Verkuil <hans.verkuil@cisco.com>
564
565----------------------------
566
567What: Opening a radio device node will no longer automatically switch the
568 tuner mode from tv to radio.
569When: 3.3
570Why: Just opening a V4L device should not change the state of the hardware
571 like that. It's very unexpected and against the V4L spec. Instead, you
572 switch to radio mode by calling VIDIOC_S_FREQUENCY. This is the second
573 and last step of the move to consistent handling of tv and radio tuners.
574Who: Hans Verkuil <hans.verkuil@cisco.com>
575
576----------------------------
Linus Torvaldsf5499532011-07-25 23:08:32 -0700577
Alan Stern664a51a2011-06-15 16:31:37 -0400578What: g_file_storage driver
579When: 3.8
580Why: This driver has been superseded by g_mass_storage.
581Who: Alan Stern <stern@rowland.harvard.edu>
582
583----------------------------
Lee, Chun-Yi7b8aca62011-05-31 14:52:22 +0800584
585What: threeg and interface sysfs files in /sys/devices/platform/acer-wmi
586When: 2012
587Why: In 3.0, we can now autodetect internal 3G device and already have
588 the threeg rfkill device. So, we plan to remove threeg sysfs support
589 for it's no longer necessary.
590
591 We also plan to remove interface sysfs file that exposed which ACPI-WMI
592 interface that was used by acer-wmi driver. It will replaced by
593 information log when acer-wmi initial.
594Who: Lee, Chun-Yi <jlee@novell.com>