Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | The following is a list of files and features that are going to be |
2 | removed in the kernel source tree. Every entry should contain what | |
3 | exactly is going away, why it is happening, and who is going to be doing | |
4 | the work. When the feature is removed from the kernel, it should also | |
5 | be removed from this file. | |
6 | ||
7 | --------------------------- | |
8 | ||
4d8cd268 LR |
9 | What: PRISM54 |
10 | When: 2.6.34 | |
11 | ||
12 | Why: prism54 FullMAC PCI / Cardbus devices used to be supported only by the | |
13 | prism54 wireless driver. After Intersil stopped selling these | |
14 | devices in preference for the newer more flexible SoftMAC devices | |
15 | a SoftMAC device driver was required and prism54 did not support | |
16 | them. The p54pci driver now exists and has been present in the kernel for | |
17 | a while. This driver supports both SoftMAC devices and FullMAC devices. | |
18 | The main difference between these devices was the amount of memory which | |
19 | could be used for the firmware. The SoftMAC devices support a smaller | |
20 | amount of memory. Because of this the SoftMAC firmware fits into FullMAC | |
21 | devices's memory. p54pci supports not only PCI / Cardbus but also USB | |
22 | and SPI. Since p54pci supports all devices prism54 supports | |
23 | you will have a conflict. I'm not quite sure how distributions are | |
24 | handling this conflict right now. prism54 was kept around due to | |
25 | claims users may experience issues when using the SoftMAC driver. | |
26 | Time has passed users have not reported issues. If you use prism54 | |
27 | and for whatever reason you cannot use p54pci please let us know! | |
28 | E-mail us at: linux-wireless@vger.kernel.org | |
29 | ||
30 | For more information see the p54 wiki page: | |
31 | ||
32 | http://wireless.kernel.org/en/users/Drivers/p54 | |
33 | ||
34 | Who: Luis R. Rodriguez <lrodriguez@atheros.com> | |
35 | ||
36 | --------------------------- | |
37 | ||
9d9b8fb0 RG |
38 | What: IRQF_SAMPLE_RANDOM |
39 | Check: IRQF_SAMPLE_RANDOM | |
40 | When: July 2009 | |
41 | ||
42 | Why: Many of IRQF_SAMPLE_RANDOM users are technically bogus as entropy | |
43 | sources in the kernel's current entropy model. To resolve this, every | |
44 | input point to the kernel's entropy pool needs to better document the | |
45 | type of entropy source it actually is. This will be replaced with | |
46 | additional add_*_randomness functions in drivers/char/random.c | |
47 | ||
48 | Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com> | |
49 | ||
50 | --------------------------- | |
51 | ||
b694e52e JS |
52 | What: Deprecated snapshot ioctls |
53 | When: 2.6.36 | |
54 | ||
55 | Why: The ioctls in kernel/power/user.c were marked as deprecated long time | |
56 | ago. Now they notify users about that so that they need to replace | |
57 | their userspace. After some more time, remove them completely. | |
58 | ||
59 | Who: Jiri Slaby <jirislaby@gmail.com> | |
60 | ||
61 | --------------------------- | |
62 | ||
6ee7d330 | 63 | What: The ieee80211_regdom module parameter |
8a5117d8 | 64 | When: March 2010 / desktop catchup |
6ee7d330 LR |
65 | |
66 | Why: This was inherited by the CONFIG_WIRELESS_OLD_REGULATORY code, | |
67 | and currently serves as an option for users to define an | |
68 | ISO / IEC 3166 alpha2 code for the country they are currently | |
69 | present in. Although there are userspace API replacements for this | |
70 | through nl80211 distributions haven't yet caught up with implementing | |
71 | decent alternatives through standard GUIs. Although available as an | |
72 | option through iw or wpa_supplicant its just a matter of time before | |
73 | distributions pick up good GUI options for this. The ideal solution | |
74 | would actually consist of intelligent designs which would do this for | |
75 | the user automatically even when travelling through different countries. | |
76 | Until then we leave this module parameter as a compromise. | |
77 | ||
78 | When userspace improves with reasonable widely-available alternatives for | |
79 | this we will no longer need this module parameter. This entry hopes that | |
80 | by the super-futuristically looking date of "March 2010" we will have | |
81 | such replacements widely available. | |
82 | ||
83 | Who: Luis R. Rodriguez <lrodriguez@atheros.com> | |
84 | ||
85 | --------------------------- | |
86 | ||
471d0558 | 87 | What: dev->power.power_state |
1ebfd79e PM |
88 | When: July 2007 |
89 | Why: Broken design for runtime control over driver power states, confusing | |
90 | driver-internal runtime power management with: mechanisms to support | |
91 | system-wide sleep state transitions; event codes that distinguish | |
92 | different phases of swsusp "sleep" transitions; and userspace policy | |
93 | inputs. This framework was never widely used, and most attempts to | |
94 | use it were broken. Drivers should instead be exposing domain-specific | |
95 | interfaces either to kernel or to userspace. | |
96 | Who: Pavel Machek <pavel@suse.cz> | |
97 | ||
98 | --------------------------- | |
99 | ||
42d12f5a MCC |
100 | What: Video4Linux API 1 ioctls and from Video devices. |
101 | When: July 2009 | |
102 | Files: include/linux/videodev.h | |
103 | Check: include/linux/videodev.h | |
11a5a10e | 104 | Why: V4L1 AP1 was replaced by V4L2 API during migration from 2.4 to 2.6 |
875c296b MCC |
105 | series. The old API have lots of drawbacks and don't provide enough |
106 | means to work with all video and audio standards. The newer API is | |
107 | already available on the main drivers and should be used instead. | |
108 | Newer drivers should use v4l_compat_translate_ioctl function to handle | |
109 | old calls, replacing to newer ones. | |
110 | Decoder iocts are using internally to allow video drivers to | |
111 | communicate with video decoders. This should also be improved to allow | |
112 | V4L2 calls being translated into compatible internal ioctls. | |
11a5a10e MCC |
113 | Compatibility ioctls will be provided, for a while, via |
114 | v4l1-compat module. | |
115 | Who: Mauro Carvalho Chehab <mchehab@infradead.org> | |
875c296b MCC |
116 | |
117 | --------------------------- | |
118 | ||
bf45d9b0 | 119 | What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl]) |
a3f916f2 | 120 | When: 2.6.35/2.6.36 |
bf45d9b0 DB |
121 | Files: drivers/pcmcia/: pcmcia_ioctl.c |
122 | Why: With the 16-bit PCMCIA subsystem now behaving (almost) like a | |
123 | normal hotpluggable bus, and with it using the default kernel | |
124 | infrastructure (hotplug, driver core, sysfs) keeping the PCMCIA | |
125 | control ioctl needed by cardmgr and cardctl from pcmcia-cs is | |
a3f916f2 DB |
126 | unnecessary and potentially harmful (it does not provide for |
127 | proper locking), and makes further cleanups and integration of the | |
bf45d9b0 DB |
128 | PCMCIA subsystem into the Linux kernel device driver model more |
129 | difficult. The features provided by cardmgr and cardctl are either | |
130 | handled by the kernel itself now or are available in the new | |
131 | pcmciautils package available at | |
132 | http://kernel.org/pub/linux/utils/kernel/pcmcia/ | |
a3f916f2 DB |
133 | |
134 | For all architectures except ARM, the associated config symbol | |
135 | has been removed from kernel 2.6.34; for ARM, it will be likely | |
136 | be removed from kernel 2.6.35. The actual code will then likely | |
137 | be removed from kernel 2.6.36. | |
138 | Who: Dominik Brodowski <linux@dominikbrodowski.net> | |
7af4cc3f HW |
139 | |
140 | --------------------------- | |
141 | ||
7058cb02 EB |
142 | What: sys_sysctl |
143 | When: September 2010 | |
144 | Option: CONFIG_SYSCTL_SYSCALL | |
145 | Why: The same information is available in a more convenient from | |
146 | /proc/sys, and none of the sysctl variables appear to be | |
147 | important performance wise. | |
148 | ||
149 | Binary sysctls are a long standing source of subtle kernel | |
150 | bugs and security issues. | |
151 | ||
152 | When I looked several months ago all I could find after | |
153 | searching several distributions were 5 user space programs and | |
154 | glibc (which falls back to /proc/sys) using this syscall. | |
155 | ||
156 | The man page for sysctl(2) documents it as unusable for user | |
157 | space programs. | |
158 | ||
159 | sysctl(2) is not generally ABI compatible to a 32bit user | |
160 | space application on a 64bit and a 32bit kernel. | |
161 | ||
162 | For the last several months the policy has been no new binary | |
163 | sysctls and no one has put forward an argument to use them. | |
164 | ||
165 | Binary sysctls issues seem to keep happening appearing so | |
166 | properly deprecating them (with a warning to user space) and a | |
167 | 2 year grace warning period will mean eventually we can kill | |
168 | them and end the pain. | |
169 | ||
170 | In the mean time individual binary sysctls can be dealt with | |
171 | in a piecewise fashion. | |
172 | ||
173 | Who: Eric Biederman <ebiederm@xmission.com> | |
174 | ||
175 | --------------------------- | |
176 | ||
ac515898 CH |
177 | What: remove EXPORT_SYMBOL(kernel_thread) |
178 | When: August 2006 | |
179 | Files: arch/*/kernel/*_ksyms.c | |
f0a594c1 | 180 | Check: kernel_thread |
ac515898 CH |
181 | Why: kernel_thread is a low-level implementation detail. Drivers should |
182 | use the <linux/kthread.h> API instead which shields them from | |
183 | implementation details and provides a higherlevel interface that | |
184 | prevents bugs and code duplication | |
185 | Who: Christoph Hellwig <hch@lst.de> | |
186 | ||
187 | --------------------------- | |
188 | ||
f71d20e9 AV |
189 | What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports |
190 | (temporary transition config option provided until then) | |
191 | The transition config option will also be removed at the same time. | |
192 | When: before 2.6.19 | |
193 | Why: Unused symbols are both increasing the size of the kernel binary | |
194 | and are often a sign of "wrong API" | |
195 | Who: Arjan van de Ven <arjan@linux.intel.com> | |
196 | ||
197 | --------------------------- | |
198 | ||
d81d9d6b | 199 | What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment |
acbd39fb | 200 | When: October 2008 |
d81d9d6b KS |
201 | Why: The stacking of class devices makes these values misleading and |
202 | inconsistent. | |
203 | Class devices should not carry any of these properties, and bus | |
204 | devices have SUBSYTEM and DRIVER as a replacement. | |
205 | Who: Kay Sievers <kay.sievers@suse.de> | |
206 | ||
207 | --------------------------- | |
6c805d2c | 208 | |
b981c591 | 209 | What: ACPI procfs interface |
8b8eb7d8 ZR |
210 | When: July 2008 |
211 | Why: ACPI sysfs conversion should be finished by January 2008. | |
212 | ACPI procfs interface will be removed in July 2008 so that | |
213 | there is enough time for the user space to catch up. | |
b981c591 ZR |
214 | Who: Zhang Rui <rui.zhang@intel.com> |
215 | ||
216 | --------------------------- | |
217 | ||
1bb67c25 LB |
218 | What: /proc/acpi/button |
219 | When: August 2007 | |
220 | Why: /proc/acpi/button has been replaced by events to the input layer | |
221 | since 2.6.20. | |
222 | Who: Len Brown <len.brown@intel.com> | |
223 | ||
224 | --------------------------- | |
54b290a2 | 225 | |
14e04fb3 LB |
226 | What: /proc/acpi/event |
227 | When: February 2008 | |
228 | Why: /proc/acpi/event has been replaced by events via the input layer | |
229 | and netlink since 2.6.23. | |
230 | Who: Len Brown <len.brown@intel.com> | |
231 | ||
232 | --------------------------- | |
233 | ||
914d97fd | 234 | What: i386/x86_64 bzImage symlinks |
19b4e7f4 | 235 | When: April 2010 |
914d97fd TG |
236 | |
237 | Why: The i386/x86_64 merge provides a symlink to the old bzImage | |
238 | location so not yet updated user space tools, e.g. package | |
239 | scripts, do not break. | |
240 | Who: Thomas Gleixner <tglx@linutronix.de> | |
038a5008 LT |
241 | |
242 | --------------------------- | |
243 | ||
8a0cecff DB |
244 | What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib |
245 | When: February 2010 | |
246 | Why: All callers should use explicit gpio_request()/gpio_free(). | |
247 | The autorequest mechanism in gpiolib was provided mostly as a | |
248 | migration aid for legacy GPIO interfaces (for SOC based GPIOs). | |
249 | Those users have now largely migrated. Platforms implementing | |
250 | the GPIO interfaces without using gpiolib will see no changes. | |
251 | Who: David Brownell <dbrownell@users.sourceforge.net> | |
252 | --------------------------- | |
253 | ||
eb189d8b | 254 | What: b43 support for firmware revision < 410 |
c557289c MB |
255 | When: The schedule was July 2008, but it was decided that we are going to keep the |
256 | code as long as there are no major maintanance headaches. | |
257 | So it _could_ be removed _any_ time now, if it conflicts with something new. | |
eb189d8b MB |
258 | Why: The support code for the old firmware hurts code readability/maintainability |
259 | and slightly hurts runtime performance. Bugfixes for the old firmware | |
260 | are not provided by Broadcom anymore. | |
261 | Who: Michael Buesch <mb@bu3sch.de> | |
e88bb415 DM |
262 | |
263 | --------------------------- | |
264 | ||
52f7c21b MF |
265 | What: /sys/o2cb symlink |
266 | When: January 2010 | |
267 | Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb | |
268 | exists as a symlink for backwards compatibility for old versions of | |
269 | ocfs2-tools. 2 years should be sufficient time to phase in new versions | |
270 | which know to look in /sys/fs/o2cb. | |
271 | Who: ocfs2-devel@oss.oracle.com | |
d2f5e808 MW |
272 | |
273 | --------------------------- | |
274 | ||
2584e517 RT |
275 | What: Ability for non root users to shm_get hugetlb pages based on mlock |
276 | resource limits | |
277 | When: 2.6.31 | |
278 | Why: Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or | |
279 | have CAP_IPC_LOCK to be able to allocate shm segments backed by | |
280 | huge pages. The mlock based rlimit check to allow shm hugetlb is | |
281 | inconsistent with mmap based allocations. Hence it is being | |
282 | deprecated. | |
283 | Who: Ravikiran Thirumalai <kiran@scalex86.org> | |
284 | ||
285 | --------------------------- | |
286 | ||
16d75239 RH |
287 | What: CONFIG_THERMAL_HWMON |
288 | When: January 2009 | |
289 | Why: This option was introduced just to allow older lm-sensors userspace | |
290 | to keep working over the upgrade to 2.6.26. At the scheduled time of | |
291 | removal fixed lm-sensors (2.x or 3.x) should be readily available. | |
292 | Who: Rene Herman <rene.herman@gmail.com> | |
22bb1be4 JB |
293 | |
294 | --------------------------- | |
295 | ||
296 | What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS | |
297 | (in net/core/net-sysfs.c) | |
298 | When: After the only user (hal) has seen a release with the patches | |
299 | for enough time, probably some time in 2010. | |
300 | Why: Over 1K .text/.data size reduction, data is available in other | |
301 | ways (ioctls) | |
302 | Who: Johannes Berg <johannes@sipsolutions.net> | |
58401572 KPO |
303 | |
304 | --------------------------- | |
305 | ||
306 | What: CONFIG_NF_CT_ACCT | |
307 | When: 2.6.29 | |
308 | Why: Accounting can now be enabled/disabled without kernel recompilation. | |
309 | Currently used only to set a default value for a feature that is also | |
310 | controlled by a kernel/module/sysfs/sysctl parameter. | |
311 | Who: Krzysztof Piotr Oledzki <ole@ans.pl> | |
312 | ||
46dfa040 FT |
313 | --------------------------- |
314 | ||
753b7aea DJ |
315 | What: sysfs ui for changing p4-clockmod parameters |
316 | When: September 2009 | |
317 | Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and | |
318 | e088e4c9cdb618675874becb91b2fd581ee707e6. | |
319 | Removal is subject to fixing any remaining bugs in ACPI which may | |
320 | cause the thermal throttling not to happen at the right time. | |
321 | Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com> | |
0e57aa11 TG |
322 | |
323 | ----------------------------- | |
324 | ||
325 | What: __do_IRQ all in one fits nothing interrupt handler | |
326 | When: 2.6.32 | |
327 | Why: __do_IRQ was kept for easy migration to the type flow handlers. | |
328 | More than two years of migration time is enough. | |
329 | Who: Thomas Gleixner <tglx@linutronix.de> | |
cb065c06 TG |
330 | |
331 | ----------------------------- | |
332 | ||
f110ca48 AC |
333 | What: fakephp and associated sysfs files in /sys/bus/pci/slots/ |
334 | When: 2011 | |
335 | Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to | |
336 | represent a machine's physical PCI slots. The change in semantics | |
337 | had userspace implications, as the hotplug core no longer allowed | |
338 | drivers to create multiple sysfs files per physical slot (required | |
339 | for multi-function devices, e.g.). fakephp was seen as a developer's | |
340 | tool only, and its interface changed. Too late, we learned that | |
341 | there were some users of the fakephp interface. | |
342 | ||
343 | In 2.6.30, the original fakephp interface was restored. At the same | |
344 | time, the PCI core gained the ability that fakephp provided, namely | |
345 | function-level hot-remove and hot-add. | |
346 | ||
347 | Since the PCI core now provides the same functionality, exposed in: | |
348 | ||
349 | /sys/bus/pci/rescan | |
350 | /sys/bus/pci/devices/.../remove | |
351 | /sys/bus/pci/devices/.../rescan | |
352 | ||
353 | there is no functional reason to maintain fakephp as well. | |
354 | ||
355 | We will keep the existing module so that 'modprobe fakephp' will | |
356 | present the old /sys/bus/pci/slots/... interface for compatibility, | |
357 | but users are urged to migrate their applications to the API above. | |
358 | ||
359 | After a reasonable transition period, we will remove the legacy | |
360 | fakephp interface. | |
361 | Who: Alex Chiang <achiang@hp.com> | |
3f307fb3 JD |
362 | |
363 | --------------------------- | |
364 | ||
c64fb016 JB |
365 | What: CONFIG_RFKILL_INPUT |
366 | When: 2.6.33 | |
367 | Why: Should be implemented in userspace, policy daemon. | |
368 | Who: Johannes Berg <johannes@sipsolutions.net> | |
9cbc1cb8 | 369 | |
cdc321ff EP |
370 | --------------------------- |
371 | ||
372 | What: CONFIG_INOTIFY | |
373 | When: 2.6.33 | |
374 | Why: last user (audit) will be converted to the newer more generic | |
375 | and more easily maintained fsnotify subsystem | |
376 | Who: Eric Paris <eparis@redhat.com> | |
377 | ||
45f458e9 AK |
378 | ---------------------------- |
379 | ||
37c90e88 | 380 | What: lock_policy_rwsem_* and unlock_policy_rwsem_* will not be |
381 | exported interface anymore. | |
382 | When: 2.6.33 | |
383 | Why: cpu_policy_rwsem has a new cleaner definition making it local to | |
384 | cpufreq core and contained inside cpufreq.c. Other dependent | |
385 | drivers should not use it in order to safely avoid lockdep issues. | |
386 | Who: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | |
93fe4483 TH |
387 | |
388 | ---------------------------- | |
389 | ||
390 | What: sound-slot/service-* module aliases and related clutters in | |
391 | sound/sound_core.c | |
392 | When: August 2010 | |
393 | Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR | |
394 | (14) and requests modules using custom sound-slot/service-* | |
395 | module aliases. The only benefit of doing this is allowing | |
396 | use of custom module aliases which might as well be considered | |
397 | a bug at this point. This preemptive claiming prevents | |
398 | alternative OSS implementations. | |
399 | ||
400 | Till the feature is removed, the kernel will be requesting | |
401 | both sound-slot/service-* and the standard char-major-* module | |
402 | aliases and allow turning off the pre-claiming selectively via | |
403 | CONFIG_SOUND_OSS_CORE_PRECLAIM and soundcore.preclaim_oss | |
404 | kernel parameter. | |
405 | ||
406 | After the transition phase is complete, both the custom module | |
407 | aliases and switches to disable it will go away. This removal | |
408 | will also allow making ALSA OSS emulation independent of | |
409 | sound_core. The dependency will be broken then too. | |
410 | Who: Tejun Heo <tj@kernel.org> | |
d0153ca3 AK |
411 | |
412 | ---------------------------- | |
413 | ||
414 | What: Support for VMware's guest paravirtuliazation technique [VMI] will be | |
415 | dropped. | |
416 | When: 2.6.37 or earlier. | |
417 | Why: With the recent innovations in CPU hardware acceleration technologies | |
418 | from Intel and AMD, VMware ran a few experiments to compare these | |
419 | techniques to guest paravirtualization technique on VMware's platform. | |
420 | These hardware assisted virtualization techniques have outperformed the | |
421 | performance benefits provided by VMI in most of the workloads. VMware | |
422 | expects that these hardware features will be ubiquitous in a couple of | |
423 | years, as a result, VMware has started a phased retirement of this | |
424 | feature from the hypervisor. We will be removing this feature from the | |
425 | Kernel too. Right now we are targeting 2.6.37 but can retire earlier if | |
426 | technical reasons (read opportunity to remove major chunk of pvops) | |
427 | arise. | |
428 | ||
429 | Please note that VMI has always been an optimization and non-VMI kernels | |
430 | still work fine on VMware's platform. | |
431 | Latest versions of VMware's product which support VMI are, | |
432 | Workstation 7.0 and VSphere 4.0 on ESX side, future maintainence | |
433 | releases for these products will continue supporting VMI. | |
434 | ||
435 | For more details about VMI retirement take a look at this, | |
436 | http://blogs.vmware.com/guestosguide/2009/09/vmi-retirement.html | |
437 | ||
438 | Who: Alok N Kataria <akataria@vmware.com> | |
439 | ||
440 | ---------------------------- | |
b180d050 | 441 | |
728900f6 CC |
442 | What: Support for lcd_switch and display_get in asus-laptop driver |
443 | When: March 2010 | |
444 | Why: These two features use non-standard interfaces. There are the | |
445 | only features that really need multiple path to guess what's | |
446 | the right method name on a specific laptop. | |
447 | ||
448 | Removing them will allow to remove a lot of code an significantly | |
449 | clean the drivers. | |
450 | ||
451 | This will affect the backlight code which won't be able to know | |
452 | if the backlight is on or off. The platform display file will also be | |
453 | write only (like the one in eeepc-laptop). | |
454 | ||
455 | This should'nt affect a lot of user because they usually know | |
456 | when their display is on or off. | |
457 | ||
458 | Who: Corentin Chary <corentin.chary@gmail.com> | |
459 | ||
460 | ---------------------------- | |
ceafe1d2 HG |
461 | |
462 | What: usbvideo quickcam_messenger driver | |
463 | When: 2.6.35 | |
464 | Files: drivers/media/video/usbvideo/quickcam_messenger.[ch] | |
465 | Why: obsolete v4l1 driver replaced by gspca_stv06xx | |
466 | Who: Hans de Goede <hdegoede@redhat.com> | |
467 | ||
468 | ---------------------------- | |
469 | ||
470 | What: ov511 v4l1 driver | |
471 | When: 2.6.35 | |
472 | Files: drivers/media/video/ov511.[ch] | |
473 | Why: obsolete v4l1 driver replaced by gspca_ov519 | |
474 | Who: Hans de Goede <hdegoede@redhat.com> | |
475 | ||
476 | ---------------------------- | |
477 | ||
478 | What: w9968cf v4l1 driver | |
479 | When: 2.6.35 | |
480 | Files: drivers/media/video/w9968cf*.[ch] | |
481 | Why: obsolete v4l1 driver replaced by gspca_ov519 | |
482 | Who: Hans de Goede <hdegoede@redhat.com> | |
483 | ||
484 | ---------------------------- | |
485 | ||
486 | What: ovcamchip sensor framework | |
487 | When: 2.6.35 | |
488 | Files: drivers/media/video/ovcamchip/* | |
489 | Why: Only used by obsoleted v4l1 drivers | |
490 | Who: Hans de Goede <hdegoede@redhat.com> | |
491 | ||
492 | ---------------------------- | |
493 | ||
494 | What: stv680 v4l1 driver | |
495 | When: 2.6.35 | |
496 | Files: drivers/media/video/stv680.[ch] | |
497 | Why: obsolete v4l1 driver replaced by gspca_stv0680 | |
498 | Who: Hans de Goede <hdegoede@redhat.com> | |
499 | ||
500 | ---------------------------- | |
501 | ||
502 | What: zc0301 v4l driver | |
503 | When: 2.6.35 | |
504 | Files: drivers/media/video/zc0301/* | |
505 | Why: Duplicate functionality with the gspca_zc3xx driver, zc0301 only | |
506 | supports 2 USB-ID's (because it only supports a limited set of | |
507 | sensors) wich are also supported by the gspca_zc3xx driver | |
508 | (which supports 53 USB-ID's in total) | |
509 | Who: Hans de Goede <hdegoede@redhat.com> | |
74e7e725 EM |
510 | |
511 | ---------------------------- | |
512 | ||
513 | What: corgikbd, spitzkbd, tosakbd driver | |
514 | When: 2.6.35 | |
515 | Files: drivers/input/keyboard/{corgi,spitz,tosa}kbd.c | |
516 | Why: We now have a generic GPIO based matrix keyboard driver that | |
517 | are fully capable of handling all the keys on these devices. | |
518 | The original drivers manipulate the GPIO registers directly | |
519 | and so are difficult to maintain. | |
520 | Who: Eric Miao <eric.y.miao@gmail.com> | |
b63de385 EM |
521 | |
522 | ---------------------------- | |
523 | ||
524 | What: corgi_ssp and corgi_ts driver | |
525 | When: 2.6.35 | |
526 | Files: arch/arm/mach-pxa/corgi_ssp.c, drivers/input/touchscreen/corgi_ts.c | |
527 | Why: The corgi touchscreen is now deprecated in favour of the generic | |
528 | ads7846.c driver. The noise reduction technique used in corgi_ts.c, | |
529 | that's to wait till vsync before ADC sampling, is also integrated into | |
530 | ads7846 driver now. Provided that the original driver is not generic | |
531 | and is difficult to maintain, it will be removed later. | |
532 | Who: Eric Miao <eric.y.miao@gmail.com> | |
6d6b89bd LT |
533 | |
534 | ---------------------------- | |
535 | ||
69c86373 | 536 | What: sysfs-class-rfkill state file |
537 | When: Feb 2014 | |
538 | Files: net/rfkill/core.c | |
539 | Why: Documented as obsolete since Feb 2010. This file is limited to 3 | |
540 | states while the rfkill drivers can have 4 states. | |
541 | Who: anybody or Florian Mickler <florian@mickler.org> | |
542 | ||
543 | ---------------------------- | |
544 | ||
545 | What: sysfs-class-rfkill claim file | |
546 | When: Feb 2012 | |
547 | Files: net/rfkill/core.c | |
548 | Why: It is not possible to claim an rfkill driver since 2007. This is | |
549 | Documented as obsolete since Feb 2010. | |
550 | Who: anybody or Florian Mickler <florian@mickler.org> | |
551 | ||
552 | ---------------------------- | |
553 | ||
79e95f47 JK |
554 | What: capifs |
555 | When: February 2011 | |
556 | Files: drivers/isdn/capi/capifs.* | |
557 | Why: udev fully replaces this special file system that only contains CAPI | |
558 | NCCI TTY device nodes. User space (pppdcapiplugin) works without | |
559 | noticing the difference. | |
560 | Who: Jan Kiszka <jan.kiszka@web.de> | |
c812a51d LT |
561 | |
562 | ---------------------------- | |
563 | ||
db358796 AK |
564 | What: KVM memory aliases support |
565 | When: July 2010 | |
566 | Why: Memory aliasing support is used for speeding up guest vga access | |
567 | through the vga windows. | |
568 | ||
569 | Modern userspace no longer uses this feature, so it's just bitrotted | |
570 | code and can be removed with no impact. | |
571 | Who: Avi Kivity <avi@redhat.com> | |
572 | ||
573 | ---------------------------- | |
574 | ||
575 | What: KVM kernel-allocated memory slots | |
576 | When: July 2010 | |
577 | Why: Since 2.6.25, kvm supports user-allocated memory slots, which are | |
578 | much more flexible than kernel-allocated slots. All current userspace | |
579 | supports the newer interface and this code can be removed with no | |
580 | impact. | |
581 | Who: Avi Kivity <avi@redhat.com> | |
582 | ||
583 | ---------------------------- | |
584 | ||
585 | What: KVM paravirt mmu host support | |
586 | When: January 2011 | |
587 | Why: The paravirt mmu host support is slower than non-paravirt mmu, both | |
588 | on newer and older hardware. It is already not exposed to the guest, | |
589 | and kept only for live migration purposes. | |
590 | Who: Avi Kivity <avi@redhat.com> | |
c812a51d LT |
591 | |
592 | ---------------------------- | |
4c81ba49 LB |
593 | |
594 | What: "acpi=ht" boot option | |
595 | When: 2.6.35 | |
596 | Why: Useful in 2003, implementation is a hack. | |
597 | Generally invoked by accident today. | |
598 | Seen as doing more harm than good. | |
599 | Who: Len Brown <len.brown@intel.com> | |
0cb47ea2 | 600 | |
5c01d566 JL |
601 | ---------------------------- |
602 | ||
2b068618 WYG |
603 | What: iwlwifi 50XX module parameters |
604 | When: 2.6.40 | |
605 | Why: The "..50" modules parameters were used to configure 5000 series and | |
606 | up devices; different set of module parameters also available for 4965 | |
607 | with same functionalities. Consolidate both set into single place | |
608 | in drivers/net/wireless/iwlwifi/iwl-agn.c | |
609 | ||
610 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> | |
d34a5a62 WYG |
611 | |
612 | ---------------------------- | |
613 | ||
614 | What: iwl4965 alias support | |
615 | When: 2.6.40 | |
616 | Why: Internal alias support has been present in module-init-tools for some | |
617 | time, the MODULE_ALIAS("iwl4965") boilerplate aliases can be removed | |
618 | with no impact. | |
619 | ||
620 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> | |
62910554 | 621 | |
0cb47ea2 JE |
622 | --------------------------- |
623 | ||
624 | What: xt_NOTRACK | |
625 | Files: net/netfilter/xt_NOTRACK.c | |
626 | When: April 2011 | |
627 | Why: Superseded by xt_CT | |
628 | Who: Netfilter developer team <netfilter-devel@vger.kernel.org> | |
278554bd DM |
629 | |
630 | --------------------------- | |
b75396a4 HV |
631 | |
632 | What: video4linux /dev/vtx teletext API support | |
633 | When: 2.6.35 | |
634 | Files: drivers/media/video/saa5246a.c drivers/media/video/saa5249.c | |
635 | include/linux/videotext.h | |
636 | Why: The vtx device nodes have been superseded by vbi device nodes | |
637 | for many years. No applications exist that use the vtx support. | |
638 | Of the two i2c drivers that actually support this API the saa5249 | |
639 | has been impossible to use for a year now and no known hardware | |
640 | that supports this device exists. The saa5246a is theoretically | |
641 | supported by the old mxb boards, but it never actually worked. | |
642 | ||
643 | In summary: there is no hardware that can use this API and there | |
644 | are no applications actually implementing this API. | |
645 | ||
646 | The vtx support still reserves minors 192-223 and we would really | |
647 | like to reuse those for upcoming new functionality. In the unlikely | |
648 | event that new hardware appears that wants to use the functionality | |
649 | provided by the vtx API, then that functionality should be build | |
650 | around the sliced VBI API instead. | |
651 | Who: Hans Verkuil <hverkuil@xs4all.nl> |