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Commit | Line | Data |
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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 | ||
3b70b2e5 LB |
9 | What: x86 floppy disable_hlt |
10 | When: 2012 | |
11 | Why: ancient workaround of dubious utility clutters the | |
12 | code used by everybody else. | |
13 | Who: Len Brown <len.brown@intel.com> | |
14 | ||
15 | --------------------------- | |
16 | ||
99c63221 LB |
17 | What: CONFIG_APM_CPU_IDLE, and its ability to call APM BIOS in idle |
18 | When: 2012 | |
19 | Why: 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. | |
23 | Who: Len Brown <len.brown@intel.com> | |
24 | ||
25 | ---------------------------- | |
26 | ||
cdaab4a0 LB |
27 | What: x86_32 "no-hlt" cmdline param |
28 | When: 2012 | |
29 | Why: 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. | |
34 | Who: Len Brown <len.brown@intel.com> | |
35 | ||
36 | ---------------------------- | |
37 | ||
5d4c47e0 LB |
38 | What: x86 "idle=mwait" cmdline param |
39 | When: 2012 | |
40 | Why: simplify x86 idle code | |
41 | Who: Len Brown <len.brown@intel.com> | |
42 | ||
43 | ---------------------------- | |
44 | ||
4d8cd268 LR |
45 | What: PRISM54 |
46 | When: 2.6.34 | |
47 | ||
48 | Why: 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 | ||
70 | Who: Luis R. Rodriguez <lrodriguez@atheros.com> | |
71 | ||
72 | --------------------------- | |
73 | ||
9d9b8fb0 RG |
74 | What: IRQF_SAMPLE_RANDOM |
75 | Check: IRQF_SAMPLE_RANDOM | |
76 | When: July 2009 | |
77 | ||
78 | Why: 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 | ||
84 | Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com> | |
85 | ||
86 | --------------------------- | |
87 | ||
b694e52e JS |
88 | What: Deprecated snapshot ioctls |
89 | When: 2.6.36 | |
90 | ||
91 | Why: 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 | ||
95 | Who: Jiri Slaby <jirislaby@gmail.com> | |
96 | ||
97 | --------------------------- | |
98 | ||
6ee7d330 | 99 | What: The ieee80211_regdom module parameter |
8a5117d8 | 100 | When: March 2010 / desktop catchup |
6ee7d330 LR |
101 | |
102 | Why: 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 | ||
119 | Who: Luis R. Rodriguez <lrodriguez@atheros.com> | |
120 | ||
121 | --------------------------- | |
122 | ||
471d0558 | 123 | What: dev->power.power_state |
1ebfd79e PM |
124 | When: July 2007 |
125 | Why: 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. | |
a2531293 | 132 | Who: Pavel Machek <pavel@ucw.cz> |
1ebfd79e PM |
133 | |
134 | --------------------------- | |
135 | ||
7058cb02 EB |
136 | What: sys_sysctl |
137 | When: September 2010 | |
138 | Option: CONFIG_SYSCTL_SYSCALL | |
139 | Why: 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 | ||
167 | Who: Eric Biederman <ebiederm@xmission.com> | |
168 | ||
169 | --------------------------- | |
170 | ||
51b1bd2a DR |
171 | What: /proc/<pid>/oom_adj |
172 | When: August 2012 | |
173 | Why: /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 | |
11239836 | 187 | decrease the badness score linearly. This interface will replace |
51b1bd2a DR |
188 | /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 | --------------------------- | |
cf8e9086 | 195 | |
ac515898 CH |
196 | What: remove EXPORT_SYMBOL(kernel_thread) |
197 | When: August 2006 | |
198 | Files: arch/*/kernel/*_ksyms.c | |
f0a594c1 | 199 | Check: kernel_thread |
ac515898 CH |
200 | Why: 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 | |
204 | Who: Christoph Hellwig <hch@lst.de> | |
205 | ||
206 | --------------------------- | |
207 | ||
f71d20e9 AV |
208 | What: 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. | |
211 | When: before 2.6.19 | |
212 | Why: Unused symbols are both increasing the size of the kernel binary | |
213 | and are often a sign of "wrong API" | |
214 | Who: Arjan van de Ven <arjan@linux.intel.com> | |
215 | ||
216 | --------------------------- | |
217 | ||
d81d9d6b | 218 | What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment |
acbd39fb | 219 | When: October 2008 |
d81d9d6b KS |
220 | Why: 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. | |
224 | Who: Kay Sievers <kay.sievers@suse.de> | |
225 | ||
226 | --------------------------- | |
6c805d2c | 227 | |
b981c591 | 228 | What: ACPI procfs interface |
8b8eb7d8 ZR |
229 | When: July 2008 |
230 | Why: 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. | |
b981c591 ZR |
233 | Who: Zhang Rui <rui.zhang@intel.com> |
234 | ||
235 | --------------------------- | |
236 | ||
6d855fcd ZR |
237 | What: CONFIG_ACPI_PROCFS_POWER |
238 | When: 2.6.39 | |
239 | Why: sysfs I/F for ACPI power devices, including AC and Battery, | |
70f23fd6 | 240 | has been working in upstream kernel since 2.6.24, Sep 2007. |
6d855fcd ZR |
241 | 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. | |
244 | Who: Zhang Rui <rui.zhang@intel.com> | |
245 | ||
246 | --------------------------- | |
247 | ||
14e04fb3 LB |
248 | What: /proc/acpi/event |
249 | When: February 2008 | |
250 | Why: /proc/acpi/event has been replaced by events via the input layer | |
251 | and netlink since 2.6.23. | |
252 | Who: Len Brown <len.brown@intel.com> | |
253 | ||
254 | --------------------------- | |
255 | ||
914d97fd | 256 | What: i386/x86_64 bzImage symlinks |
19b4e7f4 | 257 | When: April 2010 |
914d97fd TG |
258 | |
259 | Why: 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. | |
262 | Who: Thomas Gleixner <tglx@linutronix.de> | |
038a5008 LT |
263 | |
264 | --------------------------- | |
265 | ||
8a0cecff DB |
266 | What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib |
267 | When: February 2010 | |
268 | Why: 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. | |
273 | Who: David Brownell <dbrownell@users.sourceforge.net> | |
274 | --------------------------- | |
275 | ||
eb189d8b | 276 | What: b43 support for firmware revision < 410 |
c557289c MB |
277 | When: 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. | |
eb189d8b MB |
280 | Why: 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. | |
eb032b98 | 283 | Who: Michael Buesch <m@bues.ch> |
e88bb415 DM |
284 | |
285 | --------------------------- | |
286 | ||
2584e517 RT |
287 | What: Ability for non root users to shm_get hugetlb pages based on mlock |
288 | resource limits | |
289 | When: 2.6.31 | |
290 | Why: 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. | |
295 | Who: Ravikiran Thirumalai <kiran@scalex86.org> | |
296 | ||
297 | --------------------------- | |
298 | ||
22bb1be4 JB |
299 | What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS |
300 | (in net/core/net-sysfs.c) | |
301 | When: After the only user (hal) has seen a release with the patches | |
302 | for enough time, probably some time in 2010. | |
303 | Why: Over 1K .text/.data size reduction, data is available in other | |
304 | ways (ioctls) | |
305 | Who: Johannes Berg <johannes@sipsolutions.net> | |
58401572 KPO |
306 | |
307 | --------------------------- | |
308 | ||
753b7aea DJ |
309 | What: sysfs ui for changing p4-clockmod parameters |
310 | When: September 2009 | |
311 | Why: 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. | |
315 | Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com> | |
0e57aa11 TG |
316 | |
317 | ----------------------------- | |
318 | ||
f110ca48 AC |
319 | What: fakephp and associated sysfs files in /sys/bus/pci/slots/ |
320 | When: 2011 | |
321 | Why: 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. | |
347 | Who: Alex Chiang <achiang@hp.com> | |
3f307fb3 JD |
348 | |
349 | --------------------------- | |
350 | ||
c64fb016 JB |
351 | What: CONFIG_RFKILL_INPUT |
352 | When: 2.6.33 | |
353 | Why: Should be implemented in userspace, policy daemon. | |
354 | Who: Johannes Berg <johannes@sipsolutions.net> | |
9cbc1cb8 | 355 | |
45f458e9 | 356 | ---------------------------- |
93fe4483 TH |
357 | |
358 | What: sound-slot/service-* module aliases and related clutters in | |
359 | sound/sound_core.c | |
360 | When: August 2010 | |
361 | Why: 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. | |
378 | Who: Tejun Heo <tj@kernel.org> | |
d0153ca3 AK |
379 | |
380 | ---------------------------- | |
381 | ||
69c86373 | 382 | What: sysfs-class-rfkill state file |
383 | When: Feb 2014 | |
384 | Files: net/rfkill/core.c | |
385 | Why: Documented as obsolete since Feb 2010. This file is limited to 3 | |
386 | states while the rfkill drivers can have 4 states. | |
387 | Who: anybody or Florian Mickler <florian@mickler.org> | |
388 | ||
389 | ---------------------------- | |
390 | ||
391 | What: sysfs-class-rfkill claim file | |
392 | When: Feb 2012 | |
393 | Files: net/rfkill/core.c | |
394 | Why: It is not possible to claim an rfkill driver since 2007. This is | |
395 | Documented as obsolete since Feb 2010. | |
396 | Who: anybody or Florian Mickler <florian@mickler.org> | |
397 | ||
398 | ---------------------------- | |
399 | ||
db358796 AK |
400 | What: KVM paravirt mmu host support |
401 | When: January 2011 | |
402 | Why: 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. | |
405 | Who: Avi Kivity <avi@redhat.com> | |
c812a51d LT |
406 | |
407 | ---------------------------- | |
4c81ba49 | 408 | |
2b068618 | 409 | What: iwlwifi 50XX module parameters |
d5b55a8f | 410 | When: 3.0 |
2b068618 WYG |
411 | Why: 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 | ||
416 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> | |
d34a5a62 WYG |
417 | |
418 | ---------------------------- | |
419 | ||
420 | What: iwl4965 alias support | |
d5b55a8f | 421 | When: 3.0 |
d34a5a62 WYG |
422 | Why: 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 | ||
426 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> | |
62910554 | 427 | |
0cb47ea2 JE |
428 | --------------------------- |
429 | ||
430 | What: xt_NOTRACK | |
431 | Files: net/netfilter/xt_NOTRACK.c | |
432 | When: April 2011 | |
433 | Why: Superseded by xt_CT | |
434 | Who: Netfilter developer team <netfilter-devel@vger.kernel.org> | |
278554bd | 435 | |
6e0b7b2c LT |
436 | ---------------------------- |
437 | ||
6932bf37 TG |
438 | What: IRQF_DISABLED |
439 | When: 2.6.36 | |
440 | Why: The flag is a NOOP as we run interrupt handlers with interrupts disabled | |
441 | Who: Thomas Gleixner <tglx@linutronix.de> | |
6e0b7b2c LT |
442 | |
443 | ---------------------------- | |
444 | ||
17583363 FT |
445 | What: PCI DMA unmap state API |
446 | When: August 2012 | |
447 | Why: 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). | |
450 | Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | |
451 | ||
452 | ---------------------------- | |
a35274cd | 453 | |
72645eff | 454 | What: iwlwifi disable_hw_scan module parameters |
d5b55a8f | 455 | When: 3.0 |
72645eff WYG |
456 | Why: Hareware scan is the prefer method for iwlwifi devices for |
457 | scanning operation. Remove software scan support for all the | |
458 | iwlwifi devices. | |
459 | ||
460 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> | |
461 | ||
462 | ---------------------------- | |
4390110f | 463 | |
632bdb24 JD |
464 | What: Legacy, non-standard chassis intrusion detection interface. |
465 | When: June 2011 | |
466 | Why: 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. | |
470 | Who: Jean Delvare <khali@linux-fr.org> | |
471 | ||
472 | ---------------------------- | |
552b372b | 473 | |
cc4fc022 JE |
474 | What: xt_connlimit rev 0 |
475 | When: 2012 | |
476 | Who: Jan Engelhardt <jengelh@medozas.de> | |
477 | Files: net/netfilter/xt_connlimit.c | |
478 | ||
479 | ---------------------------- | |
da935c66 | 480 | |
de81bbea FW |
481 | What: ipt_addrtype match include file |
482 | When: 2012 | |
483 | Why: superseded by xt_addrtype | |
484 | Who: Florian Westphal <fw@strlen.de> | |
485 | Files: include/linux/netfilter_ipv4/ipt_addrtype.h | |
486 | ||
487 | ---------------------------- | |
fe6fc258 JD |
488 | |
489 | What: i2c_driver.attach_adapter | |
490 | i2c_driver.detach_adapter | |
491 | When: September 2011 | |
492 | Why: These legacy callbacks should no longer be used as i2c-core offers | |
493 | a variety of preferable alternative ways to instantiate I2C devices. | |
494 | Who: Jean Delvare <khali@linux-fr.org> | |
495 | ||
496 | ---------------------------- | |
1dc8ddfd LP |
497 | |
498 | What: Support for UVCIOC_CTRL_ADD in the uvcvideo driver | |
d5b55a8f | 499 | When: 3.2 |
1dc8ddfd LP |
500 | Why: The information passed to the driver by this ioctl is now queried |
501 | dynamically from the device. | |
502 | Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
503 | ||
504 | ---------------------------- | |
505 | ||
506 | What: Support for UVCIOC_CTRL_MAP_OLD in the uvcvideo driver | |
d5b55a8f | 507 | When: 3.2 |
1dc8ddfd LP |
508 | Why: Used only by applications compiled against older driver versions. |
509 | Superseded by UVCIOC_CTRL_MAP which supports V4L2 menu controls. | |
510 | Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
511 | ||
512 | ---------------------------- | |
513 | ||
514 | What: Support for UVCIOC_CTRL_GET and UVCIOC_CTRL_SET in the uvcvideo driver | |
d5b55a8f | 515 | When: 3.2 |
1dc8ddfd LP |
516 | Why: Superseded by the UVCIOC_CTRL_QUERY ioctl. |
517 | Who: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
518 | ||
519 | ---------------------------- | |
62936982 | 520 | |
4bf7c61c HG |
521 | What: Support for driver specific ioctls in the pwc driver (everything |
522 | defined in media/pwc-ioctl.h) | |
523 | When: 3.3 | |
524 | Why: This stems from the v4l1 era, with v4l2 everything can be done with | |
525 | standardized v4l2 API calls | |
526 | Who: Hans de Goede <hdegoede@redhat.com> | |
527 | ||
528 | ---------------------------- | |
529 | ||
530 | What: Driver specific sysfs API in the pwc driver | |
531 | When: 3.3 | |
532 | Why: Setting pan/tilt should be done with v4l2 controls, like with other | |
533 | cams. The button is available as a standard input device | |
534 | Who: Hans de Goede <hdegoede@redhat.com> | |
535 | ||
536 | ---------------------------- | |
537 | ||
538 | What: Driver specific use of pixfmt.priv in the pwc driver | |
539 | When: 3.3 | |
540 | Why: The .priv field never was intended for this, setting a framerate is | |
541 | support using the standardized S_PARM ioctl | |
542 | Who: Hans de Goede <hdegoede@redhat.com> | |
543 | ||
544 | ---------------------------- | |
545 | ||
546 | What: Software emulation of arbritary resolutions in the pwc driver | |
547 | When: 3.3 | |
548 | Why: 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. | |
552 | Who: Hans de Goede <hdegoede@redhat.com> | |
553 | ||
554 | ---------------------------- | |
555 | ||
62936982 HV |
556 | What: For VIDIOC_S_FREQUENCY the type field must match the device node's type. |
557 | If not, return -EINVAL. | |
558 | When: 3.2 | |
559 | Why: 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. | |
563 | Who: Hans Verkuil <hans.verkuil@cisco.com> | |
564 | ||
565 | ---------------------------- | |
566 | ||
567 | What: Opening a radio device node will no longer automatically switch the | |
568 | tuner mode from tv to radio. | |
569 | When: 3.3 | |
570 | Why: 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. | |
574 | Who: Hans Verkuil <hans.verkuil@cisco.com> | |
575 | ||
576 | ---------------------------- | |
f549953c | 577 | |
664a51a8 AS |
578 | What: g_file_storage driver |
579 | When: 3.8 | |
580 | Why: This driver has been superseded by g_mass_storage. | |
581 | Who: Alan Stern <stern@rowland.harvard.edu> | |
582 | ||
583 | ---------------------------- | |
7b8aca65 LCY |
584 | |
585 | What: threeg and interface sysfs files in /sys/devices/platform/acer-wmi | |
586 | When: 2012 | |
587 | Why: 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. | |
594 | Who: Lee, Chun-Yi <jlee@novell.com> | |
242d6219 CH |
595 | |
596 | ---------------------------- | |
597 | What: The XFS nodelaylog mount option | |
598 | When: 3.3 | |
599 | Why: The delaylog mode that has been the default since 2.6.39 has proven | |
600 | stable, and the old code is in the way of additional improvements in | |
601 | the log code. | |
602 | Who: Christoph Hellwig <hch@lst.de> |