Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Luis R. Rodriguez | 4d8cd26 | 2009-09-08 12:09:47 -0700 | [diff] [blame] | 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 | |
Christian Lamparter | f456228 | 2011-02-09 22:13:11 +0100 | [diff] [blame] | 38 | What: AR9170USB |
| 39 | When: 2.6.40 |
| 40 | |
| 41 | Why: This driver is deprecated and the firmware is no longer |
| 42 | maintained. The replacement driver "carl9170" has been |
| 43 | around for a while, so the devices are still supported. |
| 44 | |
| 45 | Who: Christian Lamparter <chunkeey@googlemail.com> |
| 46 | |
| 47 | --------------------------- |
| 48 | |
Robin Getz | 9d9b8fb | 2009-06-17 16:25:54 -0700 | [diff] [blame] | 49 | What: IRQF_SAMPLE_RANDOM |
| 50 | Check: IRQF_SAMPLE_RANDOM |
| 51 | When: July 2009 |
| 52 | |
| 53 | Why: Many of IRQF_SAMPLE_RANDOM users are technically bogus as entropy |
| 54 | sources in the kernel's current entropy model. To resolve this, every |
| 55 | input point to the kernel's entropy pool needs to better document the |
| 56 | type of entropy source it actually is. This will be replaced with |
| 57 | additional add_*_randomness functions in drivers/char/random.c |
| 58 | |
| 59 | Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com> |
| 60 | |
| 61 | --------------------------- |
| 62 | |
Jiri Slaby | b694e52 | 2010-01-27 23:47:50 +0100 | [diff] [blame] | 63 | What: Deprecated snapshot ioctls |
| 64 | When: 2.6.36 |
| 65 | |
| 66 | Why: The ioctls in kernel/power/user.c were marked as deprecated long time |
| 67 | ago. Now they notify users about that so that they need to replace |
| 68 | their userspace. After some more time, remove them completely. |
| 69 | |
| 70 | Who: Jiri Slaby <jirislaby@gmail.com> |
| 71 | |
| 72 | --------------------------- |
| 73 | |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 74 | What: The ieee80211_regdom module parameter |
Luis R. Rodriguez | 8a5117d | 2009-03-24 21:21:07 -0400 | [diff] [blame] | 75 | When: March 2010 / desktop catchup |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 76 | |
| 77 | Why: This was inherited by the CONFIG_WIRELESS_OLD_REGULATORY code, |
| 78 | and currently serves as an option for users to define an |
| 79 | ISO / IEC 3166 alpha2 code for the country they are currently |
| 80 | present in. Although there are userspace API replacements for this |
| 81 | through nl80211 distributions haven't yet caught up with implementing |
| 82 | decent alternatives through standard GUIs. Although available as an |
| 83 | option through iw or wpa_supplicant its just a matter of time before |
| 84 | distributions pick up good GUI options for this. The ideal solution |
| 85 | would actually consist of intelligent designs which would do this for |
| 86 | the user automatically even when travelling through different countries. |
| 87 | Until then we leave this module parameter as a compromise. |
| 88 | |
| 89 | When userspace improves with reasonable widely-available alternatives for |
| 90 | this we will no longer need this module parameter. This entry hopes that |
| 91 | by the super-futuristically looking date of "March 2010" we will have |
| 92 | such replacements widely available. |
| 93 | |
| 94 | Who: Luis R. Rodriguez <lrodriguez@atheros.com> |
| 95 | |
| 96 | --------------------------- |
| 97 | |
Alan Stern | 471d055 | 2007-07-12 16:55:07 -0400 | [diff] [blame] | 98 | What: dev->power.power_state |
Pavel Machek | 1ebfd79 | 2006-08-30 13:50:27 -0700 | [diff] [blame] | 99 | When: July 2007 |
| 100 | Why: Broken design for runtime control over driver power states, confusing |
| 101 | driver-internal runtime power management with: mechanisms to support |
| 102 | system-wide sleep state transitions; event codes that distinguish |
| 103 | different phases of swsusp "sleep" transitions; and userspace policy |
| 104 | inputs. This framework was never widely used, and most attempts to |
| 105 | use it were broken. Drivers should instead be exposing domain-specific |
| 106 | interfaces either to kernel or to userspace. |
Pavel Machek | a253129 | 2010-07-18 14:27:13 +0200 | [diff] [blame] | 107 | Who: Pavel Machek <pavel@ucw.cz> |
Pavel Machek | 1ebfd79 | 2006-08-30 13:50:27 -0700 | [diff] [blame] | 108 | |
| 109 | --------------------------- |
| 110 | |
Mauro Carvalho Chehab | 7af97ef | 2010-09-30 08:25:42 -0300 | [diff] [blame] | 111 | What: Video4Linux obsolete drivers using V4L1 API |
Hans Verkuil | 439105b | 2010-12-25 07:46:56 -0300 | [diff] [blame] | 112 | When: kernel 2.6.39 |
| 113 | Files: drivers/staging/se401/* drivers/staging/usbvideo/* |
| 114 | Check: drivers/staging/se401/se401.c drivers/staging/usbvideo/usbvideo.c |
Mauro Carvalho Chehab | 7af97ef | 2010-09-30 08:25:42 -0300 | [diff] [blame] | 115 | Why: There are some drivers still using V4L1 API, despite all efforts we've done |
| 116 | to migrate. Those drivers are for obsolete hardware that the old maintainer |
| 117 | didn't care (or not have the hardware anymore), and that no other developer |
| 118 | could find any hardware to buy. They probably have no practical usage today, |
| 119 | and people with such old hardware could probably keep using an older version |
Hans Verkuil | 439105b | 2010-12-25 07:46:56 -0300 | [diff] [blame] | 120 | of the kernel. Those drivers will be moved to staging on 2.6.38 and, if nobody |
| 121 | cares enough to port and test them with V4L2 API, they'll be removed on 2.6.39. |
Mauro Carvalho Chehab | 7af97ef | 2010-09-30 08:25:42 -0300 | [diff] [blame] | 122 | Who: Mauro Carvalho Chehab <mchehab@infradead.org> |
| 123 | |
| 124 | --------------------------- |
| 125 | |
Mauro Carvalho Chehab | 1035758 | 2010-12-27 11:14:52 -0300 | [diff] [blame] | 126 | What: Video4Linux: Remove obsolete ioctl's |
| 127 | When: kernel 2.6.39 |
| 128 | Files: include/media/videodev2.h |
| 129 | Why: Some ioctl's were defined wrong on 2.6.2 and 2.6.6, using the wrong |
| 130 | type of R/W arguments. They were fixed, but the old ioctl names are |
| 131 | still there, maintained to avoid breaking binary compatibility: |
| 132 | #define VIDIOC_OVERLAY_OLD _IOWR('V', 14, int) |
| 133 | #define VIDIOC_S_PARM_OLD _IOW('V', 22, struct v4l2_streamparm) |
| 134 | #define VIDIOC_S_CTRL_OLD _IOW('V', 28, struct v4l2_control) |
| 135 | #define VIDIOC_G_AUDIO_OLD _IOWR('V', 33, struct v4l2_audio) |
| 136 | #define VIDIOC_G_AUDOUT_OLD _IOWR('V', 49, struct v4l2_audioout) |
| 137 | #define VIDIOC_CROPCAP_OLD _IOR('V', 58, struct v4l2_cropcap) |
| 138 | There's no sense on preserving those forever, as it is very doubtful |
| 139 | that someone would try to use a such old binary with a modern kernel. |
| 140 | Removing them will allow us to remove some magic done at the V4L ioctl |
| 141 | handler. |
| 142 | |
| 143 | Who: Mauro Carvalho Chehab <mchehab@infradead.org> |
| 144 | |
| 145 | --------------------------- |
| 146 | |
Eric W. Biederman | 7058cb0 | 2007-10-18 03:05:58 -0700 | [diff] [blame] | 147 | What: sys_sysctl |
| 148 | When: September 2010 |
| 149 | Option: CONFIG_SYSCTL_SYSCALL |
| 150 | Why: The same information is available in a more convenient from |
| 151 | /proc/sys, and none of the sysctl variables appear to be |
| 152 | important performance wise. |
| 153 | |
| 154 | Binary sysctls are a long standing source of subtle kernel |
| 155 | bugs and security issues. |
| 156 | |
| 157 | When I looked several months ago all I could find after |
| 158 | searching several distributions were 5 user space programs and |
| 159 | glibc (which falls back to /proc/sys) using this syscall. |
| 160 | |
| 161 | The man page for sysctl(2) documents it as unusable for user |
| 162 | space programs. |
| 163 | |
| 164 | sysctl(2) is not generally ABI compatible to a 32bit user |
| 165 | space application on a 64bit and a 32bit kernel. |
| 166 | |
| 167 | For the last several months the policy has been no new binary |
| 168 | sysctls and no one has put forward an argument to use them. |
| 169 | |
| 170 | Binary sysctls issues seem to keep happening appearing so |
| 171 | properly deprecating them (with a warning to user space) and a |
| 172 | 2 year grace warning period will mean eventually we can kill |
| 173 | them and end the pain. |
| 174 | |
| 175 | In the mean time individual binary sysctls can be dealt with |
| 176 | in a piecewise fashion. |
| 177 | |
| 178 | Who: Eric Biederman <ebiederm@xmission.com> |
| 179 | |
| 180 | --------------------------- |
| 181 | |
David Rientjes | 51b1bd2 | 2010-08-09 17:19:47 -0700 | [diff] [blame] | 182 | What: /proc/<pid>/oom_adj |
| 183 | When: August 2012 |
| 184 | Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's |
| 185 | badness heuristic used to determine which task to kill when the kernel |
| 186 | is out of memory. |
| 187 | |
| 188 | The badness heuristic has since been rewritten since the introduction of |
| 189 | this tunable such that its meaning is deprecated. The value was |
| 190 | implemented as a bitshift on a score generated by the badness() |
| 191 | function that did not have any precise units of measure. With the |
| 192 | rewrite, the score is given as a proportion of available memory to the |
| 193 | task allocating pages, so using a bitshift which grows the score |
| 194 | exponentially is, thus, impossible to tune with fine granularity. |
| 195 | |
| 196 | A much more powerful interface, /proc/<pid>/oom_score_adj, was |
| 197 | introduced with the oom killer rewrite that allows users to increase or |
| 198 | decrease the badness() score linearly. This interface will replace |
| 199 | /proc/<pid>/oom_adj. |
| 200 | |
| 201 | A warning will be emitted to the kernel log if an application uses this |
| 202 | deprecated interface. After it is printed once, future warnings will be |
| 203 | suppressed until the kernel is rebooted. |
| 204 | |
| 205 | --------------------------- |
| 206 | |
Andres Salomon | cf8e908 | 2011-01-12 17:00:12 -0800 | [diff] [blame] | 207 | What: CS5535/CS5536 obsolete GPIO driver |
| 208 | When: June 2011 |
| 209 | Files: drivers/staging/cs5535_gpio/* |
| 210 | Check: drivers/staging/cs5535_gpio/cs5535_gpio.c |
| 211 | Why: A newer driver replaces this; it is drivers/gpio/cs5535-gpio.c, and |
| 212 | integrates with the Linux GPIO subsystem. The old driver has been |
| 213 | moved to staging, and will be removed altogether around 2.6.40. |
| 214 | Please test the new driver, and ensure that the functionality you |
| 215 | need and any bugfixes from the old driver are available in the new |
| 216 | one. |
| 217 | Who: Andres Salomon <dilinger@queued.net> |
| 218 | |
| 219 | -------------------------- |
| 220 | |
Christoph Hellwig | ac51589 | 2006-03-24 03:18:22 -0800 | [diff] [blame] | 221 | What: remove EXPORT_SYMBOL(kernel_thread) |
| 222 | When: August 2006 |
| 223 | Files: arch/*/kernel/*_ksyms.c |
Andy Whitcroft | f0a594c | 2007-07-19 01:48:34 -0700 | [diff] [blame] | 224 | Check: kernel_thread |
Christoph Hellwig | ac51589 | 2006-03-24 03:18:22 -0800 | [diff] [blame] | 225 | Why: kernel_thread is a low-level implementation detail. Drivers should |
| 226 | use the <linux/kthread.h> API instead which shields them from |
| 227 | implementation details and provides a higherlevel interface that |
| 228 | prevents bugs and code duplication |
| 229 | Who: Christoph Hellwig <hch@lst.de> |
| 230 | |
| 231 | --------------------------- |
| 232 | |
Arjan van de Ven | f71d20e | 2006-06-28 04:26:45 -0700 | [diff] [blame] | 233 | What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports |
| 234 | (temporary transition config option provided until then) |
| 235 | The transition config option will also be removed at the same time. |
| 236 | When: before 2.6.19 |
| 237 | Why: Unused symbols are both increasing the size of the kernel binary |
| 238 | and are often a sign of "wrong API" |
| 239 | Who: Arjan van de Ven <arjan@linux.intel.com> |
| 240 | |
| 241 | --------------------------- |
| 242 | |
Kay Sievers | d81d9d6 | 2006-08-13 06:17:09 +0200 | [diff] [blame] | 243 | What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment |
Dominik Brodowski | acbd39f | 2006-09-30 22:41:43 -0400 | [diff] [blame] | 244 | When: October 2008 |
Kay Sievers | d81d9d6 | 2006-08-13 06:17:09 +0200 | [diff] [blame] | 245 | Why: The stacking of class devices makes these values misleading and |
| 246 | inconsistent. |
| 247 | Class devices should not carry any of these properties, and bus |
| 248 | devices have SUBSYTEM and DRIVER as a replacement. |
| 249 | Who: Kay Sievers <kay.sievers@suse.de> |
| 250 | |
| 251 | --------------------------- |
Jean Delvare | 6c805d2 | 2006-08-13 23:45:52 +0200 | [diff] [blame] | 252 | |
Zhang Rui | b981c59 | 2007-01-29 11:02:30 +0800 | [diff] [blame] | 253 | What: ACPI procfs interface |
Zhang Rui | 8b8eb7d | 2007-07-18 17:23:24 +0800 | [diff] [blame] | 254 | When: July 2008 |
| 255 | Why: ACPI sysfs conversion should be finished by January 2008. |
| 256 | ACPI procfs interface will be removed in July 2008 so that |
| 257 | there is enough time for the user space to catch up. |
Zhang Rui | b981c59 | 2007-01-29 11:02:30 +0800 | [diff] [blame] | 258 | Who: Zhang Rui <rui.zhang@intel.com> |
| 259 | |
| 260 | --------------------------- |
| 261 | |
Zhang Rui | 6d855fc | 2011-01-10 11:16:30 +0800 | [diff] [blame] | 262 | What: CONFIG_ACPI_PROCFS_POWER |
| 263 | When: 2.6.39 |
| 264 | Why: sysfs I/F for ACPI power devices, including AC and Battery, |
| 265 | has been working in upstream kenrel since 2.6.24, Sep 2007. |
| 266 | In 2.6.37, we make the sysfs I/F always built in and this option |
| 267 | disabled by default. |
| 268 | Remove this option and the ACPI power procfs interface in 2.6.39. |
| 269 | Who: Zhang Rui <rui.zhang@intel.com> |
| 270 | |
| 271 | --------------------------- |
| 272 | |
Len Brown | 1bb67c2 | 2007-01-11 01:49:44 -0500 | [diff] [blame] | 273 | What: /proc/acpi/button |
| 274 | When: August 2007 |
| 275 | Why: /proc/acpi/button has been replaced by events to the input layer |
| 276 | since 2.6.20. |
| 277 | Who: Len Brown <len.brown@intel.com> |
| 278 | |
| 279 | --------------------------- |
Jeff Garzik | 54b290a | 2007-01-23 00:29:01 -0500 | [diff] [blame] | 280 | |
Len Brown | 14e04fb | 2007-08-23 15:20:26 -0400 | [diff] [blame] | 281 | What: /proc/acpi/event |
| 282 | When: February 2008 |
| 283 | Why: /proc/acpi/event has been replaced by events via the input layer |
| 284 | and netlink since 2.6.23. |
| 285 | Who: Len Brown <len.brown@intel.com> |
| 286 | |
| 287 | --------------------------- |
| 288 | |
Thomas Gleixner | 914d97f | 2007-10-11 11:20:05 +0200 | [diff] [blame] | 289 | What: i386/x86_64 bzImage symlinks |
Ingo Molnar | 19b4e7f | 2008-04-10 10:12:27 +0200 | [diff] [blame] | 290 | When: April 2010 |
Thomas Gleixner | 914d97f | 2007-10-11 11:20:05 +0200 | [diff] [blame] | 291 | |
| 292 | Why: The i386/x86_64 merge provides a symlink to the old bzImage |
| 293 | location so not yet updated user space tools, e.g. package |
| 294 | scripts, do not break. |
| 295 | Who: Thomas Gleixner <tglx@linutronix.de> |
Linus Torvalds | 038a500 | 2007-10-11 19:40:14 -0700 | [diff] [blame] | 296 | |
| 297 | --------------------------- |
| 298 | |
David Brownell | 8a0cecf | 2009-04-02 16:57:06 -0700 | [diff] [blame] | 299 | What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib |
| 300 | When: February 2010 |
| 301 | Why: All callers should use explicit gpio_request()/gpio_free(). |
| 302 | The autorequest mechanism in gpiolib was provided mostly as a |
| 303 | migration aid for legacy GPIO interfaces (for SOC based GPIOs). |
| 304 | Those users have now largely migrated. Platforms implementing |
| 305 | the GPIO interfaces without using gpiolib will see no changes. |
| 306 | Who: David Brownell <dbrownell@users.sourceforge.net> |
| 307 | --------------------------- |
| 308 | |
Michael Buesch | eb189d8 | 2008-01-28 14:47:41 -0800 | [diff] [blame] | 309 | What: b43 support for firmware revision < 410 |
Michael Buesch | c557289 | 2008-12-27 18:26:39 +0100 | [diff] [blame] | 310 | When: The schedule was July 2008, but it was decided that we are going to keep the |
| 311 | code as long as there are no major maintanance headaches. |
| 312 | So it _could_ be removed _any_ time now, if it conflicts with something new. |
Michael Buesch | eb189d8 | 2008-01-28 14:47:41 -0800 | [diff] [blame] | 313 | Why: The support code for the old firmware hurts code readability/maintainability |
| 314 | and slightly hurts runtime performance. Bugfixes for the old firmware |
| 315 | are not provided by Broadcom anymore. |
| 316 | Who: Michael Buesch <mb@bu3sch.de> |
David S. Miller | e88bb41 | 2008-02-09 23:08:53 -0800 | [diff] [blame] | 317 | |
| 318 | --------------------------- |
| 319 | |
Mark Fasheh | 52f7c21 | 2008-01-29 17:08:26 -0800 | [diff] [blame] | 320 | What: /sys/o2cb symlink |
| 321 | When: January 2010 |
| 322 | Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb |
| 323 | exists as a symlink for backwards compatibility for old versions of |
| 324 | ocfs2-tools. 2 years should be sufficient time to phase in new versions |
| 325 | which know to look in /sys/fs/o2cb. |
| 326 | Who: ocfs2-devel@oss.oracle.com |
Matthew Wilcox | d2f5e80 | 2008-04-19 13:49:34 -0400 | [diff] [blame] | 327 | |
| 328 | --------------------------- |
| 329 | |
Ravikiran G Thirumalai | 2584e51 | 2009-03-31 15:21:26 -0700 | [diff] [blame] | 330 | What: Ability for non root users to shm_get hugetlb pages based on mlock |
| 331 | resource limits |
| 332 | When: 2.6.31 |
| 333 | Why: Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or |
| 334 | have CAP_IPC_LOCK to be able to allocate shm segments backed by |
| 335 | huge pages. The mlock based rlimit check to allow shm hugetlb is |
| 336 | inconsistent with mmap based allocations. Hence it is being |
| 337 | deprecated. |
| 338 | Who: Ravikiran Thirumalai <kiran@scalex86.org> |
| 339 | |
| 340 | --------------------------- |
| 341 | |
Rene Herman | 16d7523 | 2008-06-24 19:38:56 +0200 | [diff] [blame] | 342 | What: CONFIG_THERMAL_HWMON |
| 343 | When: January 2009 |
| 344 | Why: This option was introduced just to allow older lm-sensors userspace |
| 345 | to keep working over the upgrade to 2.6.26. At the scheduled time of |
| 346 | removal fixed lm-sensors (2.x or 3.x) should be readily available. |
| 347 | Who: Rene Herman <rene.herman@gmail.com> |
Johannes Berg | 22bb1be | 2008-07-10 11:16:47 +0200 | [diff] [blame] | 348 | |
| 349 | --------------------------- |
| 350 | |
| 351 | What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS |
| 352 | (in net/core/net-sysfs.c) |
| 353 | When: After the only user (hal) has seen a release with the patches |
| 354 | for enough time, probably some time in 2010. |
| 355 | Why: Over 1K .text/.data size reduction, data is available in other |
| 356 | ways (ioctls) |
| 357 | Who: Johannes Berg <johannes@sipsolutions.net> |
Krzysztof Piotr Oledzki | 5840157 | 2008-07-21 10:01:34 -0700 | [diff] [blame] | 358 | |
| 359 | --------------------------- |
| 360 | |
Dave Jones | 753b7ae | 2009-03-09 15:14:37 -0400 | [diff] [blame] | 361 | What: sysfs ui for changing p4-clockmod parameters |
| 362 | When: September 2009 |
| 363 | Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and |
| 364 | e088e4c9cdb618675874becb91b2fd581ee707e6. |
| 365 | Removal is subject to fixing any remaining bugs in ACPI which may |
| 366 | cause the thermal throttling not to happen at the right time. |
| 367 | Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com> |
Thomas Gleixner | 0e57aa1 | 2009-03-13 14:34:05 +0100 | [diff] [blame] | 368 | |
| 369 | ----------------------------- |
| 370 | |
Alex Chiang | f110ca4 | 2009-03-20 14:56:56 -0600 | [diff] [blame] | 371 | What: fakephp and associated sysfs files in /sys/bus/pci/slots/ |
| 372 | When: 2011 |
| 373 | Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to |
| 374 | represent a machine's physical PCI slots. The change in semantics |
| 375 | had userspace implications, as the hotplug core no longer allowed |
| 376 | drivers to create multiple sysfs files per physical slot (required |
| 377 | for multi-function devices, e.g.). fakephp was seen as a developer's |
| 378 | tool only, and its interface changed. Too late, we learned that |
| 379 | there were some users of the fakephp interface. |
| 380 | |
| 381 | In 2.6.30, the original fakephp interface was restored. At the same |
| 382 | time, the PCI core gained the ability that fakephp provided, namely |
| 383 | function-level hot-remove and hot-add. |
| 384 | |
| 385 | Since the PCI core now provides the same functionality, exposed in: |
| 386 | |
| 387 | /sys/bus/pci/rescan |
| 388 | /sys/bus/pci/devices/.../remove |
| 389 | /sys/bus/pci/devices/.../rescan |
| 390 | |
| 391 | there is no functional reason to maintain fakephp as well. |
| 392 | |
| 393 | We will keep the existing module so that 'modprobe fakephp' will |
| 394 | present the old /sys/bus/pci/slots/... interface for compatibility, |
| 395 | but users are urged to migrate their applications to the API above. |
| 396 | |
| 397 | After a reasonable transition period, we will remove the legacy |
| 398 | fakephp interface. |
| 399 | Who: Alex Chiang <achiang@hp.com> |
Jean Delvare | 3f307fb | 2009-04-13 17:02:13 +0200 | [diff] [blame] | 400 | |
| 401 | --------------------------- |
| 402 | |
Johannes Berg | c64fb01 | 2009-06-02 13:01:38 +0200 | [diff] [blame] | 403 | What: CONFIG_RFKILL_INPUT |
| 404 | When: 2.6.33 |
| 405 | Why: Should be implemented in userspace, policy daemon. |
| 406 | Who: Johannes Berg <johannes@sipsolutions.net> |
David S. Miller | 9cbc1cb | 2009-06-15 03:02:23 -0700 | [diff] [blame] | 407 | |
Andi Kleen | 45f458e | 2009-04-28 23:18:26 +0200 | [diff] [blame] | 408 | ---------------------------- |
| 409 | |
Tejun Heo | 93fe448 | 2009-08-06 18:14:26 +0900 | [diff] [blame] | 410 | What: sound-slot/service-* module aliases and related clutters in |
| 411 | sound/sound_core.c |
| 412 | When: August 2010 |
| 413 | Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR |
| 414 | (14) and requests modules using custom sound-slot/service-* |
| 415 | module aliases. The only benefit of doing this is allowing |
| 416 | use of custom module aliases which might as well be considered |
| 417 | a bug at this point. This preemptive claiming prevents |
| 418 | alternative OSS implementations. |
| 419 | |
| 420 | Till the feature is removed, the kernel will be requesting |
| 421 | both sound-slot/service-* and the standard char-major-* module |
| 422 | aliases and allow turning off the pre-claiming selectively via |
| 423 | CONFIG_SOUND_OSS_CORE_PRECLAIM and soundcore.preclaim_oss |
| 424 | kernel parameter. |
| 425 | |
| 426 | After the transition phase is complete, both the custom module |
| 427 | aliases and switches to disable it will go away. This removal |
| 428 | will also allow making ALSA OSS emulation independent of |
| 429 | sound_core. The dependency will be broken then too. |
| 430 | Who: Tejun Heo <tj@kernel.org> |
Alok Kataria | d0153ca | 2009-09-29 10:25:24 -0700 | [diff] [blame] | 431 | |
| 432 | ---------------------------- |
| 433 | |
Corentin Chary | 728900f | 2009-12-03 07:45:17 +0000 | [diff] [blame] | 434 | What: Support for lcd_switch and display_get in asus-laptop driver |
| 435 | When: March 2010 |
| 436 | Why: These two features use non-standard interfaces. There are the |
| 437 | only features that really need multiple path to guess what's |
| 438 | the right method name on a specific laptop. |
| 439 | |
| 440 | Removing them will allow to remove a lot of code an significantly |
| 441 | clean the drivers. |
| 442 | |
| 443 | This will affect the backlight code which won't be able to know |
| 444 | if the backlight is on or off. The platform display file will also be |
| 445 | write only (like the one in eeepc-laptop). |
| 446 | |
| 447 | This should'nt affect a lot of user because they usually know |
| 448 | when their display is on or off. |
| 449 | |
| 450 | Who: Corentin Chary <corentin.chary@gmail.com> |
| 451 | |
| 452 | ---------------------------- |
Hans de Goede | ceafe1d | 2010-01-11 10:50:53 -0200 | [diff] [blame] | 453 | |
florian@mickler.org | 69c8637 | 2010-02-24 12:05:16 +0100 | [diff] [blame] | 454 | What: sysfs-class-rfkill state file |
| 455 | When: Feb 2014 |
| 456 | Files: net/rfkill/core.c |
| 457 | Why: Documented as obsolete since Feb 2010. This file is limited to 3 |
| 458 | states while the rfkill drivers can have 4 states. |
| 459 | Who: anybody or Florian Mickler <florian@mickler.org> |
| 460 | |
| 461 | ---------------------------- |
| 462 | |
| 463 | What: sysfs-class-rfkill claim file |
| 464 | When: Feb 2012 |
| 465 | Files: net/rfkill/core.c |
| 466 | Why: It is not possible to claim an rfkill driver since 2007. This is |
| 467 | Documented as obsolete since Feb 2010. |
| 468 | Who: anybody or Florian Mickler <florian@mickler.org> |
| 469 | |
| 470 | ---------------------------- |
| 471 | |
Jan Kiszka | 79e95f4 | 2010-02-08 10:12:44 +0000 | [diff] [blame] | 472 | What: capifs |
| 473 | When: February 2011 |
| 474 | Files: drivers/isdn/capi/capifs.* |
| 475 | Why: udev fully replaces this special file system that only contains CAPI |
| 476 | NCCI TTY device nodes. User space (pppdcapiplugin) works without |
| 477 | noticing the difference. |
| 478 | Who: Jan Kiszka <jan.kiszka@web.de> |
Linus Torvalds | c812a51 | 2010-03-05 13:12:34 -0800 | [diff] [blame] | 479 | |
| 480 | ---------------------------- |
| 481 | |
Avi Kivity | db35879 | 2010-01-26 16:30:06 +0200 | [diff] [blame] | 482 | What: KVM paravirt mmu host support |
| 483 | When: January 2011 |
| 484 | Why: The paravirt mmu host support is slower than non-paravirt mmu, both |
| 485 | on newer and older hardware. It is already not exposed to the guest, |
| 486 | and kept only for live migration purposes. |
| 487 | Who: Avi Kivity <avi@redhat.com> |
Linus Torvalds | c812a51 | 2010-03-05 13:12:34 -0800 | [diff] [blame] | 488 | |
| 489 | ---------------------------- |
Len Brown | 4c81ba4 | 2010-03-14 16:28:46 -0400 | [diff] [blame] | 490 | |
Wey-Yi Guy | 2b06861 | 2010-03-22 09:17:39 -0700 | [diff] [blame] | 491 | What: iwlwifi 50XX module parameters |
| 492 | When: 2.6.40 |
| 493 | Why: The "..50" modules parameters were used to configure 5000 series and |
| 494 | up devices; different set of module parameters also available for 4965 |
| 495 | with same functionalities. Consolidate both set into single place |
| 496 | in drivers/net/wireless/iwlwifi/iwl-agn.c |
| 497 | |
| 498 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> |
Wey-Yi Guy | d34a5a6 | 2010-03-23 10:17:03 -0700 | [diff] [blame] | 499 | |
| 500 | ---------------------------- |
| 501 | |
| 502 | What: iwl4965 alias support |
| 503 | When: 2.6.40 |
| 504 | Why: Internal alias support has been present in module-init-tools for some |
| 505 | time, the MODULE_ALIAS("iwl4965") boilerplate aliases can be removed |
| 506 | with no impact. |
| 507 | |
| 508 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> |
Patrick McHardy | 6291055 | 2010-04-20 16:02:01 +0200 | [diff] [blame] | 509 | |
Jan Engelhardt | 0cb47ea | 2010-03-16 18:25:12 +0100 | [diff] [blame] | 510 | --------------------------- |
| 511 | |
| 512 | What: xt_NOTRACK |
| 513 | Files: net/netfilter/xt_NOTRACK.c |
| 514 | When: April 2011 |
| 515 | Why: Superseded by xt_CT |
| 516 | Who: Netfilter developer team <netfilter-devel@vger.kernel.org> |
David S. Miller | 278554b | 2010-05-12 00:05:35 -0700 | [diff] [blame] | 517 | |
Linus Torvalds | 6e0b7b2 | 2010-05-19 17:09:40 -0700 | [diff] [blame] | 518 | ---------------------------- |
| 519 | |
Thomas Gleixner | 6932bf3 | 2010-03-26 00:06:55 +0000 | [diff] [blame] | 520 | What: IRQF_DISABLED |
| 521 | When: 2.6.36 |
| 522 | Why: The flag is a NOOP as we run interrupt handlers with interrupts disabled |
| 523 | Who: Thomas Gleixner <tglx@linutronix.de> |
Linus Torvalds | 6e0b7b2 | 2010-05-19 17:09:40 -0700 | [diff] [blame] | 524 | |
| 525 | ---------------------------- |
| 526 | |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 527 | What: The acpi_sleep=s4_nonvs command line option |
| 528 | When: 2.6.37 |
| 529 | Files: arch/x86/kernel/acpi/sleep.c |
| 530 | Why: superseded by acpi_sleep=nonvs |
| 531 | Who: Rafael J. Wysocki <rjw@sisk.pl> |
| 532 | |
| 533 | ---------------------------- |
FUJITA Tomonori | 1758336 | 2010-08-10 18:03:26 -0700 | [diff] [blame] | 534 | |
| 535 | What: PCI DMA unmap state API |
| 536 | When: August 2012 |
| 537 | Why: PCI DMA unmap state API (include/linux/pci-dma.h) was replaced |
| 538 | with DMA unmap state API (DMA unmap state API can be used for |
| 539 | any bus). |
| 540 | Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> |
| 541 | |
| 542 | ---------------------------- |
FUJITA Tomonori | a35274c | 2010-08-10 18:03:26 -0700 | [diff] [blame] | 543 | |
| 544 | What: DMA_xxBIT_MASK macros |
| 545 | When: Jun 2011 |
| 546 | Why: DMA_xxBIT_MASK macros were replaced with DMA_BIT_MASK() macros. |
| 547 | Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> |
| 548 | |
| 549 | ---------------------------- |
| 550 | |
Daniel Lezcano | 4553175 | 2010-10-27 15:33:38 -0700 | [diff] [blame] | 551 | What: namespace cgroup (ns_cgroup) |
| 552 | When: 2.6.38 |
| 553 | Why: The ns_cgroup leads to some problems: |
| 554 | * cgroup creation is out-of-control |
| 555 | * cgroup name can conflict when pids are looping |
| 556 | * it is not possible to have a single process handling |
| 557 | a lot of namespaces without falling in a exponential creation time |
| 558 | * we may want to create a namespace without creating a cgroup |
| 559 | |
| 560 | The ns_cgroup is replaced by a compatibility flag 'clone_children', |
| 561 | where a newly created cgroup will copy the parent cgroup values. |
| 562 | The userspace has to manually create a cgroup and add a task to |
| 563 | the 'tasks' file. |
| 564 | Who: Daniel Lezcano <daniel.lezcano@free.fr> |
| 565 | |
| 566 | ---------------------------- |
| 567 | |
Wey-Yi Guy | 72645ef | 2010-10-06 07:42:43 -0700 | [diff] [blame] | 568 | What: iwlwifi disable_hw_scan module parameters |
| 569 | When: 2.6.40 |
| 570 | Why: Hareware scan is the prefer method for iwlwifi devices for |
| 571 | scanning operation. Remove software scan support for all the |
| 572 | iwlwifi devices. |
| 573 | |
| 574 | Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> |
| 575 | |
| 576 | ---------------------------- |
Linus Torvalds | 4390110 | 2010-10-26 09:55:25 -0700 | [diff] [blame] | 577 | |
NeilBrown | c67874f | 2010-09-22 12:55:07 +1000 | [diff] [blame] | 578 | What: access to nfsd auth cache through sys_nfsservctl or '.' files |
| 579 | in the 'nfsd' filesystem. |
| 580 | When: 2.6.40 |
| 581 | Why: This is a legacy interface which have been replaced by a more |
| 582 | dynamic cache. Continuing to maintain this interface is an |
| 583 | unnecessary burden. |
| 584 | Who: NeilBrown <neilb@suse.de> |
| 585 | |
| 586 | ---------------------------- |
Jean Delvare | e1e18ee | 2010-11-15 22:40:38 +0100 | [diff] [blame] | 587 | |
Tejun Heo | ed41390 | 2010-12-14 16:23:10 +0100 | [diff] [blame] | 588 | What: cancel_rearming_delayed_work[queue]() |
| 589 | When: 2.6.39 |
| 590 | |
| 591 | Why: The functions have been superceded by cancel_delayed_work_sync() |
| 592 | quite some time ago. The conversion is trivial and there is no |
| 593 | in-kernel user left. |
| 594 | Who: Tejun Heo <tj@kernel.org> |
| 595 | |
| 596 | ---------------------------- |
Jean Delvare | 632bdb2 | 2011-01-12 21:55:10 +0100 | [diff] [blame] | 597 | |
| 598 | What: Legacy, non-standard chassis intrusion detection interface. |
| 599 | When: June 2011 |
| 600 | Why: The adm9240, w83792d and w83793 hardware monitoring drivers have |
| 601 | legacy interfaces for chassis intrusion detection. A standard |
| 602 | interface has been added to each driver, so the legacy interface |
| 603 | can be removed. |
| 604 | Who: Jean Delvare <khali@linux-fr.org> |
| 605 | |
| 606 | ---------------------------- |
Michal Hocko | 552b372 | 2011-02-01 15:52:31 -0800 | [diff] [blame] | 607 | |
Jan Engelhardt | cc4fc02 | 2011-01-18 17:32:40 +0100 | [diff] [blame] | 608 | What: xt_connlimit rev 0 |
| 609 | When: 2012 |
| 610 | Who: Jan Engelhardt <jengelh@medozas.de> |
| 611 | Files: net/netfilter/xt_connlimit.c |
| 612 | |
| 613 | ---------------------------- |
David S. Miller | da935c6 | 2011-02-19 19:17:35 -0800 | [diff] [blame] | 614 | |
Michal Hocko | 552b372 | 2011-02-01 15:52:31 -0800 | [diff] [blame] | 615 | What: noswapaccount kernel command line parameter |
| 616 | When: 2.6.40 |
| 617 | Why: The original implementation of memsw feature enabled by |
| 618 | CONFIG_CGROUP_MEM_RES_CTLR_SWAP could be disabled by the noswapaccount |
| 619 | kernel parameter (introduced in 2.6.29-rc1). Later on, this decision |
| 620 | turned out to be not ideal because we cannot have the feature compiled |
| 621 | in and disabled by default and let only interested to enable it |
| 622 | (e.g. general distribution kernels might need it). Therefore we have |
| 623 | added swapaccount[=0|1] parameter (introduced in 2.6.37) which provides |
| 624 | the both possibilities. If we remove noswapaccount we will have |
| 625 | less command line parameters with the same functionality and we |
| 626 | can also cleanup the parameter handling a bit (). |
| 627 | Who: Michal Hocko <mhocko@suse.cz> |
| 628 | |
| 629 | ---------------------------- |
David S. Miller | 31111c2 | 2011-03-15 13:03:27 -0700 | [diff] [blame] | 630 | |
Florian Westphal | de81bbe | 2011-03-15 20:16:20 +0100 | [diff] [blame] | 631 | What: ipt_addrtype match include file |
| 632 | When: 2012 |
| 633 | Why: superseded by xt_addrtype |
| 634 | Who: Florian Westphal <fw@strlen.de> |
| 635 | Files: include/linux/netfilter_ipv4/ipt_addrtype.h |
| 636 | |
| 637 | ---------------------------- |
Jean Delvare | fe6fc25 | 2011-03-20 14:50:53 +0100 | [diff] [blame] | 638 | |
| 639 | What: i2c_driver.attach_adapter |
| 640 | i2c_driver.detach_adapter |
| 641 | When: September 2011 |
| 642 | Why: These legacy callbacks should no longer be used as i2c-core offers |
| 643 | a variety of preferable alternative ways to instantiate I2C devices. |
| 644 | Who: Jean Delvare <khali@linux-fr.org> |
| 645 | |
| 646 | ---------------------------- |