blob: 842aa9de84a603298f74f9f4b8c036e0104001cf [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001The following is a list of files and features that are going to be
2removed in the kernel source tree. Every entry should contain what
3exactly is going away, why it is happening, and who is going to be doing
4the work. When the feature is removed from the kernel, it should also
5be removed from this file.
6
7---------------------------
8
Luis R. Rodriguez4d8cd262009-09-08 12:09:47 -07009What: PRISM54
10When: 2.6.34
11
12Why: 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
34Who: Luis R. Rodriguez <lrodriguez@atheros.com>
35
36---------------------------
37
Robin Getz9d9b8fb02009-06-17 16:25:54 -070038What: IRQF_SAMPLE_RANDOM
39Check: IRQF_SAMPLE_RANDOM
40When: July 2009
41
42Why: 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
48Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com>
49
50---------------------------
51
Jiri Slabyb694e522010-01-27 23:47:50 +010052What: Deprecated snapshot ioctls
53When: 2.6.36
54
55Why: 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
59Who: Jiri Slaby <jirislaby@gmail.com>
60
61---------------------------
62
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -040063What: The ieee80211_regdom module parameter
Luis R. Rodriguez8a5117d2009-03-24 21:21:07 -040064When: March 2010 / desktop catchup
Luis R. Rodriguez6ee7d332009-03-20 23:53:06 -040065
66Why: 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
83Who: Luis R. Rodriguez <lrodriguez@atheros.com>
84
85---------------------------
86
Alan Stern471d0552007-07-12 16:55:07 -040087What: dev->power.power_state
Pavel Machek1ebfd792006-08-30 13:50:27 -070088When: July 2007
89Why: 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.
Pavel Macheka2531292010-07-18 14:27:13 +020096Who: Pavel Machek <pavel@ucw.cz>
Pavel Machek1ebfd792006-08-30 13:50:27 -070097
98---------------------------
99
Mauro Carvalho Chehab42d12f52009-03-10 05:02:28 -0300100What: Video4Linux API 1 ioctls and from Video devices.
101When: July 2009
102Files: include/linux/videodev.h
103Check: include/linux/videodev.h
Mauro Carvalho Chehab11a5a102007-10-17 15:32:36 -0200104Why: V4L1 AP1 was replaced by V4L2 API during migration from 2.4 to 2.6
Mauro Carvalho Chehab875c2962005-11-08 21:38:53 -0800105 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.
Mauro Carvalho Chehab11a5a102007-10-17 15:32:36 -0200113 Compatibility ioctls will be provided, for a while, via
114 v4l1-compat module.
115Who: Mauro Carvalho Chehab <mchehab@infradead.org>
Mauro Carvalho Chehab875c2962005-11-08 21:38:53 -0800116
117---------------------------
118
Eric W. Biederman7058cb02007-10-18 03:05:58 -0700119What: sys_sysctl
120When: September 2010
121Option: CONFIG_SYSCTL_SYSCALL
122Why: The same information is available in a more convenient from
123 /proc/sys, and none of the sysctl variables appear to be
124 important performance wise.
125
126 Binary sysctls are a long standing source of subtle kernel
127 bugs and security issues.
128
129 When I looked several months ago all I could find after
130 searching several distributions were 5 user space programs and
131 glibc (which falls back to /proc/sys) using this syscall.
132
133 The man page for sysctl(2) documents it as unusable for user
134 space programs.
135
136 sysctl(2) is not generally ABI compatible to a 32bit user
137 space application on a 64bit and a 32bit kernel.
138
139 For the last several months the policy has been no new binary
140 sysctls and no one has put forward an argument to use them.
141
142 Binary sysctls issues seem to keep happening appearing so
143 properly deprecating them (with a warning to user space) and a
144 2 year grace warning period will mean eventually we can kill
145 them and end the pain.
146
147 In the mean time individual binary sysctls can be dealt with
148 in a piecewise fashion.
149
150Who: Eric Biederman <ebiederm@xmission.com>
151
152---------------------------
153
David Rientjes51b1bd22010-08-09 17:19:47 -0700154What: /proc/<pid>/oom_adj
155When: August 2012
156Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's
157 badness heuristic used to determine which task to kill when the kernel
158 is out of memory.
159
160 The badness heuristic has since been rewritten since the introduction of
161 this tunable such that its meaning is deprecated. The value was
162 implemented as a bitshift on a score generated by the badness()
163 function that did not have any precise units of measure. With the
164 rewrite, the score is given as a proportion of available memory to the
165 task allocating pages, so using a bitshift which grows the score
166 exponentially is, thus, impossible to tune with fine granularity.
167
168 A much more powerful interface, /proc/<pid>/oom_score_adj, was
169 introduced with the oom killer rewrite that allows users to increase or
170 decrease the badness() score linearly. This interface will replace
171 /proc/<pid>/oom_adj.
172
173 A warning will be emitted to the kernel log if an application uses this
174 deprecated interface. After it is printed once, future warnings will be
175 suppressed until the kernel is rebooted.
176
177---------------------------
178
Christoph Hellwigac515892006-03-24 03:18:22 -0800179What: remove EXPORT_SYMBOL(kernel_thread)
180When: August 2006
181Files: arch/*/kernel/*_ksyms.c
Andy Whitcroftf0a594c2007-07-19 01:48:34 -0700182Check: kernel_thread
Christoph Hellwigac515892006-03-24 03:18:22 -0800183Why: kernel_thread is a low-level implementation detail. Drivers should
184 use the <linux/kthread.h> API instead which shields them from
185 implementation details and provides a higherlevel interface that
186 prevents bugs and code duplication
187Who: Christoph Hellwig <hch@lst.de>
188
189---------------------------
190
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700191What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
192 (temporary transition config option provided until then)
193 The transition config option will also be removed at the same time.
194When: before 2.6.19
195Why: Unused symbols are both increasing the size of the kernel binary
196 and are often a sign of "wrong API"
197Who: Arjan van de Ven <arjan@linux.intel.com>
198
199---------------------------
200
Kay Sieversd81d9d62006-08-13 06:17:09 +0200201What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
Dominik Brodowskiacbd39f2006-09-30 22:41:43 -0400202When: October 2008
Kay Sieversd81d9d62006-08-13 06:17:09 +0200203Why: The stacking of class devices makes these values misleading and
204 inconsistent.
205 Class devices should not carry any of these properties, and bus
206 devices have SUBSYTEM and DRIVER as a replacement.
207Who: Kay Sievers <kay.sievers@suse.de>
208
209---------------------------
Jean Delvare6c805d22006-08-13 23:45:52 +0200210
Zhang Ruib981c592007-01-29 11:02:30 +0800211What: ACPI procfs interface
Zhang Rui8b8eb7d2007-07-18 17:23:24 +0800212When: July 2008
213Why: ACPI sysfs conversion should be finished by January 2008.
214 ACPI procfs interface will be removed in July 2008 so that
215 there is enough time for the user space to catch up.
Zhang Ruib981c592007-01-29 11:02:30 +0800216Who: Zhang Rui <rui.zhang@intel.com>
217
218---------------------------
219
Len Brown1bb67c22007-01-11 01:49:44 -0500220What: /proc/acpi/button
221When: August 2007
222Why: /proc/acpi/button has been replaced by events to the input layer
223 since 2.6.20.
224Who: Len Brown <len.brown@intel.com>
225
226---------------------------
Jeff Garzik54b290a2007-01-23 00:29:01 -0500227
Len Brown14e04fb2007-08-23 15:20:26 -0400228What: /proc/acpi/event
229When: February 2008
230Why: /proc/acpi/event has been replaced by events via the input layer
231 and netlink since 2.6.23.
232Who: Len Brown <len.brown@intel.com>
233
234---------------------------
235
Thomas Gleixner914d97f2007-10-11 11:20:05 +0200236What: i386/x86_64 bzImage symlinks
Ingo Molnar19b4e7f2008-04-10 10:12:27 +0200237When: April 2010
Thomas Gleixner914d97f2007-10-11 11:20:05 +0200238
239Why: The i386/x86_64 merge provides a symlink to the old bzImage
240 location so not yet updated user space tools, e.g. package
241 scripts, do not break.
242Who: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds038a5002007-10-11 19:40:14 -0700243
244---------------------------
245
David Brownell8a0cecf2009-04-02 16:57:06 -0700246What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib
247When: February 2010
248Why: All callers should use explicit gpio_request()/gpio_free().
249 The autorequest mechanism in gpiolib was provided mostly as a
250 migration aid for legacy GPIO interfaces (for SOC based GPIOs).
251 Those users have now largely migrated. Platforms implementing
252 the GPIO interfaces without using gpiolib will see no changes.
253Who: David Brownell <dbrownell@users.sourceforge.net>
254---------------------------
255
Michael Buescheb189d8b2008-01-28 14:47:41 -0800256What: b43 support for firmware revision < 410
Michael Bueschc5572892008-12-27 18:26:39 +0100257When: The schedule was July 2008, but it was decided that we are going to keep the
258 code as long as there are no major maintanance headaches.
259 So it _could_ be removed _any_ time now, if it conflicts with something new.
Michael Buescheb189d8b2008-01-28 14:47:41 -0800260Why: The support code for the old firmware hurts code readability/maintainability
261 and slightly hurts runtime performance. Bugfixes for the old firmware
262 are not provided by Broadcom anymore.
263Who: Michael Buesch <mb@bu3sch.de>
David S. Millere88bb412008-02-09 23:08:53 -0800264
265---------------------------
266
Mark Fasheh52f7c212008-01-29 17:08:26 -0800267What: /sys/o2cb symlink
268When: January 2010
269Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb
270 exists as a symlink for backwards compatibility for old versions of
271 ocfs2-tools. 2 years should be sufficient time to phase in new versions
272 which know to look in /sys/fs/o2cb.
273Who: ocfs2-devel@oss.oracle.com
Matthew Wilcoxd2f5e802008-04-19 13:49:34 -0400274
275---------------------------
276
Ravikiran G Thirumalai2584e512009-03-31 15:21:26 -0700277What: Ability for non root users to shm_get hugetlb pages based on mlock
278 resource limits
279When: 2.6.31
280Why: Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or
281 have CAP_IPC_LOCK to be able to allocate shm segments backed by
282 huge pages. The mlock based rlimit check to allow shm hugetlb is
283 inconsistent with mmap based allocations. Hence it is being
284 deprecated.
285Who: Ravikiran Thirumalai <kiran@scalex86.org>
286
287---------------------------
288
Rene Herman16d75232008-06-24 19:38:56 +0200289What: CONFIG_THERMAL_HWMON
290When: January 2009
291Why: This option was introduced just to allow older lm-sensors userspace
292 to keep working over the upgrade to 2.6.26. At the scheduled time of
293 removal fixed lm-sensors (2.x or 3.x) should be readily available.
294Who: Rene Herman <rene.herman@gmail.com>
Johannes Berg22bb1be2008-07-10 11:16:47 +0200295
296---------------------------
297
298What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS
299 (in net/core/net-sysfs.c)
300When: After the only user (hal) has seen a release with the patches
301 for enough time, probably some time in 2010.
302Why: Over 1K .text/.data size reduction, data is available in other
303 ways (ioctls)
304Who: Johannes Berg <johannes@sipsolutions.net>
Krzysztof Piotr Oledzki58401572008-07-21 10:01:34 -0700305
306---------------------------
307
Dave Jones753b7ae2009-03-09 15:14:37 -0400308What: sysfs ui for changing p4-clockmod parameters
309When: September 2009
310Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and
311 e088e4c9cdb618675874becb91b2fd581ee707e6.
312 Removal is subject to fixing any remaining bugs in ACPI which may
313 cause the thermal throttling not to happen at the right time.
314Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>
Thomas Gleixner0e57aa12009-03-13 14:34:05 +0100315
316-----------------------------
317
318What: __do_IRQ all in one fits nothing interrupt handler
319When: 2.6.32
320Why: __do_IRQ was kept for easy migration to the type flow handlers.
321 More than two years of migration time is enough.
322Who: Thomas Gleixner <tglx@linutronix.de>
Thomas Gleixnercb065c02009-03-13 14:40:27 +0100323
324-----------------------------
325
Alex Chiangf110ca42009-03-20 14:56:56 -0600326What: fakephp and associated sysfs files in /sys/bus/pci/slots/
327When: 2011
328Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
329 represent a machine's physical PCI slots. The change in semantics
330 had userspace implications, as the hotplug core no longer allowed
331 drivers to create multiple sysfs files per physical slot (required
332 for multi-function devices, e.g.). fakephp was seen as a developer's
333 tool only, and its interface changed. Too late, we learned that
334 there were some users of the fakephp interface.
335
336 In 2.6.30, the original fakephp interface was restored. At the same
337 time, the PCI core gained the ability that fakephp provided, namely
338 function-level hot-remove and hot-add.
339
340 Since the PCI core now provides the same functionality, exposed in:
341
342 /sys/bus/pci/rescan
343 /sys/bus/pci/devices/.../remove
344 /sys/bus/pci/devices/.../rescan
345
346 there is no functional reason to maintain fakephp as well.
347
348 We will keep the existing module so that 'modprobe fakephp' will
349 present the old /sys/bus/pci/slots/... interface for compatibility,
350 but users are urged to migrate their applications to the API above.
351
352 After a reasonable transition period, we will remove the legacy
353 fakephp interface.
354Who: Alex Chiang <achiang@hp.com>
Jean Delvare3f307fb2009-04-13 17:02:13 +0200355
356---------------------------
357
Johannes Bergc64fb012009-06-02 13:01:38 +0200358What: CONFIG_RFKILL_INPUT
359When: 2.6.33
360Why: Should be implemented in userspace, policy daemon.
361Who: Johannes Berg <johannes@sipsolutions.net>
David S. Miller9cbc1cb2009-06-15 03:02:23 -0700362
Andi Kleen45f458e2009-04-28 23:18:26 +0200363----------------------------
364
Tejun Heo93fe4482009-08-06 18:14:26 +0900365What: sound-slot/service-* module aliases and related clutters in
366 sound/sound_core.c
367When: August 2010
368Why: OSS sound_core grabs all legacy minors (0-255) of SOUND_MAJOR
369 (14) and requests modules using custom sound-slot/service-*
370 module aliases. The only benefit of doing this is allowing
371 use of custom module aliases which might as well be considered
372 a bug at this point. This preemptive claiming prevents
373 alternative OSS implementations.
374
375 Till the feature is removed, the kernel will be requesting
376 both sound-slot/service-* and the standard char-major-* module
377 aliases and allow turning off the pre-claiming selectively via
378 CONFIG_SOUND_OSS_CORE_PRECLAIM and soundcore.preclaim_oss
379 kernel parameter.
380
381 After the transition phase is complete, both the custom module
382 aliases and switches to disable it will go away. This removal
383 will also allow making ALSA OSS emulation independent of
384 sound_core. The dependency will be broken then too.
385Who: Tejun Heo <tj@kernel.org>
Alok Katariad0153ca2009-09-29 10:25:24 -0700386
387----------------------------
388
389What: Support for VMware's guest paravirtuliazation technique [VMI] will be
390 dropped.
391When: 2.6.37 or earlier.
392Why: With the recent innovations in CPU hardware acceleration technologies
393 from Intel and AMD, VMware ran a few experiments to compare these
394 techniques to guest paravirtualization technique on VMware's platform.
395 These hardware assisted virtualization techniques have outperformed the
396 performance benefits provided by VMI in most of the workloads. VMware
397 expects that these hardware features will be ubiquitous in a couple of
398 years, as a result, VMware has started a phased retirement of this
399 feature from the hypervisor. We will be removing this feature from the
400 Kernel too. Right now we are targeting 2.6.37 but can retire earlier if
401 technical reasons (read opportunity to remove major chunk of pvops)
402 arise.
403
404 Please note that VMI has always been an optimization and non-VMI kernels
405 still work fine on VMware's platform.
406 Latest versions of VMware's product which support VMI are,
407 Workstation 7.0 and VSphere 4.0 on ESX side, future maintainence
408 releases for these products will continue supporting VMI.
409
410 For more details about VMI retirement take a look at this,
411 http://blogs.vmware.com/guestosguide/2009/09/vmi-retirement.html
412
413Who: Alok N Kataria <akataria@vmware.com>
414
415----------------------------
Jean Delvareb180d052009-12-09 20:36:02 +0100416
Corentin Chary728900f2009-12-03 07:45:17 +0000417What: Support for lcd_switch and display_get in asus-laptop driver
418When: March 2010
419Why: These two features use non-standard interfaces. There are the
420 only features that really need multiple path to guess what's
421 the right method name on a specific laptop.
422
423 Removing them will allow to remove a lot of code an significantly
424 clean the drivers.
425
426 This will affect the backlight code which won't be able to know
427 if the backlight is on or off. The platform display file will also be
428 write only (like the one in eeepc-laptop).
429
430 This should'nt affect a lot of user because they usually know
431 when their display is on or off.
432
433Who: Corentin Chary <corentin.chary@gmail.com>
434
435----------------------------
Hans de Goedeceafe1d2010-01-11 10:50:53 -0200436
florian@mickler.org69c86372010-02-24 12:05:16 +0100437What: sysfs-class-rfkill state file
438When: Feb 2014
439Files: net/rfkill/core.c
440Why: Documented as obsolete since Feb 2010. This file is limited to 3
441 states while the rfkill drivers can have 4 states.
442Who: anybody or Florian Mickler <florian@mickler.org>
443
444----------------------------
445
446What: sysfs-class-rfkill claim file
447When: Feb 2012
448Files: net/rfkill/core.c
449Why: It is not possible to claim an rfkill driver since 2007. This is
450 Documented as obsolete since Feb 2010.
451Who: anybody or Florian Mickler <florian@mickler.org>
452
453----------------------------
454
Jan Kiszka79e95f42010-02-08 10:12:44 +0000455What: capifs
456When: February 2011
457Files: drivers/isdn/capi/capifs.*
458Why: udev fully replaces this special file system that only contains CAPI
459 NCCI TTY device nodes. User space (pppdcapiplugin) works without
460 noticing the difference.
461Who: Jan Kiszka <jan.kiszka@web.de>
Linus Torvaldsc812a512010-03-05 13:12:34 -0800462
463----------------------------
464
Avi Kivitydb358792010-01-26 16:30:06 +0200465What: KVM paravirt mmu host support
466When: January 2011
467Why: The paravirt mmu host support is slower than non-paravirt mmu, both
468 on newer and older hardware. It is already not exposed to the guest,
469 and kept only for live migration purposes.
470Who: Avi Kivity <avi@redhat.com>
Linus Torvaldsc812a512010-03-05 13:12:34 -0800471
472----------------------------
Len Brown4c81ba42010-03-14 16:28:46 -0400473
Wey-Yi Guy2b068612010-03-22 09:17:39 -0700474What: iwlwifi 50XX module parameters
475When: 2.6.40
476Why: The "..50" modules parameters were used to configure 5000 series and
477 up devices; different set of module parameters also available for 4965
478 with same functionalities. Consolidate both set into single place
479 in drivers/net/wireless/iwlwifi/iwl-agn.c
480
481Who: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Wey-Yi Guyd34a5a62010-03-23 10:17:03 -0700482
483----------------------------
484
485What: iwl4965 alias support
486When: 2.6.40
487Why: Internal alias support has been present in module-init-tools for some
488 time, the MODULE_ALIAS("iwl4965") boilerplate aliases can be removed
489 with no impact.
490
491Who: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Patrick McHardy62910552010-04-20 16:02:01 +0200492
Jan Engelhardt0cb47ea2010-03-16 18:25:12 +0100493---------------------------
494
495What: xt_NOTRACK
496Files: net/netfilter/xt_NOTRACK.c
497When: April 2011
498Why: Superseded by xt_CT
499Who: Netfilter developer team <netfilter-devel@vger.kernel.org>
David S. Miller278554b2010-05-12 00:05:35 -0700500
501---------------------------
502
Hans Verkuilb75396a2010-03-22 05:43:08 -0300503What: video4linux /dev/vtx teletext API support
504When: 2.6.35
505Files: drivers/media/video/saa5246a.c drivers/media/video/saa5249.c
506 include/linux/videotext.h
507Why: The vtx device nodes have been superseded by vbi device nodes
508 for many years. No applications exist that use the vtx support.
509 Of the two i2c drivers that actually support this API the saa5249
510 has been impossible to use for a year now and no known hardware
511 that supports this device exists. The saa5246a is theoretically
512 supported by the old mxb boards, but it never actually worked.
513
514 In summary: there is no hardware that can use this API and there
515 are no applications actually implementing this API.
516
517 The vtx support still reserves minors 192-223 and we would really
518 like to reuse those for upcoming new functionality. In the unlikely
519 event that new hardware appears that wants to use the functionality
520 provided by the vtx API, then that functionality should be build
521 around the sliced VBI API instead.
522Who: Hans Verkuil <hverkuil@xs4all.nl>
Linus Torvalds6e0b7b22010-05-19 17:09:40 -0700523
524----------------------------
525
Thomas Gleixner6932bf32010-03-26 00:06:55 +0000526What: IRQF_DISABLED
527When: 2.6.36
528Why: The flag is a NOOP as we run interrupt handlers with interrupts disabled
529Who: Thomas Gleixner <tglx@linutronix.de>
Linus Torvalds6e0b7b22010-05-19 17:09:40 -0700530
531----------------------------
532
Stefan Richter30144202010-05-24 21:31:23 +0200533What: old ieee1394 subsystem (CONFIG_IEEE1394)
534When: 2.6.37
535Files: drivers/ieee1394/ except init_ohci1394_dma.c
536Why: superseded by drivers/firewire/ (CONFIG_FIREWIRE) which offers more
537 features, better performance, and better security, all with smaller
538 and more modern code base
539Who: Stefan Richter <stefanr@s5r6.in-berlin.de>
Linus Torvalds55ddf142010-05-27 10:22:06 -0700540
541----------------------------
542
Rafael J. Wysocki72ad5d72010-07-23 22:59:09 +0200543What: The acpi_sleep=s4_nonvs command line option
544When: 2.6.37
545Files: arch/x86/kernel/acpi/sleep.c
546Why: superseded by acpi_sleep=nonvs
547Who: Rafael J. Wysocki <rjw@sisk.pl>
548
549----------------------------
FUJITA Tomonori17583362010-08-10 18:03:26 -0700550
551What: PCI DMA unmap state API
552When: August 2012
553Why: PCI DMA unmap state API (include/linux/pci-dma.h) was replaced
554 with DMA unmap state API (DMA unmap state API can be used for
555 any bus).
556Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
557
558----------------------------
FUJITA Tomonoria35274c2010-08-10 18:03:26 -0700559
560What: DMA_xxBIT_MASK macros
561When: Jun 2011
562Why: DMA_xxBIT_MASK macros were replaced with DMA_BIT_MASK() macros.
563Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
564
565----------------------------
566