diff options
Diffstat (limited to 'Documentation/feature-removal-schedule.txt')
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 280 |
1 files changed, 151 insertions, 129 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 0a46833c1b76..842aa9de84a6 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -6,21 +6,6 @@ be removed from this file. --------------------------- -What: USER_SCHED -When: 2.6.34 - -Why: USER_SCHED was implemented as a proof of concept for group scheduling. - The effect of USER_SCHED can already be achieved from userspace with - the help of libcgroup. The removal of USER_SCHED will also simplify - the scheduler code with the removal of one major ifdef. There are also - issues USER_SCHED has with USER_NS. A decision was taken not to fix - those and instead remove USER_SCHED. Also new group scheduling - features will not be implemented for USER_SCHED. - -Who: Dhaval Giani <dhaval@linux.vnet.ibm.com> - ---------------------------- - What: PRISM54 When: 2.6.34 @@ -64,6 +49,17 @@ Who: Robin Getz <rgetz@blackfin.uclinux.org> & Matt Mackall <mpm@selenic.com> --------------------------- +What: Deprecated snapshot ioctls +When: 2.6.36 + +Why: The ioctls in kernel/power/user.c were marked as deprecated long time + ago. Now they notify users about that so that they need to replace + their userspace. After some more time, remove them completely. + +Who: Jiri Slaby <jirislaby@gmail.com> + +--------------------------- + What: The ieee80211_regdom module parameter When: March 2010 / desktop catchup @@ -88,27 +84,6 @@ Who: Luis R. Rodriguez <lrodriguez@atheros.com> --------------------------- -What: CONFIG_WIRELESS_OLD_REGULATORY - old static regulatory information -When: March 2010 / desktop catchup - -Why: The old regulatory infrastructure has been replaced with a new one - which does not require statically defined regulatory domains. We do - not want to keep static regulatory domains in the kernel due to the - the dynamic nature of regulatory law and localization. We kept around - the old static definitions for the regulatory domains of: - - * US - * JP - * EU - - and used by default the US when CONFIG_WIRELESS_OLD_REGULATORY was - set. We will remove this option once the standard Linux desktop catches - up with the new userspace APIs we have implemented. - -Who: Luis R. Rodriguez <lrodriguez@atheros.com> - ---------------------------- - What: dev->power.power_state When: July 2007 Why: Broken design for runtime control over driver power states, confusing @@ -118,7 +93,7 @@ Why: Broken design for runtime control over driver power states, confusing inputs. This framework was never widely used, and most attempts to use it were broken. Drivers should instead be exposing domain-specific interfaces either to kernel or to userspace. -Who: Pavel Machek <pavel@suse.cz> +Who: Pavel Machek <pavel@ucw.cz> --------------------------- @@ -141,23 +116,6 @@ Who: Mauro Carvalho Chehab <mchehab@infradead.org> --------------------------- -What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl]) -When: November 2005 -Files: drivers/pcmcia/: pcmcia_ioctl.c -Why: With the 16-bit PCMCIA subsystem now behaving (almost) like a - normal hotpluggable bus, and with it using the default kernel - infrastructure (hotplug, driver core, sysfs) keeping the PCMCIA - control ioctl needed by cardmgr and cardctl from pcmcia-cs is - unnecessary, and makes further cleanups and integration of the - PCMCIA subsystem into the Linux kernel device driver model more - difficult. The features provided by cardmgr and cardctl are either - handled by the kernel itself now or are available in the new - pcmciautils package available at - http://kernel.org/pub/linux/utils/kernel/pcmcia/ -Who: Dominik Brodowski <linux@brodo.de> - ---------------------------- - What: sys_sysctl When: September 2010 Option: CONFIG_SYSCTL_SYSCALL @@ -193,6 +151,31 @@ Who: Eric Biederman <ebiederm@xmission.com> --------------------------- +What: /proc/<pid>/oom_adj +When: August 2012 +Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's + badness heuristic used to determine which task to kill when the kernel + is out of memory. + + The badness heuristic has since been rewritten since the introduction of + this tunable such that its meaning is deprecated. The value was + implemented as a bitshift on a score generated by the badness() + function that did not have any precise units of measure. With the + rewrite, the score is given as a proportion of available memory to the + task allocating pages, so using a bitshift which grows the score + exponentially is, thus, impossible to tune with fine granularity. + + A much more powerful interface, /proc/<pid>/oom_score_adj, was + introduced with the oom killer rewrite that allows users to increase or + decrease the badness() score linearly. This interface will replace + /proc/<pid>/oom_adj. + + A warning will be emitted to the kernel log if an application uses this + deprecated interface. After it is printed once, future warnings will be + suppressed until the kernel is rebooted. + +--------------------------- + What: remove EXPORT_SYMBOL(kernel_thread) When: August 2006 Files: arch/*/kernel/*_ksyms.c @@ -260,16 +243,6 @@ Who: Thomas Gleixner <tglx@linutronix.de> --------------------------- -What (Why): - - xt_recent: the old ipt_recent proc dir - (superseded by /proc/net/xt_recent) - -When: January 2009 or Linux 2.7.0, whichever comes first -Why: Superseded by newer revisions or modules -Who: Jan Engelhardt <jengelh@computergmbh.de> - ---------------------------- - What: GPIO autorequest on gpio_direction_{input,output}() in gpiolib When: February 2010 Why: All callers should use explicit gpio_request()/gpio_free(). @@ -332,15 +305,6 @@ Who: Johannes Berg <johannes@sipsolutions.net> --------------------------- -What: CONFIG_NF_CT_ACCT -When: 2.6.29 -Why: Accounting can now be enabled/disabled without kernel recompilation. - Currently used only to set a default value for a feature that is also - controlled by a kernel/module/sysfs/sysctl parameter. -Who: Krzysztof Piotr Oledzki <ole@ans.pl> - ---------------------------- - What: sysfs ui for changing p4-clockmod parameters When: September 2009 Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and @@ -396,24 +360,6 @@ When: 2.6.33 Why: Should be implemented in userspace, policy daemon. Who: Johannes Berg <johannes@sipsolutions.net> ---------------------------- - -What: CONFIG_INOTIFY -When: 2.6.33 -Why: last user (audit) will be converted to the newer more generic - and more easily maintained fsnotify subsystem -Who: Eric Paris <eparis@redhat.com> - ----------------------------- - -What: lock_policy_rwsem_* and unlock_policy_rwsem_* will not be - exported interface anymore. -When: 2.6.33 -Why: cpu_policy_rwsem has a new cleaner definition making it local to - cpufreq core and contained inside cpufreq.c. Other dependent - drivers should not use it in order to safely avoid lockdep issues. -Who: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> - ---------------------------- What: sound-slot/service-* module aliases and related clutters in @@ -468,12 +414,6 @@ Who: Alok N Kataria <akataria@vmware.com> ---------------------------- -What: adt7473 hardware monitoring driver -When: February 2010 -Why: Obsoleted by the adt7475 driver. -Who: Jean Delvare <khali@linux-fr.org> - ---------------------------- What: Support for lcd_switch and display_get in asus-laptop driver When: March 2010 Why: These two features use non-standard interfaces. There are the @@ -494,51 +434,133 @@ Who: Corentin Chary <corentin.chary@gmail.com> ---------------------------- -What: usbvideo quickcam_messenger driver -When: 2.6.35 -Files: drivers/media/video/usbvideo/quickcam_messenger.[ch] -Why: obsolete v4l1 driver replaced by gspca_stv06xx -Who: Hans de Goede <hdegoede@redhat.com> +What: sysfs-class-rfkill state file +When: Feb 2014 +Files: net/rfkill/core.c +Why: Documented as obsolete since Feb 2010. This file is limited to 3 + states while the rfkill drivers can have 4 states. +Who: anybody or Florian Mickler <florian@mickler.org> ---------------------------- -What: ov511 v4l1 driver -When: 2.6.35 -Files: drivers/media/video/ov511.[ch] -Why: obsolete v4l1 driver replaced by gspca_ov519 -Who: Hans de Goede <hdegoede@redhat.com> +What: sysfs-class-rfkill claim file +When: Feb 2012 +Files: net/rfkill/core.c +Why: It is not possible to claim an rfkill driver since 2007. This is + Documented as obsolete since Feb 2010. +Who: anybody or Florian Mickler <florian@mickler.org> ---------------------------- -What: w9968cf v4l1 driver -When: 2.6.35 -Files: drivers/media/video/w9968cf*.[ch] -Why: obsolete v4l1 driver replaced by gspca_ov519 -Who: Hans de Goede <hdegoede@redhat.com> +What: capifs +When: February 2011 +Files: drivers/isdn/capi/capifs.* +Why: udev fully replaces this special file system that only contains CAPI + NCCI TTY device nodes. User space (pppdcapiplugin) works without + noticing the difference. +Who: Jan Kiszka <jan.kiszka@web.de> ---------------------------- -What: ovcamchip sensor framework -When: 2.6.35 -Files: drivers/media/video/ovcamchip/* -Why: Only used by obsoleted v4l1 drivers -Who: Hans de Goede <hdegoede@redhat.com> +What: KVM paravirt mmu host support +When: January 2011 +Why: The paravirt mmu host support is slower than non-paravirt mmu, both + on newer and older hardware. It is already not exposed to the guest, + and kept only for live migration purposes. +Who: Avi Kivity <avi@redhat.com> ---------------------------- -What: stv680 v4l1 driver -When: 2.6.35 -Files: drivers/media/video/stv680.[ch] -Why: obsolete v4l1 driver replaced by gspca_stv0680 -Who: Hans de Goede <hdegoede@redhat.com> +What: iwlwifi 50XX module parameters +When: 2.6.40 +Why: The "..50" modules parameters were used to configure 5000 series and + up devices; different set of module parameters also available for 4965 + with same functionalities. Consolidate both set into single place + in drivers/net/wireless/iwlwifi/iwl-agn.c + +Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> ---------------------------- -What: zc0301 v4l driver +What: iwl4965 alias support +When: 2.6.40 +Why: Internal alias support has been present in module-init-tools for some + time, the MODULE_ALIAS("iwl4965") boilerplate aliases can be removed + with no impact. + +Who: Wey-Yi Guy <wey-yi.w.guy@intel.com> + +--------------------------- + +What: xt_NOTRACK +Files: net/netfilter/xt_NOTRACK.c +When: April 2011 +Why: Superseded by xt_CT +Who: Netfilter developer team <netfilter-devel@vger.kernel.org> + +--------------------------- + +What: video4linux /dev/vtx teletext API support When: 2.6.35 -Files: drivers/media/video/zc0301/* -Why: Duplicate functionality with the gspca_zc3xx driver, zc0301 only - supports 2 USB-ID's (because it only supports a limited set of - sensors) wich are also supported by the gspca_zc3xx driver - (which supports 53 USB-ID's in total) -Who: Hans de Goede <hdegoede@redhat.com> +Files: drivers/media/video/saa5246a.c drivers/media/video/saa5249.c + include/linux/videotext.h +Why: The vtx device nodes have been superseded by vbi device nodes + for many years. No applications exist that use the vtx support. + Of the two i2c drivers that actually support this API the saa5249 + has been impossible to use for a year now and no known hardware + that supports this device exists. The saa5246a is theoretically + supported by the old mxb boards, but it never actually worked. + + In summary: there is no hardware that can use this API and there + are no applications actually implementing this API. + + The vtx support still reserves minors 192-223 and we would really + like to reuse those for upcoming new functionality. In the unlikely + event that new hardware appears that wants to use the functionality + provided by the vtx API, then that functionality should be build + around the sliced VBI API instead. +Who: Hans Verkuil <hverkuil@xs4all.nl> + +---------------------------- + +What: IRQF_DISABLED +When: 2.6.36 +Why: The flag is a NOOP as we run interrupt handlers with interrupts disabled +Who: Thomas Gleixner <tglx@linutronix.de> + +---------------------------- + +What: old ieee1394 subsystem (CONFIG_IEEE1394) +When: 2.6.37 +Files: drivers/ieee1394/ except init_ohci1394_dma.c +Why: superseded by drivers/firewire/ (CONFIG_FIREWIRE) which offers more + features, better performance, and better security, all with smaller + and more modern code base +Who: Stefan Richter <stefanr@s5r6.in-berlin.de> + +---------------------------- + +What: The acpi_sleep=s4_nonvs command line option +When: 2.6.37 +Files: arch/x86/kernel/acpi/sleep.c +Why: superseded by acpi_sleep=nonvs +Who: Rafael J. Wysocki <rjw@sisk.pl> + +---------------------------- + +What: PCI DMA unmap state API +When: August 2012 +Why: PCI DMA unmap state API (include/linux/pci-dma.h) was replaced + with DMA unmap state API (DMA unmap state API can be used for + any bus). +Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> + +---------------------------- + +What: DMA_xxBIT_MASK macros +When: Jun 2011 +Why: DMA_xxBIT_MASK macros were replaced with DMA_BIT_MASK() macros. +Who: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> + +---------------------------- + |