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cc2cccaec8
Since wext is being replaced as fast as we can (it'll probably stick around for legacy drivers though) and the wext/netlink stuff was never really used, this schedules it for removal. The removal schedule is tight but there are no users of the code, the main user of the wext user interface are the wireless-tools, they only have an alpha version using the netlink interface and even that is incomplete. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
319 lines
12 KiB
Plaintext
319 lines
12 KiB
Plaintext
The following is a list of files and features that are going to be
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removed in the kernel source tree. Every entry should contain what
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exactly is going away, why it is happening, and who is going to be doing
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the work. When the feature is removed from the kernel, it should also
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be removed from this file.
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---------------------------
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What: /sys/devices/.../power/state
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dev->power.power_state
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dpm_runtime_{suspend,resume)()
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When: July 2007
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Why: Broken design for runtime control over driver power states, confusing
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driver-internal runtime power management with: mechanisms to support
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system-wide sleep state transitions; event codes that distinguish
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different phases of swsusp "sleep" transitions; and userspace policy
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inputs. This framework was never widely used, and most attempts to
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use it were broken. Drivers should instead be exposing domain-specific
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interfaces either to kernel or to userspace.
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Who: Pavel Machek <pavel@suse.cz>
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---------------------------
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What: RAW driver (CONFIG_RAW_DRIVER)
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When: December 2005
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Why: declared obsolete since kernel 2.6.3
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O_DIRECT can be used instead
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Who: Adrian Bunk <bunk@stusta.de>
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---------------------------
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What: raw1394: requests of type RAW1394_REQ_ISO_SEND, RAW1394_REQ_ISO_LISTEN
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When: June 2007
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Why: Deprecated in favour of the more efficient and robust rawiso interface.
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Affected are applications which use the deprecated part of libraw1394
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(raw1394_iso_write, raw1394_start_iso_write, raw1394_start_iso_rcv,
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raw1394_stop_iso_rcv) or bypass libraw1394.
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Who: Dan Dennedy <dan@dennedy.org>, Stefan Richter <stefanr@s5r6.in-berlin.de>
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---------------------------
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What: dv1394 driver (CONFIG_IEEE1394_DV1394)
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When: June 2007
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Why: Replaced by raw1394 + userspace libraries, notably libiec61883. This
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shift of application support has been indicated on www.linux1394.org
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and developers' mailinglists for quite some time. Major applications
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have been converted, with the exception of ffmpeg and hence xine.
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Piped output of dvgrab2 is a partial equivalent to dv1394.
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Who: Dan Dennedy <dan@dennedy.org>, Stefan Richter <stefanr@s5r6.in-berlin.de>
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---------------------------
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What: Video4Linux API 1 ioctls and video_decoder.h from Video devices.
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When: December 2006
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Why: V4L1 AP1 was replaced by V4L2 API. during migration from 2.4 to 2.6
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series. The old API have lots of drawbacks and don't provide enough
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means to work with all video and audio standards. The newer API is
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already available on the main drivers and should be used instead.
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Newer drivers should use v4l_compat_translate_ioctl function to handle
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old calls, replacing to newer ones.
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Decoder iocts are using internally to allow video drivers to
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communicate with video decoders. This should also be improved to allow
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V4L2 calls being translated into compatible internal ioctls.
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Who: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
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---------------------------
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What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
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When: November 2005
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Files: drivers/pcmcia/: pcmcia_ioctl.c
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Why: With the 16-bit PCMCIA subsystem now behaving (almost) like a
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normal hotpluggable bus, and with it using the default kernel
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infrastructure (hotplug, driver core, sysfs) keeping the PCMCIA
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control ioctl needed by cardmgr and cardctl from pcmcia-cs is
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unnecessary, and makes further cleanups and integration of the
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PCMCIA subsystem into the Linux kernel device driver model more
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difficult. The features provided by cardmgr and cardctl are either
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handled by the kernel itself now or are available in the new
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pcmciautils package available at
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http://kernel.org/pub/linux/utils/kernel/pcmcia/
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Who: Dominik Brodowski <linux@brodo.de>
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---------------------------
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What: remove EXPORT_SYMBOL(kernel_thread)
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When: August 2006
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Files: arch/*/kernel/*_ksyms.c
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Why: kernel_thread is a low-level implementation detail. Drivers should
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use the <linux/kthread.h> API instead which shields them from
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implementation details and provides a higherlevel interface that
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prevents bugs and code duplication
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Who: Christoph Hellwig <hch@lst.de>
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---------------------------
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What: CONFIG_FORCED_INLINING
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When: June 2006
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Why: Config option is there to see if gcc is good enough. (in january
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2006). If it is, the behavior should just be the default. If it's not,
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the option should just go away entirely.
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Who: Arjan van de Ven
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---------------------------
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What: eepro100 network driver
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When: January 2007
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Why: replaced by the e100 driver
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Who: Adrian Bunk <bunk@stusta.de>
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---------------------------
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What: drivers depending on OSS_OBSOLETE_DRIVER
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When: options in 2.6.20, code in 2.6.22
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Why: OSS drivers with ALSA replacements
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Who: Adrian Bunk <bunk@stusta.de>
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---------------------------
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What: pci_module_init(driver)
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When: January 2007
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Why: Is replaced by pci_register_driver(pci_driver).
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Who: Richard Knutsson <ricknu-0@student.ltu.se> and Greg Kroah-Hartman <gregkh@suse.de>
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---------------------------
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What: Usage of invalid timevals in setitimer
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When: March 2007
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Why: POSIX requires to validate timevals in the setitimer call. This
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was never done by Linux. The invalid (e.g. negative timevals) were
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silently converted to more or less random timeouts and intervals.
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Until the removal a per boot limited number of warnings is printed
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and the timevals are sanitized.
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Who: Thomas Gleixner <tglx@linutronix.de>
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---------------------------
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What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
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(temporary transition config option provided until then)
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The transition config option will also be removed at the same time.
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When: before 2.6.19
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Why: Unused symbols are both increasing the size of the kernel binary
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and are often a sign of "wrong API"
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Who: Arjan van de Ven <arjan@linux.intel.com>
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---------------------------
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What: mount/umount uevents
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When: February 2007
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Why: These events are not correct, and do not properly let userspace know
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when a file system has been mounted or unmounted. Userspace should
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poll the /proc/mounts file instead to detect this properly.
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Who: Greg Kroah-Hartman <gregkh@suse.de>
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---------------------------
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What: USB driver API moves to EXPORT_SYMBOL_GPL
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When: February 2008
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Files: include/linux/usb.h, drivers/usb/core/driver.c
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Why: The USB subsystem has changed a lot over time, and it has been
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possible to create userspace USB drivers using usbfs/libusb/gadgetfs
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that operate as fast as the USB bus allows. Because of this, the USB
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subsystem will not be allowing closed source kernel drivers to
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register with it, after this grace period is over. If anyone needs
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any help in converting their closed source drivers over to use the
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userspace filesystems, please contact the
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linux-usb-devel@lists.sourceforge.net mailing list, and the developers
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there will be glad to help you out.
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Who: Greg Kroah-Hartman <gregkh@suse.de>
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---------------------------
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What: Interrupt only SA_* flags
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When: Januar 2007
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Why: The interrupt related SA_* flags are replaced by IRQF_* to move them
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out of the signal namespace.
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Who: Thomas Gleixner <tglx@linutronix.de>
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---------------------------
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What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
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When: October 2008
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Why: The stacking of class devices makes these values misleading and
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inconsistent.
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Class devices should not carry any of these properties, and bus
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devices have SUBSYTEM and DRIVER as a replacement.
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Who: Kay Sievers <kay.sievers@suse.de>
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---------------------------
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What: i2c-isa
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When: December 2006
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Why: i2c-isa is a non-sense and doesn't fit in the device driver
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model. Drivers relying on it are better implemented as platform
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drivers.
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Who: Jean Delvare <khali@linux-fr.org>
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---------------------------
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What: i2c_adapter.dev
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i2c_adapter.list
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When: July 2007
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Why: Superfluous, given i2c_adapter.class_dev:
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* The "dev" was a stand-in for the physical device node that legacy
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drivers would not have; but now it's almost always present. Any
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remaining legacy drivers must upgrade (they now trigger warnings).
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* The "list" duplicates class device children.
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The delay in removing this is so upgraded lm_sensors and libsensors
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can get deployed. (Removal causes minor changes in the sysfs layout,
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notably the location of the adapter type name and parenting the i2c
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client hardware directly from their controller.)
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Who: Jean Delvare <khali@linux-fr.org>,
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David Brownell <dbrownell@users.sourceforge.net>
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---------------------------
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What: drivers depending on OBSOLETE_OSS
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When: options in 2.6.22, code in 2.6.24
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Why: OSS drivers with ALSA replacements
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Who: Adrian Bunk <bunk@stusta.de>
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---------------------------
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What: IPv4 only connection tracking/NAT/helpers
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When: 2.6.22
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Why: The new layer 3 independant connection tracking replaces the old
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IPv4 only version. After some stabilization of the new code the
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old one will be removed.
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Who: Patrick McHardy <kaber@trash.net>
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---------------------------
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What: ACPI hooks (X86_SPEEDSTEP_CENTRINO_ACPI) in speedstep-centrino driver
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When: December 2006
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Why: Speedstep-centrino driver with ACPI hooks and acpi-cpufreq driver are
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functionally very much similar. They talk to ACPI in same way. Only
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difference between them is the way they do frequency transitions.
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One uses MSRs and the other one uses IO ports. Functionaliy of
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speedstep_centrino with ACPI hooks is now merged into acpi-cpufreq.
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That means one common driver will support all Intel Enhanced Speedstep
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capable CPUs. That means less confusion over name of
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speedstep-centrino driver (with that driver supposed to be used on
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non-centrino platforms). That means less duplication of code and
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less maintenance effort and no possibility of these two drivers
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going out of sync.
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Current users of speedstep_centrino with ACPI hooks are requested to
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switch over to acpi-cpufreq driver. speedstep-centrino will continue
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to work using older non-ACPI static table based scheme even after this
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date.
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Who: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
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---------------------------
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What: /sys/firmware/acpi/namespace
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When: 2.6.21
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Why: The ACPI namespace is effectively the symbol list for
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the BIOS. The device names are completely arbitrary
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and have no place being exposed to user-space.
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For those interested in the BIOS ACPI namespace,
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the BIOS can be extracted and disassembled with acpidump
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and iasl as documented in the pmtools package here:
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http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/utils
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Who: Len Brown <len.brown@intel.com>
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---------------------------
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What: ACPI procfs interface
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When: July 2007
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Why: After ACPI sysfs conversion, ACPI attributes will be duplicated
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in sysfs and the ACPI procfs interface should be removed.
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Who: Zhang Rui <rui.zhang@intel.com>
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---------------------------
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What: /proc/acpi/button
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When: August 2007
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Why: /proc/acpi/button has been replaced by events to the input layer
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since 2.6.20.
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Who: Len Brown <len.brown@intel.com>
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---------------------------
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What: sk98lin network driver
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When: July 2007
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Why: In kernel tree version of driver is unmaintained. Sk98lin driver
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replaced by the skge driver.
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Who: Stephen Hemminger <shemminger@osdl.org>
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---------------------------
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What: Compaq touchscreen device emulation
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When: Oct 2007
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Files: drivers/input/tsdev.c
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Why: The code says it was obsolete when it was written in 2001.
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tslib is a userspace library which does anything tsdev can do and
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much more besides in userspace where this code belongs. There is no
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longer any need for tsdev and applications should have converted to
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use tslib by now.
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The name "tsdev" is also extremely confusing and lots of people have
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it loaded when they don't need/use it.
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Who: Richard Purdie <rpurdie@rpsys.net>
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---------------------------
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What: Wireless extensions over netlink (CONFIG_NET_WIRELESS_RTNETLINK)
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When: with the merge of wireless-dev, 2.6.22 or later
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Why: The option/code is
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* not enabled on most kernels
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* not required by any userspace tools (except an experimental one,
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and even there only for some parts, others use ioctl)
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* pointless since wext is no longer evolving and the ioctl
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interface needs to be kept
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Who: Johannes Berg <johannes@sipsolutions.net>
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---------------------------
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