7d99b7d634
According to the specification the timevals must be validated and an errorcode -EINVAL returned in case the timevals are not in canonical form. This check was never done in Linux. The pre 2.6.16 code converted invalid timevals silently. Negative timeouts were converted by the timeval_to_jiffies conversion to the maximum timeout. hrtimers and the ktime_t operations expect timevals in canonical form. Otherwise random results might happen on 32 bits machines due to the optimized ktime_add/sub operations. Negative timeouts are treated as already expired. This might break applications which work on pre 2.6.16. To prevent random behaviour and API breakage the timevals are checked and invalid timevals sanitized in a simliar way as the pre 2.6.16 code did. Invalid timevals are reported with a per boot limited number of kernel messages so applications which use this misfeature can be corrected. After a grace period of one year the sanitizing should be replaced by a correct validation check. This is also documented in Documentation/feature-removal-schedule.txt The validation and sanitizing is done inside do_setitimer so all callers (sys_setitimer, compat_sys_setitimer, osf_setitimer) are catched. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
243 lines
8.7 KiB
Text
243 lines
8.7 KiB
Text
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: devfs
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When: July 2005
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Files: fs/devfs/*, include/linux/devfs_fs*.h and assorted devfs
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function calls throughout the kernel tree
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Why: It has been unmaintained for a number of years, has unfixable
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races, contains a naming policy within the kernel that is
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against the LSB, and can be replaced by using udev.
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Who: Greg Kroah-Hartman <greg@kroah.com>
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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: drivers depending on OBSOLETE_OSS_DRIVER
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When: January 2006
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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: RCU API moves to EXPORT_SYMBOL_GPL
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When: April 2006
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Files: include/linux/rcupdate.h, kernel/rcupdate.c
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Why: Outside of Linux, the only implementations of anything even
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vaguely resembling RCU that I am aware of are in DYNIX/ptx,
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VM/XA, Tornado, and K42. I do not expect anyone to port binary
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drivers or kernel modules from any of these, since the first two
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are owned by IBM and the last two are open-source research OSes.
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So these will move to GPL after a grace period to allow
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people, who might be using implementations that I am not aware
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of, to adjust to this upcoming change.
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Who: Paul E. McKenney <paulmck@us.ibm.com>
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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: November 2005
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Why: Deprecated in favour of the new ioctl-based rawiso interface, which is
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more efficient. You should really be using libraw1394 for raw1394
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access anyway.
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Who: Jody McIntyre <scjody@steamballoon.com>
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What: Video4Linux API 1 ioctls and video_decoder.h from Video devices.
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When: July 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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What: remove EXPORT_SYMBOL(panic_timeout)
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When: April 2006
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Files: kernel/panic.c
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Why: No modular usage in the kernel.
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Who: Adrian Bunk <bunk@stusta.de>
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What: remove EXPORT_SYMBOL(insert_resource)
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When: April 2006
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Files: kernel/resource.c
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Why: No modular usage in the kernel.
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Who: Adrian Bunk <bunk@stusta.de>
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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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What: ip_queue and ip6_queue (old ipv4-only and ipv6-only netfilter queue)
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When: December 2005
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Why: This interface has been obsoleted by the new layer3-independent
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"nfnetlink_queue". The Kernel interface is compatible, so the old
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ip[6]tables "QUEUE" targets still work and will transparently handle
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all packets into nfnetlink queue number 0. Userspace users will have
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to link against API-compatible library on top of libnfnetlink_queue
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instead of the current 'libipq'.
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Who: Harald Welte <laforge@netfilter.org>
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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: EXPORT_SYMBOL(lookup_hash)
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When: January 2006
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Why: Too low-level interface. Use lookup_one_len or lookup_create instead.
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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: START_ARRAY ioctl for md
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When: July 2006
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Files: drivers/md/md.c
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Why: Not reliable by design - can fail when most needed.
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Alternatives exist
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Who: NeilBrown <neilb@suse.de>
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---------------------------
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What: au1x00_uart driver
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When: January 2006
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Why: The 8250 serial driver now has the ability to deal with the differences
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between the standard 8250 family of UARTs and their slightly strange
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brother on Alchemy SOCs. The loss of features is not considered an
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issue.
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Who: Ralf Baechle <ralf@linux-mips.org>
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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: 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: I2C interface of the it87 driver
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When: January 2007
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Why: The ISA interface is faster and should be always available. The I2C
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probing is also known to cause trouble in at least one case (see
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bug #5889.)
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Who: Jean Delvare <khali@linux-fr.org>
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---------------------------
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What: remove EXPORT_SYMBOL(tasklist_lock)
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When: August 2006
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Files: kernel/fork.c
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Why: tasklist_lock protects the kernel internal task list. Modules have
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no business looking at it, and all instances in drivers have been due
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to use of too-lowlevel APIs. Having this symbol exported prevents
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moving to more scalable locking schemes for the task list.
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Who: Christoph Hellwig <hch@lst.de>
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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: Support for NEC DDB5074 and DDB5476 evaluation boards.
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When: June 2006
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Why: Board specific code doesn't build anymore since ~2.6.0 and no
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users have complained indicating there is no more need for these
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boards. This should really be considered a last call.
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Who: Ralf Baechle <ralf@linux-mips.org>
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---------------------------
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What: USB driver API moves to EXPORT_SYMBOL_GPL
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When: Febuary 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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