2005-04-16 22:20:36 +00:00
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|
|
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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|
2007-07-12 20:55:07 +00:00
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|
|
What: dev->power.power_state
|
2006-08-30 20:50:27 +00:00
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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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|
---------------------------
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|
2007-04-29 22:05:48 +00:00
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|
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What: old NCR53C9x driver
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When: October 2007
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Why: Replaced by the much better esp_scsi driver. Actual low-level
|
2007-05-13 20:48:31 +00:00
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|
|
driver can be ported over almost trivially.
|
2007-04-29 22:05:48 +00:00
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|
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Who: David Miller <davem@davemloft.net>
|
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Christoph Hellwig <hch@lst.de>
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|
|
---------------------------
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|
2005-11-09 05:38:53 +00:00
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|
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What: Video4Linux API 1 ioctls and video_decoder.h from Video devices.
|
2007-10-17 17:32:36 +00:00
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|
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When: December 2008
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|
Files: include/linux/video_decoder.h include/linux/videodev.h
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|
|
Check: include/linux/video_decoder.h include/linux/videodev.h
|
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|
|
Why: V4L1 AP1 was replaced by V4L2 API during migration from 2.4 to 2.6
|
2005-11-09 05:38:53 +00:00
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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.
|
2007-10-17 17:32:36 +00:00
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|
|
Compatibility ioctls will be provided, for a while, via
|
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|
|
v4l1-compat module.
|
|
|
|
|
Who: Mauro Carvalho Chehab <mchehab@infradead.org>
|
2005-11-09 05:38:53 +00:00
|
|
|
|
|
|
|
|
---------------------------
|
|
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|
|
2005-07-08 00:58:58 +00:00
|
|
|
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
|
|
|
|
|
normal hotpluggable bus, and with it using the default kernel
|
|
|
|
|
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
|
|
|
|
|
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
|
|
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|
|
http://kernel.org/pub/linux/utils/kernel/pcmcia/
|
|
|
|
|
Who: Dominik Brodowski <linux@brodo.de>
|
2005-08-10 02:44:15 +00:00
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2007-10-18 10:05:58 +00:00
|
|
|
What: sys_sysctl
|
|
|
|
|
When: September 2010
|
|
|
|
|
Option: CONFIG_SYSCTL_SYSCALL
|
|
|
|
|
Why: The same information is available in a more convenient from
|
|
|
|
|
/proc/sys, and none of the sysctl variables appear to be
|
|
|
|
|
important performance wise.
|
|
|
|
|
|
|
|
|
|
Binary sysctls are a long standing source of subtle kernel
|
|
|
|
|
bugs and security issues.
|
|
|
|
|
|
|
|
|
|
When I looked several months ago all I could find after
|
|
|
|
|
searching several distributions were 5 user space programs and
|
|
|
|
|
glibc (which falls back to /proc/sys) using this syscall.
|
|
|
|
|
|
|
|
|
|
The man page for sysctl(2) documents it as unusable for user
|
|
|
|
|
space programs.
|
|
|
|
|
|
|
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|
|
sysctl(2) is not generally ABI compatible to a 32bit user
|
|
|
|
|
space application on a 64bit and a 32bit kernel.
|
|
|
|
|
|
|
|
|
|
For the last several months the policy has been no new binary
|
|
|
|
|
sysctls and no one has put forward an argument to use them.
|
|
|
|
|
|
|
|
|
|
Binary sysctls issues seem to keep happening appearing so
|
|
|
|
|
properly deprecating them (with a warning to user space) and a
|
|
|
|
|
2 year grace warning period will mean eventually we can kill
|
|
|
|
|
them and end the pain.
|
|
|
|
|
|
|
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|
|
In the mean time individual binary sysctls can be dealt with
|
|
|
|
|
in a piecewise fashion.
|
|
|
|
|
|
|
|
|
|
Who: Eric Biederman <ebiederm@xmission.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2006-03-24 11:18:22 +00:00
|
|
|
What: remove EXPORT_SYMBOL(kernel_thread)
|
|
|
|
|
When: August 2006
|
|
|
|
|
Files: arch/*/kernel/*_ksyms.c
|
2007-07-19 08:48:34 +00:00
|
|
|
Check: kernel_thread
|
2006-03-24 11:18:22 +00:00
|
|
|
Why: kernel_thread is a low-level implementation detail. Drivers should
|
|
|
|
|
use the <linux/kthread.h> API instead which shields them from
|
|
|
|
|
implementation details and provides a higherlevel interface that
|
|
|
|
|
prevents bugs and code duplication
|
|
|
|
|
Who: Christoph Hellwig <hch@lst.de>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2006-02-07 06:43:31 +00:00
|
|
|
What: eepro100 network driver
|
|
|
|
|
When: January 2007
|
|
|
|
|
Why: replaced by the e100 driver
|
|
|
|
|
Who: Adrian Bunk <bunk@stusta.de>
|
2006-02-07 06:47:12 +00:00
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2006-06-28 11:26:45 +00:00
|
|
|
What: Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
|
|
|
|
|
(temporary transition config option provided until then)
|
|
|
|
|
The transition config option will also be removed at the same time.
|
|
|
|
|
When: before 2.6.19
|
|
|
|
|
Why: Unused symbols are both increasing the size of the kernel binary
|
|
|
|
|
and are often a sign of "wrong API"
|
|
|
|
|
Who: Arjan van de Ven <arjan@linux.intel.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2006-08-13 04:17:09 +00:00
|
|
|
What: PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment
|
2006-10-01 02:41:43 +00:00
|
|
|
When: October 2008
|
2006-08-13 04:17:09 +00:00
|
|
|
Why: The stacking of class devices makes these values misleading and
|
|
|
|
|
inconsistent.
|
|
|
|
|
Class devices should not carry any of these properties, and bus
|
|
|
|
|
devices have SUBSYTEM and DRIVER as a replacement.
|
|
|
|
|
Who: Kay Sievers <kay.sievers@suse.de>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
2006-08-13 21:45:52 +00:00
|
|
|
|
2008-04-30 07:54:24 +00:00
|
|
|
What: find_task_by_pid
|
|
|
|
|
When: 2.6.26
|
|
|
|
|
Why: With pid namespaces, calling this funciton will return the
|
|
|
|
|
wrong task when called from inside a namespace.
|
|
|
|
|
|
|
|
|
|
The best way to save a task pid and find a task by this
|
|
|
|
|
pid later, is to find this task's struct pid pointer (or get
|
|
|
|
|
it directly from the task) and call pid_task() later.
|
|
|
|
|
|
|
|
|
|
If someone really needs to get a task by its pid_t, then
|
|
|
|
|
he most likely needs the find_task_by_vpid() to get the
|
|
|
|
|
task from the same namespace as the current task is in, but
|
|
|
|
|
this may be not so in general.
|
|
|
|
|
|
|
|
|
|
Who: Pavel Emelyanov <xemul@openvz.org>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2007-01-29 03:02:30 +00:00
|
|
|
What: ACPI procfs interface
|
2007-07-18 09:23:24 +00:00
|
|
|
When: July 2008
|
|
|
|
|
Why: ACPI sysfs conversion should be finished by January 2008.
|
|
|
|
|
ACPI procfs interface will be removed in July 2008 so that
|
|
|
|
|
there is enough time for the user space to catch up.
|
2007-01-29 03:02:30 +00:00
|
|
|
Who: Zhang Rui <rui.zhang@intel.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2007-01-11 06:49:44 +00:00
|
|
|
What: /proc/acpi/button
|
|
|
|
|
When: August 2007
|
|
|
|
|
Why: /proc/acpi/button has been replaced by events to the input layer
|
|
|
|
|
since 2.6.20.
|
|
|
|
|
Who: Len Brown <len.brown@intel.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
2007-01-23 05:29:01 +00:00
|
|
|
|
2007-08-23 19:20:26 +00:00
|
|
|
What: /proc/acpi/event
|
|
|
|
|
When: February 2008
|
|
|
|
|
Why: /proc/acpi/event has been replaced by events via the input layer
|
|
|
|
|
and netlink since 2.6.23.
|
|
|
|
|
Who: Len Brown <len.brown@intel.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2007-05-17 14:43:26 +00:00
|
|
|
What: libata spindown skipping and warning
|
libata: implement libata.spindown_compat
Now that libata uses sd->manage_start_stop, libata spins down disk on
shutdown. In an attempt to compensate libata's previous shortcoming,
some distros sync and spin down disks attached via libata in their
shutdown(8). Some disks spin back up just to spin down again on
STANDBYNOW1 if the command is issued when the disk is spun down, so
this double spinning down causes problem.
This patch implements module parameter libata.spindown_compat which,
when set to one (default value), prevents libata from spinning down
disks on shutdown thus avoiding double spinning down. Note that
libata spins down disks for suspend to mem and disk, so with
libata.spindown_compat set to one, disks should be properly spun down
in all cases without modifying shutdown(8).
shutdown(8) should be fixed eventually. Some drive do spin up on
SYNCHRONZE_CACHE even when their cache is clean. Those disks
currently spin up briefly when sd tries to shutdown the device and
then the machine powers off immediately, which can't be good for the
head. We can't skip SYNCHRONIZE_CACHE during shudown as it can be
dangerous data integrity-wise.
So, this spindown_compat parameter is already scheduled for removal by
the end of the next year and here's what shutdown(8) should do.
* Check whether /sys/modules/libata/parameters/spindown_compat
exists. If it does, write 0 to it.
* For each libata harddisk {
* Check whether /sys/class/scsi_disk/h:c:i:l/manage_start_stop
exists. Iff it doesn't, synchronize cache and spin the disk
down as before.
}
The above procedure will make shutdown(8) work properly with kernels
before this change, ones with this workaround and later ones without
it.
To accelerate shutdown(8) updates, if the compat mode is in use, this
patch prints BIG FAT warning for five seconds during shutdown (the
optimal interval to annoy the user just the right amount discovered by
hours of tireless usability testing).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 19:28:48 +00:00
|
|
|
When: Dec 2008
|
2007-05-17 14:43:26 +00:00
|
|
|
Why: Some halt(8) implementations synchronize caches for and spin
|
|
|
|
|
down libata disks because libata didn't use to spin down disk on
|
|
|
|
|
system halt (only synchronized caches).
|
|
|
|
|
Spin down on system halt is now implemented. sysfs node
|
|
|
|
|
/sys/class/scsi_disk/h:c:i:l/manage_start_stop is present if
|
|
|
|
|
spin down support is available.
|
libata: implement libata.spindown_compat
Now that libata uses sd->manage_start_stop, libata spins down disk on
shutdown. In an attempt to compensate libata's previous shortcoming,
some distros sync and spin down disks attached via libata in their
shutdown(8). Some disks spin back up just to spin down again on
STANDBYNOW1 if the command is issued when the disk is spun down, so
this double spinning down causes problem.
This patch implements module parameter libata.spindown_compat which,
when set to one (default value), prevents libata from spinning down
disks on shutdown thus avoiding double spinning down. Note that
libata spins down disks for suspend to mem and disk, so with
libata.spindown_compat set to one, disks should be properly spun down
in all cases without modifying shutdown(8).
shutdown(8) should be fixed eventually. Some drive do spin up on
SYNCHRONZE_CACHE even when their cache is clean. Those disks
currently spin up briefly when sd tries to shutdown the device and
then the machine powers off immediately, which can't be good for the
head. We can't skip SYNCHRONIZE_CACHE during shudown as it can be
dangerous data integrity-wise.
So, this spindown_compat parameter is already scheduled for removal by
the end of the next year and here's what shutdown(8) should do.
* Check whether /sys/modules/libata/parameters/spindown_compat
exists. If it does, write 0 to it.
* For each libata harddisk {
* Check whether /sys/class/scsi_disk/h:c:i:l/manage_start_stop
exists. Iff it doesn't, synchronize cache and spin the disk
down as before.
}
The above procedure will make shutdown(8) work properly with kernels
before this change, ones with this workaround and later ones without
it.
To accelerate shutdown(8) updates, if the compat mode is in use, this
patch prints BIG FAT warning for five seconds during shutdown (the
optimal interval to annoy the user just the right amount discovered by
hours of tireless usability testing).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 19:28:48 +00:00
|
|
|
Because issuing spin down command to an already spun down disk
|
2007-05-17 14:43:26 +00:00
|
|
|
makes some disks spin up just to spin down again, libata tracks
|
|
|
|
|
device spindown status to skip the extra spindown command and
|
|
|
|
|
warn about it.
|
|
|
|
|
This is to give userspace tools the time to get updated and will
|
|
|
|
|
be removed after userspace is reasonably updated.
|
libata: implement libata.spindown_compat
Now that libata uses sd->manage_start_stop, libata spins down disk on
shutdown. In an attempt to compensate libata's previous shortcoming,
some distros sync and spin down disks attached via libata in their
shutdown(8). Some disks spin back up just to spin down again on
STANDBYNOW1 if the command is issued when the disk is spun down, so
this double spinning down causes problem.
This patch implements module parameter libata.spindown_compat which,
when set to one (default value), prevents libata from spinning down
disks on shutdown thus avoiding double spinning down. Note that
libata spins down disks for suspend to mem and disk, so with
libata.spindown_compat set to one, disks should be properly spun down
in all cases without modifying shutdown(8).
shutdown(8) should be fixed eventually. Some drive do spin up on
SYNCHRONZE_CACHE even when their cache is clean. Those disks
currently spin up briefly when sd tries to shutdown the device and
then the machine powers off immediately, which can't be good for the
head. We can't skip SYNCHRONIZE_CACHE during shudown as it can be
dangerous data integrity-wise.
So, this spindown_compat parameter is already scheduled for removal by
the end of the next year and here's what shutdown(8) should do.
* Check whether /sys/modules/libata/parameters/spindown_compat
exists. If it does, write 0 to it.
* For each libata harddisk {
* Check whether /sys/class/scsi_disk/h:c:i:l/manage_start_stop
exists. Iff it doesn't, synchronize cache and spin the disk
down as before.
}
The above procedure will make shutdown(8) work properly with kernels
before this change, ones with this workaround and later ones without
it.
To accelerate shutdown(8) updates, if the compat mode is in use, this
patch prints BIG FAT warning for five seconds during shutdown (the
optimal interval to annoy the user just the right amount discovered by
hours of tireless usability testing).
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-04 19:28:48 +00:00
|
|
|
Who: Tejun Heo <htejun@gmail.com>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2007-07-03 13:25:46 +00:00
|
|
|
What: The arch/ppc and include/asm-ppc directories
|
|
|
|
|
When: Jun 2008
|
|
|
|
|
Why: The arch/powerpc tree is the merged architecture for ppc32 and ppc64
|
|
|
|
|
platforms. Currently there are efforts underway to port the remaining
|
|
|
|
|
arch/ppc platforms to the merged tree. New submissions to the arch/ppc
|
|
|
|
|
tree have been frozen with the 2.6.22 kernel release and that tree will
|
|
|
|
|
remain in bug-fix only mode until its scheduled removal. Platforms
|
|
|
|
|
that are not ported by June 2008 will be removed due to the lack of an
|
|
|
|
|
interested maintainer.
|
|
|
|
|
Who: linuxppc-dev@ozlabs.org
|
|
|
|
|
|
|
|
|
|
---------------------------
|
2007-07-18 01:37:41 +00:00
|
|
|
|
2007-10-11 09:20:05 +00:00
|
|
|
What: i386/x86_64 bzImage symlinks
|
2008-04-10 08:12:27 +00:00
|
|
|
When: April 2010
|
2007-10-11 09:20:05 +00:00
|
|
|
|
|
|
|
|
Why: The i386/x86_64 merge provides a symlink to the old bzImage
|
|
|
|
|
location so not yet updated user space tools, e.g. package
|
|
|
|
|
scripts, do not break.
|
|
|
|
|
Who: Thomas Gleixner <tglx@linutronix.de>
|
2007-10-12 02:40:14 +00:00
|
|
|
|
|
|
|
|
---------------------------
|
|
|
|
|
|
2008-01-27 17:14:47 +00:00
|
|
|
What: i2c-i810, i2c-prosavage and i2c-savage4
|
|
|
|
|
When: May 2008
|
|
|
|
|
Why: These drivers are superseded by i810fb, intelfb and savagefb.
|
|
|
|
|
Who: Jean Delvare <khali@linux-fr.org>
|
|
|
|
|
|
|
|
|
|
---------------------------
|
2008-01-28 06:48:37 +00:00
|
|
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2008-01-15 07:43:34 +00:00
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What (Why):
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- include/linux/netfilter_ipv4/ipt_TOS.h ipt_tos.h header files
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(superseded by xt_TOS/xt_tos target & match)
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- "forwarding" header files like ipt_mac.h in
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include/linux/netfilter_ipv4/ and include/linux/netfilter_ipv6/
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- xt_CONNMARK match revision 0
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(superseded by xt_CONNMARK match revision 1)
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- xt_MARK target revisions 0 and 1
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(superseded by xt_MARK match revision 2)
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- xt_connmark match revision 0
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(superseded by xt_connmark match revision 1)
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- xt_conntrack match revision 0
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(superseded by xt_conntrack match revision 1)
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- xt_iprange match revision 0,
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include/linux/netfilter_ipv4/ipt_iprange.h
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(superseded by xt_iprange match revision 1)
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- xt_mark match revision 0
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(superseded by xt_mark match revision 1)
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When: January 2009 or Linux 2.7.0, whichever comes first
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Why: Superseded by newer revisions or modules
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Who: Jan Engelhardt <jengelh@computergmbh.de>
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2008-01-28 22:47:41 +00:00
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---------------------------
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What: b43 support for firmware revision < 410
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When: July 2008
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Why: The support code for the old firmware hurts code readability/maintainability
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and slightly hurts runtime performance. Bugfixes for the old firmware
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are not provided by Broadcom anymore.
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Who: Michael Buesch <mb@bu3sch.de>
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2008-02-10 07:08:53 +00:00
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---------------------------
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2008-02-28 19:19:06 +00:00
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What: init_mm export
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When: 2.6.26
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Why: Not used in-tree. The current out-of-tree users used it to
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work around problems in the CPA code which should be resolved
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by now. One usecase was described to provide verification code
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of the CPA operation. That's a good idea in general, but such
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code / infrastructure should be in the kernel and not in some
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out-of-tree driver.
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Who: Thomas Gleixner <tglx@linutronix.de>
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2008-01-30 01:08:26 +00:00
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2008-04-08 16:20:56 +00:00
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----------------------------
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What: usedac i386 kernel parameter
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When: 2.6.27
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Why: replaced by allowdac and no dac combination
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Who: Glauber Costa <gcosta@redhat.com>
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2008-01-30 01:08:26 +00:00
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---------------------------
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2008-05-14 23:05:30 +00:00
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What: old style serial driver for ColdFire (CONFIG_SERIAL_COLDFIRE)
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When: 2.6.28
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Why: This driver still uses the old interface and has been replaced
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by CONFIG_SERIAL_MCF.
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Who: Sebastian Siewior <sebastian@breakpoint.cc>
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---------------------------
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2008-01-30 01:08:26 +00:00
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What: /sys/o2cb symlink
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When: January 2010
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Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb
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exists as a symlink for backwards compatibility for old versions of
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ocfs2-tools. 2 years should be sufficient time to phase in new versions
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which know to look in /sys/fs/o2cb.
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Who: ocfs2-devel@oss.oracle.com
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2008-04-19 17:49:34 +00:00
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---------------------------
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What: asm/semaphore.h
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When: 2.6.26
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Why: Implementation became generic; users should now include
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linux/semaphore.h instead.
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Who: Matthew Wilcox <willy@linux.intel.com>
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2008-07-02 03:06:22 +00:00
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---------------------------
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What: SCTP_GET_PEER_ADDRS_NUM_OLD, SCTP_GET_PEER_ADDRS_OLD,
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SCTP_GET_LOCAL_ADDRS_NUM_OLD, SCTP_GET_LOCAL_ADDRS_OLD
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When: June 2009
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Why: A newer version of the options have been introduced in 2005 that
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removes the limitions of the old API. The sctp library has been
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converted to use these new options at the same time. Any user
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space app that directly uses the old options should convert to using
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the new options.
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Who: Vlad Yasevich <vladislav.yasevich@hp.com>
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2008-07-06 06:08:07 +00:00
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---------------------------
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2008-06-24 17:38:56 +00:00
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What: CONFIG_THERMAL_HWMON
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When: January 2009
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Why: This option was introduced just to allow older lm-sensors userspace
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to keep working over the upgrade to 2.6.26. At the scheduled time of
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removal fixed lm-sensors (2.x or 3.x) should be readily available.
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Who: Rene Herman <rene.herman@gmail.com>
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2008-07-10 09:16:47 +00:00
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---------------------------
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What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS
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(in net/core/net-sysfs.c)
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When: After the only user (hal) has seen a release with the patches
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for enough time, probably some time in 2010.
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Why: Over 1K .text/.data size reduction, data is available in other
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ways (ioctls)
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Who: Johannes Berg <johannes@sipsolutions.net>
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