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PCI Hotplug: schedule fakephp for feature removal

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Now that the PCI core is capable of function-level remove and rescan
as well as bus-level rescan, there's no functional need to keep fakephp
anymore.

We keep it around for userspace compatibility reasons, schedule removal
in three years.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Alex Chiang 2009-03-20 14:56:56 -06:00 committed by Jesse Barnes
parent 8ffd254547
commit f110ca489c
1 changed files with 33 additions and 0 deletions
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33
Documentation/feature-removal-schedule.txt
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@ -335,6 +335,7 @@ Why: In 2.6.18 the Secmark concept was introduced to replace the "compat_net"
Secmark, it is time to deprecate the older mechanism and start the Secmark, it is time to deprecate the older mechanism and start the
process of removing the old code. process of removing the old code.
Who: Paul Moore <paul.moore@hp.com> Who: Paul Moore <paul.moore@hp.com>
--------------------------- ---------------------------
What: sysfs ui for changing p4-clockmod parameters What: sysfs ui for changing p4-clockmod parameters
@ -344,3 +345,35 @@ Why: See commits 129f8ae9b1b5be94517da76009ea956e89104ce8 and
Removal is subject to fixing any remaining bugs in ACPI which may Removal is subject to fixing any remaining bugs in ACPI which may
cause the thermal throttling not to happen at the right time. cause the thermal throttling not to happen at the right time.
Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com> Who: Dave Jones <davej@redhat.com>, Matthew Garrett <mjg@redhat.com>
---------------------------
What: fakephp and associated sysfs files in /sys/bus/pci/slots/
When: 2011
Why: In 2.6.27, the semantics of /sys/bus/pci/slots was redefined to
represent a machine's physical PCI slots. The change in semantics
had userspace implications, as the hotplug core no longer allowed
drivers to create multiple sysfs files per physical slot (required
for multi-function devices, e.g.). fakephp was seen as a developer's
tool only, and its interface changed. Too late, we learned that
there were some users of the fakephp interface.
In 2.6.30, the original fakephp interface was restored. At the same
time, the PCI core gained the ability that fakephp provided, namely
function-level hot-remove and hot-add.
Since the PCI core now provides the same functionality, exposed in:
/sys/bus/pci/rescan
/sys/bus/pci/devices/.../remove
/sys/bus/pci/devices/.../rescan
there is no functional reason to maintain fakephp as well.
We will keep the existing module so that 'modprobe fakephp' will
present the old /sys/bus/pci/slots/... interface for compatibility,
but users are urged to migrate their applications to the API above.
After a reasonable transition period, we will remove the legacy
fakephp interface.
Who: Alex Chiang <achiang@hp.com>