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authorDominik Brodowski <linux@dominikbrodowski.net>2010-01-15 23:55:21 +0100
committerDominik Brodowski <linux@dominikbrodowski.net>2010-03-03 08:37:41 +0100
commita3f916f2c84f2b9e1d32cc0dbfe326a9e380dbfb (patch)
tree3ed5c2697322f8c6ac1bb2fbec5cc463b2143578 /Documentation
parent6e83ee075ed74941ccaad4fec503f6b24646e7e0 (diff)
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pcmcia: disable pcmcia ioctl for !ARM, prepare for removal
The PCMCIA ioctl -- deprecated for years -- suffers from insufficient locking. As it already has been deprecated for years, with its removal long overdue, limit it to !SMP and !PREEMPT. Furthermore, the last legitimate use of the ioctl to be reported relates to the ARM architecture in 2008.[1] Attempts to resolve this issue turned out unsuccessful so far.[2] Other usages have only been reported as hear-say. If there are any legitiate and necessary use-cases remaining, please speak out before the end of the grace period until 2.6.3{5,6}(-rc1). [1] http://lists.infradead.org/pipermail/linux-pcmcia/2008-April/005440.html see also: http://lkml.org/lkml/2008/2/27/291 [2] http://lists.infradead.org/pipermail/linux-pcmcia/2008-April/005450.html http://lists.infradead.org/pipermail/linux-pcmcia/2010-January/006740.html see also: http://lists.infradead.org/pipermail/linux-pcmcia/2008-April/005453.html CC: Russell King <rmk+kernel@arm.linux.org.uk> CC: Alan Cox <alan@lxorguk.ukuu.org.uk> CC: Robert P. J. Day <rpjday@crashcourse.ca> CC: Jaswinder Singh Rajput <jaswinder@kernel.org> CC: linux-kernel@vger.kernel.org Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/feature-removal-schedule.txt12
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 732b1fa..3e57a75 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -138,19 +138,25 @@ Who: Mauro Carvalho Chehab <mchehab@infradead.org>
---------------------------
What: PCMCIA control ioctl (needed for pcmcia-cs [cardmgr, cardctl])
-When: November 2005
+When: 2.6.35/2.6.36
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
+ unnecessary and potentially harmful (it does not provide for
+ proper locking), 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>
+
+ For all architectures except ARM, the associated config symbol
+ has been removed from kernel 2.6.34; for ARM, it will be likely
+ be removed from kernel 2.6.35. The actual code will then likely
+ be removed from kernel 2.6.36.
+Who: Dominik Brodowski <linux@dominikbrodowski.net>
---------------------------
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