Commit Graph

157168 Commits

Author SHA1 Message Date
Corentin Chary
1d4a3800c7 asus-laptop: Show HRWS in infos and fix output format
Show HRWS in /sys/platform/devices/asus-laptop/infos.
HRWS is a bitfield used to get information about Hardware
available in the laptop.
Also change sprintf format from 0x%04x to %#x.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Corentin Chary
5f634c6527 led: document sysfs interface
Also fix Documentation/led-class.txt, the acceptable
range of values for brightness is 0-max_brightness, not 0-255.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Corentin Chary
243ca3e401 video/lcd: document sysfs interface
Date and KernelVersion may be wrong because the lcd
interface was introduced before git initial import.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Corentin Chary
3c4c1b69a2 video/backlight: document sysfs interface
Date and KernelVersion may be wrong because the backlight
interface was introduced before git initial import.

Cc:Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Corentin Chary
d0a6825c92 eeepc-laptop: document sysfs interface
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Corentin Chary
d1ec9c3d43 eeepc-laptop: add rfkill support for the Wimax in ASUS Eee PC 1000HG
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:12 -04:00
Alan Jenkins
c200da5d29 eeepc-laptop: switch to dev_pm_ops
This also involves switching the resume handler from the acpi device
to the platform device.  Using the more fine grained handlers allows
two improvements:

1. We only need to recheck rfkill state after resume from hibernation.

2. The wireless LED workaround accounts for up to 1.1s out of 1.7s
resuming devices (when wireless is enabled).  We can limit the
workaround to thaw(), so that it only delays suspend to disk.

The workaround is only likely to help when hibernation is aborted.
Suspend to ram cannot be aborted by the user.  Device suspend errors may
well happen before eeepc-laptop would even be frozen.  Suspend errors
which happen after that could be pretty funky anyway.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
c1edd99f1c eeepc-laptop: correct the description of the hibernation abort bug
Actually it is only the LED which is affected.  The bios bug does not
disable the wifi.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
a47461011a eeepc-laptop: check the 3G rfkill state on resume
All the rfkill devices are treated as "persistent", 3G is no exception.
This means their state may change over hibernation.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
ffb0357528 eeepc-laptop: remove redundant rfkill_set_sw_state in resume handler
rfkill_set_sw_state() will already be called by eeepc_rfkill_hotplug().

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
f2a9d5e8a6 eeepc-laptop: make input device a child of the platform device
Sysfs showed the ehotk input device as a "virtual" device - lies!
The input device is provided by a physical device, the eeepc platform.

This requires that we move the creation of the input device to come
after platform device is created.  Input initialization is moved from
ehotk_check() [sic] to a new function called eeepc_input_init().  This
brings the input device into line with the other eeepc-laptop devices.

Also, refuse to load if we fail to register the input device.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
1e7798547f eeepc-laptop: fix ordering of init and exit functions
1. input and backlight devices were registered after acpi notifications
   are enabled.  This left a window where eeepc_hotk_notify() might
   find these devices in an inconsistent (half-initialized) state.

-> Move all device registration into eeepc_hotk_add(), which is called
   before enabling acpi notifications.

2. input and backlight devices were unregistered before acpi
   notifications are disabled.  This left a window where
   eeepc_hotk_notify() might find these devices in an inconsistent
   (half-destroyed) state.

-> Move all device unregistration into eeepc_hotk_remove(), which is
   called after disabling acpi notifications.

3. The acpi driver was not freed if an error occured further down in
   eeepc_laptop_init().

-> The rest of eeepc_laptop_init() has been moved to eeepc_hotk_add(),
   so this is no longer a problem.

4. The acpi driver was unregistered before the platform driver.  This
   left a window where a sysfs access could attempt to read the ehotk
   structure after it had been freed by eeepc_hotk_remove().

-> The acpi driver is now unregistered as the last step in
   eeepc_laptop_exit(), so this is no longer a problem.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
07e84aa98f eeepc-laptop: fix pci hotplug race on load and unload
Wifi rfkill state changes can race with pci hotplug cleanup.  A simple
fix is to refresh the hotplug state just before deregistering the pci
hotplug slot.

There is also potential for a hotplug notification to fire too early
during setup, while the structures it uses are still being initialised.
(This could only happen if the BIOS performs hotplug itself; a bug
triggered by removing the battery while hibernated).  Avoid this by
registering the notifier later.  The same refresh mechanism is used
to handle rfkill state changes which can now race with registration.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
dcf443b581 eeepc-laptop: use a mutex to serialize pci hotplug (resume vs. notify)
Commit d0265f0 "eeepc-laptop: fix hot-unplug on resume" used a workqueue
to protect pci hotplug against multiple simultaneous calls during
resume.  It seems to work, but a mutex would be more appropriate.

This is in preparation to fix the potential pci hotplug race on unload.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:11 -04:00
Alan Jenkins
6d41839e76 eeepc-laptop: don't touch the pci slot if it was claimed by a different driver
The whole point of registering as a PCI hotplug driver was to prevent
conflict with pciehp.  At the moment it happens to work because
eeepc-laptop is loaded first, but it doesn't work the other way round.
If pciehp is loaded first then we fail to claim the slot - we need to
respect this and not handle hotplug events.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28 15:21:10 -04:00
Linus Torvalds
326ba5010a Linux 2.6.31-rc8 2009-08-27 17:59:04 -07:00
James Bottomley
1b364bf438 module: workaround duplicate section names
The root cause is a duplicate section name (.text); is this legal?
[ Amerigo Wang: "AFAIK, yes." ]

However, there's a problem with commit
6d76013381 in that if you fail to allocate
a mod->sect_attrs (in this case it's null because of the duplication),
it still gets used without checking in add_notes_attrs()

This should fix it

[ This patch leaves other problems, particularly the sections directory,
  but recent parisc toolchains seem to produce these modules and this
  prevents a crash and is a minimal change -- RR ]

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:33:19 -07:00
Rusty Russell
7d1d16e416 module: fix BUG_ON() for powerpc (and other function descriptor archs)
The rarely-used symbol_put_addr() needs to use dereference_function_descriptor
on powerpc.

Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:33:19 -07:00
Jeremy Fitzhardinge
0a80fb1023 xenfb: connect to backend before registering fb
As soon as the framebuffer is registered, our methods may be called by the
kernel. This leads to a crash as xenfb_refresh() gets called before we have
the irq.

Connect to the backend before registering our framebuffer with the kernel.

[ Fixes bug http://bugzilla.kernel.org/show_bug.cgi?id=14059 ]

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:31:18 -07:00
Linus Torvalds
9c504cadc4 Merge branch 'for-linus' of git://git.infradead.org/users/eparis/notify
* 'for-linus' of git://git.infradead.org/users/eparis/notify:
  inotify: Ensure we alwasy write the terminating NULL.
  inotify: fix locking around inotify watching in the idr
  inotify: do not BUG on idr entries at inotify destruction
  inotify: seperate new watch creation updating existing watches
2009-08-27 12:26:02 -07:00
Benjamin Herrenschmidt
4f8ee2c9cc lmb: Remove __init from lmb_end_of_DRAM()
We call lmb_end_of_DRAM() to test whether a DMA mask is ok on a machine
without IOMMU, but this function is marked as __init.

I don't think there's a clean way to get the top of RAM max_pfn doesn't
appear to include highmem or I missed (or we have a bug :-) so for now,
let's just avoid having a broken 2.6.31 by making this function
non-__init and we can revisit later.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:25:26 -07:00
Linus Torvalds
cf481442f2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  9p: update documentation pointers
  9p: remove unnecessary v9fses->options which duplicates the mount string
  net/9p: insulate the client against an invalid error code sent by a 9p server
  9p: Add missing cast for the error return value in v9fs_get_inode
  9p: Remove redundant inode uid/gid assignment
  9p: Fix possible regressions when ->get_sb fails.
  9p: Fix v9fs show_options
  9p: Fix possible memleak in v9fs_inode_from fid.
  9p: minor comment fixes
  9p: Fix possible inode leak in v9fs_get_inode.
  9p: Check for error in return value of v9fs_fid_add
2009-08-27 12:24:08 -07:00
Julien TINNES
788d908f28 ipv4: make ip_append_data() handle NULL routing table
Add a check in ip_append_data() for NULL *rtp to prevent future bugs in
callers from being exploitable.

Signed-off-by: Julien Tinnes <julien@cr0.org>
Signed-off-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:23:43 -07:00
David Howells
9886e836a6 AFS: Stop readlink() on AFS crashing due to NULL 'file' ptr
kAFS crashes when asked to read a symbolic link because page_getlink()
passes a NULL file pointer to read_mapping_page(), but afs_readpage()
expects a file pointer from which to extract a key.

Modify afs_readpage() to request the appropriate key from the calling
process's keyrings if a file struct is not supplied with one attached.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-27 12:22:08 -07:00
Eric W. Biederman
0db501bd06 inotify: Ensure we alwasy write the terminating NULL.
Before the rewrite copy_event_to_user always wrote a terqminating '\0'
byte to user space after the filename.  Since the rewrite that
terminating byte was skipped if your filename is exactly a multiple of
event_size.  Ouch!

So add one byte to name_size before we round up and use clear_user to
set userspace to zero like /dev/zero does instead of copying the
strange nul_inotify_event.  I can't quite convince myself len_to_zero
will never exceed 16 and even if it doesn't clear_user should be more
efficient and a more accurate reflection of what the code is trying to
do.

Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
2009-08-27 08:02:10 -04:00
Eric Paris
dead537dd8 inotify: fix locking around inotify watching in the idr
The are races around the idr storage of inotify watches.  It's possible
that a watch could be found from sys_inotify_rm_watch() in the idr, but it
could be removed from the idr before that code does it's removal.  Move the
locking and the refcnt'ing so that these have to happen atomically.

Signed-off-by: Eric Paris <eparis@redhat.com>
2009-08-27 08:02:04 -04:00
Eric Paris
cf4374267f inotify: do not BUG on idr entries at inotify destruction
If an inotify watch is left in the idr when an fsnotify group is destroyed
this will lead to a BUG.  This is not a dangerous situation and really
indicates a programming bug and leak of memory.  This patch changes it to
use a WARN and a printk rather than killing people's boxes.

Signed-off-by: Eric Paris <eparis@redhat.com>
2009-08-27 08:02:04 -04:00
Eric Paris
52cef7555a inotify: seperate new watch creation updating existing watches
There is nothing known wrong with the inotify watch addition/modification
but this patch seperates the two code paths to make them each easy to
verify as correct.

Signed-off-by: Eric Paris <eparis@redhat.com>
2009-08-27 08:02:04 -04:00
Linus Torvalds
1e23502cc5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  virtio: net refill on out-of-memory
  smc91x: fix compilation on SMP
2009-08-26 20:54:48 -07:00
Linus Torvalds
e99b1f22f9 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc/ps3: Update ps3_defconfig
  powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
2009-08-26 20:39:31 -07:00
Geoff Levand
b080f187ad powerpc/ps3: Update ps3_defconfig
Update ps3_defconfig.

 o Refresh for 2.6.31.
 o Remove MTD support.
 o Add more HID drivers.

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-08-27 13:27:59 +10:00
Geert Uytterhoeven
7b6a09f3d6 powerpc/ps3: Add missing check for PS3 to rtc-ps3 platform device registration
On non-PS3, we get:

| kernel BUG at drivers/rtc/rtc-ps3.c:36!

because the rtc-ps3 platform device is registered unconditionally in a kernel
with builtin support for PS3.

Reported-by: Sachin Sant <sachinp@in.ibm.com>
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-08-27 13:25:46 +10:00
Linus Torvalds
5311034ddd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  IMA: iint put in ima_counts_get and put
2009-08-26 20:17:07 -07:00
Linus Torvalds
533995ed85 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k,m68knommu: Wire up rt_tgsigqueueinfo and perf_counter_open
  m68k: Fix redefinition of pgprot_noncached
  arch/m68k/include/asm/motorola_pgalloc.h: fix kunmap arg
  m68k: cnt reaches -1, not 0
  m68k: count can reach 51, not 50
2009-08-26 20:16:38 -07:00
Thadeu Lima de Souza Cascardo
cc674c81f0 leds: after setting inverted attribute, we must update the LED
If we change the inverted attribute to another value, the LED will not be
inverted until we change the GPIO state.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: Samuel R. C. Vale <srcvale@holoscopio.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:53 -07:00
Thadeu Lima de Souza Cascardo
48cccd26f3 leds: fix multiple requests and releases of IRQ for GPIO LED Trigger
When setting the same GPIO number, multiple IRQ shared requests will be
done without freing the previous request.  It will also try to free a
failed request or an already freed IRQ if 0 was written to the gpio file.

All these oops and leaks were fixed with the following solution: keep the
previous allocated GPIO (if any) still allocated in case the new request
fails.  The alternative solution would desallocate the previous allocated
GPIO and set gpio as 0.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Samuel R. C. Vale <srcvale@holoscopio.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:53 -07:00
Frans Pop
bdf57de4e6 acpi processor: remove superfluous warning message
This failure is very common on many platforms.  Handling it in the ACPI
processor driver is enough, and we don't need a warning message unless
CONFIG_ACPI_DEBUG is set.

Based on a patch from Zhang Rui.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389

Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:53 -07:00
Frans Pop
2a908002c7 ACPI processor: force throttling state when BIOS returns incorrect value
If the BIOS reports an invalid throttling state (which seems to be
fairly common after system boot), a reset is done to state T0.
Because of a check in acpi_processor_get_throttling_ptc(), the reset
never actually gets executed, which results in the error reoccurring
on every access of for example /proc/acpi/processor/CPU0/throttling.

Add a 'force' option to acpi_processor_set_throttling() to ensure
the reset really takes effect.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13389

This patch, together with the next one, fixes a regression introduced in
2.6.30, listed on the regression list. They have been available for 2.5
months now in bugzilla, but have not been picked up, despite various
reminders and without any reason given.

Google shows that numerous people are hitting this issue. The issue is in
itself relatively minor, but the bug in the code is clear.

The patches have been in all my kernels and today testing has shown that
throttling works correctly with the patches applied when the system
overheats (http://bugzilla.kernel.org/show_bug.cgi?id=13918#c14).

Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:53 -07:00
Costantino Leandro
f3d83e2415 wmi: fix kernel panic when stack protection enabled.
Summary:
Kernel panic arise when stack protection is enabled, since strncat will
add a null terminating byte '\0'; So in functions
like this one (wmi_query_block):
        char wc[4]="WC";
	....
	strncat(method, block->object_id, 2);
        ...
the length of wc should be n+1 (wc[5]) or stack protection
fault will arise. This is not noticeable when stack protection is
disabled,but , isn't good either.
Config used: [CONFIG_CC_STACKPROTECTOR_ALL=y,
	      CONFIG_CC_STACKPROTECTOR=y]

Panic Trace
------------
       .... stack-protector: kernel stack corrupted in : fa7b182c
       2.6.30-rc8-obelisco-generic
       call_trace:
           [<c04a6c40>] ? panic+0x45/0xd9
	   [<c012925d>] ? __stack_chk_fail+0x1c/0x40
	   [<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
	   [<fa7b182c>] ? wmi_query_block+0x15a/0x162 [wmi]
	   [<fa7e7000>] ? acer_wmi_init+0x00/0x61a [acer_wmi]
	   [<fa7e7135>] ? acer_wmi_init+0x135/0x61a [acer_wmi]
	   [<c0101159>] ? do_one_initcall+0x50+0x126

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13514

Signed-off-by: Costantino Leandro <lcostantino@gmail.com>
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Len Brown <len.brown@intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:53 -07:00
Yinghai Lu
ce8442b551 acpi: don't call acpi_processor_init if acpi is disabled
Jens reported early_ioremap messages with old ASUS board...

> [    1.507461] pci 0000:00:09.0: Firmware left e100 interrupts enabled; disabling
> [    1.532778] early_ioremap(3fffd080, 0000005c) [0] => Pid: 1, comm: swapper Not tainted 2.6.31-rc4 #36
> [    1.561007] Call Trace:
> [    1.568638]  [<c136e48b>] ? printk+0x18/0x1d
> [    1.581734]  [<c15513ff>] __early_ioremap+0x74/0x1e9
> [    1.596898]  [<c15515aa>] early_ioremap+0x1a/0x1c
> [    1.611270]  [<c154a187>] __acpi_map_table+0x18/0x1a
> [    1.626451]  [<c135a7f8>] acpi_os_map_memory+0x1d/0x25
> [    1.642129]  [<c119459c>] acpi_tb_verify_table+0x20/0x49
> [    1.658321]  [<c1193e50>] acpi_get_table_with_size+0x53/0xa1
> [    1.675553]  [<c1193eae>] acpi_get_table+0x10/0x15
> [    1.690192]  [<c155cc19>] acpi_processor_init+0x23/0xab
> [    1.706126]  [<c1001043>] do_one_initcall+0x33/0x180
> [    1.721279]  [<c155cbf6>] ? acpi_processor_init+0x0/0xab
> [    1.737479]  [<c106893a>] ? register_irq_proc+0xaa/0xc0
> [    1.753411]  [<c10689b7>] ? init_irq_proc+0x67/0x80
> [    1.768316]  [<c15405e7>] kernel_init+0x120/0x176
> [    1.782678]  [<c15404c7>] ? kernel_init+0x0/0x176
> [    1.797062]  [<c10038b7>] kernel_thread_helper+0x7/0x10
> [    1.812984] 00000080 + ffe00000

that is rather later.
acpi_gbl_permanent_mmap should be set in acpi_early_init()
if acpi is not disabled

and we have
> [    0.000000] ASUS P2B-DS detected: force use of acpi=ht

just don't load acpi_processor_init...

Reported-and-tested-by: Jens Rosenboom <jens@leia.mcbone.net>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
Michael Brunner
0d288162f2 thermal_sys: check get_temp return value
The return value of the get_temp function is not checked when doing a
thermal zone update.  This may lead to a critical shutdown if get_temp
fails and the content of the temp variable is incorrectly set higher than
the critical trip point.

This has been observed on a system with incorrect ACPI implementation
where the corresponding methods were not serialized and therefore
sometimes triggered ACPI errors (AE_ALREADY_EXISTS).  The following
critical shutdowns indicated a temperature of 2097 C, which was obviously
wrong.

The patch adds a return value check that jumps over all trip point
evaluations printing a warning if get_temp fails.  The trip points are
evaluated again on the next polling interval with successful get_temp
execution.

Signed-off-by: Michael Brunner <mibru@gmx.de>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
Oleg Nesterov
4ab6c08336 clone(): fix race between copy_process() and de_thread()
Spotted by Hiroshi Shimamoto who also provided the test-case below.

copy_process() uses signal->count as a reference counter, but it is not.
This test case

	#include <sys/types.h>
	#include <sys/wait.h>
	#include <unistd.h>
	#include <stdio.h>
	#include <errno.h>
	#include <pthread.h>

	void *null_thread(void *p)
	{
		for (;;)
			sleep(1);

		return NULL;
	}

	void *exec_thread(void *p)
	{
		execl("/bin/true", "/bin/true", NULL);

		return null_thread(p);
	}

	int main(int argc, char **argv)
	{
		for (;;) {
			pid_t pid;
			int ret, status;

			pid = fork();
			if (pid < 0)
				break;

			if (!pid) {
				pthread_t tid;

				pthread_create(&tid, NULL, exec_thread, NULL);
				for (;;)
					pthread_create(&tid, NULL, null_thread, NULL);
			}

			do {
				ret = waitpid(pid, &status, 0);
			} while (ret == -1 && errno == EINTR);
		}

		return 0;
	}

quickly creates an unkillable task.

If copy_process(CLONE_THREAD) races with de_thread()
copy_signal()->atomic(signal->count) breaks the signal->notify_count
logic, and the execing thread can hang forever in kernel space.

Change copy_process() to increment count/live only when we know for sure
we can't fail.  In this case the forked thread will take care of its
reference to signal correctly.

If copy_process() fails, check CLONE_THREAD flag.  If it it set - do
nothing, the counters were not changed and current belongs to the same
thread group.  If it is not set, ->signal must be released in any case
(and ->count must be == 1), the forked child is the only thread in the
thread group.

We need more cleanups here, in particular signal->count should not be used
by de_thread/__exit_signal at all.  This patch only fixes the bug.

Reported-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Tested-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
Minchan Kim
03ef83af52 mm: fix for infinite churning of mlocked pages
An mlocked page might lose the isolatation race.  This causes the page to
clear PG_mlocked while it remains in a VM_LOCKED vma.  This means it can
be put onto the [in]active list.  We can rescue it by using try_to_unmap()
in shrink_page_list().

But now, As Wu Fengguang pointed out, vmscan has a bug.  If the page has
PG_referenced, it can't reach try_to_unmap() in shrink_page_list() but is
put into the active list.  If the page is referenced repeatedly, it can
remain on the [in]active list without being moving to the unevictable
list.

This patch fixes it.

Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KOSAKI Motohiro <<kosaki.motohiro@jp.fujitsu.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
David Rientjes
b62e408c05 flex_array: convert element_nr formals to unsigned
It's problematic to allow signed element_nr's or total's to be passed as
part of the flex array API.

flex_array_alloc() allows total_nr_elements to be set to a negative
quantity, which is obviously erroneous.

flex_array_get() and flex_array_put() allows negative array indices in
dereferencing an array part, which could address memory mapped before
struct flex_array.

The fix is to convert all existing element_nr formals to be qualified as
unsigned.  Existing checks to compare it to total_nr_elements or the max
array size based on element_size need not be changed.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
David Rientjes
8e7ee27095 flex_array: declare parts member to have incomplete type
The `parts' member of struct flex_array should evaluate to an incomplete
type so that sizeof() cannot be used and C99 does not require the
zero-length specification.

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
David Rientjes
105b6e8a74 flex_array: fix flex_array_free_parts comment
flex_array_free_parts() does not take `src' or `element_nr' formals, so
remove their respective comments.

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
David Rientjes
a30b595d2c flex_array: fix get function for elements in base starting at non-zero
If all array elements fit into the base structure and data is copied using
flex_array_put() starting at a non-zero index, flex_array_get() will fail
to return the data.

This fixes the bug by only checking for NULL parts when all elements do
not fit in the base structure when flex_array_get() is used.  Otherwise,
fa_element_to_part_nr() will always be 0 since there are no parts
structures needed and such element may never have been put.  Thus, it will
remain NULL due to the kzalloc() of the base.

Additionally, flex_array_put() now only checks for a NULL part when all
elements do not fit in the base structure.  This is otherwise unnecessary
since the base structure is guaranteed to exist (or we would have already
hit a NULL pointer).

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
Joonwoo Park
054b2b13cc pps: fix incorrect verdict check
Fix incorrect verdict check and returns error if device_create failed,
otherwise driver triggers kernel oops.

Signed-off-by: Joonwoo Park<joonwpark81@gmail.com>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-08-26 20:06:52 -07:00
Eric Paris
53a7197aff IMA: iint put in ima_counts_get and put
ima_counts_get() calls ima_iint_find_insert_get() which takes a reference
to the iint in question, but does not put that reference at the end of the
function.  This can lead to a nasty memory leak.  Easy enough to reproduce:

#include <sys/mman.h>
#include <stdio.h>

int main (void)
{
	int i;
	void *ptr;

	for (i=0; i < 100000; i++) {
		ptr = mmap(NULL, 4096, PROT_READ|PROT_WRITE,
			   MAP_SHARED|MAP_ANONYMOUS, -1, 0);
		if (ptr == MAP_FAILED)
			return 2;
		munmap(ptr, 4096);
	}

	return 0;
}

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
2009-08-27 11:01:03 +10:00
Geert Uytterhoeven
9848484fad m68k,m68knommu: Wire up rt_tgsigqueueinfo and perf_counter_open
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
2009-08-26 23:14:50 +02:00