GitHub/LineageOS/android_kernel_motorola_exynos9610.git
15 years agoMerge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/core
Ingo Molnar [Tue, 10 Feb 2009 12:25:42 +0000 (13:25 +0100)]
Merge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/core

15 years agoprofiling: fix broken profiling regression
Hugh Dickins [Mon, 9 Feb 2009 19:20:50 +0000 (19:20 +0000)]
profiling: fix broken profiling regression

Impact: fix broken /proc/profile on UP machines

Commit c309b917cab55799ea489d7b5f1b77025d9f8462 "cpumask: convert
kernel/profile.c" broke profiling.  prof_cpu_mask was previously
initialized to CPU_MASK_ALL, but left uninitialized in that commit.
We need to copy cpu_possible_mask (cpu_online_mask is not enough).

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
Linus Torvalds [Mon, 9 Feb 2009 22:00:16 +0000 (14:00 -0800)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: don't use spin_is_contended

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Mon, 9 Feb 2009 21:59:51 +0000 (13:59 -0800)]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: Storage: Update unusual_devs entry for Datafab KECF-USB
  USB: Correct Makefile to make isp1760 buildable
  USB: option: New mobile broadband modems to be supported
  USB: two more usb ids for ti_usb_3410_5052
  USB: ftdi_sio: unlock_kernel() on error in set_serial_info()
  USB: usb-storage: add Pentax to the bad-vendor list
  USB: ftdi_sio: add support for the NDI Polaris system
  USB: usb-serial: fix the aircable_init failure path
  USB: usb-storage: remove WARN from last-sector hacks
  Revert USB: option: add Pantech cards
  USB: cdc-acm.c: remove duplicate lines for MTK gps support
  USB: fsl_qe_udc: Fix stalled TX requests bug
  USB: fsl_qe_udc: Fix muram corruption by disabled endpoints
  USB: fsl_qe_udc: Fix disconnects reporting during bus reset
  USB: fsl_qe_udc: Fix QE USB controller initialization
  USB: fsl_qe_udc: Fix recursive locking bug in ch9getstatus()
  USB: fsl_qe_udc: Fix oops on QE UDC probe failure

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
Linus Torvalds [Mon, 9 Feb 2009 21:58:40 +0000 (13:58 -0800)]
Merge git://git./linux/kernel/git/gregkh/staging-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: panel: fix lcd panel driver build failure
  Staging: android: fix up units in timed_gpio
  Staging: android: ram_console: Disable ECC when early init is enabled and validate buffer size
  Staging: at76_usb: Add support for OQO Model 01+
  Staging: at76_usb: fix bugs introduced by "Staging: at76_usb: cleanup dma on stack issues"
  Revert Staging: at76_usb: update drivers/staging/at76_usb w/ mac80211 port

15 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
Linus Torvalds [Mon, 9 Feb 2009 21:58:22 +0000 (13:58 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/davej/cpufreq

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] powernow-k8: Get transition latency from ACPI _PSS table
  [CPUFREQ] Make ignore_nice_load setting of ondemand work as expected.

15 years agoBtrfs: don't use spin_is_contended
Chris Mason [Mon, 9 Feb 2009 21:22:03 +0000 (16:22 -0500)]
Btrfs: don't use spin_is_contended

Btrfs was using spin_is_contended to see if it should drop locks before
doing extent allocations during btrfs_search_slot.  The idea was to avoid
expensive searches in the tree unless the lock was actually contended.

But, spin_is_contended is specific to the ticket spinlocks on x86, so this
is causing compile errors everywhere else.

In practice, the contention could easily appear some time after we started
doing the extent allocation, and it makes more sense to always drop the lock
instead.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
15 years agoStaging: panel: fix lcd panel driver build failure
Sachin P. Sant [Tue, 3 Feb 2009 15:40:58 +0000 (21:10 +0530)]
Staging: panel: fix lcd panel driver build failure

* Fix build break for lcd panel driver.

Signed-off-by : Sachin Sant <sachinp@in.ibm.com>
Cc: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: android: fix up units in timed_gpio
Greg Kroah-Hartman [Wed, 4 Feb 2009 23:05:05 +0000 (15:05 -0800)]
Staging: android: fix up units in timed_gpio

The last build fix I did messed up the units of the sysfs file.

This puts them back to be milliseconds, like they originally were.

Thanks to Juha Motorsportcom for pointing this out.

Reported-by: Juha Motorsportcom <juha_motorsportcom@luukku.com>
Cc: Mike Lockwood <lockwood@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: android: ram_console: Disable ECC when early init is enabled and validate...
Arve Hjønnevåg [Sat, 31 Jan 2009 04:21:09 +0000 (20:21 -0800)]
Staging: android: ram_console: Disable ECC when early init is enabled and validate buffer size

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: at76_usb: Add support for OQO Model 01+
Jamie Lentin [Wed, 4 Feb 2009 13:38:44 +0000 (13:38 +0000)]
Staging: at76_usb: Add support for OQO Model 01+

Add USB device ID for OQO 01+'s internal wireless LAN

An OQO employee mentions the chip's true identity here:-
   ftp://ftp.oqo.com/unsupported/linux/OQOLinux.html

Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoStaging: at76_usb: fix bugs introduced by "Staging: at76_usb: cleanup dma on stack...
Jason Andryuk [Fri, 30 Jan 2009 14:05:03 +0000 (09:05 -0500)]
Staging: at76_usb: fix bugs introduced by "Staging: at76_usb: cleanup dma on stack issues"

Tracking down the firmware loading problem led to this commit.

$ git bisect bad
0d1d1424330cc1934f2b2742f0cfa2c31e6a250b is first bad commit
commit 0d1d1424330cc1934f2b2742f0cfa2c31e6a250b
Author: Oliver Neukum <oliver@neukum.org>
Date:   Thu Dec 18 13:16:40 2008 +0100

    Staging: at76_usb: cleanup dma on stack issues

    - no DMA on stack
    - cleanup unclear endianness issue

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
:040000 040000 c4fee9ea0fef25926229d810d19dc2f89cca9401
8b165a35d16280d2413b2700a6080ef290ca1009 M drivers

The "no DMA on stack" conversion was incomplete with respect to
updating the arguments passed to usb_control_msg.  The value 40 is
hardcoded as it was prior to conversion.

The driver can now load firmware, but is not fully functional.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Cc: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoRevert Staging: at76_usb: update drivers/staging/at76_usb w/ mac80211 port
Greg Kroah-Hartman [Wed, 4 Feb 2009 00:28:48 +0000 (16:28 -0800)]
Revert Staging: at76_usb: update drivers/staging/at76_usb w/ mac80211 port

Reverts 02227c28391b5059a7710d6039c52912b0ee2c1d
(Had to be done by hand due to other patches that had come after this.)

Turns out that we don't want the mac80211 port of this driver just yet, as
there is a different driver working on adding this support.

So keep things old and different for now.

This is being reverted at the request of the linux-wireless developers.

Cc: Kalle Valo <kalle.valo@iki.fi>
Cc: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: Storage: Update unusual_devs entry for Datafab KECF-USB
Nick Holloway [Sun, 25 Jan 2009 16:58:43 +0000 (16:58 +0000)]
USB: Storage: Update unusual_devs entry for Datafab KECF-USB

This device suffers from the off-by-one error when reporting the capacity,
so add US_FL_FIX_CAPACITY to the existing entry.

Signed-off-by: Nick Holloway <Nick.Holloway@pyrites.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: Correct Makefile to make isp1760 buildable
Ivan Kuten [Fri, 6 Feb 2009 09:42:34 +0000 (17:42 +0800)]
USB: Correct Makefile to make isp1760 buildable

Signed-off-by: Ivan Kuten <ivan.kuten@promwad.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: option: New mobile broadband modems to be supported
Dirk De Schepper [Fri, 6 Feb 2009 20:48:34 +0000 (20:48 +0000)]
USB: option: New mobile broadband modems to be supported

- New Novatel and Dell mobile broadband modem products added
 - Dell pid variables used in stead of numerical PIDs for known
   products

Signed-off-by: Dirk De Schepper <ddeschepper@nvtl.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Matthias Urlichs <matthias@urlichs.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: two more usb ids for ti_usb_3410_5052
Oliver Neukum [Wed, 4 Feb 2009 15:38:33 +0000 (16:38 +0100)]
USB: two more usb ids for ti_usb_3410_5052

This patch adds device IDs and balances the counts to make the
hot ID additioning mechanism work.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: stable <stable@kernel.org>
Cc: Chris Adams <cmadams@hiwaay.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: ftdi_sio: unlock_kernel() on error in set_serial_info()
Dan Carpenter [Tue, 3 Feb 2009 08:11:38 +0000 (11:11 +0300)]
USB: ftdi_sio: unlock_kernel() on error in set_serial_info()

There was one error path where unlock_kernel() wasn't called.

This was found with a code checker (http://repo.or.cz/w/smatch.git/)
Compile tested only, sorry.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: usb-storage: add Pentax to the bad-vendor list
Alan Stern [Wed, 4 Feb 2009 20:48:03 +0000 (15:48 -0500)]
USB: usb-storage: add Pentax to the bad-vendor list

This patch (as1202) adds Pentax to usb-storage's list of bad vendors
whose devices always need the CAPACITY_HEURISTICS flag.  This is in
addition to the existing entries: Nokia, Nikon, and Motorola.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Virgo Pärna <virgo.parna@mail.ee>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: ftdi_sio: add support for the NDI Polaris system
Stephane Clerambault [Mon, 2 Feb 2009 21:39:12 +0000 (13:39 -0800)]
USB: ftdi_sio: add support for the NDI Polaris system

Add support for the NDI Polaris system *http://www.ndigital.com/).

Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: usb-serial: fix the aircable_init failure path
Dave Young [Sun, 1 Feb 2009 10:54:54 +0000 (18:54 +0800)]
USB: usb-serial: fix the aircable_init failure path

The failure path of aircable_init is wrong, fix the order of (goto) labels.

Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Acked-by: Naranjo Manuel Francisco <naranjo.manuel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: usb-storage: remove WARN from last-sector hacks
Alan Stern [Mon, 2 Feb 2009 14:51:01 +0000 (09:51 -0500)]
USB: usb-storage: remove WARN from last-sector hacks

This patch (as1201) removes the WARN() from the last-sector hacks in
usb-storage, thereby making the code match the version now in
.27-stable and .28-stable.  The WARN() isn't needed, since there is no
longer any intention of assuming that all storage devices have an even
number of sectors, and it annoys users for no good reason.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoRevert USB: option: add Pantech cards
Greg Kroah-Hartman [Wed, 4 Feb 2009 00:02:21 +0000 (16:02 -0800)]
Revert USB: option: add Pantech cards

Revert 8b6346ec899713a90890c9e832f7eff91ea73504 as these devices really
work just fine with the cdc-acm driver, as they follow the spec
properly.

Thanks to Chuck Ebbert for pointing out the problem here.

Cc: Chuck Ebbert <cebbert@redhat.com>
Cc: Dan Williams <dcbw@redhat.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: cdc-acm.c: remove duplicate lines for MTK gps support
James Treacy [Fri, 30 Jan 2009 01:17:17 +0000 (20:17 -0500)]
USB: cdc-acm.c: remove duplicate lines for MTK gps support

The same patch to add support for MTK gps loggers was submitted by two
different people and applied twice. Remove the redundant lines.

Signed-off-by: James Treacy <treacy@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix stalled TX requests bug
Anton Vorontsov [Thu, 25 Dec 2008 14:15:14 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix stalled TX requests bug

While disabling an endpoint the driver nuking any pending requests,
thus completing them with -ESHUTDOWN status. But the driver doesn't
clear the tx_req, which means that a next TX request (after
ep_enable), might get stalled, since the driver won't queue the new
reqests.

This patch fixes a bug I'm observing with ethernet gadget while
playing with ifconfig usb0 up/down (the up/down sequence disables
and enables `in' and `out' endpoints).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix muram corruption by disabled endpoints
Anton Vorontsov [Thu, 25 Dec 2008 14:15:11 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix muram corruption by disabled endpoints

Before freeing an endpoint's muram memory, we should stop all activity
of the endpoint, otherwise the QE UDC controller might do nasty things
with the muram memory that isn't belong to that endpoint anymore.

The qe_ep_reset() effectively flushes the hardware fifos, finishes all
late transaction and thus prevents the corruption.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix disconnects reporting during bus reset
Anton Vorontsov [Thu, 25 Dec 2008 14:15:09 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix disconnects reporting during bus reset

Freescale QE UDC controllers can't report the "port change" states,
so the only way to handle disconnects is to process bus reset
interrupts. The bus reset can take some time, that is, few irqs.
Gadgets may print the disconnection events, and this causes few
repetitive messages in the kernel log.

This patch fixes the issue by using the usb_state machine, if the
usb controller has been already reset, just quit the reset irq
early.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix QE USB controller initialization
Anton Vorontsov [Thu, 25 Dec 2008 14:15:07 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix QE USB controller initialization

qe_udc_reg_init() leaves the USB controller enabled before muram memory
initialized. Sometimes the uninitialized muram memory confuses the
controller, and it start sending the busy interrupts.

Fix this by disabling the controller, it will be enabled later by
the gadget driver, at bind time.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix recursive locking bug in ch9getstatus()
Anton Vorontsov [Thu, 25 Dec 2008 14:15:05 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix recursive locking bug in ch9getstatus()

The call chain is this:

qe_udc_irq() <- grabs the udc->lock spinlock
rx_irq()
qe_ep0_rx()
ep0_setup_handle()
setup_received_handle()
ch9getstatus()
qe_ep_queue() <- tries to grab the udc->lock again

It seems unsafe to temporarily drop the lock in the ch9getstatus(),
so to fix that bug the lock-less __qe_ep_queue() function
implemented and used by the ch9getstatus().

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoUSB: fsl_qe_udc: Fix oops on QE UDC probe failure
Anton Vorontsov [Thu, 25 Dec 2008 14:15:02 +0000 (17:15 +0300)]
USB: fsl_qe_udc: Fix oops on QE UDC probe failure

In case of probing errors the driver kfrees the udc_controller, but it
doesn't set the pointer to NULL.

When usb_gadget_register_driver is called, it checks for udc_controller
!= NULL, the check passes and the driver accesses nonexistent memory.
Fix this by setting udc_controller to NULL in case of errors.

While at it, also implement irq_of_parse_and_map()'s failure and cleanup
cases.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
15 years agoMerge branch 'for-2.6.29' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Mon, 9 Feb 2009 18:30:19 +0000 (10:30 -0800)]
Merge branch 'for-2.6.29' of git://linux-nfs.org/~bfields/linux

* 'for-2.6.29' of git://linux-nfs.org/~bfields/linux:
  lockd: fix regression in lockd's handling of blocked locks

15 years agolockd: fix regression in lockd's handling of blocked locks
J. Bruce Fields [Wed, 4 Feb 2009 22:35:38 +0000 (17:35 -0500)]
lockd: fix regression in lockd's handling of blocked locks

If a client requests a blocking lock, is denied, then requests it again,
then here in nlmsvc_lock() we will call vfs_lock_file() without FL_SLEEP
set, because we've already queued a block and don't need the locks code
to do it again.

But that means vfs_lock_file() will return -EAGAIN instead of
FILE_LOCK_DENIED.  So we still need to translate that -EAGAIN return
into a nlm_lck_blocked error in this case, and put ourselves back on
lockd's block list.

The bug was introduced by bde74e4bc64415b1 "locks: add special return
value for asynchronous locks".

Thanks to Frank van Maarseveen for the report; his original test
case was essentially

for i in `seq 30`; do flock /nfsmount/foo sleep 10 & done

Tested-by: Frank van Maarseveen <frankvm@frankvm.com>
Reported-by: Frank van Maarseveen <frankvm@frankvm.com>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
15 years agoi915: Fix more size_t format string warnings
Linus Torvalds [Mon, 9 Feb 2009 16:57:29 +0000 (08:57 -0800)]
i915: Fix more size_t format string warnings

The DRI people seem to have a hard time getting these right (see also
commit aeb565dfc3ac4c8b47c5049085b4c7bfb2c7d5d7).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Mon, 9 Feb 2009 16:52:28 +0000 (08:52 -0800)]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
  drm/i915: select framebuffer support automatically
  drm/i915: add get_vblank_counter function for GM45
  drm/i915: capture last_vblank count at IRQ uninstall time too
  drm/i915: Unlock mutex on i915_gem_fault() error path
  drm/i915: Quiet the message on get/setparam ioctl with an unknown value.
  drm/i915: skip LVDS initialization on Apple Mac Mini
  drm/i915: sync SDVO code with stable userland modesetting driver
  drm/i915: Unref the object after failing to set tiling mode.
  drm/i915: add fence register management to execbuf
  drm/i915: Return error from i915_gem_object_get_fence_reg() when failing.
  drm/i915: Set up an MTRR covering the GTT at driver load.
  drm/i915: Skip SDVO/HDMI init when the chipset tells us it's not present.
  drm/i915: Suppress GEM teardown on X Server exit in KMS mode.
  drm/radeon: fix ioremap conflict with AGP mappings
  i915: fix unneeded locking in i915 LVDS get modes code.

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Mon, 9 Feb 2009 16:52:02 +0000 (08:52 -0800)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: scatterwalk - Avoid flush_dcache_page on slab pages
  crypto: shash - Fix tfm destruction
  crypto: api - Fix zeroing on free
  crypto: shash - Fix module refcount
  crypto: api - Fix algorithm test race that broke aead initialisation

15 years agoFRV: in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now
David Howells [Mon, 9 Feb 2009 16:47:36 +0000 (16:47 +0000)]
FRV: in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now

in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agox86: spinlocks: define dummy __raw_spin_is_contended
Kyle McMartin [Sun, 8 Feb 2009 22:39:58 +0000 (17:39 -0500)]
x86: spinlocks: define dummy __raw_spin_is_contended

Architectures other than mips and x86 are not using ticket spinlocks.
Therefore, the contention on the lock is meaningless, since there is
nobody known to be waiting on it (arguably /fairly/ unfair locks).

Dummy it out to return 0 on other architectures.

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agotracing/function-graph-tracer: handle the leaf functions from trace_pipe
Frederic Weisbecker [Fri, 6 Feb 2009 17:30:44 +0000 (18:30 +0100)]
tracing/function-graph-tracer: handle the leaf functions from trace_pipe

When one cats the trace file, the leaf functions are printed without brackets:

 function();

whereas in the trace_pipe file we'll see the following:

 function() {
 }

This is because the ring_buffer handling is not the same between those two files.
On the trace file, when an entry is printed, the iterator advanced and then we can
check the next entry.

There is no iterator with trace_pipe, the current entry to print has been peeked
and not consumed. So checking the next entry will still return the current one while
we don't consume it.

This patch introduces a new value for the output callbacks to ask the tracing
core to not consume the current entry after printing it.

We need it because we will have to consume the current entry ourself to check
the next one.

Now the trace_pipe is able to handle well the leaf functions.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing/blktrace: move the tracing file to kernel/trace, fix
Ingo Molnar [Mon, 9 Feb 2009 11:06:54 +0000 (12:06 +0100)]
tracing/blktrace: move the tracing file to kernel/trace, fix

Impact: build fix

The BLK_DEV_IO_TRACE entry used to be in block/Kconfig - which
file itself was dependent on CONFIG_BLOCK. But now the entry is
in kernel/trace/Kconfig - which is present even on !CONFIG_BLOCK.

So add a 'depends on BLOCK' to BLK_DEV_IO_TRACE.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing: handle unregistering the current tracer
Arnaldo Carvalho de Melo [Sat, 7 Feb 2009 20:52:59 +0000 (18:52 -0200)]
tracing: handle unregistering the current tracer

Impact: simplification

Instead of requiring that plugins have the sequence:

  my_tracer_stop(my_trace_array);
  unregister_tracer(my_tracer);

it should be possible just do a:

  unregister_tracer(my_tracer);

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing/function-graph-tracer: drop the kernel_text_address check
Frederic Weisbecker [Sat, 7 Feb 2009 23:04:02 +0000 (00:04 +0100)]
tracing/function-graph-tracer: drop the kernel_text_address check

When the function graph tracer picks a return address, it ensures this address
is really a kernel text one by calling __kernel_text_address()

Actually this path has never been taken.Its role was more likely to debug the tracer
on the beginning of its development but this function is wasteful since it is called
for every traced function.

The fault check is already sufficient.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing/power: move the power trace headers to a dedicated file
Frederic Weisbecker [Sat, 7 Feb 2009 21:16:12 +0000 (22:16 +0100)]
tracing/power: move the power trace headers to a dedicated file

Impact: cleanup

Move the power tracer headers to trace/power.h to keep ftrace.h and power bits
more easy to maintain as separated topics.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing/function-graph-tracer: provide a selftest for the function graph tracer
Frederic Weisbecker [Sat, 7 Feb 2009 20:33:57 +0000 (21:33 +0100)]
tracing/function-graph-tracer: provide a selftest for the function graph tracer

Making it more easy to do a basic regression test for this tracer.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agotracing/blktrace: move the tracing file to kernel/trace
Frederic Weisbecker [Sat, 7 Feb 2009 19:46:45 +0000 (20:46 +0100)]
tracing/blktrace: move the tracing file to kernel/trace

Impact: cleanup

Move blktrace.c to kernel/trace, also move its config entry.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
15 years agoMerge branch 'tip/tracing/core/devel' of git://git.kernel.org/pub/scm/linux/kernel...
Ingo Molnar [Mon, 9 Feb 2009 09:35:12 +0000 (10:35 +0100)]
Merge branch 'tip/tracing/core/devel' of git://git./linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace

Conflicts:
kernel/trace/trace_hw_branches.c

15 years agoMerge commit 'v2.6.29-rc4' into tracing/core
Ingo Molnar [Mon, 9 Feb 2009 09:32:48 +0000 (10:32 +0100)]
Merge commit 'v2.6.29-rc4' into tracing/core

15 years agocrypto: scatterwalk - Avoid flush_dcache_page on slab pages
Herbert Xu [Mon, 9 Feb 2009 03:22:14 +0000 (14:22 +1100)]
crypto: scatterwalk - Avoid flush_dcache_page on slab pages

It's illegal to call flush_dcache_page on slab pages on a number
of architectures.  So this patch avoids doing so if PageSlab is
true.

In future we can move the flush_dcache_page call to those page
cache users that actually need it.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
15 years agomm: fix error case in mlock downgrade reversion
Hugh Dickins [Sun, 8 Feb 2009 20:56:58 +0000 (20:56 +0000)]
mm: fix error case in mlock downgrade reversion

Commit 27421e211a39784694b597dbf35848b88363c248, Manually revert
"mlock: downgrade mmap sem while populating mlocked regions", has
introduced its own regression: __mlock_vma_pages_range() may report
an error (for example, -EFAULT from trying to lock down pages from
beyond EOF), but mlock_vma_pages_range() must hide that from its
callers as before.

Reported-by: Sami Farin <safari-kernel@safari.iki.fi>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoLinux 2.6.29-rc4
Linus Torvalds [Sun, 8 Feb 2009 20:37:20 +0000 (12:37 -0800)]
Linux 2.6.29-rc4

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async-update
Linus Torvalds [Sun, 8 Feb 2009 20:35:26 +0000 (12:35 -0800)]
Merge git://git./linux/kernel/git/arjan/linux-2.6-async-update

* git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async-update:
  async: use list_move_tail
  async: Rename _special -> _domain for clarity.
  async: Add some documentation.
  async: Handle kthread_run() return codes.
  async: Fix running list handling.

15 years agoradeonfb: Fix resume from D3Cold on some platforms
Benjamin Herrenschmidt [Thu, 5 Feb 2009 01:06:52 +0000 (12:06 +1100)]
radeonfb: Fix resume from D3Cold on some platforms

For historical reason, this driver used its own saving/restoring
of the PCI config space, and used the state of it on resume as
an indication as to whether it needed to re-POST the chip or not.

This methods breaks with the later core changes since the core will
have restored things for us.

This patch fixes it by removing that custom code, using standard
core methods to save/restore state, and testing for the need to
re-POST by comparing the content of a few key PLL registers.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoaty128fb: Properly save PCI state before changing PCI PM level
Benjamin Herrenschmidt [Thu, 5 Feb 2009 01:06:51 +0000 (12:06 +1100)]
aty128fb: Properly save PCI state before changing PCI PM level

This fixes aty128fb to properly save the PCI config space -before- it
potentially switches the PM state of the chip. This avoids a
warning with the new PM core and is the right thing to do anyway.

I also replaced the hand-coded switch to D2 with a call to the
genericc pci_set_power_state() and removed the code that switches it
back to D0 since the generic code is doing that for us nowadays.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoatyfb: Properly save PCI state before changing PCI PM level
Benjamin Herrenschmidt [Thu, 5 Feb 2009 01:06:50 +0000 (12:06 +1100)]
atyfb: Properly save PCI state before changing PCI PM level

This fixes atyfb to properly save the PCI config space -before- it
potentially switches the PM state of the chip. This avoids a
warning with the new PM core and is the right thing to do anyway.

I also slightly cleaned up the code that checks whether we are
running on a PowerMac to do a runtime check instead of a compile
check only, and replaced a deprecated number with the proper
symbolic constant.

Finally, I removed the useless switch to D0 from resume since
the core does it for us.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoasync: use list_move_tail
Stefan Richter [Mon, 2 Feb 2009 12:24:34 +0000 (13:24 +0100)]
async: use list_move_tail

list.h provides a dedicated primitive for
"list_del followed by list_add_tail"... list_move_tail.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
15 years agoasync: Rename _special -> _domain for clarity.
Cornelia Huck [Tue, 20 Jan 2009 14:31:31 +0000 (15:31 +0100)]
async: Rename _special -> _domain for clarity.

Rename the async_*_special() functions to async_*_domain(), which
describes the purpose of these functions much better.
[Broke up long lines to silence checkpatch]

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
15 years agoasync: Add some documentation.
Cornelia Huck [Mon, 19 Jan 2009 12:45:33 +0000 (13:45 +0100)]
async: Add some documentation.

Add some kerneldoc to the async interface.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
15 years agoasync: Handle kthread_run() return codes.
Cornelia Huck [Mon, 19 Jan 2009 12:45:31 +0000 (13:45 +0100)]
async: Handle kthread_run() return codes.

If we fail to create the manager thread, fall back to non-fastboot.
If we fail to create an async thread, try again after waiting for
a bit.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
15 years agoasync: Fix running list handling.
Cornelia Huck [Mon, 19 Jan 2009 12:45:28 +0000 (13:45 +0100)]
async: Fix running list handling.

async_schedule() should pass in async_running as the running
list, and run_one_entry() should put the entry to be run on
the provided running list instead of always on the generic one.

Reported-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
15 years agodrm/i915: select framebuffer support automatically
Ingo Molnar [Thu, 5 Feb 2009 15:03:34 +0000 (16:03 +0100)]
drm/i915: select framebuffer support automatically

Migration helper.

The i915 driver recently added a 'depends on FB' rule to its
Kconfig entry - which silently turns off DRM_I915 if someone
has a working config but no CONFIG_FB selected, and upgrades
to the latest upstream kernel.

Norbert Preining reported this problem:

   Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=12599
   Subject     : dri /dev node disappeared with 2.6.29-rc1

So change it to "select FB", which auto-selects framebuffer
support. This way the driver keeps working, regardless of
whether FB was enabled before or not.

Kconfig select's of interactive options can be problematic to
dependencies and can cause build breakages - but in this case
it's safe because it's a leaf entry with no dependencies of its
own.

( There is some minor circular dependency fallout as FB_I810
  and FB_INTEL also used 'depends on FB' constructs - update
  those to "select FB" too. )

Reported-by: Norbert Preining <preining@logic.at>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: add get_vblank_counter function for GM45
Jesse Barnes [Fri, 6 Feb 2009 18:22:41 +0000 (10:22 -0800)]
drm/i915: add get_vblank_counter function for GM45

As discussed in the long thread about vblank related timeouts, it turns out
GM45 has different frame count registers than previous chips.  This patch
adds support for them, which prevents us from waiting on really stale
sequence values in drm_wait_vblank (which rather than returning immediately
ends up timing out or getting interrupted).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: capture last_vblank count at IRQ uninstall time too
Jesse Barnes [Fri, 6 Feb 2009 21:04:49 +0000 (13:04 -0800)]
drm/i915: capture last_vblank count at IRQ uninstall time too

In dc1336ff4fe08ae7cfe8301bfd7f0b2cfd31d20a (set vblank enable flag correctly
across IRQ uninstall), we made sure drivers that uninstall their interrupt
handler set the vblank enabled flag correctly, so that when interrupts are
re-enabled, vblank interrupts & counts work as expected.  However I missed the
last_vblank field:  it needs to be updated as well, otherwise, at the next
drm_update_vblank_count we'll end up comparing a current count to a stale
one (the last one captured by the disable function), which may trigger the
wraparound handling, leading to a jumpy counter and hangs in drm_wait_vblank.

The jumpy counter can prevent the DRM_WAIT_ON from returning success if the
difference between the current count and the requested count is greater than
2^23, leading to timeouts or hangs, if the ioctl is restarted in a loop (as
is the case in libdrm < 2.4.4).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Michel Dänzer <michel@daenzer.net>
Tested-by: Timo Aaltonen <tjaalton@cc.hut.fi>
Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agodrm/i915: Unlock mutex on i915_gem_fault() error path
Chris Wilson [Wed, 4 Feb 2009 14:15:10 +0000 (14:15 +0000)]
drm/i915: Unlock mutex on i915_gem_fault() error path

If we failed to allocate a new fence register we would return
VM_FAULT_SIGBUS without relinquishing the lock.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Quiet the message on get/setparam ioctl with an unknown value.
Eric Anholt [Tue, 3 Feb 2009 20:10:21 +0000 (12:10 -0800)]
drm/i915: Quiet the message on get/setparam ioctl with an unknown value.

Getting an unknown get/setparam used to be more significant back when they
didn't change much.  However, now that we're in the git world we're using
them instead of a monotonic version number to signal feature availability,
so clients ask about unknown params on older kernels more often.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: skip LVDS initialization on Apple Mac Mini
Paul Collins [Wed, 4 Feb 2009 10:05:41 +0000 (23:05 +1300)]
drm/i915: skip LVDS initialization on Apple Mac Mini

The Apple Mac Mini falsely reports LVDS.  Use DMI to check whether we
are running on a Mac Mini, and skip LVDS initialization if that proves
to be the case.

Signed-off-by: Paul Collins <paul@ondioline.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: sync SDVO code with stable userland modesetting driver
Jesse Barnes [Mon, 2 Feb 2009 23:11:52 +0000 (15:11 -0800)]
drm/i915: sync SDVO code with stable userland modesetting driver

Pull in an update from the 2D driver (hopefully the last one, future work
should be done here and pulled back into xf86-video-intel as needed).

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Unref the object after failing to set tiling mode.
Chris Wilson [Fri, 30 Jan 2009 21:10:22 +0000 (21:10 +0000)]
drm/i915: Unref the object after failing to set tiling mode.

Cleanup the object reference on the error paths.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: add fence register management to execbuf
Jesse Barnes [Tue, 27 Jan 2009 01:10:45 +0000 (17:10 -0800)]
drm/i915: add fence register management to execbuf

Adds code to set up fence registers at execbuf time on pre-965 chips as
necessary.  Also fixes up a few bugs in the pre-965 tile register support
(get_order != ffs).  The number of fences available to the kernel defaults
to the hw limit minus 3 (for legacy X front/back/depth), but a new parameter
allows userspace to override that as needed.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Return error from i915_gem_object_get_fence_reg() when failing.
Eric Anholt [Tue, 27 Jan 2009 18:33:49 +0000 (10:33 -0800)]
drm/i915: Return error from i915_gem_object_get_fence_reg() when failing.

Previously, the caller would continue along without knowing that the
function failed, resulting in potential mis-rendering.  Right now vm_fault
just returns SIGBUS in that case, and we may need to disable signal handling
to avoid that happening.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Set up an MTRR covering the GTT at driver load.
Eric Anholt [Fri, 23 Jan 2009 20:57:47 +0000 (12:57 -0800)]
drm/i915: Set up an MTRR covering the GTT at driver load.

We'd love to just be using PAT, but even on chips with PAT it gets disabled
sometimes due to an errata.  It would probably be better to have pat_enabled
exported and only bother with this when !pat_enabled.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Skip SDVO/HDMI init when the chipset tells us it's not present.
Eric Anholt [Thu, 22 Jan 2009 21:01:02 +0000 (13:01 -0800)]
drm/i915: Skip SDVO/HDMI init when the chipset tells us it's not present.

This saves startup time from probing SDVO, and saves setting up HDMI outputs
on G4X devices that don't have them.

Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/i915: Suppress GEM teardown on X Server exit in KMS mode.
Eric Anholt [Thu, 22 Jan 2009 17:56:58 +0000 (09:56 -0800)]
drm/i915: Suppress GEM teardown on X Server exit in KMS mode.

Fixes hangs when starting X for the second time.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
15 years agodrm/radeon: fix ioremap conflict with AGP mappings
Dave Airlie [Sat, 7 Feb 2009 01:15:41 +0000 (11:15 +1000)]
drm/radeon: fix ioremap conflict with AGP mappings

this solves a regression from
http://bugzilla.kernel.org/show_bug.cgi?id=12441

Reported-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
15 years agotrace: trivial fixes in comment typos.
Wenji Huang [Fri, 6 Feb 2009 09:33:27 +0000 (17:33 +0800)]
trace: trivial fixes in comment typos.

Impact: clean up

Fixed several typos in the comments.

Signed-off-by: Wenji Huang <wenji.huang@oracle.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoring-buffer: use generic version of in_nmi
Steven Rostedt [Fri, 6 Feb 2009 06:45:16 +0000 (01:45 -0500)]
ring-buffer: use generic version of in_nmi

Impact: clean up

Now that a generic in_nmi is available, this patch removes the
special code in the ring_buffer and implements the in_nmi generic
version instead.

With this change, I was also able to rename the "arch_ftrace_nmi_enter"
back to "ftrace_nmi_enter" and remove the code from the ring buffer.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoftrace: change function graph tracer to use new in_nmi
Steven Rostedt [Fri, 6 Feb 2009 06:14:26 +0000 (01:14 -0500)]
ftrace: change function graph tracer to use new in_nmi

The function graph tracer piggy backed onto the dynamic ftracer
to use the in_nmi custom code for dynamic tracing. The problem
was (as Andrew Morton pointed out) it really only wanted to bail
out if the context of the current CPU was in NMI context. But the
dynamic ftrace in_nmi custom code was true if _any_ CPU happened
to be in NMI context.

Now that we have a generic in_nmi interface, this patch changes
the function graph code to use it instead of the dynamic ftarce
custom code.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agonmi: add generic nmi tracking state
Steven Rostedt [Fri, 6 Feb 2009 05:51:37 +0000 (00:51 -0500)]
nmi: add generic nmi tracking state

This code adds an in_nmi() macro that uses the current tasks preempt count
to track when it is in NMI context. Other parts of the kernel can
use this to determine if the context is in NMI context or not.

This code was inspired by the -rt patch in_nmi version that was
written by Peter Zijlstra, who borrowed that code from
Mathieu Desnoyers.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoftrace, x86: rename in_nmi variable
Steven Rostedt [Fri, 6 Feb 2009 03:30:07 +0000 (22:30 -0500)]
ftrace, x86: rename in_nmi variable

Impact: clean up

The in_nmi variable in x86 arch ftrace.c is a misnomer.
Andrew Morton pointed out that the in_nmi variable is incremented
by all CPUS. It can be set when another CPU is running an NMI.

Since this is actually intentional, the fix is to rename it to
what it really is: "nmi_running"

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoring-buffer: allow tracing_off to be used in core kernel code
Steven Rostedt [Fri, 6 Feb 2009 00:54:51 +0000 (19:54 -0500)]
ring-buffer: allow tracing_off to be used in core kernel code

tracing_off() is the fastest way to stop recording to the ring buffers.
This may be used in places like panic and die, just before the
ftrace_dump is called.

This patch adds the appropriate CPP conditionals to make it a stub
function when the ring buffer is not configured it.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoring-buffer: add NMI protection for spinlocks
Steven Rostedt [Thu, 5 Feb 2009 23:43:07 +0000 (18:43 -0500)]
ring-buffer: add NMI protection for spinlocks

Impact: prevent deadlock in NMI

The ring buffers are not yet totally lockless with writing to
the buffer. When a writer crosses a page, it grabs a per cpu spinlock
to protect against a reader. The spinlocks taken by a writer are not
to protect against other writers, since a writer can only write to
its own per cpu buffer. The spinlocks protect against readers that
can touch any cpu buffer. The writers are made to be reentrant
with the spinlocks disabling interrupts.

The problem arises when an NMI writes to the buffer, and that write
crosses a page boundary. If it grabs a spinlock, it can be racing
with another writer (since disabling interrupts does not protect
against NMIs) or with a reader on the same CPU. Luckily, most of the
users are not reentrant and protects against this issue. But if a
user of the ring buffer becomes reentrant (which is what the ring
buffers do allow), if the NMI also writes to the ring buffer then
we risk the chance of a deadlock.

This patch moves the ftrace_nmi_enter called by nmi_enter() to the
ring buffer code. It replaces the current ftrace_nmi_enter that is
used by arch specific code to arch_ftrace_nmi_enter and updates
the Kconfig to handle it.

When an NMI is called, it will set a per cpu variable in the ring buffer
code and will clear it when the NMI exits. If a write to the ring buffer
crosses page boundaries inside an NMI, a trylock is used on the spin
lock instead. If the spinlock fails to be acquired, then the entry
is discarded.

This bug appeared in the ftrace work in the RT tree, where event tracing
is reentrant. This workaround solved the deadlocks that appeared there.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agotrace: remove deprecated entry->cpu
Steven Rostedt [Sun, 8 Feb 2009 00:38:43 +0000 (19:38 -0500)]
trace: remove deprecated entry->cpu

Impact: fix to prevent developers from using entry->cpu

With the new ring buffer infrastructure, the cpu for the entry is
implicit with which CPU buffer it is on.

The original code use to record the current cpu into the generic
entry header, which can be retrieved by entry->cpu. When the
ring buffer was introduced, the users were convert to use the
the cpu number of which cpu ring buffer was in use (this was passed
to the tracers by the iterator: iter->cpu).

Unfortunately, the cpu item in the entry structure was never removed.
This allowed for developers to use it instead of the proper iter->cpu,
unknowingly, using an uninitialized variable. This was not the fault
of the developers, since it would seem like the logical place to
retrieve the cpu identifier.

This patch removes the cpu item from the entry structure and fixes
all the users that should have been using iter->cpu.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
Linus Torvalds [Sat, 7 Feb 2009 18:46:30 +0000 (10:46 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jbarnes/pci-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI PM: make the PM core more careful with drivers using the new PM framework
  PCI PM: Read power state from device after trying to change it on resume
  PCI PM: Do not disable and enable bridges during suspend-resume
  PCI: PCIe portdrv: Simplify suspend and resume
  PCI PM: Fix saving of device state in pci_legacy_suspend
  PCI PM: Check if the state has been saved before trying to restore it
  PCI PM: Fix handling of devices without drivers
  PCI: return error on failure to read PCI ROMs
  PCI: properly clean up ASPM link state on device remove

15 years agomodule: remove over-zealous check in __module_get()
Rusty Russell [Sat, 7 Feb 2009 07:45:56 +0000 (18:15 +1030)]
module: remove over-zealous check in __module_get()

Impact: fix spurious BUG_ON() triggered under load

module_refcount() isn't reliable outside stop_machine(), as demonstrated
by Karsten Keil <kkeil@suse.de>, networking can trigger it under load
(an inc on one cpu and dec on another while module_refcount() is tallying
 can give false results, for example).

Almost noone should be using __module_get, but that's another issue.

Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
Linus Torvalds [Sat, 7 Feb 2009 16:30:20 +0000 (08:30 -0800)]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (30 commits)
  ACPI: Kconfig text - Fix the ACPI_CONTAINER module name according to the real module name.
  eeepc-laptop: fix oops when changing backlight brightness during eeepc-laptop init
  ACPICA: Fix table entry truncation calculation
  ACPI: Enable bit 11 in _PDC to advertise hw coord
  ACPI: struct device - replace bus_id with dev_name(), dev_set_name()
  ACPI: add missing KERN_* constants to printks
  ACPI: dock: Don't eval _STA on every show_docked sysfs read
  ACPI: disable ACPI cleanly when bad RSDP found
  ACPI: delete CPU_IDLE=n code
  ACPI: cpufreq: Remove deprecated /proc/acpi/processor/../performance proc entries
  ACPI: make some IO ports off-limits to AML
  ACPICA: add debug dump of BIOS _OSI strings
  ACPI: proc_dir_entry 'video/VGA' already registered
  ACPI: Skip the first two elements in the _BCL package
  ACPI: remove BM_RLD access from idle entry path
  ACPI: remove locking from PM1x_STS register reads
  eeepc-laptop: use netlink interface
  eeepc-laptop: Implement rfkill hotplugging in eeepc-laptop
  eeepc-laptop: Check return values from rfkill_register
  eeepc-laptop: Add support for extended hotkeys
  ...

15 years agoMerge branches 'release', 'asus', 'bugzilla-12450', 'cpuidle', 'debug', 'ec', 'misc...
Len Brown [Sat, 7 Feb 2009 06:34:56 +0000 (01:34 -0500)]
Merge branches 'release', 'asus', 'bugzilla-12450', 'cpuidle', 'debug', 'ec', 'misc', 'printk' and 'processor' into release

15 years agoACPI: Kconfig text - Fix the ACPI_CONTAINER module name according to the real module...
Thierry Vignaud [Sat, 7 Feb 2009 06:12:19 +0000 (01:12 -0500)]
ACPI: Kconfig text - Fix the ACPI_CONTAINER module name according to the real module name.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoeeepc-laptop: fix oops when changing backlight brightness during eeepc-laptop init
Darren Salt [Sat, 7 Feb 2009 06:02:07 +0000 (01:02 -0500)]
eeepc-laptop: fix oops when changing backlight brightness during eeepc-laptop init

I got the following oops while changing the backlight brightness during
startup.  When it happens, it prevents use of the hotkeys, Fn-Fx, and the
lid button.

It's a clear use-before-init, as I verified by testing with an
appropriately-placed "else printk".

BUG: unable to handle kernel NULL pointer dereference at 00000000
*pde = 00000000
Oops: 0002 [#1] PREEMPT SMP
Pid: 160, comm: kacpi_notify Not tainted (2.6.28.1-eee901 #4) 901
EIP: 0060:[<c0264e68>]  [<c0264e68>] eeepc_hotk_notify+26/da
EFLAGS: 00010246 CPU: 1
Using defaults from ksymoops -t elf32-i386 -a i386
EAX: 00000009 EBX: 00000000 ECX: 00000009 EDX: f70dbf64
ESI: 00000029 EDI: f7335188 EBP: c02112c9 ESP: f70dbf80
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
 f70731e0 f73acd50 c02164ac f7335180 f70aa040 c02112e6 f733518c c012b62f
 f70aa044 f70aa040 c012bdba f70aa04c 00000000 c012be6e 00000000 f70bdf80
 c012e198 f70dbfc4 f70dbfc4 f70aa040 c012bdba 00000000 c012e0c9 c012e091
Call Trace:
 [<c02164ac>] ? acpi_ev_notify_dispatch+4c/55
 [<c02112e6>] ? acpi_os_execute_deferred+1d/25
 [<c012b62f>] ? run_workqueue+71/f1
 [<c012bdba>] ? worker_thread+0/bf
 [<c012be6e>] ? worker_thread+b4/bf
 [<c012e198>] ? autoremove_wake_function+0/2b
 [<c012bdba>] ? worker_thread+0/bf
 [<c012e0c9>] ? kthread+38/5f
 [<c012e091>] ? kthread+0/5f
 [<c0103abf>] ? kernel_thread_helper+7/10
Code: 00 00 00 00 c3 83 3d 60 5c 50 c0 00 56 89 d6 53 0f 84 c4 00 00 00 8d 42
e0 83 f8 0f 77 0f 8b 1d 68 5c 50 c0 89 d8 e8 a9 fa ff ff <89> 03 8b 1d 60 5c
50 c0 89 f2 83 e2 7f 0f b7 4c 53 10 8d 41 01

Signed-off-by: Darren Salt <linux@youmustbejoking.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoACPICA: Fix table entry truncation calculation
Myron Stowe [Fri, 30 Jan 2009 22:44:53 +0000 (15:44 -0700)]
ACPICA: Fix table entry truncation calculation

During early boot, ACPI RSDT/XSDT table entries are gathered into the
'initial_tables[]' array.  This array is currently statically defined (see
./drivers/acpi/tables.c).  When there are more table entries than can be
held in the 'initial_tables[]' array, the message "Truncating N table
entries!" is output.  As currently implemented, this message will always
erroneously calculate N as 0.

This patch fixes the calculation that determines how many table entries
will be missing (truncated).

This modification may be used under either the GPL or the BSD-style
license used for Intel ACPI CA code.

Signed-off-by: Myron Stowe <myron.stowe@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoACPI: Enable bit 11 in _PDC to advertise hw coord
Pallipadi, Venkatesh [Mon, 2 Feb 2009 19:57:18 +0000 (11:57 -0800)]
ACPI: Enable bit 11 in _PDC to advertise hw coord

Bit 11 in intel PDC definitions is meant for OS capability to handle
hardware coordination of P-states. In Linux we have always supported
hwardware coordination of P-states. Just let the BIOSes know that we
support it, by setting this bit.

Some BIOSes use this bit to choose between hardware or software coordination
and without this change below, BIOSes switch to software coordination, which
is not very optimal in terms of power consumption and extra wakeups from idle.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoACPI: struct device - replace bus_id with dev_name(), dev_set_name()
Kay Sievers [Sun, 25 Jan 2009 22:40:56 +0000 (23:40 +0100)]
ACPI: struct device - replace bus_id with dev_name(), dev_set_name()

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoACPI: add missing KERN_* constants to printks
Frank Seidel [Wed, 4 Feb 2009 16:03:07 +0000 (17:03 +0100)]
ACPI: add missing KERN_* constants to printks

According to kerneljanitors todo list all printk calls (beginning
a new line) should have an according KERN_* constant.
Those are the missing peaces here for the acpi subsystem.

Signed-off-by: Frank Seidel <frank@f-seidel.de>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoACPI: dock: Don't eval _STA on every show_docked sysfs read
Holger Macht [Tue, 20 Jan 2009 11:18:24 +0000 (12:18 +0100)]
ACPI: dock: Don't eval _STA on every show_docked sysfs read

Some devices trigger a DEVICE_CHECK on every evalutation of _STA. This
can also be seen in commit 8b59560a3baf2e7c24e0fb92ea5d09eca92805db
(ACPI: dock: avoid check _STA method).  If an undock is processed, the
dock driver sends a uevent and userspace might read the show_docked
property in sysfs. This causes an evaluation of _STA of the particular
device which causes the dock driver to immediately dock again.

In any case, evaluation of _STA (show_docked) does not necessarily mean
that we are docked, so check with the internal device structure.

http://bugzilla.kernel.org/show_bug.cgi?id=12360

Signed-off-by: Holger Macht <hmacht@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
15 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Sat, 7 Feb 2009 02:52:55 +0000 (18:52 -0800)]
Merge branch 'for-linus' of git://git./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:
  CRED: Fix SUID exec regression

15 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
Linus Torvalds [Sat, 7 Feb 2009 02:37:22 +0000 (18:37 -0800)]
Merge git://git./linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (37 commits)
  Btrfs: Make sure dir is non-null before doing S_ISGID checks
  Btrfs: Fix memory leak in cache_drop_leaf_ref
  Btrfs: don't return congestion in write_cache_pages as often
  Btrfs: Only prep for btree deletion balances when nodes are mostly empty
  Btrfs: fix btrfs_unlock_up_safe to walk the entire path
  Btrfs: change btrfs_del_leaf to drop locks earlier
  Btrfs: Change btrfs_truncate_inode_items to stop when it hits the inode
  Btrfs: Don't try to compress pages past i_size
  Btrfs: join the transaction in __btrfs_setxattr
  Btrfs: Handle SGID bit when creating inodes
  Btrfs: Make btrfs_drop_snapshot work in larger and more efficient chunks
  Btrfs: Change btree locking to use explicit blocking points
  Btrfs: hash_lock is no longer needed
  Btrfs: disable leak debugging checks in extent_io.c
  Btrfs: sort references by byte number during btrfs_inc_ref
  Btrfs: async threads should try harder to find work
  Btrfs: selinux support
  Btrfs: make btrfs acls selectable
  Btrfs: Catch missed bios in the async bio submission thread
  Btrfs: fix readdir on 32 bit machines
  ...

15 years agoeCryptfs: Regression in unencrypted filename symlinks
Tyler Hicks [Sat, 7 Feb 2009 00:06:51 +0000 (18:06 -0600)]
eCryptfs: Regression in unencrypted filename symlinks

The addition of filename encryption caused a regression in unencrypted
filename symlink support.  ecryptfs_copy_filename() is used when dealing
with unencrypted filenames and it reported that the new, copied filename
was a character longer than it should have been.

This caused the return value of readlink() to count the NULL byte of the
symlink target.  Most applications don't care about the extra NULL byte,
but a version control system (bzr) helped in discovering the bug.

Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 years agoMerge branch 'x86/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux...
Linus Torvalds [Sat, 7 Feb 2009 02:36:02 +0000 (18:36 -0800)]
Merge branch 'x86/fixes' of git://git./linux/kernel/git/frob/linux-2.6-roland

* 'x86/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
  x86-64: fix int $0x80 -ENOSYS return

15 years agox86-64: fix int $0x80 -ENOSYS return
Roland McGrath [Sat, 7 Feb 2009 02:15:18 +0000 (18:15 -0800)]
x86-64: fix int $0x80 -ENOSYS return

One of my past fixes to this code introduced a different new bug.
When using 32-bit "int $0x80" entry for a bogus syscall number,
the return value is not correctly set to -ENOSYS.  This only happens
when neither syscall-audit nor syscall tracing is enabled (i.e., never
seen if auditd ever started).  Test program:

/* gcc -o int80-badsys -m32 -g int80-badsys.c
   Run on x86-64 kernel.
   Note to reproduce the bug you need auditd never to have started.  */

#include <errno.h>
#include <stdio.h>

int
main (void)
{
  long res;
  asm ("int $0x80" : "=a" (res) : "0" (99999));
  printf ("bad syscall returns %ld\n", res);
  return res != -ENOSYS;
}

The fix makes the int $0x80 path match the sysenter and syscall paths.

Reported-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Roland McGrath <roland@redhat.com>
15 years agoMerge branch 'to-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux...
Linus Torvalds [Sat, 7 Feb 2009 02:10:04 +0000 (18:10 -0800)]
Merge branch 'to-linus' of git://git./linux/kernel/git/frob/linux-2.6-roland

* 'to-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
  elf core dump: fix get_user use

15 years agoelf core dump: fix get_user use
Roland McGrath [Sat, 7 Feb 2009 01:34:07 +0000 (17:34 -0800)]
elf core dump: fix get_user use

The elf_core_dump() code does its work with set_fs(KERNEL_DS) in force,
so vma_dump_size() needs to switch back with set_fs(USER_DS) to safely
use get_user() for a normal user-space address.

Checking for VM_READ optimizes out the case where get_user() would fail
anyway.  The vm_file check here was already superfluous given the control
flow earlier in the function, so that is a cleanup/optimization unrelated
to other changes but an obvious and trivial one.

Reported-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Roland McGrath <roland@redhat.com>
15 years agoCRED: Fix SUID exec regression
David Howells [Fri, 6 Feb 2009 11:45:46 +0000 (11:45 +0000)]
CRED: Fix SUID exec regression

The patch:

commit a6f76f23d297f70e2a6b3ec607f7aeeea9e37e8d
CRED: Make execve() take advantage of copy-on-write credentials

moved the place in which the 'safeness' of a SUID/SGID exec was performed to
before de_thread() was called.  This means that LSM_UNSAFE_SHARE is now
calculated incorrectly.  This flag is set if any of the usage counts for
fs_struct, files_struct and sighand_struct are greater than 1 at the time the
determination is made.  All of which are true for threads created by the
pthread library.

However, since we wish to make the security calculation before irrevocably
damaging the process so that we can return it an error code in the case where
we decide we want to reject the exec request on this basis, we have to make the
determination before calling de_thread().

So, instead, we count up the number of threads (CLONE_THREAD) that are sharing
our fs_struct (CLONE_FS), files_struct (CLONE_FILES) and sighand_structs
(CLONE_SIGHAND/CLONE_THREAD) with us.  These will be killed by de_thread() and
so can be discounted by check_unsafe_exec().

We do have to be careful because CLONE_THREAD does not imply FS or FILES.

We _assume_ that there will be no extra references to these structs held by the
threads we're going to kill.

This can be tested with the attached pair of programs.  Build the two programs
using the Makefile supplied, and run ./test1 as a non-root user.  If
successful, you should see something like:

[dhowells@andromeda tmp]$ ./test1
--TEST1--
uid=4043, euid=4043 suid=4043
exec ./test2
--TEST2--
uid=4043, euid=0 suid=0
SUCCESS - Correct effective user ID

and if unsuccessful, something like:

[dhowells@andromeda tmp]$ ./test1
--TEST1--
uid=4043, euid=4043 suid=4043
exec ./test2
--TEST2--
uid=4043, euid=4043 suid=4043
ERROR - Incorrect effective user ID!

The non-root user ID you see will depend on the user you run as.

[test1.c]
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

static void *thread_func(void *arg)
{
while (1) {}
}

int main(int argc, char **argv)
{
pthread_t tid;
uid_t uid, euid, suid;

printf("--TEST1--\n");
getresuid(&uid, &euid, &suid);
printf("uid=%d, euid=%d suid=%d\n", uid, euid, suid);

if (pthread_create(&tid, NULL, thread_func, NULL) < 0) {
perror("pthread_create");
exit(1);
}

printf("exec ./test2\n");
execlp("./test2", "test2", NULL);
perror("./test2");
_exit(1);
}

[test2.c]
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv)
{
uid_t uid, euid, suid;

getresuid(&uid, &euid, &suid);
printf("--TEST2--\n");
printf("uid=%d, euid=%d suid=%d\n", uid, euid, suid);

if (euid != 0) {
fprintf(stderr, "ERROR - Incorrect effective user ID!\n");
exit(1);
}
printf("SUCCESS - Correct effective user ID\n");
exit(0);
}

[Makefile]
CFLAGS = -D_GNU_SOURCE -Wall -Werror -Wunused
all: test1 test2

test1: test1.c
gcc $(CFLAGS) -o test1 test1.c -lpthread

test2: test2.c
gcc $(CFLAGS) -o test2 test2.c
sudo chown root.root test2
sudo chmod +s test2

Reported-by: David Smith <dsmith@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: David Smith <dsmith@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
15 years agovfs: Don't call attach_nobh_buffers() with an empty list
Dave Kleikamp [Fri, 6 Feb 2009 20:59:26 +0000 (14:59 -0600)]
vfs: Don't call attach_nobh_buffers() with an empty list

This is a modification of a patch by Bill Pemberton <wfp5p@virginia.edu>

nobh_write_end() could call attach_nobh_buffers() with head == NULL.
This would result in a trap when attach_nobh_buffers() attempted to
access bh->b_this_page.

This can be illustrated by running the writev01 testcase from LTP on jfs.

This error was introduced by commit 5b41e74a "vfs: fix data leak in
nobh_write_end()".  That patch did not take into account that if
PageMappedToDisk() is true upon entry to nobh_write_begin(), then no
buffers will be allocated for the page.  In that case, we won't have to
worry about a failed write leaving unitialized data in the page.

Of course, head != NULL implies !page_has_buffers(page), so no need to
test both.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Dmitri Monakhov <dmonakhov@openvz.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>