Protect the task lookups in audit_receive_msg() with rcu_read_lock()
instead of tasklist_lock and use lock/unlock_sighand to protect
against the exit race.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

audit_receive_msg() sends uninitialized data for AUDIT_TTY_GET when
the task was not found.

Send reply only when task was found.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

While auditing all tasklist_lock read_lock sites I stumbled over the
following call chain:

audit_prepare_user_tty()
  read_lock(&tasklist_lock);
  tty_audit_push_task();
     mutex_lock(&buf->mutex);

     --> buf->mutex is locked with preemption disabled.

Solve this by acquiring a reference to the task struct under
rcu_read_lock and call tty_audit_push_task outside of the preempt
disabled region.

Move all code which needs to be protected by sighand lock into
tty_audit_push_task() and use lock/unlock_sighand as we do not hold
tasklist_lock.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

... while we are not holding spinlocks.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

I was doing some namespace checks and found some simple stuff in
audit that could be cleaned up. Make some functions static, and
put const on make_reply payload arg.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Add support for matching by security label (e.g. SELinux context) of
the sender of an user-space audit record.

The audit filter code already allows user space to configure such
filters, but they were ignored during evaluation.  This patch implements
evaluation of these filters.

For example, after application of this patch, PAM authentication logs
caused by cron can be disabled using
	auditctl -a user,never -F subj_type=crond_t
Signed-off-by: Miloslav Trmac <mitr@redhat.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Merge branches 'x86-fixes-for-linus' and 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, alternative: Call stop_machine_text_poke() on all cpus
  x86-32: Restore irq stacks NUMA-aware allocations
  x86, memblock: Fix early_node_mem with big reserved region.

* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, uv: More Westmere support on SGI UV
  x86, uv: Enable Westmere support on SGI UV

* 'msm-fixes' of git://codeaurora.org/quic/kernel/dwalker/linux-msm:
  msm: Kconfig: drop unused config options
  msm: fix compile failure when no debug uart is selected
  msm: fix debug-macro.S build failure
  msm: timer: Decrease shift on timer clocksource
  arm: mach-msm: fix error handling in msm_iommu_probe()
  msm: fix Kconfig target board selection
  msm: fix compile failure on struct membank node member

* 'msm-video' of git://codeaurora.org/quic/kernel/dwalker/linux-msm:
  drivers/video/msm/mddi.c: Remove multiple KERN_<level> uses
  drivers: msm: video: add dev_set_name call
  drivers: video: msm: fix hang on disable_irq

* 'for-2637/s3c24xx-all' of git://git.fluff.org/bjdooks/linux:
  ARM: h1940: add UDA1380 to i2c devices list
  ARM: h1940: Fix backlight and LCD power functions
  ARM: S3C2440: fix boot failure introduced by recent changes in gpiolib
  ARM: S3C2440: various fixes in Kconfig file
  ARM: rx1950: Add UDA1380 to i2c devices list
  ARM: rx1950: Add LEDs support
  ARM: rx1950: Add battery device
  ARM: h1940: Implement mmc_power function
  ARM: h1940: Use gpiolib for latch access

Register UDA1380 codec during H1940 machine init
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

Current implementation of LCD and backlight power control functions
is not complete, as result PDA consumes power in suspend.
Fix this issue by managing state of some latch bits, just like
WinMobile does.
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

Currently, text_poke_smp() passes a NULL as the third argument to
__stop_machine(), which will only run stop_machine_text_poke()
on 1 cpu. Change NULL -> cpu_online_mask, as stop_machine_text_poke()
is intended to be run on all cpus.

I actually didn't notice any problems with stop_machine_text_poke()
only being called on 1 cpu, but found this via code inspection.
Signed-off-by: Jason Baron <jbaron@redhat.com>
LKML-Reference: <20101028152026.GB2875@redhat.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

Recent changes in s3c gpio break mini2440 board and may be others.
The problem is that mach-mini2440.c: mini2440_init()
(where we call s3c_gpio_setpull()) is called before s3c2440.c: s3c2440_init()
(where we initialize s3c24xx_gpiocfg_default.set_pull function pointer).
This causes dereferencing of NULL pointer at boot time and a kernel panic.
Signed-off-by: Abdoulaye Walsimou Gaye <awg@embtoolkit.org>

Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

* kconfig symbols defined in arch/arm/mach-s3c2440/Kconfig are only available
  when ARCH_S3C2410 is selected, so no need to make some of them depend
  on ARCH_S3C2410.
* fix CPU_S3C24405B typo in "config S3C2440_DMA".
* mini2440: remove unconditionally select of SND_S3C24XX_SOC_S3C24XX_UDA134X.
Those fixes avoid the following warnings at make time:

scripts/kconfig/qconf arch/arm/Kconfig
warning: (MACH_MINI2440 && ARCH_S3C2410) selects SND_S3C24XX_SOC_S3C24XX_UDA134X
which has unmet direct dependencies (SND_S3C24XX_SOC && ARCH_S3C2410)
warning: (CPU_S3C2440 && ARCH_S3C2410 && S3C2410_DMA) selects S3C2440_DMA which
has unmet direct dependencies (ARCH_S3C2410 && CPU_S3C24405B)
warning: (CPU_S3C2440 && ARCH_S3C2410 || CPU_S3C2442 && ARCH_S3C2410)
selects CPU_S3C244X which has unmet direct dependencies (!ARCH_S3C2410)
Signed-off-by: Abdoulaye Walsimou Gaye <awg@embtoolkit.org>

Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

* 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linux:
  i2c-intel-mid: Driver depends on PCI
  i2c-intel-mid: support for Moorestown and Medfield platform
  i2c-nomadik: fixup bus delays
  i2c-nomadik: support smbus emulation
  i2c-nomadik: dynamic clocking
  i2c-nomadik: documentation fixes
  i2c-s3c2410: Enable i2c clock only when doing some transfert

These two config options don't exist, and aren't ever going to.
So I simply delete them.
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

If the board has a debug uart the user is given a choice of which
uart to use. The user can also select NONE, which means not to use one.
In most of our header files when NONE is selected nothing is defined
for MSM_DEBUG_UART_PHYS or MSM_DEBUG_UART_BASE. This causes a compile
failure in debug-macro.S which expect something to be defined there.

Example of the failure,

arch/arm/kernel/built-in.o: In function `hexbuf':
linux-2.6/arch/arm/kernel/debug.S:186: undefined reference to `MSM_DEBUG_UART_PHYS'
linux-2.6/arch/arm/kernel/debug.S:186: undefined reference to `MSM_DEBUG_UART_BASE'

This fixes the compile failure by adding an ifdef to debug-macro.S
that removes all the debug uart code in the case of NONE.
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

Originally there was an ifdef case to handle when no debug uart
was selected. In commit 0ea12930
that case was removed which causes the following build failure,

linux-2.6/arch/arm/kernel/debug.S: Assembler messages:
linux-2.6/arch/arm/kernel/debug.S:174: Error: bad instruction `addruart r1,r2'
linux-2.6/arch/arm/kernel/debug.S:176: Error: bad instruction `waituart r2,r3'
linux-2.6/arch/arm/kernel/debug.S:177: Error: bad instruction `senduart r1,r3'
linux-2.6/arch/arm/kernel/debug.S:178: Error: bad instruction `busyuart r2,r3'
linux-2.6/arch/arm/kernel/debug.S:190: Error: bad instruction `addruart r1,r2'

This is a partial revert to add back the case which was removed with
two caveats. First the API for the addruart macro was updated, and
the new addruart case now return 0xfff00000 so that a know IO mapping
is created instead of a random one.

Cc: Jeremy Kerr <jeremy.kerr@canonical.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Jason Wang <jason77.wang@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Nicolas Pitre <nico@fluxnic.net>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>

i2c-intel-mid driver uses PCI data structs and interfaces,
so it should depend on PCI.  Fixes these build errors:

drivers/i2c/busses/i2c-intel-mid.c:977: error: implicit declaration of function 'pci_request_region'
drivers/i2c/busses/i2c-intel-mid.c:1077: error: implicit declaration of function 'pci_release_region'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ba Zheng <zheng.ba@intel.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: linux-i2c@vger.kernel.org
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Runtime: Fix typo in status comparison causing warning

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig:
  kconfig: Have streamline_config process menuconfigs too
  kconfig: Fix streamline_config to read multi line deps in Kconfig files
  kconfig: Fix missing declaration of variable $dir in streamline_config.pl
  kconfig: Fix variable name typo %prompts in streamline_config.pl
  kconfig: Make localmodconfig handle environment variables

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (34 commits)
  b43: Fix warning at drivers/mmc/core/core.c:237 in mmc_wait_for_cmd
  mac80211: fix failure to check kmalloc return value in key_key_read
  libertas: Fix sd8686 firmware reload
  ath9k: Fix incorrect access of rate flags in RC
  netfilter: xt_socket: Make tproto signed in socket_mt6_v1().
  stmmac: enable/disable rx/tx in the core with a single write.
  net: atarilance - flags should be unsigned long
  netxen: fix kdump
  pktgen: Limit how much data we copy onto the stack.
  net: Limit socket I/O iovec total length to INT_MAX.
  USB: gadget: fix ethernet gadget crash in gether_setup
  fib: Fix fib zone and its hash leak on namespace stop
  cxgb3: Fix panic in free_tx_desc()
  cxgb3: fix crash due to manipulating queues before registration
  8390: Don't oops on starting dev queue
  dccp ccid-2: Stop polling
  dccp: Refine the wait-for-ccid mechanism
  dccp: Extend CCID packet dequeueing interface
  dccp: Return-value convention of hc_tx_send_packet()
  igbvf: fix panic on load
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: dream: remove dream driver and arch from tree

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6:
  eCryptfs: Print mount_auth_tok_only param in ecryptfs_show_options
  ecryptfs: added ecryptfs_mount_auth_tok_only mount parameter
  ecryptfs: checking return code of ecryptfs_find_auth_tok_for_sig()
  ecryptfs: release keys loaded in ecryptfs_keyring_auth_tok_for_sig()
  eCryptfs: Clear LOOKUP_OPEN flag when creating lower file
  ecryptfs: call vfs_setxattr() in ecryptfs_setxattr()

Product codenames are OK, but once an actual product name is available,
it should be referenced as well.

  http://ark.intel.com/chipset.aspx?familyID=52499Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This code is stalled, with no one working on it anymore, and the main
msm code is now going through the proper channels to get merged
correctly.

So remove it as it contains a number of kernel information leaks and it
is doubtful if it even still builds anymore.
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Bryan Huntsman <bryanh@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kgdb,ppc: Individual register get/set for ppc
  kgdbts: prevent re-entry to kgdbts before it unregisters
  debug_core,x86,blackfin: Clean up hw debug disable API
  kdb: Fix early debugging crash regression
  kgdb,arm: fix register dump
  kdb: fix per_cpu command to remove supress mask
  kdb: Add kdb kernel module sample

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
  parisc-agp: fix missing slab.h include

On module removal, the sdio version of b43 generates the following warning:

[  851.560519] ------------[ cut here ]------------
[  851.560531] WARNING: at drivers/mmc/core/core.c:237 mmc_wait_for_cmd+0x88/0x90()
[  851.560534] Hardware name: 20552PG
[  851.560536] Modules linked in: b43(-) ssb mmc_block binfmt_misc rfcomm sco bnep ppdev l2cap ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge stp kvm_intel kvm arc4 iwlagn snd_hda_codec_conexant snd_hda_intel snd_hda_codec iwlcore snd_hwdep snd_pcm thinkpad_acpi mac80211 snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq r852 joydev snd_timer sm_common pcmcia nand snd_seq_device cfg80211 sdhci_pci btusb psmouse tpm_tis yenta_socket nand_ids lp snd pcmcia_rsrc nand_ecc bluetooth sdhci tpm pcmcia_core parport mtd snd_page_alloc serio_raw tpm_bios soundcore nvram led_class sha256_generic aes_i586 aes_generic dm_crypt i915 drm_kms_helper drm ahci intel_agp i2c_algo_bit intel_gtt e1000e libahci video agpgart output
[  851.560620] Pid: 2504, comm: rmmod Not tainted 2.6.36-titan0+ #1
[  851.560622] Call Trace:
[  851.560631]  [<c014a102>] warn_slowpath_common+0x72/0xa0
[  851.560636]  [<c04d94c8>] ? mmc_wait_for_cmd+0x88/0x90
[  851.560641]  [<c04d94c8>] ? mmc_wait_for_cmd+0x88/0x90
[  851.560645]  [<c014a152>] warn_slowpath_null+0x22/0x30
[  851.560649]  [<c04d94c8>] mmc_wait_for_cmd+0x88/0x90
[  851.560655]  [<c0401585>] ? device_release+0x25/0x80
[  851.560660]  [<c04df210>] mmc_io_rw_direct_host+0xa0/0x150
[  851.560665]  [<c04df370>] mmc_io_rw_direct+0x30/0x40
[  851.560669]  [<c04e06e7>] sdio_disable_func+0x37/0xa0
[  851.560683]  [<f8dfcb80>] b43_sdio_remove+0x30/0x50 [b43]
[  851.560687]  [<c04df8cc>] sdio_bus_remove+0x1c/0x60
[  851.560692]  [<c016d39f>] ? blocking_notifier_call_chain+0x1f/0x30
[  851.560697]  [<c0404991>] __device_release_driver+0x51/0xb0
[  851.560701]  [<c0404a7f>] driver_detach+0x8f/0xa0
[  851.560705]  [<c0403c83>] bus_remove_driver+0x63/0xa0
[  851.560709]  [<c0405039>] driver_unregister+0x49/0x80
[  851.560713]  [<c0405039>] ? driver_unregister+0x49/0x80
[  851.560718]  [<c04dfad7>] sdio_unregister_driver+0x17/0x20
[  851.560727]  [<f8dfcb42>] b43_sdio_exit+0x12/0x20 [b43]
[  851.560734]  [<f8dfe76f>] b43_exit+0x17/0x3c [b43]
[  851.560740]  [<c017fb8d>] sys_delete_module+0x13d/0x200
[  851.560747]  [<c01fd7d2>] ? do_munmap+0x212/0x300
[  851.560752]  [<c010311f>] sysenter_do_call+0x12/0x28
[  851.560757] ---[ end trace 31e14488072d2f7d ]---
[  851.560759] ------------[ cut here ]------------

The warning is caused by b43 not claiming the device before calling
sdio_disable_func().
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reported-by: Arnd Hannemann <arnd@arndnet.de>
Tested-by: Arnd Hannemann <arnd@arndnet.de>
Cc: Stable <stable@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

I noticed two small issues in mac80211/debugfs_key.c::key_key_read while
reading through the code. Patch below.

The key_key_read() function returns ssize_t and the value that's actually
returned is the return value of simple_read_from_buffer() which also
returns ssize_t, so let's hold the return value in a ssize_t local
variable rather than a int one.

Also, memory is allocated dynamically with kmalloc() which can fail, but
the return value of kmalloc() is not checked, so we may end up operating
on a null pointer further on. So check for a NULL return and bail out with
-ENOMEM in that case.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

For the SD8686, we cannot rely on the scratch register to read the firmware
load status, because the same register is used for storing RX packet length.
Broaden the check to account for this.

The module can now be unloaded/reloaded successfully.

Based on the implementation from libertas_tf.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Steve deRosier <steve@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

The index variable to access the rate flags should be obtained from the
inner loop counter which corresponds to the rate table structure.This
fixes the invalid rate selection i.e when the supported basic rate is
invalid on a particular band and also the following warning message.
Thanks to Raj for finding this out.

Call Trace:

 [<ffffffff8104ee4a>] warn_slowpath_common+0x7a/0xb0

 [<ffffffff8104ee95>] warn_slowpath_null+0x15/0x20

 [<ffffffffa0583c45>] ath_get_rate+0x595/0x5b0 [ath9k]

 [<ffffffff811a0636>] ? cpumask_next_and+0x36/0x50

 [<ffffffffa0405186>] rate_control_get_rate+0x86/0x160 [mac80211]

 [<ffffffffa040dfac>] invoke_tx_handlers+0x81c/0x12d0 [mac80211]

 [<ffffffffa040eae9>] ieee80211_tx+0x89/0x2b0 [mac80211]

 [<ffffffff812891bc>] ? pskb_expand_head+0x1cc/0x1f0

 [<ffffffffa040edc5>] ieee80211_xmit+0xb5/0x1c0 [mac80211]

 [<ffffffffa041026f>] ieee80211_tx_skb+0x4f/0x60 [mac80211]

 [<ffffffffa03fe016>] ieee80211_send_nullfunc+0x46/0x60 [mac80211]

 [<ffffffffa03f91d7>] ieee80211_offchannel_stop_station+0x107/0x150
[mac80211]

 [<ffffffff812891bc>] ? pskb_expand_head+0x1cc/0x1f0

 [<ffffffffa040edc5>] ieee80211_xmit+0xb5/0x1c0 [mac80211]

 [<ffffffffa041026f>] ieee80211_tx_skb+0x4f/0x60 [mac80211]

 [<ffffffffa03fe016>] ieee80211_send_nullfunc+0x46/0x60 [mac80211]

 [<ffffffffa03f91d7>] ieee80211_offchannel_stop_station+0x107/0x150
[mac80211]

 [<ffffffffa03f8896>] ieee80211_scan_work+0x146/0x600 [mac80211]

 [<ffffffff8133a375>] ? schedule+0x2f5/0x8e0

 [<ffffffffa03f8750>] ? ieee80211_scan_work+0x0/0x600 [mac80211]

 [<ffffffff81064fcf>] process_one_work+0x10f/0x380

 [<ffffffff81066bc2>] worker_thread+0x162/0x340

 [<ffffffff81066a60>] ? worker_thread+0x0/0x340

Cc: stable@kernel.org
Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

commit 534af108(kgdb,kdb: individual
register set and and get API) introduce dbg_get_reg/dbg_set_reg API
for individual register get and set.

This patch implement those APIs for ppc.
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

The "kgdb_connected" variable of debug_core just indicates whether or
not kgdbts is connected to the debug_core.  It does not completely
prevent a script from trying invoke kgdbts again and possibly crashing
the system (see Call Trace below).

The configured variable in kgtbts can be used instead of
kgdb_connected instead of kgdb_connected. The cleanup_kgdbts() can
also be removed because there is no possible way to build kgdbts as a
kernel module that you could unload with rmmod.

Call Trace:
-----------------------------------------------------------------
root:/$ echo kgdbts=V1S1000 > /sys/module/kgdbts/parameters/kgdbts
kgdb: Unregistered I/O driver kgdbts, debugger disabled.
------------[ cut here ]------------
WARNING: at kernel/debug/debug_core.c:1002
kgdb_unregister_io_module+0xec/0x100()
Hardware name: Moon Creek platform
Modules linked in:
Pid: 664, comm: sh Not tainted 2.6.34.1-WR4.0.0.0_standard #58
Call Trace:
 [<c103b1ed>] warn_slowpath_common+0x6d/0xa0
 [<c1079fdc>] ? kgdb_unregister_io_module+0xec/0x100
 [<c1079fdc>] ? kgdb_unregister_io_module+0xec/0x100
 [<c10544e0>] ? param_attr_store+0x0/0x20
 [<c103b235>] warn_slowpath_null+0x15/0x20
 [<c1079fdc>] kgdb_unregister_io_module+0xec/0x100
 [<c124e4ea>] cleanup_kgdbts+0x1a/0x20
 [<c124eced>] param_set_kgdbts_var+0x6d/0xb0
 [<c124ec80>] ? param_set_kgdbts_var+0x0/0xb0
 [<c10544f7>] param_attr_store+0x17/0x20
 [<c105457c>] module_attr_store+0x2c/0x40
 [<c111fe84>] sysfs_write_file+0x94/0xf0
 [<c10d42f6>] vfs_write+0x96/0x130
 [<c111fdf0>] ? sysfs_write_file+0x0/0xf0
 [<c10d44d6>] sys_write+0x46/0xd0
 [<c13bf329>] system_call_done+0x0/0x4
---[ end trace 4eb028c6ee43154c ]---
kgdb: Unregistered I/O driver kgdbts, debugger disabled.
-----------------------------------------------------------------

[jason.wessel@windriver.com: remove cleanup_kgdbts() ]
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

The kgdb_disable_hw_debug() was an architecture specific function for
disabling all hardware breakpoints on a per cpu basis when entering
the debug core.

This patch will remove the weak function kdbg_disable_hw_debug() and
change it into a call back which lives with the rest of hw breakpoint
call backs in struct kgdb_arch.
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

The kdb_current legally be equal to NULL in the early boot of the x86
arch.  The problem pcan be observed by booting with the kernel arguments:

    earlyprintk=vga ekgdboc=kbd kgdbwait

The kdb shell will oops on entry and recursively fault because it
cannot get past the final stage of shell initialization.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>