Fake "address-of" expressions that evaluate to NULL generally confuse
readers and can provoke compiler warnings.  This patch (as1411) removes
one such fake expression, using an "#ifdef" in its place.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Linus wrote:
 This seems to make "make oldconfig" a _lot_ more verbose than it
 used to be. In a very annoying way.

 I just did a quick git bisect. It's introduced by commit 4062f1a4
 ("kconfig: use long options in conf") by Sam Ravnborg. Apparently that
 thing is totally buggy, and doesn't just change the option names, but
 actively breaks them.

The old behaviour (from years ago) were reintroduced by accident.  Fix
this so we are back to the version that are silent if there is nothing
to ask about.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Make /dev/console get initialised before any initialisation routine that
invokes modprobe because if modprobe fails, it's going to want to open
/dev/console, presumably to write an error message to.

The problem with that is that if the /dev/console driver is not yet
initialised, the chardev handler will call request_module() to invoke
modprobe, which will fail, because we never compile /dev/console as a
module.

This will lead to a modprobe loop, showing the following in the kernel
log:

	request_module: runaway loop modprobe char-major-5-1
	request_module: runaway loop modprobe char-major-5-1
	request_module: runaway loop modprobe char-major-5-1
	request_module: runaway loop modprobe char-major-5-1
	request_module: runaway loop modprobe char-major-5-1

This can happen, for example, when the built in md5 module can't find
the built in cryptomgr module (because the latter fails to initialise).
The md5 module comes before the call to tty_init(), presumably because
'crypto' comes before 'drivers' alphabetically.

Fix this by calling tty_init() from chrdev_init().
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

request_key() should return -ENOKEY if the key it constructs has been
negatively instantiated.

Without this, request_key() can return an unusable key to its caller,
and if the caller then does key_validate() that won't catch the problem.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (204 commits)
  agp: intel-agp: do not use PCI resources before pci_enable_device()
  agp: efficeon-agp: do not use PCI resources before pci_enable_device()
  drm: kill BKL from common code
  drm/kms: Simplify setup of the initial I2C encoder config.
  drm,io-mapping: Specify slot to use for atomic mappings
  drm/radeon/kms: only expose underscan on avivo chips
  drm/radeon: add new pci ids
  drm: Cleanup after failing to create master->unique and dev->name
  drm/radeon: tone down overchatty acpi debug messages.
  drm/radeon/kms: enable underscan option for digital connectors
  drm/radeon/kms: fix calculation of h/v scaling factors
  drm/radeon/kms/igp: sideport is AMD only
  drm/radeon/kms: handle the case of no active displays properly in the bandwidth code
  drm: move ttm global code to core drm
  drm/i915: Clear the Ironlake dithering flags when the pipe doesn't want it.
  drm/radeon/kms: make sure HPD is set to NONE on analog-only connectors
  drm/radeon/kms: make sure rio_mem is valid before unmapping it
  drm/agp/i915: trim stolen space to 32M
  drm/i915: Unset cursor if out-of-bounds upon mode change (v4)
  drm/i915: Unreference object not handle on creation
  ...

* 'kms-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  kgdb,docs: Update the kgdb docs to include kms
  drm_fb_helper: Preserve capability to use atomic kms
  i915: when kgdb is active display compression should be off
  drm/i915: use new fb debug hooks
  drm: add KGDB/KDB support
  fb: add hooks to handle KDB enter/exit
  kgdboc: Add call backs to allow kernel mode switching
  vt,console,kdb: automatically set kdb LINES variable
  vt,console,kdb: implement atomic console enter/leave functions

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
  debug_core,kdb: fix crash when arch does not have single step
  kgdb,x86: use macro HBP_NUM to replace magic number 4
  kgdb,mips: remove unused kgdb_cpu_doing_single_step operations
  mm,kdb,kgdb: Add a debug reference for the kdb kmap usage
  KGDB: Remove set but unused newPC
  ftrace,kdb: Allow dumping a specific cpu's buffer with ftdump
  ftrace,kdb: Extend kdb to be able to dump the ftrace buffer
  kgdb,powerpc: Replace hardcoded offset by BREAK_INSTR_SIZE
  arm,kgdb: Add ability to trap into debugger on notify_die
  gdbstub: do not directly use dbg_reg_def[] in gdb_cmd_reg_set()
  gdbstub: Implement gdbserial 'p' and 'P' packets
  kgdb,arm: Individual register get/set for arm
  kgdb,mips: Individual register get/set for mips
  kgdb,x86: Individual register get/set for x86
  kgdb,kdb: individual register set and and get API
  gdbstub: Optimize kgdb's "thread:" response for the gdb serial protocol
  kgdb: remove custom hex_to_bin()implementation

* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (63 commits)
  of/platform: Register of_platform_drivers with an "of:" prefix
  of/address: Clean up function declarations
  of/spi: call of_register_spi_devices() from spi core code
  of: Provide default of_node_to_nid() implementation.
  of/device: Make of_device_make_bus_id() usable by other code.
  of/irq: Fix endian issues in parsing interrupt specifiers
  of: Fix phandle endian issues
  of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string
  of: remove of_default_bus_ids
  of: make of_find_device_by_node generic
  microblaze: remove references to of_device and to_of_device
  sparc: remove references to of_device and to_of_device
  powerpc: remove references to of_device and to_of_device
  of/device: Replace of_device with platform_device in includes and core code
  of/device: Protect against binding of_platform_drivers to non-OF devices
  of: remove asm/of_device.h
  of: remove asm/of_platform.h
  of/platform: remove all of_bus_type and of_platform_bus_type references
  of: Merge of_platform_bus_type with platform_bus_type
  drivercore/of: Add OF style matching to platform bus
  ...

Fix up trivial conflicts in arch/microblaze/kernel/Makefile due to just
some obj-y removals by the devicetree branch, while the microblaze
updates added a new file.

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:
  apparmor: depends on NET

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
  scripts/dtc: Fix a resource leak
  Documentation: fix ubuntu distro name
  MAINTAINERS: Update kbuild git URLs
  Add support for the C variable in the coccicheck script
  Add scripts/coccinelle/deref_null.cocci
  Add scripts/coccinelle/err_cast.cocci
  Add scripts/coccinelle/resource_size.cocci
  Add scripts/coccinelle/alloc/kzalloc-simple.cocci
  Add scripts/coccinelle/alloc/drop_kmalloc_cast.cocci
  Add Documentation/coccinelle.txt
  Add a target to use the Coccinelle checker
  scripts: decodecode: remove bashisms
  Makefile: clarify a comment
  checkkconfigsymbols.sh: Kconfig symbols sometimes have lowercase letters
  scripts: add nconf into gitignore file

* 'packaging' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
  kbuild: Change section of generated debian packages to kernel
  kbuild: Mark that the packages generated conform to Standards-Version 3.8.4
  kbuild: Add homepage field to debian/control file

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (26 commits)
  kconfig: add savedefconfig
  kconfig: code refactoring in confdata.c
  kconfig: refactor code in symbol.c
  kconfig: add alldefconfig
  kconfig: print more info when we see a recursive dependency
  kconfig: save location of config symbols
  kconfig: change nonint_oldconfig to listnewconfig
  kconfig: rename loose_nonint_oldconfig => oldnoconfig
  kconfig: use long options in conf
  kconfig: fix MODULES-related bug in case of no .config
  kconfig: make randconfig fair for booleans
  kconfig: Don't write invisible choice values
  kbuild: Warn on selecting symbols with unmet direct dependencies
  scripts:conf.c Fix warning: variable 'type' set but not used
  menuconfig: truncate list items
  menuconfig: fix to center checklist correctly in a corner case
  xconfig: add support to show hidden options which have prompts
  xconfig: remove unused function
  xconfig: clean up
  gconfig: fix null pointer warning
  ...

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
  modpost: support objects with more than 64k sections
  trivial: fix a typo in a filename
  frv: clean up arch/frv/Makefile
  kbuild: allow assignment to {A,C}FLAGS_KERNEL on the command line
  kbuild: allow assignment to {A,C,LD}FLAGS_MODULE on the command line
  Kbuild: Add option to set -femit-struct-debug-baseonly
  Makefile: "make kernelrelease" should show the correct full kernel version
  Makefile.build: make KBUILD_SYMTYPES work again

* 'modules' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  module: cleanup comments, remove noinline
  module: group post-relocation functions into post_relocation()
  module: move module args strndup_user to just before use
  module: pass load_info into other functions
  module: fix sysfs cleanup for !CONFIG_SYSFS
  module: sysfs cleanup
  module: layout_and_allocate
  module: fix crash in get_ksymbol() when oopsing in module init
  module: kallsyms functions take struct load_info
  module: refactor out section header rewriting: FIX modversions
  module: refactor out section header rewriting
  module: add load_info
  module: reduce stack usage for each_symbol()
  module: refactor load_module part 5
  module: refactor load_module part 4
  module: refactor load_module part 3
  module: refactor load_module part 2
  module: refactor load_module
  module: module_unload_init() cleanup

* 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  virtio_blk: Remove VBID ioctl
  virtio_blk: Add 'serial' attribute to virtio-blk devices (v2)
  virtio_blk: support barriers without FLUSH feature

* 'upstream/xen' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: (23 commits)
  xen/panic: use xen_reboot and fix smp_send_stop
  Xen: register panic notifier to take crashes of xen guests on panic
  xen: support large numbers of CPUs with vcpu info placement
  xen: drop xen_sched_clock in favour of using plain wallclock time
  pvops: do not notify callers from register_xenstore_notifier
  Introduce CONFIG_XEN_PVHVM compile option
  blkfront: do not create a PV cdrom device if xen_hvm_guest
  support multiple .discard.* sections to avoid section type conflicts
  xen/pvhvm: fix build problem when !CONFIG_XEN
  xenfs: enable for HVM domains too
  x86: Call HVMOP_pagetable_dying on exit_mmap.
  x86: Unplug emulated disks and nics.
  x86: Use xen_vcpuop_clockevent, xen_clocksource and xen wallclock.
  implement O_NONBLOCK for /proc/xen/xenbus
  xen: Fix find_unbound_irq in presence of ioapic irqs.
  xen: Add suspend/resume support for PV on HVM guests.
  xen: Xen PCI platform device driver.
  x86/xen: event channels delivery on HVM.
  x86: early PV on HVM features initialization.
  xen: Add support for HVM hypercalls.
  ...

I'm trying to generate a <set> of <book>s in docbook for wireless to
link together all the cfg80211 and mac80211 documentation.

However, docbook will generate "re01.html" anew for each book for the
first <refentry>, presumably due to a bug in the stylesheets.

An effective workaround is to use IDs for the filenames, which makes
them more descriptive as well, e.g.  API-enum-ieee80211-band.html.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Fixed some typos and wording.
Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Update section 3.7 examples to reflect the current state of the
Makefiles used. Fix spelling and grammar errors along with flow of text.
Signed-off-by: matt mooney <mfm@muteddisk.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Update section 3.2 and 3.5 example, along with text in section 3.5
to reflect change.
Signed-off-by: matt mooney <mfm@muteddisk.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Update section 3.3 Loadable module goals - obj-m, from $(<module_name>-objs)
to $(<module_name>-y) for easier addition of conditional objects to the
module. The examples are also updated to reflect the current state of
each Makefile used.
Signed-off-by: matt mooney <mfm@muteddisk.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Trivial typo fixes.
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

 - sys_io_destroy(): acutually return -EINVAL if the context pointed to
   is invalidIndex: linux-2.6.33-rc4/fs/aio.c
 - sys_io_getevents(): An argument specifying timeout is not `when',
   but `timeout'.
 - sys_io_getevents(): Should describe what is returned if this syscall
   succeeds.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (79 commits)
  powerpc/8xx: Add support for the MPC8xx based boards from TQC
  powerpc/85xx: Introduce support for the Freescale P1022DS reference board
  powerpc/85xx: Adding DTS for the STx GP3-SSA MPC8555 board
  powerpc/85xx: Change deprecated binding for 85xx-based boards
  powerpc/tqm85xx: add a quirk for ti1520 PCMCIA bridge
  powerpc/tqm85xx: update PCI interrupt-map attribute
  powerpc/mpc8308rdb: support for MPC8308RDB board from Freescale
  powerpc/fsl_pci: add quirk for mpc8308 pcie bridge
  powerpc/85xx: Cleanup QE initialization for MPC85xxMDS boards
  powerpc/85xx: Fix booting for P1021MDS boards
  powerpc/85xx: Fix SWIOTLB initalization for MPC85xxMDS boards
  powerpc/85xx: kexec for SMP 85xx BookE systems
  powerpc/5200/i2c: improve i2c bus error recovery
  of/xilinxfb: update tft compatible versions
  powerpc/fsl-diu-fb: Support setting display mode using EDID
  powerpc/5121: doc/dts-bindings: update doc of FSL DIU bindings
  powerpc/5121: shared DIU framebuffer support
  powerpc/5121: move fsl-diu-fb.h to include/linux
  powerpc/5121: fsl-diu-fb: fix issue with re-enabling DIU area descriptor
  powerpc/512x: add clock structure for Video-IN (VIU) unit
  ...

* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (49 commits)
  microblaze: Add KGDB support
  microblaze: Support brki rX, 0x18 for user application debugging
  microblaze: Remove nop after MSRCLR/SET, MTS, MFS instructions
  microblaze: Simplify syscall rutine
  microblaze: Move PT_MODE saving to delay slot
  microblaze: Fix _interrupt function
  microblaze: Fix _user_exception function
  microblaze: Put together addik instructions
  microblaze: Use delay slot in syscall macros
  microblaze: Save kernel mode in delay slot
  microblaze: Do not mix register saving and mode setting
  microblaze: Move SAVE_STATE upward
  microblaze: entry.S: Macro optimization
  microblaze: Optimize hw exception rutine
  microblaze: Implement clear_ums macro and fix SAVE_STATE macro
  microblaze: Remove additional setup for kernel_mode
  microblaze: Optimize SAVE_STATE macro
  microblaze: Remove additional loading
  microblaze: Completely remove working with R11 register
  microblaze: Do not setup BIP in _debug_exception
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  arch/sparc/mm: Use GFP_KERNEL
  MAINTAINERS: Add trailing slash to SBUS path.
  sbus: autoconvert trivial BKL users to private mutex

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] increase ia64 static per cpu area
  [IA64] Put ia64 config files on the Uwe Kleine-König diet
  [IA64] perfmon: convert to unlocked_ioctl
  [IA64] beautify vmlinux.lds.h

* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (150 commits)
  MIPS: PowerTV: Separate PowerTV USB support from non-USB code
  MIPS: strip the un-needed sections of vmlinuz
  MIPS: Clean up the calculation of VMLINUZ_LOAD_ADDRESS
  MIPS: Clean up arch/mips/boot/compressed/decompress.c
  MIPS: Clean up arch/mips/boot/compressed/ld.script
  MIPS: Unify the suffix of compressed vmlinux.bin
  MIPS: PowerTV: Add Gaia platform definitions.
  MIPS: BCM47xx: Fix nvram_getenv return value.
  MIPS: Octeon: Allow more than 3.75GB of memory with PCIe
  MIPS: Clean up notify_die() usage.
  MIPS: Remove unused task_struct.trap_no field.
  Documentation: Mention that KProbes is supported on MIPS
  SAMPLES: kprobe_example: Make it print something on MIPS.
  MIPS: kprobe: Add support.
  MIPS: Add instrunction format for BREAK and SYSCALL
  MIPS: kprobes: Define regs_return_value()
  MIPS: Ritually kill stupid printk.
  MIPS: Octeon: Disallow MSI-X interrupt and fall back to MSI interrupts.
  MIPS: Octeon: Support 256 MSI on PCIe
  MIPS: Decode core number for R2 CPUs.
  ...

Update the kgdb docs to include information about kernel mode setting support.

[Randy Dunlap <rdunlap@xenotime.net>: grammatical corrections]

CC: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

* git://git.kernel.org/pub/scm/linux/kernel/git/czankel/xtensa-2.6:
  xtensa: Disable PCI and nfsroot on simulation target
  xtensa: Add missing include in coprocessor.h
  xtensa: Fix the network driver for the simulator target
  xtensa: Shuffle include statements to fix linker script
  xtensa: Add -mforce-no-pic option is supported
  xtensa: Fixes due to bss boundary symbol name changes.
  xtensa: Fix linker script patch-up
  xtensa: Fix FLUSH_DCACHE macro for some variants.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Commit 5349ef31 (drm/fb: fix
FBIOGET/PUT_VSCREENINFO pixel clock handling) changed the logic of
when a pixclock was valid vs invalid.

The atomic kernel mode setting used by the kernel debugger relies upon
the drm_fb_helper_check_var() to always return -EINVAL.  Until a
better solution exists, this behavior will be restored.

CC: David Airlie <airlied@linux.ie>
CC: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

If the HW compression is left on, the call backs from the HW will
crash the kernel.  The only time this code is called is when kernel
mode setting is in use with kgdb and the kdb shell.

The atomic display pipe handler callback will reset everything when
kgdb restores kernel to the run state.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Airlie <airlied@linux.ie>

Implement atomic kernel mode settings using the fb layer's debug hook
system for supporting debugger interaction.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

Implement the callbacks for KDB entry/exit via the drm helpers.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

Add fb ops to handle enter/exit of the kernel debugger.  If present, the
fb core will register them with KGDB and they'll be called when the
debugger is entered and exited.  The new functions are responsible for
switching to an appropriate debug framebuffer and restoring the
interrupted state at exit time.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

Add the kms keyword processing to kgdboc and the callbacks to invoke
console switching when ever kgdboc is started with "kgdboc=kms,kbd".
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

The kernel console interface stores the number of lines it is
configured to use. The kdb debugger can greatly benefit by knowing how
many lines there are on the console for the pager functionality
without having the end user compile in the setting or have to
repeatedly change it at run time.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
CC: David Airlie <airlied@linux.ie>
CC: Andrew Morton <akpm@linux-foundation.org>

These functions allow the kernel debugger to save and restore the
state of the system console.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
CC: David Airlie <airlied@linux.ie>
CC: Andrew Morton <akpm@linux-foundation.org>

When an arch such as mips and microblaze does not implement either HW
or software single stepping the debug core should re-enter kdb.  The
kdb code will properly ignore the single step operation.  Attempting
to single step the kernel without software or hardware support causes
unpredictable kernel crashes.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>