It's really not right to use 'access_ok()', since that is meant for the
normal "get_user()" and "copy_from/to_user()" accesses, which are done
through the TLB, rather than through the page tables.

Why? access_ok() does both too few, and too many checks.  Too many,
because it is meant for regular kernel accesses that will not honor the
'user' bit in the page tables, and because it honors the USER_DS vs
KERNEL_DS distinction that we shouldn't care about in GUP.  And too few,
because it doesn't do the 'canonical' check on the address on x86-64,
since the TLB will do that for us.

So instead of using a function that isn't meant for this, and does
something else and much more complicated, just do the real rules: we
don't want the range to overflow, and on x86-64, we want it to be a
canonical low address (on 32-bit, all addresses are canonical).
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6: (342 commits)
  Staging: comedi: fix build errors
  Staging: udlfb: update to version 0.2.3
  Staging: udlfb: fix some sparse warnings.
  Staging: udlfb: clean up checkpatch warnings in udlfb.c
  Staging: udlfb: clean up checkpatch warnings in udlfb.h
  Staging: udlfb: add udlfb driver to build
  Staging: add udlfb driver
  Staging: pata_rdc: remove pointless comments
  Staging: pata_rdc: remove DRIVER macros
  Staging: pata_rdc: remove dbgprintf macro
  Staging: pata_rdc: remove broken flag
  Staging: pata_rdc: fix build warnings
  Staging: pata_rdc: use PCI_DEVICE
  Staging: pata_rdc: remove function prototypes
  Staging: pata_rdc: coding style fixes
  Staging: pata_rdc: convert code to work in 2.6.29
  Staging: pata_rdc: add driver to the build system
  Staging: add pata_rdc driver
  Staging: remove obsolete serqt_usb driver
  Staging: serqt_usb2 add the driver to the build
  ...

* 'for-linus' of git://git.infradead.org/users/eparis/notify:
  inotify: inotify_destroy_mark_entry could get called twice

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c: New macro to initialize i2c address lists on the fly
  i2c: Don't advertise i2c functions when not available
  i2c: Use rwsem instead of mutex for board info
  i2c: Add a sysfs interface to instantiate devices
  i2c: Limit core locking to the necessary sections
  i2c: Kill the redundant client list
  i2c: Kill is_newstyle_driver
  i2c: Merge i2c_attach_client into i2c_new_device
  i2c: Drop i2c_probe function
  i2c: Get rid of the legacy binding model
  i2c: Kill client_register and client_unregister methods

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Fix kernel-doc parameter name typo in blk-settings.c:
  block: rename CONFIG_LBD to CONFIG_LBDAF
  block: Fix bounce_pfn setting
  hd: stop defining MAJOR_NR

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6:
  sparc64: Fix UP bootup regression.

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (35 commits)
  powerpc/5121: make clock debug output more readable
  powerpc/5xxx: Add common mpc5xxx_get_bus_frequency() function
  powerpc/5200: Update pcm030.dts to add i2c eeprom and delete cruft
  powerpc/5200: convert mpc52xx_psc_spi to use cs_control callback
  fbdev/xilinxfb: Fix improper casting and tighen up probe path
  usb/ps3: Add missing annotations
  powerpc: Add memory clobber to mtspr()
  powerpc: Fix invalid construct in our CPU selection Kconfig
  ps3rom: Use ps3_system_bus_[gs]et_drvdata() instead of direct access
  powerpc: Add configurable -Werror for arch/powerpc
  of_serial: Add UPF_FIXED_TYPE flag
  drivers/hvc: Add missing __devexit_p()
  net/ps3: gelic - Add missing annotations
  powerpc: Introduce macro spin_event_timeout()
  powerpc/warp: Fix ISA_DMA_THRESHOLD default
  powerpc/bootwrapper: Custom build options for XPedite52xx targets
  powerpc/85xx: Add defconfig for X-ES MPC85xx boards
  powerpc/85xx: Add dts files for X-ES MPC85xx boards
  powerpc/85xx: Add platform support for X-ES MPC85xx boards
  83xx: add support for the kmeter1 board.
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
  Blackfin: convert page/tlb to asm-generic
  Blackfin: convert types to asm-generic
  Blackfin: convert irq/process to asm-generic
  Blackfin: convert signal/mmap to asm-generic
  Blackfin: convert locking primitives to asm-generic
  Blackfin: convert termios to asm-generic
  Blackfin: convert simple headers to asm-generic
  Blackfin: convert socket/poll to asm-generic
  Blackfin: convert user/elf to asm-generic
  Blackfin: convert shm/sysv/ipc to asm-generic
  Blackfin: convert asm/ioctls.h to asm-generic/ioctls.h
  Blackfin: only build irqpanic.c when needed
  Blackfin: pull in asm/io.h in ksyms for prototypes
  Blackfin: use common test_bit() rather than __test_bit()

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Sergey Lapin <slapin@ossfans.org>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Joe Perches <joe@perches.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Bob Copeland <me@bobcopeland.com>
Cc: "Luis R . Rodriguez" <lrodriguez@atheros.com>
Cc: Nick Kossifidis <mickflemm@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Do not accept VESA modes by the "vga=" kernel parameter if there is no
frame buffer driver compiled-in to handle it.

Also, there is a comment added to the Kconfig description after Werner
Lemberg's suggestion

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13249Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Reported-by: Werner Lemberg <wl@gnu.org>
Cc: Michal Januszewski <spock@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Ranganathan Desikan <rdesikan@jetzbroadband.com>
Cc: "Arvind R." <arvind@acarlab.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

dma_sync_single() and dma_sync_sg() have been described as "Backwards
compat, remove in 2.7.x" for a long time (since 2.6.5).

This marks dma_sync_single() and dma_sync_sg() as deprecated so the users
get notified before removing them.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Mark them deprecated so that out-of-tree developers get notified about
this before their modules break when these macros are removed.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Yang Hongyang <yanghy@cn.fujitsu.com>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

We're about to make DMA_nnBIT_MASK() emit `deprecated' warnings.  Convert the
remaining stragglers which are visible to the x86_64 build.

Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Eric Moore <Eric.Moore@lsil.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Yi Zou <yi.zou@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In moxa.c there are 32 minor numbers reserved for each device.  The number
of ports actually available per device is stored in
moxa_board_conf->numPorts.  This number is not considered in moxa_open().
Opening a port that is not available results in a kernel oops.  This patch
adds a test to moxa_open() that prevents opening unavailable ports.

[akpm@linux-foundation.org: avoid multiple returns]
Signed-off-by: Dirk Eibach <eibach@gdsys.de>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The remove member of the pci_driver stli_pcidriver uses __devexit_p(), so
the remove function itself should be marked with __devexit.  Even more so
considering the probe function is marked with __devinit.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

With a postfix increment retries is incremented beyond DTLK_MAX_RETRIES so
the error message is not displayed correctly.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: James R. Van Zandt <jrv@vanzandt.mv.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The bug is ancient.

If we trace the sub-thread of our natural child and this sub-thread exits,
we update parent->signal->cxxx fields.  But we should not do this until
the whole thread-group exits, otherwise we account this thread (and all
other live threads) twice.

Add the task_detached() check.  No need to check thread_group_empty(),
wait_consider_task()->delay_group_leader() already did this.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Roland McGrath <roland@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Vitaly Mayatskikh <vmayatsk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The rtc_update_irq() might be called with irqs enabled, if a interrupt
handler was registered without IRQF_DISABLED.  Use
spin_lock_irqsave/spin_unlock_irqrestore instead of spin_lock/spin_unlock.

Also update kerneldoc and drivers which do extra work to follow the
current interface spec, as suggestted by David Brownell.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Since we renamed the file, we might want to rename the file internals too.

Though we don't bother with changing platform driver name and platform
module alias.  The stuff is legacy and hopefully we'll remove it soon.
Suggested-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The driver handles MPC83xx, MPC85xx and MPC86xx SPI controllers, so rename
the file for clarity.
Suggested-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This patch removes #if 0'ed code, and spi_mpc83xx->busy variable that is
used by that dead snippet only.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mpc83xx_spi_work() is quite large, with up to five indentation levels and
is quite difficult to read.

So, split the function in two parts:
1. mpc83xx_spi_work() now only traverse queued spi messages;
2. mpc83xx_spi_do_one_msg() only manages single messages.

There should be no functional changes.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Checkpatch is spitting errors when seeing the rename patch, so fix the
errors prior to moving.

Following errors and warnings were fixed:

   WARNING: Use #include <linux/io.h> instead of <asm/io.h>
   #1027: FILE: drivers/spi/spi_mpc8xxx.c:37:
   +#include <asm/io.h>

   ERROR: "foo * bar" should be "foo *bar"
   #1111: FILE: drivers/spi/spi_mpc8xxx.c:121:
   +static inline void mpc83xx_spi_write_reg(__be32 __iomem * reg, u32 val)

   ERROR: "foo * bar" should be "foo *bar"
   #1116: FILE: drivers/spi/spi_mpc8xxx.c:126:
   +static inline u32 mpc83xx_spi_read_reg(__be32 __iomem * reg)

   ERROR: "foo * bar" should be "foo *bar"
   #1125: FILE: drivers/spi/spi_mpc8xxx.c:135:
   +       type * rx = mpc83xx_spi->rx;                                      \

   ERROR: "foo * bar" should be "foo *bar"
   #1135: FILE: drivers/spi/spi_mpc8xxx.c:145:
   +       const type * tx = mpc83xx_spi->tx;                      \

   WARNING: suspect code indent for conditional statements (16, 25)
   #1504: FILE: drivers/spi/spi_mpc8xxx.c:514:
   +               while (((event =
   [...]
   +                        cpu_relax();

Following warnings were left over, since fixing them will hurt the
readability.  We'd better fix them by lowering the indentation level by
splitting mpc83xx_spi_work function into two parts.

   WARNING: line over 80 characters
   #1371: FILE: drivers/spi/spi_mpc8xxx.c:381:
   +                                       status = mpc83xx_spi_setup_transfer(spi, t);

   WARNING: line over 80 characters
   #1392: FILE: drivers/spi/spi_mpc8xxx.c:402:
   +                               mpc83xx_spi_chipselect(spi, BITBANG_CS_INACTIVE);
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This patch adds spi and mmc-spi-slot nodes, plus a gpio-controller for
PIXIS' sdcsr bank that is used for managing SPI chip-select and for
reading card's states.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This is needed for some underlaying GPIO controllers that may be a bit
slow, or if chip-select signal need some time to stabilize.

For what it's worth, we already have the similar delay for chip-select
de-assertion case.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When a platform is running at high frequencies it's not always possible to
scale-down a frequency to a requested value, and using mmc_spi driver this
leads to the following printk flood during card polling:

  ...
  mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use
  520828 Hz instead.
  mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use
  520828 Hz instead.
  ...

Fix this by using WARN_ONCE(), it's better than the flood, and also better
than turning dev_err() into dev_dbg(), since we actually want to warn that
some things may not work correctly.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

With this patch we'll able to select spi_mpc83xx driver on the MPC86xx
platforms.  Let the driver depend on FSL_SOC, so we don't have to worry
about Kconfig anymore.

Also remove the "experimental" dependency, the driver has been tested to
work on a various hardware, and surely not experimental anymore.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: David Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This is a driver for the ARM PrimeCell PL061 GPIO AMBA peripheral.  The
driver is implemented using the gpiolib framework.

This driver also includes support for the use of the PL061 as an interrupt
controller (secondary).
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Some of the comedi drivers need timer.h to build properly, so put it
in the comedidev.h file to fix these errors.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

This updates the udlfb to the 0.2.3 version.

From: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

There are others remaining due to the __iomem namespace of the
framebuffer data pointer.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

This cleans up a bunch of checkpatch.pl warnings in the udlfb.c file.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

This cleans up a bunch of checkpatch.pl warnings in the udlfb.h file.

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

This adds the udlfb driver to the build system

Cc: Roberto De Ioris <roberto@unbit.it>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>