~shefty/rdma-dev.git
10 years agoMerge branch 'ux500/devel' into next/devel
Olof Johansson [Tue, 20 Dec 2011 18:05:29 +0000 (10:05 -0800)]
Merge branch 'ux500/devel' into next/devel

* ux500/devel:
  ARM: ux500: fix the smp_twd clock calculation
  ARM: ux500: remove support for early silicon revisions
  ARM: ux500: update register files
  ARM: ux500: register DB5500 PMU dynamically
  ARM: ux500: update ASIC detection for U5500
  ARM: ux500: support DB8520

10 years agoMerge branch 'picoxcell/devel' into next/devel
Olof Johansson [Tue, 20 Dec 2011 05:12:47 +0000 (21:12 -0800)]
Merge branch 'picoxcell/devel' into next/devel

* picoxcell/devel: (1 commit)
  ARM: picoxcell: implement watchdog restart

10 years agoARM: ux500: fix the smp_twd clock calculation
Linus Walleij [Sun, 18 Dec 2011 23:28:50 +0000 (00:28 +0100)]
ARM: ux500: fix the smp_twd clock calculation

The clock for the smp_twd block is not equal to the CPU
frequency, actually it is divided by two, so fix this,
and set the initial frequency to half of 1GHz which is
the most common case.

Reported-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: remove support for early silicon revisions
Linus Walleij [Thu, 15 Dec 2011 12:38:40 +0000 (13:38 +0100)]
ARM: ux500: remove support for early silicon revisions

The DB8500 ED (Early Drop) and V1 are only available inside of
ST-Ericsson or partners, we have actively replaced and scrapped
these prototypes. All Nova products on the open market (such as
the Snowball board) are based on V2 and later ASIC variants.
So let us focus on supporting the silicon that will be used and
delete this to get a clear overview.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: update register files
Linus Walleij [Thu, 15 Dec 2011 10:56:23 +0000 (11:56 +0100)]
ARM: ux500: update register files

A few new addresses for newly supported peripherals and SRAM base
offsets.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: register DB5500 PMU dynamically
Rabin Vincent [Thu, 15 Dec 2011 10:49:43 +0000 (11:49 +0100)]
ARM: ux500: register DB5500 PMU dynamically

Use platform_device_register_simple() rather than a static
struct, so we create and register the PMU device on-the-fly.

Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: update ASIC detection for U5500
Linus Walleij [Thu, 15 Dec 2011 10:41:09 +0000 (11:41 +0100)]
ARM: ux500: update ASIC detection for U5500

This adds a few CPU identification functions for the U5500 variants.
Contains portions of code written by Rabin Vincent.

Cc: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: support DB8520
Rabin Vincent [Thu, 15 Dec 2011 10:08:22 +0000 (11:08 +0100)]
ARM: ux500: support DB8520

Extend the ux500 ID table to cover the DB8520 variant.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: picoxcell: implement watchdog restart
Jamie Iles [Sat, 17 Dec 2011 13:42:37 +0000 (13:42 +0000)]
ARM: picoxcell: implement watchdog restart

Allow the platform to be restarted by triggering the watchdog to expire
with the shortest possible expiry.  This should reset the CPU core and
all on-chip peripherals.

v2: - use writel_relaxed().

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
10 years agoMAINTAINERS: add maintainer entry for Picochip picoxcell
Jamie Iles [Mon, 12 Dec 2011 20:28:42 +0000 (20:28 +0000)]
MAINTAINERS: add maintainer entry for Picochip picoxcell

Add maintainer entry for the picoxcell machine support and associated
drivers.

v2: - add 2-level pattern for drivers

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
10 years agoARM: picoxcell: move io mappings to common.c
Jamie Iles [Mon, 12 Dec 2011 20:21:39 +0000 (20:21 +0000)]
ARM: picoxcell: move io mappings to common.c

Now that we have lost our machine specific ioremap() we just have one
mapping that covers all peripherals.  Move this to common.c to simplify
things a little.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
10 years agoARM: picoxcell: don't reserve irq_descs
Jamie Iles [Mon, 12 Dec 2011 20:17:37 +0000 (20:17 +0000)]
ARM: picoxcell: don't reserve irq_descs

All irq_desc's are now dynamically allocated so we don't need to
statically reserve them.

v2: - select SPARSE_IRQ and set .nr_irqs to NR_IRQS_LEGACY to skip
ISA and IRQ 0.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
10 years agoARM: picoxcell: remove mach/memory.h
Jamie Iles [Mon, 12 Dec 2011 20:06:49 +0000 (20:06 +0000)]
ARM: picoxcell: remove mach/memory.h

mach/memory.h is no longer required for simple platforms so remove it
for picoxcell.

Signed-off-by: Jamie Iles <jamie@jamieiles.com>
10 years agoMerge branch 'davinci/features' into next/devel
Olof Johansson [Fri, 16 Dec 2011 05:59:39 +0000 (21:59 -0800)]
Merge branch 'davinci/features' into next/devel

* davinci/features:
  ARM: davinci: add support for multiple power domains

10 years agoMerge branch 'v3.3/features' of git://gitorious.org/linux-davinci/linux-davinci into...
Olof Johansson [Fri, 16 Dec 2011 05:07:10 +0000 (21:07 -0800)]
Merge branch 'v3.3/features' of git://gitorious.org/linux-davinci/linux-davinci into davinci/features

10 years agoMerge branch 'orion/devel' into next/devel
Olof Johansson [Wed, 14 Dec 2011 03:35:03 +0000 (19:35 -0800)]
Merge branch 'orion/devel' into next/devel

10 years agoARM: Orion: Remove address map info from all platform data structures
Andrew Lunn [Wed, 7 Dec 2011 20:48:08 +0000 (21:48 +0100)]
ARM: Orion: Remove address map info from all platform data structures

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Michael Walle <michael@walle.cc>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoARM: Orion: Get address map from plat-orion instead of via platform_data
Andrew Lunn [Wed, 7 Dec 2011 20:48:07 +0000 (21:48 +0100)]
ARM: Orion: Get address map from plat-orion instead of via platform_data

Use an getter function in plat-orion/addr-map.c to get the address map
structure, rather than pass it to drivers in the platform_data
structures. When the drivers are built for none orion platforms, a
dummy function is provided instead which returns NULL.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Michael Walle <michael@walle.cc>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoARM: Orion: mbus_dram_info consolidation
Andrew Lunn [Wed, 7 Dec 2011 20:48:06 +0000 (21:48 +0100)]
ARM: Orion: mbus_dram_info consolidation

Move the *_mbus_dram_info structure into the orion platform and call it
orion_mbus_dram_info everywhere.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Michael Walle <michael@walle.cc>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoARM: Orion: Consolidate the address map setup
Andrew Lunn [Wed, 7 Dec 2011 20:48:05 +0000 (21:48 +0100)]
ARM: Orion: Consolidate the address map setup

Compile tested on Dove, orion5x, mv78xx0. Boot tested on Kirkwood.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Michael Walle <michael@walle.cc>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoARM: Kirkwood: Add configuration for MPP12 as GPIO
Arnaud Patard [Thu, 1 Dec 2011 10:58:25 +0000 (11:58 +0100)]
ARM: Kirkwood: Add configuration for MPP12 as GPIO

The MPP12 is listed in the 6281 HW manual as output only but the iconnect
board from iomega is using it as GPIO (there's a button connected on it). So,
I'm adding a definition for the MPP12 as GPIO. As I've no informations about
this and which kirkwood are "affected", I'm adding a new #define instead of
modifying the current one for MPP12.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoARM: Kirkwood: Recognize A1 revision of 6282 chip
Martin Michlmayr [Thu, 3 Nov 2011 12:57:43 +0000 (12:57 +0000)]
ARM: Kirkwood: Recognize A1 revision of 6282 chip

Recognize the Kirkwood 6282 revision A1 chip since products using
this chip are shipping now, such as the QNAP TS-x19P II devices.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
10 years agoMerge branch 'highbank/devel' into next/devel
Olof Johansson [Tue, 13 Dec 2011 23:01:23 +0000 (15:01 -0800)]
Merge branch 'highbank/devel' into next/devel

10 years agoMerge branch 'for-3.3' of git://sources.calxeda.com/kernel/linux into highbank/devel
Olof Johansson [Tue, 13 Dec 2011 23:01:07 +0000 (15:01 -0800)]
Merge branch 'for-3.3' of git://sources.calxeda.com/kernel/linux into highbank/devel

10 years agoMerge branch 'ux500/devel' into next/devel
Olof Johansson [Tue, 13 Dec 2011 20:18:29 +0000 (12:18 -0800)]
Merge branch 'ux500/devel' into next/devel

10 years agoARM: kexec: use soft_restart for branching to the reboot buffer
Will Deacon [Mon, 6 Jun 2011 11:35:46 +0000 (12:35 +0100)]
ARM: kexec: use soft_restart for branching to the reboot buffer

Now that there is a common way to reset the machine, let's use it
instead of reinventing the wheel in the kexec backend.

Signed-off-by: Will Deacon <will.deacon@arm.com>
10 years agoARM: stop: execute platform callback from cpu_stop code
Will Deacon [Mon, 6 Jun 2011 14:49:23 +0000 (15:49 +0100)]
ARM: stop: execute platform callback from cpu_stop code

Sending IPI_CPU_STOP to a CPU causes it to execute a busy cpu_relax
loop forever. This makes it impossible to kexec successfully on an SMP
system since the secondary CPUs do not reset.

This patch adds a callback to platform_cpu_kill, defined when
CONFIG_HOTPLUG_CPU=y, from the ipi_cpu_stop handling code. This function
currently just returns 1 on all platforms that define it but allows them
to do something more sophisticated in the future.

Signed-off-by: Will Deacon <will.deacon@arm.com>
10 years agoARM: reset: implement soft_restart for jumping to a physical address
Will Deacon [Mon, 6 Jun 2011 11:28:54 +0000 (12:28 +0100)]
ARM: reset: implement soft_restart for jumping to a physical address

Tools such as kexec and CPU hotplug require a way to reset the processor
and branch to some code in physical space. This requires various bits of
jiggery pokery with the caches and MMU which, when it goes wrong, tends
to lock up the system.

This patch fleshes out the soft_restart implementation so that it
branches to the reset code using the identity mapping. This requires us
to change to a temporary stack, held within the kernel image as a static
array, to avoid conflicting with the new view of memory.

Signed-off-by: Will Deacon <will.deacon@arm.com>
10 years agoARM: lib: add call_with_stack function for safely changing stack
Will Deacon [Wed, 8 Jun 2011 14:29:00 +0000 (15:29 +0100)]
ARM: lib: add call_with_stack function for safely changing stack

When disabling the MMU, it is necessary to take out a 1:1 identity map
of the reset code so that it can safely be executed with and without
the MMU active. To avoid the situation where the physical address of the
reset code aliases with the virtual address of the active stack (which
cannot be included in the 1:1 mapping), it is desirable to change to a
new stack at a location which is less likely to alias.

This code adds a new lib function, call_with_stack:

void call_with_stack(void (*fn)(void *), void *arg, void *sp);

which changes the stack to point at the sp parameter, before invoking
fn(arg) with the new stack selected.

Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
10 years agoARM: ux500: update the MOP500 GPIO assignments
Linus Walleij [Fri, 11 Nov 2011 17:48:52 +0000 (18:48 +0100)]
ARM: ux500: update the MOP500 GPIO assignments

This is a more complete list of the MOP500 GPIO pins, especially
for those used with the Snowball board. Sort GPIO number in
falling number order so there is some structure to this file.
Fix some whitespace issues in the process.

Cc: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: add device sdi1 for SDIO
Stefan Nilsson XK [Wed, 26 Oct 2011 08:50:42 +0000 (10:50 +0200)]
ARM: ux500: add device sdi1 for SDIO

Adds device sdi1 for ST-Ericsson HREFv60 and later to enable
the possiblity of using the onboard CW1200 chip for WLAN.

Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoARM: ux500: support SD cards on HREFv60 boards
Stefan Nilsson XK [Wed, 26 Oct 2011 08:49:35 +0000 (10:49 +0200)]
ARM: ux500: support SD cards on HREFv60 boards

Properly support the correct SDI-init sequence on the
ST-Ericsson HREFv60 and later boards in order to get
support for SD cards.

Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
10 years agoMerge branch 'omap/omap1' into next/devel
Olof Johansson [Sun, 11 Dec 2011 23:57:59 +0000 (15:57 -0800)]
Merge branch 'omap/omap1' into next/devel

10 years agoARM: 7183/1: vic: register the VIC for ST-modified VIC's
Jamie Iles [Thu, 1 Dec 2011 10:16:46 +0000 (11:16 +0100)]
ARM: 7183/1: vic: register the VIC for ST-modified VIC's

When probing the VIC, the ST variant has a different probing method to
account for the extra interrupts which meant we didn't previously call
vic_register() which registered the irq_domain.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoLinux 3.2-rc5
Linus Torvalds [Fri, 9 Dec 2011 23:09:32 +0000 (15:09 -0800)]
Linux 3.2-rc5

10 years agoMerge git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 9 Dec 2011 22:45:44 +0000 (14:45 -0800)]
Merge git://git.samba.org/sfrench/cifs-2.6

* git://git.samba.org/sfrench/cifs-2.6:
  cifs: check for NULL last_entry before calling cifs_save_resume_key
  cifs: attempt to freeze while looping on a receive attempt
  cifs: Fix sparse warning when calling cifs_strtoUCS
  CIFS: Add descriptions to the brlock cache functions

10 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 9 Dec 2011 22:45:12 +0000 (14:45 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, efi: Calling __pa() with an ioremap()ed address is invalid
  x86, hpet: Immediately disable HPET timer 1 if rtc irq is masked
  x86/intel_mid: Kconfig select fix
  x86/intel_mid: Fix the Kconfig for MID selection

10 years agoMerge branch 'spi/for-3.2' of git://git.pengutronix.de/git/wsa/linux-2.6
Linus Torvalds [Fri, 9 Dec 2011 22:41:50 +0000 (14:41 -0800)]
Merge branch 'spi/for-3.2' of git://git.pengutronix.de/git/wsa/linux-2.6

* 'spi/for-3.2' of git://git.pengutronix.de/git/wsa/linux-2.6:
  spi/gpio: fix section mismatch warning
  spi/fsl-espi: disable CONFIG_SPI_FSL_ESPI=m build
  spi/nuc900: Include linux/module.h
  spi/ath79: fix compile error due to missing include

10 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Fri, 9 Dec 2011 16:18:08 +0000 (08:18 -0800)]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: raid5 crash during degradation
  md/raid5: never wait for bad-block acks on failed device.
  md: ensure new badblocks are handled promptly.
  md: bad blocks shouldn't cause a Blocked status on a Faulty device.
  md: take a reference to mddev during sysfs access.
  md: refine interpretation of "hold_active == UNTIL_IOCTL".
  md/lock: ensure updates to page_attrs are properly locked.

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Linus Torvalds [Fri, 9 Dec 2011 16:08:57 +0000 (08:08 -0800)]
Merge git://git./linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: use new generic {enable,disable}_percpu_irq() routines
  drivers/net/ethernet/tile: use skb_frag_page() API
  asm-generic/unistd.h: support new process_vm_{readv,write} syscalls
  arch/tile: fix double-free bug in homecache_free_pages()
  arch/tile: add a few #includes and an EXPORT to catch up with kernel changes.

10 years agoMerge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
Linus Torvalds [Fri, 9 Dec 2011 16:08:14 +0000 (08:08 -0800)]
Merge branch 'iommu/fixes' of git://git./linux/kernel/git/joro/iommu

* 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  MAINTAINERS: Update amd-iommu F: patterns
  iommu/amd: Fix typo in kernel-parameters.txt
  iommu/msm: Fix compile error in mach-msm/devices-iommu.c
  Fix comparison using wrong pointer variable in dma debug code

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Fri, 9 Dec 2011 16:07:42 +0000 (08:07 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - Fix lost speaker volume controls
  ALSA: hda/realtek - Create "Bass Speaker" for two speaker pins
  ALSA: hda/realtek - Don't create extra controls with channel suffix
  ALSA: hda - Fix remaining VREF mute-LED NID check in post-3.1 changes
  ALSA: hda - Fix GPIO LED setup for IDT 92HD75 codecs
  ASoC: Provide a more complete DMA driver stub
  ASoC: Remove references to corgi and spitz from machine driver document
  ASoC: Make SND_SOC_MX27VIS_AIC32X4 depend on I2C
  ASoC: Fix dependency for SND_SOC_RAUMFELD and SND_PXA2XX_SOC_HX4700
  ASoC: uda1380: Return proper error in uda1380_modinit failure path
  ASoC: kirkwood: Make SND_KIRKWOOD_SOC_OPENRD and SND_KIRKWOOD_SOC_T5325 depend on I2C
  ASoC: Mark WM8994 ADC muxes as virtual
  ALSA: hda/realtek - Fix Oops in alc_mux_select()
  ALSA: sis7019 - give slow codecs more time to reset

10 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 9 Dec 2011 16:07:24 +0000 (08:07 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Do no try to schedule task events if there are none
  lockdep, kmemcheck: Annotate ->lock in lockdep_init_map()
  perf header: Use event_name() to get an event name
  perf stat: Failure with "Operation not supported"

10 years agosys_getppid: add missing rcu_dereference
Mandeep Singh Baines [Thu, 8 Dec 2011 22:34:44 +0000 (14:34 -0800)]
sys_getppid: add missing rcu_dereference

In order to safely dereference current->real_parent inside an
rcu_read_lock, we need an rcu_dereference.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agorapidio/tsi721: modify PCIe capability settings
Alexandre Bounine [Thu, 8 Dec 2011 22:34:42 +0000 (14:34 -0800)]
rapidio/tsi721: modify PCIe capability settings

Modify initialization of PCIe capability registers in Tsi721 mport driver:
 - change Completion Timeout value to avoid unexpected data transfer
   aborts during intensive traffic.
 - replace hardcoded offset of PCIe capability block by making it use the
   common function.

This patch is applicable to kernel versions starting from 3.2-rc1.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agorapidio/tsi721: fix mailbox resource reporting
Alexandre Bounine [Thu, 8 Dec 2011 22:34:36 +0000 (14:34 -0800)]
rapidio/tsi721: fix mailbox resource reporting

Bug fix for Tsi721 RapidIO mport driver: Tsi721 supports four RapidIO
mailboxes (MBOX0 - MBOX3) as defined by RapidIO specification.  Mailbox
resources has to be properly reported to allow use of all available
mailboxes (initial version reports only MBOX0).

This patch is applicable to kernel versions staring from 3.2-rc1.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agorapidio/tsi721: switch to dma_zalloc_coherent
Alexandre Bounine [Thu, 8 Dec 2011 22:34:35 +0000 (14:34 -0800)]
rapidio/tsi721: switch to dma_zalloc_coherent

Replace the pair dma_alloc_coherent()+memset() with the new
dma_zalloc_coherent() added by Andrew Morton for kernel version 3.2

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoprocfs: do not overflow get_{idle,iowait}_time for nohz
Michal Hocko [Thu, 8 Dec 2011 22:34:32 +0000 (14:34 -0800)]
procfs: do not overflow get_{idle,iowait}_time for nohz

Since commit a25cac5198d4 ("proc: Consider NO_HZ when printing idle and
iowait times") we are reporting idle/io_wait time also while a CPU is
tickless.  We rely on get_{idle,iowait}_time functions to retrieve
proper data.

These functions, however, use usecs_to_cputime to translate micro
seconds time to cputime64_t.  This is just an alias to usecs_to_jiffies
which reduces the data type from u64 to unsigned int and also checks
whether the given parameter overflows jiffies_to_usecs(MAX_JIFFY_OFFSET)
and returns MAX_JIFFY_OFFSET in that case.

When we overflow depends on CONFIG_HZ but especially for CONFIG_HZ_300
it is quite low (1431649781) so we are getting MAX_JIFFY_OFFSET for
>3000s! until we overflow unsigned int.  Just for reference
CONFIG_HZ_100 has an overflow window around 20s, CONFIG_HZ_250 ~8s and
CONFIG_HZ_1000 ~2s.

This results in a bug when people saw [h]top going mad reporting 100%
CPU usage even though there was basically no CPU load.  The reason was
simply that /proc/stat stopped reporting idle/io_wait changes (and
reported MAX_JIFFY_OFFSET) and so the only change happening was for user
system time.

Let's use nsecs_to_jiffies64 instead which doesn't reduce the precision
to 32b type and it is much more appropriate for cumulative time values
(unlike usecs_to_jiffies which intended for timeout calculations).

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Artem S. Tashkinov <t.artem@mailcity.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agomm: vmalloc: check for page allocation failure before vmlist insertion
Mel Gorman [Thu, 8 Dec 2011 22:34:30 +0000 (14:34 -0800)]
mm: vmalloc: check for page allocation failure before vmlist insertion

Commit f5252e00 ("mm: avoid null pointer access in vm_struct via
/proc/vmallocinfo") adds newly allocated vm_structs to the vmlist after
it is fully initialised.  Unfortunately, it did not check that
__vmalloc_area_node() successfully populated the area.  In the event of
allocation failure, the vmalloc area is freed but the pointer to freed
memory is inserted into the vmlist leading to a a crash later in
get_vmalloc_info().

This patch adds a check for ____vmalloc_area_node() failure within
__vmalloc_node_range.  It does not use "goto fail" as in the previous
error path as a warning was already displayed by __vmalloc_area_node()
before it called vfree in its failure path.

Credit goes to Luciano Chavez for doing all the real work of identifying
exactly where the problem was.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reported-by: Luciano Chavez <lnx1138@linux.vnet.ibm.com>
Tested-by: Luciano Chavez <lnx1138@linux.vnet.ibm.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org> [3.1.x+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agomm: Ensure that pfn_valid() is called once per pageblock when reserving pageblocks
Michal Hocko [Thu, 8 Dec 2011 22:34:27 +0000 (14:34 -0800)]
mm: Ensure that pfn_valid() is called once per pageblock when reserving pageblocks

setup_zone_migrate_reserve() expects that zone->start_pfn starts at
pageblock_nr_pages aligned pfn otherwise we could access beyond an
existing memblock resulting in the following panic if
CONFIG_HOLES_IN_ZONE is not configured and we do not check pfn_valid:

  IP: [<c02d331d>] setup_zone_migrate_reserve+0xcd/0x180
  *pdpt = 0000000000000000 *pde = f000ff53f000ff53
  Oops: 0000 [#1] SMP
  Pid: 1, comm: swapper Not tainted 3.0.7-0.7-pae #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
  EIP: 0060:[<c02d331d>] EFLAGS: 00010006 CPU: 0
  EIP is at setup_zone_migrate_reserve+0xcd/0x180
  EAX: 000c0000 EBX: f5801fc0 ECX: 000c0000 EDX: 00000000
  ESI: 000c01fe EDI: 000c01fe EBP: 00140000 ESP: f2475f58
  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
  Process swapper (pid: 1, ti=f2474000 task=f2472cd0 task.ti=f2474000)
  Call Trace:
  [<c02d389c>] __setup_per_zone_wmarks+0xec/0x160
  [<c02d3a1f>] setup_per_zone_wmarks+0xf/0x20
  [<c08a771c>] init_per_zone_wmark_min+0x27/0x86
  [<c020111b>] do_one_initcall+0x2b/0x160
  [<c086639d>] kernel_init+0xbe/0x157
  [<c05cae26>] kernel_thread_helper+0x6/0xd
  Code: a5 39 f5 89 f7 0f 46 fd 39 cf 76 40 8b 03 f6 c4 08 74 32 eb 91 90 89 c8 c1 e8 0e 0f be 80 80 2f 86 c0 8b 14 85 60 2f 86 c0 89 c8 <2b> 82 b4 12 00 00 c1 e0 05 03 82 ac 12 00 00 8b 00 f6 c4 08 0f
  EIP: [<c02d331d>] setup_zone_migrate_reserve+0xcd/0x180 SS:ESP 0068:f2475f58
  CR2: 00000000000012b4

We crashed in pageblock_is_reserved() when accessing pfn 0xc0000 because
highstart_pfn = 0x36ffe.

The issue was introduced in 3.0-rc1 by 6d3163ce ("mm: check if any page
in a pageblock is reserved before marking it MIGRATE_RESERVE").

Make sure that start_pfn is always aligned to pageblock_nr_pages to
ensure that pfn_valid s always called at the start of each pageblock.
Architectures with holes in pageblocks will be correctly handled by
pfn_valid_within in pageblock_is_reserved.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Tested-by: Dang Bo <bdang@vmware.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Arve Hjnnevg <arve@android.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> [3.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agomm/migrate.c: pair unlock_page() and lock_page() when migrating huge pages
Hillf Danton [Thu, 8 Dec 2011 22:34:20 +0000 (14:34 -0800)]
mm/migrate.c: pair unlock_page() and lock_page() when migrating huge pages

Avoid unlocking and unlocked page if we failed to lock it.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agothp: set compound tail page _count to zero
Youquan Song [Thu, 8 Dec 2011 22:34:18 +0000 (14:34 -0800)]
thp: set compound tail page _count to zero

Commit 70b50f94f1644 ("mm: thp: tail page refcounting fix") keeps all
page_tail->_count zero at all times.  But the current kernel does not
set page_tail->_count to zero if a 1GB page is utilized.  So when an
IOMMU 1GB page is used by KVM, it wil result in a kernel oops because a
tail page's _count does not equal zero.

  kernel BUG at include/linux/mm.h:386!
  invalid opcode: 0000 [#1] SMP
  Call Trace:
    gup_pud_range+0xb8/0x19d
    get_user_pages_fast+0xcb/0x192
    ? trace_hardirqs_off+0xd/0xf
    hva_to_pfn+0x119/0x2f2
    gfn_to_pfn_memslot+0x2c/0x2e
    kvm_iommu_map_pages+0xfd/0x1c1
    kvm_iommu_map_memslots+0x7c/0xbd
    kvm_iommu_map_guest+0xaa/0xbf
    kvm_vm_ioctl_assigned_device+0x2ef/0xa47
    kvm_vm_ioctl+0x36c/0x3a2
    do_vfs_ioctl+0x49e/0x4e4
    sys_ioctl+0x5a/0x7c
    system_call_fastpath+0x16/0x1b
  RIP  gup_huge_pud+0xf2/0x159

Signed-off-by: Youquan Song <youquan.song@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agothp: add compound tail page _mapcount when mapped
Youquan Song [Thu, 8 Dec 2011 22:34:16 +0000 (14:34 -0800)]
thp: add compound tail page _mapcount when mapped

With the 3.2-rc kernel, IOMMU 2M pages in KVM works.  But when I tried
to use IOMMU 1GB pages in KVM, I encountered an oops and the 1GB page
failed to be used.

The root cause is that 1GB page allocation calls gup_huge_pud() while 2M
page calls gup_huge_pmd.  If compound pages are used and the page is a
tail page, gup_huge_pmd() increases _mapcount to record tail page are
mapped while gup_huge_pud does not do that.

So when the mapped page is relesed, it will result in kernel oops
because the page is not marked mapped.

This patch add tail process for compound page in 1GB huge page which
keeps the same process as 2M page.

Reproduce like:
1. Add grub boot option: hugepagesz=1G hugepages=8
2. mount -t hugetlbfs -o pagesize=1G hugetlbfs /dev/hugepages
3. qemu-kvm -m 2048 -hda os-kvm.img -cpu kvm64 -smp 4 -mem-path /dev/hugepages
-net none -device pci-assign,host=07:00.1

  kernel BUG at mm/swap.c:114!
  invalid opcode: 0000 [#1] SMP
  Call Trace:
    put_page+0x15/0x37
    kvm_release_pfn_clean+0x31/0x36
    kvm_iommu_put_pages+0x94/0xb1
    kvm_iommu_unmap_memslots+0x80/0xb6
    kvm_assign_device+0xba/0x117
    kvm_vm_ioctl_assigned_device+0x301/0xa47
    kvm_vm_ioctl+0x36c/0x3a2
    do_vfs_ioctl+0x49e/0x4e4
    sys_ioctl+0x5a/0x7c
    system_call_fastpath+0x16/0x1b
  RIP  put_compound_page+0xd4/0x168

Signed-off-by: Youquan Song <youquan.song@intel.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoprintk: avoid double lock acquire
Peter Zijlstra [Thu, 8 Dec 2011 22:34:13 +0000 (14:34 -0800)]
printk: avoid double lock acquire

Commit 4f2a8d3cf5e ("printk: Fix console_sem vs logbuf_lock unlock race")
introduced another silly bug where we would want to acquire an already
held lock.  Avoid this.

Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agomemcg: update maintainers
KAMEZAWA Hiroyuki [Thu, 8 Dec 2011 22:34:10 +0000 (14:34 -0800)]
memcg: update maintainers

More players joined to memory cgroup developments and Johannes' great work
changed internal design of memory cgroup dramatically.  And he will do
more works.  Michal Hokko did many bug fixes and know memory cgroup very
well.  Daisuke Nishimura helped us very much but he seems busy now.
Thanks to his works.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agodrivers/rtc/rtc-s3c.c: fix driver clock enable/disable balance issues
Jonghwan Choi [Thu, 8 Dec 2011 22:34:02 +0000 (14:34 -0800)]
drivers/rtc/rtc-s3c.c: fix driver clock enable/disable balance issues

If an error occurs after the clock is enabled, the enable/disable state
can become unbalanced.

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoCREDITS: update Kees's expired fingerprint and fix details
Kees Cook [Thu, 8 Dec 2011 22:34:00 +0000 (14:34 -0800)]
CREDITS: update Kees's expired fingerprint and fix details

Small clean-up for my CREDITS entry; the GPG fingerprint was not up to
date, so I fixed other details at the same time too.

Signed-off-by: Kees Cook <kees@outflux.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agothp: reduce khugepaged freezing latency
Andrea Arcangeli [Thu, 8 Dec 2011 22:33:57 +0000 (14:33 -0800)]
thp: reduce khugepaged freezing latency

khugepaged can sometimes cause suspend to fail, requiring that the user
retry the suspend operation.

Use wait_event_freezable_timeout() instead of
schedule_timeout_interruptible() to avoid missing freezer wakeups.  A
try_to_freeze() would have been needed in the khugepaged_alloc_hugepage
tight loop too in case of the allocation failing repeatedly, and
wait_event_freezable_timeout will provide it too.

khugepaged would still freeze just fine by trying again the next minute
but it's better if it freezes immediately.

Reported-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agofs/proc/meminfo.c: fix compilation error
Claudio Scordino [Thu, 8 Dec 2011 22:33:56 +0000 (14:33 -0800)]
fs/proc/meminfo.c: fix compilation error

Fix the error message "directives may not be used inside a macro argument"
which appears when the kernel is compiled for the cris architecture.

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agovmscan: use atomic-long for shrinker batching
Konstantin Khlebnikov [Thu, 8 Dec 2011 22:33:54 +0000 (14:33 -0800)]
vmscan: use atomic-long for shrinker batching

Use atomic-long operations instead of looping around cmpxchg().

[akpm@linux-foundation.org: massage atomic.h inclusions]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agovmscan: fix initial shrinker size handling
Konstantin Khlebnikov [Thu, 8 Dec 2011 22:33:51 +0000 (14:33 -0800)]
vmscan: fix initial shrinker size handling

A shrinker function can return -1, means that it cannot do anything
without a risk of deadlock.  For example prune_super() does this if it
cannot grab a superblock refrence, even if nr_to_scan=0.  Currently we
interpret this -1 as a ULONG_MAX size shrinker and evaluate `total_scan'
according to this.  So the next time around this shrinker can cause
really big pressure.  Let's skip such shrinkers instead.

Also make total_scan signed, otherwise the check (total_scan < 0) below
never works.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoMAINTAINERS: Update amd-iommu F: patterns
Joe Perches [Fri, 9 Dec 2011 04:21:40 +0000 (20:21 -0800)]
MAINTAINERS: Update amd-iommu F: patterns

Commit 29b68415e335 ("x86: amd_iommu: move to drivers/iommu/")
moved the files, update the patterns.

CC: Ohad Ben-Cohen <ohad@wizery.com>
CC: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
10 years agox86, efi: Calling __pa() with an ioremap()ed address is invalid
Matt Fleming [Fri, 18 Nov 2011 13:09:11 +0000 (13:09 +0000)]
x86, efi: Calling __pa() with an ioremap()ed address is invalid

If we encounter an efi_memory_desc_t without EFI_MEMORY_WB set
in ->attribute we currently call set_memory_uc(), which in turn
calls __pa() on a potentially ioremap'd address.

On CONFIG_X86_32 this is invalid, resulting in the following
oops on some machines:

  BUG: unable to handle kernel paging request at f7f22280
  IP: [<c10257b9>] reserve_ram_pages_type+0x89/0x210
  [...]

  Call Trace:
   [<c104f8ca>] ? page_is_ram+0x1a/0x40
   [<c1025aff>] reserve_memtype+0xdf/0x2f0
   [<c1024dc9>] set_memory_uc+0x49/0xa0
   [<c19334d0>] efi_enter_virtual_mode+0x1c2/0x3aa
   [<c19216d4>] start_kernel+0x291/0x2f2
   [<c19211c7>] ? loglevel+0x1b/0x1b
   [<c19210bf>] i386_start_kernel+0xbf/0xc8

A better approach to this problem is to map the memory region
with the correct attributes from the start, instead of modifying
it after the fact. The uncached case can be handled by
ioremap_nocache() and the cached by ioremap_cache().

Despite first impressions, it's not possible to use
ioremap_cache() to map all cached memory regions on
CONFIG_X86_64 because EFI_RUNTIME_SERVICES_DATA regions really
don't like being mapped into the vmalloc space, as detailed in
the following bug report,

https://bugzilla.redhat.com/show_bug.cgi?id=748516

Therefore, we need to ensure that any EFI_RUNTIME_SERVICES_DATA
regions are covered by the direct kernel mapping table on
CONFIG_X86_64. To accomplish this we now map E820_RESERVED_EFI
regions via the direct kernel mapping with the initial call to
init_memory_mapping() in setup_arch(), whereas previously these
regions wouldn't be mapped if they were after the last E820_RAM
region until efi_ioremap() was called. Doing it this way allows
us to delete efi_ioremap() completely.

Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Huang Ying <huang.ying.caritas@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1321621751-3650-1-git-send-email-matt@console-pimps.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
10 years agocifs: check for NULL last_entry before calling cifs_save_resume_key
Jeff Layton [Fri, 2 Dec 2011 01:23:34 +0000 (20:23 -0500)]
cifs: check for NULL last_entry before calling cifs_save_resume_key

Prior to commit eaf35b1, cifs_save_resume_key had some NULL pointer
checks at the top. It turns out that at least one of those NULL
pointer checks is needed after all.

When the LastNameOffset in a FIND reply appears to be beyond the end of
the buffer, CIFSFindFirst and CIFSFindNext will set srch_inf.last_entry
to NULL. Since eaf35b1, the code will now oops in this situation.

Fix this by having the callers check for a NULL last entry pointer
before calling cifs_save_resume_key. No change is needed for the
call site in cifs_readdir as it's not reachable with a NULL
current_entry pointer.

This should fix:

    https://bugzilla.redhat.com/show_bug.cgi?id=750247

Cc: stable@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Reported-by: Adam G. Metzler <adamgmetzler@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
10 years agocifs: attempt to freeze while looping on a receive attempt
Jeff Layton [Fri, 2 Dec 2011 01:22:41 +0000 (20:22 -0500)]
cifs: attempt to freeze while looping on a receive attempt

In the recent overhaul of the demultiplex thread receive path, I
neglected to ensure that we attempt to freeze on each pass through the
receive loop.

Reported-and-Tested-by: Woody Suwalski <terraluna977@gmail.com>
Reported-and-Tested-by: Adam Williamson <awilliam@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
10 years agocifs: Fix sparse warning when calling cifs_strtoUCS
Steve French [Thu, 10 Nov 2011 18:48:20 +0000 (12:48 -0600)]
cifs: Fix sparse warning when calling cifs_strtoUCS

Fix sparse endian check warning while calling cifs_strtoUCS

CHECK   fs/cifs/smbencrypt.c
fs/cifs/smbencrypt.c:216:37: warning: incorrect type in argument 1
(different base types)
fs/cifs/smbencrypt.c:216:37:    expected restricted __le16 [usertype] *<noident>
fs/cifs/smbencrypt.c:216:37:    got unsigned short *<noident>

Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com
10 years agoCIFS: Add descriptions to the brlock cache functions
Pavel Shilovsky [Mon, 7 Nov 2011 13:11:24 +0000 (16:11 +0300)]
CIFS: Add descriptions to the brlock cache functions

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
10 years agomd: raid5 crash during degradation
Adam Kwolek [Fri, 9 Dec 2011 03:26:11 +0000 (14:26 +1100)]
md: raid5 crash during degradation

NULL pointer access causes crash in raid5 module.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
10 years agoARM: OMAP1: Always reprogram dpll1 rate at boot
Janusz Krzysztofik [Sun, 4 Dec 2011 15:07:47 +0000 (16:07 +0100)]
ARM: OMAP1: Always reprogram dpll1 rate at boot

DPLL1 reprogramming to a different rate is actually blocked inside
omap1_select_table_rate(). However, it is already forced at boot, for
boards which boot at unusable clock rates, and this seems to work
correctly.

OTOH, we now have a fine, run time performed clock selection algorithm
implemented, which prevents less powerfull SoCs from being overclocked
unintentionally.

Allow reprogramming of dpll1 by default, and use it for switching to the
higest supported clock rate with all boards, including those already
booting at a usable rate of 60 MHz or above.

Created against linux-omap/master tip as of Thu Dec 1,
commit f83c2a8cbb59981722d1ab610c79adfd034a2667. Requires the just
submitted patch "ARM: OMAP1: Move dpll1 rates selection from config to
runtime" to prevent from unintentional overclocking. Tested on Amstrad
Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
10 years agoARM: OMAP1: Update dpll1 default rate reprogramming method
Janusz Krzysztofik [Thu, 1 Dec 2011 21:16:26 +0000 (22:16 +0100)]
ARM: OMAP1: Update dpll1 default rate reprogramming method

According to comments in omap1_select_table_rate(), reprogramming dpll1
is tricky, and should always be done from SRAM.

While being at it, move OMAP730 special case handling inside
omap_sram_reprogram_clock().

Created on top of version 2 of the series "ARM: OMAP1: Fix dpll1
reprogramming related issues", which it depends on.
Tested on Amstrad Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
10 years agoARM: OMAP1: Move dpll1 rates selection from config to runtime
Janusz Krzysztofik [Fri, 9 Dec 2011 02:01:41 +0000 (18:01 -0800)]
ARM: OMAP1: Move dpll1 rates selection from config to runtime

For still better multi-OMAP1 support, expand omap1_rate_table with flags
for different SoC types and match them while selecting clock rates. The
idea is stolen from current omap24xx clock rate selection algorithm.

Since clkdev platform flag definitions are reused here, those had to be
expanded with one extra entry for OMAP1710 subtype, as this is the only
SoC for which we allow selection of the highest, 216 MHz rate.

Once done, remove no longer needed clock rate configure time options.

Tested on Amstrad Delta.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
[tony@atomide.com: updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>
10 years agoARM: OMAP1: Set the omap1623 sram size to 16K
Tony Lindgren [Thu, 8 Dec 2011 22:58:38 +0000 (14:58 -0800)]
ARM: OMAP1: Set the omap1623 sram size to 16K

Now that we're always reprogramming the core clock we must make
sure SRAM works. It seems that neither omap1621 or omap1623
has 256K of SRAM. Set the SRAM size to safe value of 16K.

Signed-off-by: Tony Lindgren <tony@atomide.com>
10 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 8 Dec 2011 21:21:28 +0000 (13:21 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  alarmtimers: Fix time comparison
  ptp: Fix clock_getres() implementation

10 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Thu, 8 Dec 2011 21:18:59 +0000 (13:18 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: drop spin lock when memory alloc fails
  Btrfs: check if the to-be-added device is writable
  Btrfs: try cluster but don't advance in search list
  Btrfs: try to allocate from cluster even at LOOP_NO_EMPTY_SIZE

10 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Linus Torvalds [Thu, 8 Dec 2011 21:18:38 +0000 (13:18 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/arm/arm-soc

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (28 commits)
  ARM: sa1100: fix build error
  ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram
  ARM: davinci: dm365 evm: align nand partition table to u-boot
  ARM: davinci: da850 evm: change audio edma event queue to EVENTQ_0
  ARM: davinci: dm646x evm: wrong register used in setup_vpif_input_channel_mode
  ARM: davinci: dm646x does not have a DSP domain
  ARM: davinci: psc: fix incorrect offsets
  ARM: davinci: psc: fix incorrect mask
  ARM: mx28: LRADC macro rename
  arm: mx23: recognise stmp378x as mx23
  ARM: mxs: fix machines' initializers order
  ARM: mxs/tx28: add __initconst for fec pdata
  ARM: S3C64XX: Staticise s3c6400_sysclass
  ARM: S3C64XX: Add linux/export.h to dev-spi.c
  ARM: S3C64XX: Remove extern from definition of framebuffer setup call
  MAINTAINERS: Extend Samsung patterns to cover SPI and ASoC drivers
  MAINTAINERS: Add linux-samsung-soc mailing list for Samsung
  MAINTAINERS: Consolidate Samsung MAINTAINERS
  ARM: CSR: PM: fix build error due to undeclared 'THIS_MODULE'
  ARM: CSR: fix build error due to new mdesc->dma_zone_size
  ...

10 years agoTOMOYO: Fix pathname handling of disconnected paths.
Tetsuo Handa [Thu, 8 Dec 2011 12:24:06 +0000 (21:24 +0900)]
TOMOYO: Fix pathname handling of disconnected paths.

Current tomoyo_realpath_from_path() implementation returns strange pathname
when calculating pathname of a file which belongs to lazy unmounted tree.
Use local pathname rather than strange absolute pathname in that case.

Also, this patch fixes a regression by commit 02125a82 "fix apparmor
dereferencing potentially freed dentry, sanitize __d_path() API".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agox86, hpet: Immediately disable HPET timer 1 if rtc irq is masked
Mark Langsdorf [Fri, 18 Nov 2011 15:33:06 +0000 (16:33 +0100)]
x86, hpet: Immediately disable HPET timer 1 if rtc irq is masked

When HPET is operating in RTC mode, the TN_ENABLE bit on timer1
controls whether the HPET or the RTC delivers interrupts to irq8. When
the system goes into suspend, the RTC driver sends a signal to the
HPET driver so that the HPET releases control of irq8, allowing the
RTC to wake the system from suspend. The switchover is accomplished by
a write to the HPET configuration registers which currently only
occurs while servicing the HPET interrupt.

On some systems, I have seen the system suspend before an HPET
interrupt occurs, preventing the write to the HPET configuration
register and leaving the HPET in control of the irq8. As the HPET is
not active during suspend, it does not generate a wake signal and RTC
alarms do not work.

This patch forces the HPET driver to immediately transfer control of
the irq8 channel to the RTC instead of waiting until the next
interrupt event.

Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Link: http://lkml.kernel.org/r/20111118153306.GB16319@alberich.amd.com
Tested-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
10 years agoMerge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas...
Russell King [Thu, 8 Dec 2011 18:02:04 +0000 (18:02 +0000)]
Merge branch 'for-rmk' of git://git./linux/kernel/git/cmarinas/linux into devel-stable

Conflicts:
arch/arm/mm/ioremap.c

10 years agoMerge branch 'fixes' of git://github.com/hzhuang1/linux into fixes
Arnd Bergmann [Thu, 8 Dec 2011 15:52:23 +0000 (15:52 +0000)]
Merge branch 'fixes' of git://github.com/hzhuang1/linux into fixes

10 years agoBtrfs: drop spin lock when memory alloc fails
Liu Bo [Thu, 8 Dec 2011 01:08:40 +0000 (20:08 -0500)]
Btrfs: drop spin lock when memory alloc fails

Drop spin lock in convert_extent_bit() when memory alloc fails,
otherwise, it will be a deadlock.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
10 years agoBtrfs: check if the to-be-added device is writable
Li Zefan [Thu, 8 Dec 2011 01:08:40 +0000 (20:08 -0500)]
Btrfs: check if the to-be-added device is writable

If we call ioctl(BTRFS_IOC_ADD_DEV) directly, we'll succeed in adding
a readonly device to a btrfs filesystem, and btrfs will write to
that device, emitting kernel errors:

[ 3109.833692] lost page write due to I/O error on loop2
[ 3109.833720] lost page write due to I/O error on loop2
...

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
10 years agoBtrfs: try cluster but don't advance in search list
Alexandre Oliva [Thu, 8 Dec 2011 01:08:40 +0000 (20:08 -0500)]
Btrfs: try cluster but don't advance in search list

When we find an existing cluster, we switch to its block group as the
current block group, possibly skipping multiple blocks in the process.
Furthermore, under heavy contention, multiple threads may fail to
allocate from a cluster and then release just-created clusters just to
proceed to create new ones in a different block group.

This patch tries to allocate from an existing cluster regardless of its
block group, and doesn't switch to that group, instead proceeding to
try to allocate a cluster from the group it was iterating before the
attempt.

Signed-off-by: Alexandre Oliva <oliva@lsd.ic.unicamp.br>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
10 years agoARM: LPAE: Add the Kconfig entries
Catalin Marinas [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: Add the Kconfig entries

This patch adds the ARM_LPAE and ARCH_PHYS_ADDR_T_64BIT Kconfig entries
allowing LPAE support to be compiled into the kernel.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: mark memory banks with start > ULONG_MAX as highmem
Will Deacon [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: mark memory banks with start > ULONG_MAX as highmem

Memory banks living outside of the 32-bit physical address
space do not have a 1:1 pa <-> va mapping and therefore the
__va macro may wrap.

This patch ensures that such banks are marked as highmem so
that the Kernel doesn't try to split them up when it sees that
the wrapped virtual address overlaps the vmalloc space.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
10 years agoARM: LPAE: Add identity mapping support for the 3-level page table format
Catalin Marinas [Tue, 22 Nov 2011 17:30:32 +0000 (17:30 +0000)]
ARM: LPAE: Add identity mapping support for the 3-level page table format

With LPAE, the pgd is a separate page table with entries pointing to the
pmd. The identity_mapping_add() function needs to ensure that the pgd is
populated before populating the pmd level. The do..while blocks now loop
over the pmd in order to have the same implementation for the two page
table formats. The pmd_addr_end() definition has been removed and the
generic one used instead. The pmd clean-up is done in the pgd_free()
function.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Add context switching support
Catalin Marinas [Tue, 22 Nov 2011 17:30:31 +0000 (17:30 +0000)]
ARM: LPAE: Add context switching support

With LPAE, TTBRx registers are 64-bit. The ASID is stored in TTBR0
rather than a separate Context ID register. This patch makes the
necessary changes to handle context switching on LPAE.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Add fault handling support
Catalin Marinas [Tue, 22 Nov 2011 17:30:31 +0000 (17:30 +0000)]
ARM: LPAE: Add fault handling support

The DFSR and IFSR register format is different when LPAE is enabled. In
addition, DFSR and IFSR have similar definitions for the fault type.
This modifies the fault code to correctly handle the new format.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Invalidate the TLB before freeing the PMD
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Invalidate the TLB before freeing the PMD

Similar to the PTE freeing, this patch introduced __pmd_free_tlb() which
invalidates the TLB before freeing a PMD page. This is needed because on
newer processors the entry in the upper page table may be cached by the
TLB and point to random data after the PMD has been freed.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: MMU setup for the 3-level page table format
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: MMU setup for the 3-level page table format

This patch adds the MMU initialisation for the LPAE page table format.
The swapper_pg_dir size with LPAE is 5 rather than 4 pages. A new
proc-v7-3level.S file contains the TTB initialisation, context switch
and PTE setting code with the LPAE. The TTBRx split is based on the
PAGE_OFFSET with TTBR1 used for the kernel mappings. The 36-bit mappings
(supersections) and a few other memory types in mmu.c are conditionally
compiled.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Page table maintenance for the 3-level format
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Page table maintenance for the 3-level format

This patch modifies the pgd/pmd/pte manipulation functions to support
the 3-level page table format. Since there is no need for an 'ext'
argument to cpu_set_pte_ext(), this patch conditionally defines a
different prototype for this function when CONFIG_ARM_LPAE.

The patch also introduces the L_PGD_SWAPPER flag to mark pgd entries
pointing to pmd tables pre-allocated in the swapper_pg_dir and avoid
trying to free them at run-time. This flag is 0 with the classic page
table format.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Introduce the 3-level page table format definitions
Catalin Marinas [Tue, 22 Nov 2011 17:30:29 +0000 (17:30 +0000)]
ARM: LPAE: Introduce the 3-level page table format definitions

This patch introduces the pgtable-3level*.h files with definitions
specific to the LPAE page table format (3 levels of page tables).

Each table is 4KB and has 512 64-bit entries. An entry can point to a
40-bit physical address. The young, write and exec software bits share
the corresponding hardware bits (negated). Other software bits use spare
bits in the PTE.

The patch also changes some variable types from unsigned long or int to
pteval_t or pgprot_t.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: add ISBs around MMU enabling code
Will Deacon [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: add ISBs around MMU enabling code

Before we enable the MMU, we must ensure that the TTBR registers contain
sane values. After the MMU has been enabled, we jump to the *virtual*
address of the following function, so we also need to ensure that the
SCTLR write has taken effect.

This patch adds ISB instructions around the SCTLR write to ensure the
visibility of the above.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Factor out classic-MMU specific code into proc-v7-2level.S
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Factor out classic-MMU specific code into proc-v7-2level.S

This patch modifies the proc-v7.S file so that it only contains code
shared between classic MMU and LPAE. The non-common code is factored out
into a separate file.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Move the FSR definitions to separate files
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Move the FSR definitions to separate files

The FSR structure is different with LPAE and this patch moves the
classic MMU specific definition to a separate fsr-2level.c file that is
included in fault.c. It also moves the fsr_fs and FSR bits to the
fault.h file.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: LPAE: Move page table maintenance macros to pgtable-2level.h
Catalin Marinas [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: LPAE: Move page table maintenance macros to pgtable-2level.h

The page table maintenance macros need to be duplicated between the
classic and the LPAE MMU so this patch moves those that are not common
to the pgtable-2level.h file.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: pgtable: switch to use pgtable-nopud.h
Russell King [Tue, 22 Nov 2011 17:30:28 +0000 (17:30 +0000)]
ARM: pgtable: switch to use pgtable-nopud.h

Nick Piggin noted upon introducing 4level-fixup.h:

| Add a temporary "fallback" header so architectures can run with
| the 4level pagetables patch without modification. All architectures
| should be converted to use the folding headers (include/asm-generic/
| pgtable-nop?d.h) as soon as possible, and the fallback header removed.

This makes ARM compliant with this statement.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: pgtable: Fix compiler warning in ioremap.c introduced by nopud
Catalin Marinas [Tue, 22 Nov 2011 17:30:27 +0000 (17:30 +0000)]
ARM: pgtable: Fix compiler warning in ioremap.c introduced by nopud

With the arch/arm code conversion to pgtable-nopud.h, the section and
supersection (un|re)map code triggers compiler warnings on UP systems.
This is caused by pmd_offset() being given a pgd_t argument rather than
a pud_t one. This patch makes the necessary conversion with the
assumption that the pud is folded into the pgd. The page table setting
code only loops over the pmd which is enough with the classic page
tables. This code is not compiled when LPAE is enabled.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
10 years agoARM: sa1100: fix build error
Jett.Zhou [Wed, 30 Nov 2011 06:32:54 +0000 (14:32 +0800)]
ARM: sa1100: fix build error

arm-eabi-4.4.3-ld:--defsym zreladdr=: syntax error
make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 1
make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2
make: *** [uImage] Error 2

Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Jett.Zhou <jtzhou@marvell.com>
10 years agomd/raid5: never wait for bad-block acks on failed device.
NeilBrown [Thu, 8 Dec 2011 05:27:57 +0000 (16:27 +1100)]
md/raid5: never wait for bad-block acks on failed device.

Once a device is failed we really want to completely ignore it.
It should go away soon anyway.

In particular the presence of bad blocks on it should not cause us to
block as we won't be trying to write there anyway.

So as soon as we can check if a device is Faulty, do so and pretend
that it is already gone if it is Faulty.

Signed-off-by: NeilBrown <neilb@suse.de>
10 years agomd: ensure new badblocks are handled promptly.
NeilBrown [Thu, 8 Dec 2011 05:26:08 +0000 (16:26 +1100)]
md: ensure new badblocks are handled promptly.

When we mark blocks as bad we need them to be acknowledged by the
metadata handler promptly.

For an in-kernel metadata handler that was already being done.  But
for an external metadata handler we need to alert it of the change by
sending a notification through the sysfs file.  This adds that
notification.

Signed-off-by: NeilBrown <neilb@suse.de>