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2012-03-16mfd: Add 8520 PRCMU variant to db8500-prcmuBengt Jonsson1-0/+1
Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com> Reviewed-by: Mattias Nilssson <mattias.i.nilsson@stericsson.com> Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16mfd: Remove obsolete hwacc implementation for db8500-prmcuMattias Nilsson1-43/+0
This patch removes the obsolete hwacc implementation in the DB8500 PRCMU driver. Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com> Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16Merge branch 'ux500/dt' into next/dt2Arnd Bergmann10-22/+248
* ux500/dt: ARM: ux500: Provide local timer support for Device Tree ARM: ux500: Enable PL022 SSP Controller in Device Tree ARM: ux500: Enable PL310 Level 2 Cache Controller in Device Tree ARM: ux500: Enable PL011 AMBA UART Controller for Device Tree ARM: ux500: Enable Cortex-A9 GIC (Generic Interrupt Controller) in Device Tree ARM: ux500: db8500: list most devices in the snowball device tree ARM: ux500: split dts file for snowball into generic part ARM: ux500: combine the board init functions for DT boot ARM: ux500: Initial Device Tree support for Snowball ARM: ux500: CONFIG: Enable Device Tree support for future endeavours ARM: ux500: fix compilation after local timer rework (adds dependency on localtimer branch, irqdomain branch and ux500/soc branch) Conflicts: arch/arm/mach-ux500/devices-common.c This adds patches from Lee Jones, Niklas Hernaeus and myself to provide initial device tree support on the ux500 platform. The pull request from Lee contained some other changes, so I rebased the patches on top of the branches that are actually dependencies for this. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-03-16Merge branch 'depends/driver-core' into ux500/dtArnd Bergmann10-22/+248
Conflicts: drivers/base/cpu.c
2012-03-16mfd: Add support for RICOH PMIC RC5T583Laxman Dewangan1-0/+295
Ricoh power management IC RC5T583 contains is multi functional device having multiple sub devices inside this. This device has multiple dcdc/ldo regulators, gpios, interrupt controllers, on-key, RTCs, ADCs. This device have 4 DCDCs, 8 LDOs, 8 GPIOs, 6 ADCs, 3 RTCs etc. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16mfd: Make use of the ab8500 firmware read-modify-write serviceMattias Nilsson1-2/+4
This patch updates the AB8500 driver to make use of the I2C read-modify-write service in the PRCMU firmware. Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com> Reviewed-by: Mattias Wallin <mattias.wallin@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16mfd: Add a prcmu_abb_write_masked routine to db8500-prcmuMattias Nilsson1-0/+7
This patch adds driver support for the I2C read-modify-write service in the U8500 PRCMU firmware. Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16mfd: Support for the AB8500 AB8505 variantBengt Jonsson1-42/+57
This builds upon the changes done to support AB9540 so as also to support the AB8505 derivative of the AB8500 circuit. Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16mfd: Remove unused LDO supply field from WM8994 pdataMark Brown1-1/+0
It's causing confusion with the regulator level field of the same name and serves no useful function. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16Merge branch 'master' of ↵John W. Linville1-0/+10
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem Conflicts: drivers/net/wireless/ath/ath9k/hw.c
2012-03-16mfd: Add platform data for MAX8997 haptic driverChanwoo Choi1-1/+52
MAX8997 device does not support haptic function of it. This patch adds platform data for for MAX8997 haptic driver. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-03-16perf: Adding sysfs group format attribute for pmu deviceJiri Olsa1-0/+14
Adding sysfs group 'format' attribute for pmu device that contains a syntax description on how to construct raw events. The event configuration is described in following struct pefr_event_attr attributes: config config1 config2 Each sysfs attribute within the format attribute group, describes mapping of name and bitfield definition within one of above attributes. eg: "/sys/...<dev>/format/event" contains "config:0-7" "/sys/...<dev>/format/umask" contains "config:8-15" "/sys/...<dev>/format/usr" contains "config:16" the attribute value syntax is: line: config ':' bits config: 'config' | 'config1' | 'config2" bits: bits ',' bit_term | bit_term bit_term: VALUE '-' VALUE | VALUE Adding format attribute definitions for x86 cpu pmus. Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-vhdk5y2hyype9j63prymty36@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-03-16device.h: audit and cleanup users in main include dirPaul Gortmaker43-40/+56
The <linux/device.h> header includes a lot of stuff, and it in turn gets a lot of use just for the basic "struct device" which appears so often. Clean up the users as follows: 1) For those headers only needing "struct device" as a pointer in fcn args, replace the include with exactly that. 2) For headers not really using anything from device.h, simply delete the include altogether. 3) For headers relying on getting device.h implicitly before being included themselves, now explicitly include device.h 4) For files in which doing #1 or #2 uncovers an implicit dependency on some other header, fix by explicitly adding the required header(s). Any C files that were implicitly relying on device.h to be present have already been dealt with in advance. Total removals from #1 and #2: 51. Total additions coming from #3: 9. Total other implicit dependencies from #4: 7. As of 3.3-rc1, there were 110, so a net removal of 42 gives about a 38% reduction in device.h presence in include/* Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-03-16Merge branch 'at91-3.4-cleanup2-DT2' of ↵Arnd Bergmann3-0/+62
git://github.com/at91linux/linux-at91 into next/dt * 'at91-3.4-cleanup2-DT2' of git://github.com/at91linux/linux-at91: (23 commits) ARM: at91: dt: enable usb ehci for sam9g45 and sam9x5 ARM: at91: usb ehci add dt support ARM: at91: dt: enable usb ohci for sam9g20, sam9g45 amd sam9x5 ARM: at91: usb ohci add dt support ARM: at91: add Shutdown Controller (SHDWC) DT support ARM: at91: add ram controller DT support ARM: at91: add RSTC (Reset Controller) dt support ARM: at91: always enable sam9 restart ARM: at91: add pmc DT support ARM: at91/dt: add specific DT soc init ARM: at91/dt: add Calao DAB-MMX daugther board support for USB-A9G20 ARM: at91: sam9x5 add i2c DT support ARM: at91: sam9g45 add i2c DT support ARM: at91: usb_a9g20 add DT i2c support ARM: at91: sam9g20 add i2c DT support i2c/gpio: add DT support ARM: at91: sam9x5 add nand support atmel/nand: add DT support of/mtd/nand: add generic bindings and helpers of: introduce helper to manage boolean ...
2012-03-16ARM: orion: spi: remove enable_clock_fix which is not usedAndrew Lunn1-1/+0
Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jason Cooper <jason@lakedaemon.net> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2012-03-16rtc: Provide flag for rtc devices that don't support UIEJohn Stultz1-1/+2
Richard Weinberger noticed that on some RTC hardware that doesn't support UIE mode, due to coarse granular alarms (like 1minute resolution), the current virtualized RTC support doesn't properly error out when UIE is enabled. Instead the current code queues an alarm for the next second, but it won't fire until up to a miniute later. This patch provides a generic way to flag this sort of hardware and fixes the issue on the mpc5121 where Richard noticed the problem. CC: stable@vger.kernel.org Reported-by: Richard Weinberger <richard@nod.at> Tested-by: Richard Weinberger <richard@nod.at> Signed-off-by: John Stultz <john.stultz@linaro.org>
2012-03-16math: Introduce div64_longSasha Levin1-0/+4
Add a div64_long macro which is used to devide a 64bit number by a long (which can be 4 bytes on 32bit systems and 8 bytes on 64bit systems). Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Cc: johnstul@us.ibm.com Link: http://lkml.kernel.org/r/1331829374-31543-1-git-send-email-levinsasha928@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-03-15USB: EHCI: Add a generic platform device driverHauke Mehrtens1-0/+46
This adds a generic driver for platform devices. It works like the PCI driver and is based on it. This is for devices which do not have an own bus but their EHCI controller works like a PCI controller. It will be used for the Broadcom bcma and ssb USB EHCI controller. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-15USB: OHCI: Add a generic platform device driverHauke Mehrtens1-0/+38
This adds a generic driver for platform devices. It works like the PCI driver and is based on it. This is for devices which do not have an own bus but their OHCI controller works like a PCI controller. It will be used for the Broadcom bcma and ssb USB OHCI controller. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-15[PATCH v3] ipc: provide generic compat versions of IPC syscallsChris Metcalf1-1/+11
When using the "compat" APIs, architectures will generally want to be able to make direct syscalls to msgsnd(), shmctl(), etc., and in the kernel we would want them to be handled directly by compat_sys_xxx() functions, as is true for other compat syscalls. However, for historical reasons, several of the existing compat IPC syscalls do not do this. semctl() expects a pointer to the fourth argument, instead of the fourth argument itself. msgsnd(), msgrcv() and shmat() expect arguments in different order. This change adds an ARCH_WANT_OLD_COMPAT_IPC config option that can be set to preserve this behavior for ports that use it (x86, sparc, powerpc, s390, and mips). No actual semantics are changed for those architectures, and there is only a minimal amount of code refactoring in ipc/compat.c. Newer architectures like tile (and perhaps future architectures such as arm64 and unicore64) should not select this option, and thus can avoid having any IPC-specific code at all in their architecture-specific compat layer. In the same vein, if this option is not selected, IPC_64 mode is assumed, since that's what the <asm-generic> headers expect. The workaround code in "tile" for msgsnd() and msgrcv() is removed with this change; it also fixes the bug that shmat() and semctl() were not being properly handled. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2012-03-15Merge branch 'board-specific' of git://github.com/hzhuang1/linux into ↵Arnd Bergmann8-44/+35
next/boards * 'board-specific' of git://github.com/hzhuang1/linux: pxa/hx4700: Remove pcmcia platform_device structure ARM: pxa/hx4700: Reduce sleep mode battery discharge by 35% ARM: pxa/hx4700: Remove unwanted request for GPIO105 (update to 3.3-rc7) Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2012-03-15of/mtd/nand: add generic bindings and helpersJean-Christophe PLAGNIOL-VILLARD1-0/+19
- nand-ecc-mode : String, operation mode of the NAND ecc mode. Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first", "soft_bch". - nand-bus-width : 8 or 16 bus width if not present 8 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Stefan Roese <sr@denx.de>
2012-03-15of: introduce helper to manage booleanJean-Christophe PLAGNIOL-VILLARD1-0/+16
of_property_read_bool Search for a property in a device node. Returns true if the property exist false otherwise. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Grant Likely <grant.likely@secretlab.ca>
2012-03-15mtd/atmel_nand: add on_flash_bbt to enable the use of On Flash BBTJean-Christophe PLAGNIOL-VILLARD1-0/+1
This will allow to enable it from the board. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: David Woodhouse <dwmw2@infradead.org>
2012-03-15ATMEL: fix nand ecc supportJean-Christophe PLAGNIOL-VILLARD1-0/+26
So we can now choose for the board the ecc mode (ecc soft, soft bch, no ecc and hardware). Set ecc mode in the boards to soft as currently in the driver. Move platform data to a common header include/linux/platform_data/atmel_nand.h Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: David Woodhouse <dwmw2@infradead.org>
2012-03-15Merge branch 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6 ↵Arnd Bergmann8-44/+35
into next/cleanup * 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6: ep93xx: Remove unnecessary includes of ep93xx-regs.h ep93xx: Move EP93XX_SYSCON defines to SoC private header ep93xx: Move crunch code to mach-ep93xx directory ep93xx: Make syscon access functions private to SoC ep93xx: Configure GPIO ports in core code ep93xx: Move peripheral defines to local SoC header ep93xx: Convert the watchdog driver into a platform device. ep93xx: Use ioremap for backlight driver ep93xx: Move GPIO defines to gpio-ep93xx.h ep93xx: Don't use system controller defines in audio drivers ep93xx: Move PHYS_BASE defines to local SoC header file (update to v3.3-rc7) Conflicts: arch/arm/mach-s3c2440/common.h
2012-03-15udlfb: remove sysfs framebuffer device with USB .disconnect()Kay Sievers1-0/+1
The USB graphics card driver delays the unregistering of the framebuffer device to a workqueue, which breaks the userspace visible remove uevent sequence. Recent userspace tools started to support USB graphics card hotplug out-of-the-box and rely on proper events sent by the kernel. The framebuffer device is a direct child of the USB interface which is removed immediately after the USB .disconnect() callback. But the fb device in /sys stays around until its final cleanup, at a time where all the parent devices have been removed already. To work around that, we remove the sysfs fb device directly in the USB .disconnect() callback and leave only the cleanup of the internal fb data to the delayed work. Before: add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb) add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb) add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb0 (graphics) remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb) remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb) remove /2-1.2:1.0/graphics/fb0 (graphics) After: add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb) add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb) add /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb1 (graphics) remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/graphics/fb1 (graphics) remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0 (usb) remove /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 (usb) Cc: stable@vger.kernel.org Tested-by: Bernie Thompson <bernie@plugable.com> Acked-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
2012-03-15drm: Merge tag 'v3.3-rc7' into drm-core-nextDave Airlie37-95/+157
Merge the fixes so far into core-next, needed to test intel driver. Conflicts: drivers/gpu/drm/i915/intel_ringbuffer.c
2012-03-15spi: sh-hspi: control spi clock more correctlyKuninori Morimoto1-11/+0
Current sh-hspi had used platform-specific speed. This patch remove it, and use spi_transfer specific speed. It removes unnecessary flags from struct sh_hspi_info, but struct sh_hspi_info is still exist, since sh-hspi needs platform info in the future. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-03-15Merge branch 'for-linus' of git://git.kernel.dk/linux-blockLinus Torvalds3-3/+12
Pull block fixes from Jens Axboe: "Been sitting on this for a while, but lets get this out the door. This fixes various important bugs for 3.3 final, along with a few more trivial ones. Please pull!" * 'for-linus' of git://git.kernel.dk/linux-block: block: fix ioc leak in put_io_context block, sx8: fix pointer math issue getting fw version Block: use a freezable workqueue for disk-event polling drivers/block/DAC960: fix -Wuninitialized warning drivers/block/DAC960: fix DAC960_V2_IOCTL_Opcode_T -Wenum-compare warning block: fix __blkdev_get and add_disk race condition block: Fix setting bio flags in drivers (sd_dif/floppy) block: Fix NULL pointer dereference in sd_revalidate_disk block: exit_io_context() should call elevator_exit_icq_fn() block: simplify ioc_release_fn() block: replace icq->changed with icq->flags
2012-03-14provide disable_cpufreq() function to disable the API.Konrad Rzeszutek Wilk1-0/+2
useful for disabling cpufreq altogether. The cpu frequency scaling drivers and cpu frequency governors will fail to register. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dave Jones <davej@redhat.com>
2012-03-14Merge remote-tracking branch 'regmap/topic/bulk' into regmap-nextMark Brown1-0/+2
2012-03-14Merge remote-tracking branch 'regmap/topic/introspection' into regmap-nextMark Brown1-0/+1
Simple add/add conflict: drivers/base/regmap/regmap.c
2012-03-14Merge remote-tracking branches 'regmap/topic/patch' and 'regmap/topic/sync' ↵Mark Brown1-0/+2
into regmap-next
2012-03-14Merge remote-tracking branch 'regmap/topic/drivers' into regmap-nextMark Brown43-380/+180
Resolved simple add/add conflicts: drivers/base/regmap/internal.h drivers/base/regmap/regmap.c
2012-03-14Merge remote-tracking branches 'regmap/topic/core' and 'regmap/topic/devm' ↵Mark Brown1-0/+8
into regmap-next
2012-03-14perf: Add ifdef to remove unused enum switch warningsJiri Olsa1-0/+2
Fix for unused symbols in switch warnings. Link: http://lkml.kernel.org/r/20120313230302.GA1514@m.redhat.com Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2012-03-14padata: Fix race on sequence number wrapSteffen Klassert1-4/+2
When padata_do_parallel() is called from multiple cpus for the same padata instance, we can get object reordering on sequence number wrap because testing for sequence number wrap and reseting the sequence number must happen atomically but is implemented with two atomic operations. This patch fixes this by converting the sequence number from atomic_t to an unsigned int and protect the access with a spin_lock. As a side effect, we get rid of the sequence number wrap handling because the seqence number wraps back to null now without the need to do anything. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2012-03-14Merge tag 'v3.3-rc7' into x86/platformIngo Molnar46-423/+175
Merge reason: Update to the almost-final v3.3 kernel. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-14Merge tag 'v3.3-rc7' into x86/mceIngo Molnar46-423/+175
Merge reason: Update from an ancient -rc1 base to an almost-final stable kernel. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-03-14Input: of_keymap - add device tree bindings for simple key matricesOlof Johansson1-0/+19
This adds a simple device tree binding for simple key matrix data and a helper to fill in the platform data. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2012-03-14fs: add new FMODE flags: FMODE_32bithash and FMODE_64bithashBernd Schubert1-0/+4
Those flags are supposed to be set by NFS readdir() to tell ext3/ext4 to 32bit (NFSv2) or 64bit hash values (offsets) in seekdir(). Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-14jbd2: cleanup journal tail after transaction commitJan Kara1-0/+1
Normally, we have to issue a cache flush before we can update journal tail in journal superblock, effectively wiping out old transactions from the journal. So use the fact that during transaction commit we issue cache flush anyway and opportunistically push journal tail as far as we can. Since update of journal superblock is still costly (we have to use WRITE_FUA), we update log tail only if we can free significant amount of space. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-14jbd2: remove bh_state lock from checkpointing codeJan Kara1-0/+2
All accesses to checkpointing entries in journal_head are protected by j_list_lock. Thus __jbd2_journal_remove_checkpoint() doesn't really need bh_state lock. Also the only part of journal head that the rest of checkpointing code needs to check is jh->b_transaction which is safe to read under j_list_lock. So we can safely remove bh_state lock from all of checkpointing code which makes it considerably prettier. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-14jbd2: issue cache flush after checkpointing even with internal journalJan Kara1-1/+5
When we reach jbd2_cleanup_journal_tail(), there is no guarantee that checkpointed buffers are on a stable storage - especially if buffers were written out by jbd2_log_do_checkpoint(), they are likely to be only in disk's caches. Thus when we update journal superblock effectively removing old transaction from journal, this write of superblock can get to stable storage before those checkpointed buffers which can result in filesystem corruption after a crash. Thus we must unconditionally issue a cache flush before we update journal superblock in these cases. A similar problem can also occur if journal superblock is written only in disk's caches, other transaction starts reusing space of the transaction cleaned from the log and power failure happens. Subsequent journal replay would still try to replay the old transaction but some of it's blocks may be already overwritten by the new transaction. For this reason we must use WRITE_FUA when updating log tail and we must first write new log tail to disk and update in-memory information only after that. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-14Merge branch 'next/cleanup-exynos-clock' of ↵Olof Johansson7-18/+35
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/cleanup * 'next/cleanup-exynos-clock' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver ARM: EXYNOS: add clock registers for exynos4x12-cpufreq PM / devfreq: update the name of EXYNOS clock registers that were omitted PM / devfreq: update the name of EXYNOS clock register ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock ARM: EXYNOS: use static declaration on regarding clock ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs (includes an update to v3.3-rc6)
2012-03-14PM / QoS: Make it possible to expose PM QoS latency constraintsRafael J. Wysocki2-0/+10
A runtime suspend of a device (e.g. an MMC controller) belonging to a power domain or, in a more complicated scenario, a runtime suspend of another device in the same power domain, may cause power to be removed from the entire domain. In that case, the amount of time necessary to runtime-resume the given device (e.g. the MMC controller) is often substantially greater than the time needed to run its driver's runtime resume callback. That may hurt performance in some situations, because user data may need to wait for the device to become operational, so we should make it possible to prevent that from happening. For this reason, introduce a new sysfs attribute for devices, power/pm_qos_resume_latency_us, allowing user space to specify the upper bound of the time necessary to bring the (runtime-suspended) device up after the resume of it has been requested. However, make that attribute appear only for the devices whose drivers declare support for it by calling the (new) dev_pm_qos_expose_latency_limit() helper function with the appropriate initial value of the attribute. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reviewed-by: Kevin Hilman <khilman@ti.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2012-03-14Drivers: hv: Add new message types to enhance KVPK. Y. Srinivasan1-3/+27
Add additional KVP (Key Value Pair) protocol messages to enhance KVP functionality for Linux guests on Hyper-V. As part of this, patch define an explicit version negoitiation message. Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-14USB: dynamically allocate usb_device children pointers instead of using a ↵Huajun Li1-1/+1
fix array Non-hub device has no child, and even a real USB hub has ports far less than USB_MAXCHILDREN, so there is no need using a fix array for child devices, just allocate it dynamically according real port number. Signed-off-by: Huajun Li <huajun.li.lee@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-03-13jbd2: split updating of journal superblock and marking journal emptyJan Kara1-1/+1
There are three case of updating journal superblock. In the first case, we want to mark journal as empty (setting s_sequence to 0), in the second case we want to update log tail, in the third case we want to update s_errno. Split these cases into separate functions. It makes the code slightly more straightforward and later patches will make the distinction even more important. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>