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2011-05-31block: remove unwanted semicolonsNamhyung Kim
Since those defined functions require additional semicolon from the caller, they could cause potential syntax errors when used in if-else statements. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-05-30Revert "block: Remove extra discard_alignment from hd_struct."Jens Axboe
It was not a good idea to start dereferencing disk->queue from the fs sysfs strategy for displaying discard alignment. We ran into first a NULL pointer deref, and after fixing that we sometimes see unvalid disk->queue pointer values. Since discard is the only one of the bunch actually looking into the queue, just revert the change. This reverts commit 23ceb5b7719e9276d4fa72a3ecf94dd396755276. Conflicts: fs/partitions/check.c
2011-05-27Merge git://git.infradead.org/mtd-2.6Linus Torvalds
* git://git.infradead.org/mtd-2.6: (97 commits) mtd: kill CONFIG_MTD_PARTITIONS mtd: remove add_mtd_partitions, add_mtd_device and friends mtd: convert remaining users to mtd_device_register() mtd: samsung onenand: convert to mtd_device_register() mtd: omap2 onenand: convert to mtd_device_register() mtd: txx9ndfmc: convert to mtd_device_register() mtd: tmio_nand: convert to mtd_device_register() mtd: socrates_nand: convert to mtd_device_register() mtd: sharpsl: convert to mtd_device_register() mtd: s3c2410 nand: convert to mtd_device_register() mtd: ppchameleonevb: convert to mtd_device_register() mtd: orion_nand: convert to mtd_device_register() mtd: omap2: convert to mtd_device_register() mtd: nomadik_nand: convert to mtd_device_register() mtd: ndfc: convert to mtd_device_register() mtd: mxc_nand: convert to mtd_device_register() mtd: mpc5121_nfc: convert to mtd_device_register() mtd: jz4740_nand: convert to mtd_device_register() mtd: h1910: convert to mtd_device_register() mtd: fsmc_nand: convert to mtd_device_register() ... Fixed up trivial conflicts in - drivers/mtd/maps/integrator-flash.c: removed in ARM tree - drivers/mtd/maps/physmap.c: addition of afs partition probe type clashing with removal of CONFIG_MTD_PARTITIONS
2011-05-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (60 commits) [SCSI] lpfc 8.3.24: Extend BSG infrastructure and add link diagnostics [SCSI] lpfc 8.3.24: Add resource extent support [SCSI] lpfc 8.3.24: Add request-firmware support [SCSI] lpfc 8.3.24: Add SR-IOV control [SCSI] lpfc 8.3.24: Extended hardware support and support dump images [SCSI] lpfc 8.3.24: Miscellaneous Fixes and Corrections [SCSI] libsas: Add option for SATA soft reset [SCSI] libsas: check dev->gone before submitting sata i/o [SCSI] libsas: fix/amend device gone notification in sas_deform_port() [SCSI] MAINTAINERS update for SCSI (new email address) [SCSI] Fix Ultrastor asm snippet [SCSI] osst: fix warning [SCSI] osst: wrong index used in inner loop [SCSI] aic94xx: world-writable sysfs update_bios file [SCSI] MAINTAINERS: Add drivers/target/ entry [SCSI] target: Convert TASK_ATTR to scsi_tcq.h definitions [SCSI] target: Convert REPORT_LUNs to use int_to_scsilun [SCSI] target: Fix task->task_execute_queue=1 clear bug + LUN_RESET OOPs [SCSI] target: Fix bug with task_sg chained transport_free_dev_tasks release [SCSI] target: Fix interrupt context bug with stats_lock and core_tmr_alloc_req ...
2011-05-27Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (45 commits) ARM: 6945/1: Add unwinding support for division functions ARM: kill pmd_off() ARM: 6944/1: mm: allow ASID 0 to be allocated to tasks ARM: 6943/1: mm: use TTBR1 instead of reserved context ID ARM: 6942/1: mm: make TTBR1 always point to swapper_pg_dir on ARMv6/7 ARM: 6941/1: cache: ensure MVA is cacheline aligned in flush_kern_dcache_area ARM: add sendmmsg syscall ARM: 6863/1: allow hotplug on msm ARM: 6832/1: mmci: support for ST-Ericsson db8500v2 ARM: 6830/1: mach-ux500: force PrimeCell revisions ARM: 6829/1: amba: make hardcoded periphid override hardware ARM: 6828/1: mach-ux500: delete SSP PrimeCell ID ARM: 6827/1: mach-netx: delete hardcoded periphid ARM: 6940/1: fiq: Briefly document driver responsibilities for suspend/resume ARM: 6938/1: fiq: Refactor {get,set}_fiq_regs() for Thumb-2 ARM: 6914/1: sparsemem: fix highmem detection when using SPARSEMEM ARM: 6913/1: sparsemem: allow pfn_valid to be overridden when using SPARSEMEM at91: drop at572d940hf support at91rm9200: introduce at91rm9200_set_type to specficy cpu package at91: drop boot_params and PLAT_PHYS_OFFSET ...
2011-05-27Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: net: Kill ratelimit.h dependency in linux/net.h net: Add linux/sysctl.h includes where needed. net: Kill ether_table[] declaration. inetpeer: fix race in unused_list manipulations atm: expose ATM device index in sysfs IPVS: bug in ip_vs_ftp, same list heaad used in all netns. bug.h: Move ratelimit warn interfaces to ratelimit.h bonding: cleanup module option descriptions net:8021q:vlan.c Fix pr_info to just give the vlan fullname and version. net: davinci_emac: fix dev_err use at probe can: convert to %pK for kptr_restrict support net: fix ETHTOOL_SFEATURES compatibility with old ethtool_ops.set_flags netfilter: Fix several warnings in compat_mtw_from_user(). netfilter: ipset: fix ip_set_flush return code netfilter: ipset: remove unused variable from type_pf_tdel() netfilter: ipset: Use proper timeout value to jiffies conversion
2011-05-27net: Kill ratelimit.h dependency in linux/net.hDavid S. Miller
Ingo Molnar noticed that we have this unnecessary ratelimit.h dependency in linux/net.h, which hid compilation problems from people doing builds only with CONFIG_NET enabled. Move this stuff out to a seperate net/net_ratelimit.h file and include that in the only two places where this thing is needed. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Ingo Molnar <mingo@elte.hu>
2011-05-27net: Add linux/sysctl.h includes where needed.David S. Miller
Several networking headers were depending upon the implicit linux/sysctl.h include they get when including linux/net.h Add explicit includes. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-27net: Kill ether_table[] declaration.David S. Miller
This got missed back in 2006 when Jes Sorensen deleted net/ethernet/sysctl_net_ether.c Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-27Merge branch 'docs-move' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs * 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs: Create Documentation/security/, move LSM-, credentials-, and keys-related files from Documentation/ to Documentation/security/, add Documentation/security/00-INDEX, and update all occurrences of Documentation/<moved_file> to Documentation/security/<moved_file>.
2011-05-27Merge branch 'v4l_for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: [media] v1.88 DM04/QQBOX Move remote to use rc_core dvb-usb-remote [media] Add missing include guard to header file [media] Inlined functions should be static [media] Remove invalid parameter description [media] cpia2: fix warning about invalid trigraph sequence [media] s5p-csis: Add missing dependency on PLAT_S5P [media] gspca/kinect: wrap gspca_debug with GSPCA_DEBUG [media] fintek-cir: new driver for Fintek LPC SuperIO CIR function [media] uvcvideo: Connect video devices to media entities [media] uvcvideo: Register subdevices for each entity [media] uvcvideo: Register a v4l2_device [media] add V4L2-PIX-FMT-SRGGB12 & friends to docbook [media] Documentation/DocBook: Rename media fops xml files [media] Media DocBook: fix validation errors [media] wl12xx: g_volatile_ctrl fix: wrong field set [media] fix kconfig dependency warning for VIDEO_TIMBERDALE [media] dm1105: GPIO handling added, I2C on GPIO added, LNB control through GPIO reworked [media] Add support for M-5MOLS 8 Mega Pixel camera ISP
2011-05-27Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: (42 commits) regulator: Fix _regulator_get_voltage if get_voltage callback is NULL USB: TWL6025 allow different regulator name REGULATOR: TWL6025: add support to twl-regulator regulator: twl6030: do not write to _GRP for regulator disable regulator: twl6030: do not write to _GRP for regulator enable TPS65911: Comparator: Add comparator driver TPS65911: Add support for added GPIO lines GPIO: TPS65910: Move driver to drivers/gpio/ TPS65911: Add new irq definitions regulator: tps65911: Add new chip version MFD: TPS65910: Add support for TPS65911 device regulator: Fix off-by-one value range checking for mc13xxx_regulator_get_voltage regulator: mc13892: Fix voltage unit in test case. regulator: Remove MAX8997_REG_BUCK1DVS/MAX8997_REG_BUCK2DVS/MAX8997_REG_BUCK5DVS macros mfd: Fix off-by-one value range checking for tps65910_i2c_write regulator: Only apply voltage constraints from consumers that set them regulator: If we can't configure optimum mode we're always in the best one regulator: max8997: remove useless code regulator: Fix memory leak in max8998_pmic_probe failure path regulator: Fix desc_id for tps65023/6507x/65910 ...
2011-05-27Merge git://git.infradead.org/battery-2.6Linus Torvalds
* git://git.infradead.org/battery-2.6: PXA: Use dev_pm_ops in z2_battery ds2760_battery: Fix rated capacity of the hx4700 1800mAh battery ds2760_battery: Fix indexing of the 4 active full EEPROM registers power: Make test_power driver more dynamic. bq27x00_battery: Name of cycle count property max8903_charger: Add GENERIC_HARDIRQS as a dependency (fixes S390 build) ARM: RX-51: Enable isp1704 power on/off isp1704_charger: Allow board specific powering routine gpio-charger: Add gpio_charger_resume power_supply: Add driver for MAX8903 charger
2011-05-27Merge branch 'pablo/nf-2.6-updates' of git://1984.lsi.us.es/net-2.6David S. Miller
2011-05-27IPVS: bug in ip_vs_ftp, same list heaad used in all netns.Hans Schillstrom
When ip_vs was adapted to netns the ftp application was not adapted in a correct way. However this is a fix to avoid kernel errors. In the long term another solution might be chosen. I.e the ports that the ftp appl, uses should be per netns. Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-05-27TPS65911: Comparator: Add comparator driverJorge Eduardo Candelaria
This driver adds functionality to the tps65911 chip driver. Two of the comparators are configurable by software and measures VCCS voltage to detect high or low voltage scenarios. Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27TPS65911: Add support for added GPIO linesJorge Eduardo Candelaria
GPIO 1 to 8 are added for TPS65911 chip version. The gpio driver now handles more than one gpio lines. Subsequent versions of the chip family can add new GPIO lines with minimal driver changes. Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27TPS65911: Add new irq definitionsJorge Eduardo Candelaria
TPS65911 adds new interrupt sources, as well as two new registers to handle them, one for interrupt status and one for interrupt masking. The added irqs are: -VMBCH2 - Low and High threshold -GPIO1-8 - Rising and falling edge detection -WTCHDG - Watchdog interrupt -PWRDN - PWRDN reset interrupt The code should handle these new registers only when the chip version is TPS65911. Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27regulator: tps65911: Add new chip versionJorge Eduardo Candelaria
The tps65911 chip introduces new features, including changes in the regulator module. - VDD1 and VDD2 remain unchanged. - VDD3 is now named VDDCTRL and has a wider voltage range. - LDOs are now named LDO1...8 and voltage ranges are sequential, making LDOs easier to handle. Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27MFD: TPS65910: Add support for TPS65911 deviceJorge Eduardo Candelaria
The TPS65911 is the next generation of the TPS65910 family of PMIC chips. It adds a few features: - Watchdog Timer - PWM & LED generators - Comparators for system control status It also adds a set of Interrupts and GPIOs, among other things. The driver exports a function to identify between different versions of the tps65910 family, allowing other modules to identify the capabilities of the current chip. Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27regulator: Remove ↵Axel Lin
MAX8997_REG_BUCK1DVS/MAX8997_REG_BUCK2DVS/MAX8997_REG_BUCK5DVS macros In current implementation, the original macro implementation assumes the caller pass the parameter starting from 1 (to match the register names in datasheet). Thus we have unneeded plus one then minus one operations when using MAX8997_REG_BUCK1DVS/MAX8997_REG_BUCK2DVS/MAX8997_REG_BUCK5DVS macros. This patch removes these macros to avoid unneeded plus one then minus one operations without reducing readability. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27TPS65910: Add tps65910 regulator driverGraeme Gregory
The regulator module consists of 3 DCDCs and 8 LDOs. The output voltages are configurable and are meant to supply power to the main processor and other components Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27TPS65910: IRQ: Add interrupt controllerGraeme Gregory
This module controls the interrupt handling for the tps chip. The interrupt sources are the following: - GPIO falling/rising edge detection - Battery voltage below/above threshold - PWRON signal - PWRHOLD signal - Temperature detection - RTC alarm and periodic event Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27TPS65910: GPIO: Add GPIO driverGraeme Gregory
TPS65910 has one configurable GPIO that can be used for several purposes. Subsequent versions of the TPS chip support more than one GPIO. Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27MFD: TPS65910: Add new mfd device for TPS65910Graeme Gregory
The TPS65910 chip is a power management IC for multimedia and handheld devices. It contains the following components: - Regulators - GPIO controller - RTC The tps65910 core driver is registered as a platform driver and provides communication through I2C with the host device for the different components. Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27regulator: Support voltage offsets to compensate for drops in systemMark Brown
Some systems, particularly physically large systems used for early prototyping, may experience substantial voltage drops between the regulator and the consumers as a result of long traces in the system. With these systems voltages may need to be set higher than requested in order to ensure reliable system operation. Allow systems to work around such hardware issues by allowing constraints to supply an offset to be applied to any requested and reported voltages. This is not ideal, especially since the voltage drop may be load dependant, but is sufficient for most affected systems, it is not expected to be used in production hardware. The offset is applied after all constraint processing so constraints should be specified in terms of consumer values not physically configured values. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-27regulator: Remove supply_regulator_dev from machine configurationMark Brown
supply_regulator_dev (using a struct pointer) has been deprecated in favour of supply_regulator (using a regulator name) for quite a few releases now with a warning generated if it is used and there are no current in tree users so just remove the code. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-05-26[SCSI] libsas: Add option for SATA soft resetDave Jiang
This allows a libsas driver to optionally provide a soft reset handler for libata to drive. The isci driver allows software to control the assertion/deassertion of SRST. [jejb: checkpatch.pl fixes] Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <jbottomley@parallels.com>
2011-05-26arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT}Akinobu Mita
By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT, CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used to test for existence of find bitops anymore. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Greg Ungerer <gerg@uclinux.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26bitops: add #ifndef for each of find bitopsAkinobu Mita
The style that we normally use in asm-generic is to test the macro itself for existence, so in asm-generic, do: #ifndef find_next_zero_bit_le extern unsigned long find_next_zero_bit_le(const void *addr, unsigned long size, unsigned long offset); #endif and in the architectures, write static inline unsigned long find_next_zero_bit_le(const void *addr, unsigned long size, unsigned long offset) #define find_next_zero_bit_le find_next_zero_bit_le This adds the #ifndef for each of the find bitops in the generic header and source files. Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26pid: fix typo in function descriptionSisir Koppaka
finds is misspelt as finr. No functional change. Signed-off-by: Sisir Koppaka <sisir.koppaka@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26ipmi: convert to seq_file interfaceAlexey Dobriyan
The ->read_proc interface is going away, convert to seq_file. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc:Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26fs/proc/vmcore.c: add hook to read_from_oldmem() to check for non-ram pagesOlaf Hering
The balloon driver in a Xen guest frees guest pages and marks them as mmio. When the kernel crashes and the crash kernel attempts to read the oldmem via /proc/vmcore a read from ballooned pages will generate 100% load in dom0 because Xen asks qemu-dm for the page content. Since the reads come in as 8byte requests each ballooned page is tried 512 times. With this change a hook can be registered which checks wether the given pfn is really ram. The hook has to return a value > 0 for ram pages, a value < 0 on error (because the hypercall is not known) and 0 for non-ram pages. This will reduce the time to read /proc/vmcore. Without this change a 512M guest with 128M crashkernel region needs 200 seconds to read it, with this change it takes just 2 seconds. Signed-off-by: Olaf Hering <olaf@aepfle.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26mm: extract exe_file handling from procfsJiri Slaby
Setup and cleanup of mm_struct->exe_file is currently done in fs/proc/. This was because exe_file was needed only for /proc/<pid>/exe. Since we will need the exe_file functionality also for core dumps (so core name can contain full binary path), built this functionality always into the kernel. To achieve that move that out of proc FS to the kernel/ where in fact it should belong. By doing that we can make dup_mm_exe_file static. Also we can drop linux/proc_fs.h inclusion in fs/exec.c and kernel/fork.c. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26asm-generic/ptrace.h: start a common low level ptrace helperMike Frysinger
This is a series of low level ptrace unification steps to make it easier for common code (like KGDB) to poke at register state. This also avoids having to duplicate higher level operations for most ports which don't have special needs for accessing things. This patch: This implements a bunch of helper funcs for poking the registers of a ptrace structure. Now common code should be able to portably update specific registers (like kgdb updating the PC). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Cc: Dongdong Deng <dongdong.deng@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26memcg: add the pagefault count into memcg statsYing Han
Two new stats in per-memcg memory.stat which tracks the number of page faults and number of major page faults. "pgfault" "pgmajfault" They are different from "pgpgin"/"pgpgout" stat which count number of pages charged/discharged to the cgroup and have no meaning of reading/ writing page to disk. It is valuable to track the two stats for both measuring application's performance as well as the efficiency of the kernel page reclaim path. Counting pagefaults per process is useful, but we also need the aggregated value since processes are monitored and controlled in cgroup basis in memcg. Functional test: check the total number of pgfault/pgmajfault of all memcgs and compare with global vmstat value: $ cat /proc/vmstat | grep fault pgfault 1070751 pgmajfault 553 $ cat /dev/cgroup/memory.stat | grep fault pgfault 1071138 pgmajfault 553 total_pgfault 1071142 total_pgmajfault 553 $ cat /dev/cgroup/A/memory.stat | grep fault pgfault 199 pgmajfault 0 total_pgfault 199 total_pgmajfault 0 Performance test: run page fault test(pft) wit 16 thread on faulting in 15G anon pages in 16G container. There is no regression noticed on the "flt/cpu/s" Sample output from pft: TAG pft:anon-sys-default: Gb Thr CLine User System Wall flt/cpu/s fault/wsec 15 16 1 0.67s 233.41s 14.76s 16798.546 266356.260 +-------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 10 16682.962 17344.027 16913.524 16928.812 166.5362 + 10 16695.568 16923.896 16820.604 16824.652 84.816568 No difference proven at 95.0% confidence [akpm@linux-foundation.org: fix build] [hughd@google.com: shmem fix] Signed-off-by: Ying Han <yinghan@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26memcg: rename mem_cgroup_zone_nr_pages() to mem_cgroup_zone_nr_lru_pages()Ying Han
The caller of the function has been renamed to zone_nr_lru_pages(), and this is just fixing up in the memcg code. The current name is easily to be mis-read as zone's total number of pages. Signed-off-by: Ying Han <yinghan@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26memcg: fix get_scan_count() for small targetsKAMEZAWA Hiroyuki
During memory reclaim we determine the number of pages to be scanned per zone as (anon + file) >> priority. Assume scan = (anon + file) >> priority. If scan < SWAP_CLUSTER_MAX, the scan will be skipped for this time and priority gets higher. This has some problems. 1. This increases priority as 1 without any scan. To do scan in this priority, amount of pages should be larger than 512M. If pages>>priority < SWAP_CLUSTER_MAX, it's recorded and scan will be batched, later. (But we lose 1 priority.) If memory size is below 16M, pages >> priority is 0 and no scan in DEF_PRIORITY forever. 2. If zone->all_unreclaimabe==true, it's scanned only when priority==0. So, x86's ZONE_DMA will never be recoverred until the user of pages frees memory by itself. 3. With memcg, the limit of memory can be small. When using small memcg, it gets priority < DEF_PRIORITY-2 very easily and need to call wait_iff_congested(). For doing scan before priorty=9, 64MB of memory should be used. Then, this patch tries to scan SWAP_CLUSTER_MAX of pages in force...when 1. the target is enough small. 2. it's kswapd or memcg reclaim. Then we can avoid rapid priority drop and may be able to recover all_unreclaimable in a small zones. And this patch removes nr_saved_scan. This will allow scanning in this priority even when pages >> priority is very small. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Ying Han <yinghan@google.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26memcg: reclaim memory from nodes in round-robin orderYing Han
Presently, memory cgroup's direct reclaim frees memory from the current node. But this has some troubles. Usually when a set of threads works in a cooperative way, they tend to operate on the same node. So if they hit limits under memcg they will reclaim memory from themselves, damaging the active working set. For example, assume 2 node system which has Node 0 and Node 1 and a memcg which has 1G limit. After some work, file cache remains and the usages are Node 0: 1M Node 1: 998M. and run an application on Node 0, it will eat its foot before freeing unnecessary file caches. This patch adds round-robin for NUMA and adds equal pressure to each node. When using cpuset's spread memory feature, this will work very well. But yes, a better algorithm is needed. [akpm@linux-foundation.org: comment editing] [kamezawa.hiroyu@jp.fujitsu.com: fix time comparisons] Signed-off-by: Ying Han <yinghan@google.com> Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26memcg: count the soft_limit reclaim in global background reclaimYing Han
The global kswapd scans per-zone LRU and reclaims pages regardless of the cgroup. It breaks memory isolation since one cgroup can end up reclaiming pages from another cgroup. Instead we should rely on memcg-aware target reclaim including per-memcg kswapd and soft_limit hierarchical reclaim under memory pressure. In the global background reclaim, we do soft reclaim before scanning the per-zone LRU. However, the return value is ignored. This patch is the first step to skip shrink_zone() if soft_limit reclaim does enough work. This is part of the effort which tries to reduce reclaiming pages in global LRU in memcg. The per-memcg background reclaim patchset further enhances the per-cgroup targetting reclaim, which I should have V4 posted shortly. Try running multiple memory intensive workloads within seperate memcgs. Watch the counters of soft_steal in memory.stat. $ cat /dev/cgroup/A/memory.stat | grep 'soft' soft_steal 240000 soft_scan 240000 total_soft_steal 240000 total_soft_scan 240000 This patch: In the global background reclaim, we do soft reclaim before scanning the per-zone LRU. However, the return value is ignored. We would like to skip shrink_zone() if soft_limit reclaim does enough work. Also, we need to make the memory pressure balanced across per-memcg zones, like the logic vm-core. This patch is the first step where we start with counting the nr_scanned and nr_reclaimed from soft_limit reclaim into the global scan_control. Signed-off-by: Ying Han <yinghan@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26mm: move enum vm_event_item into a standalone header fileAndrew Morton
enums are problematic because they cannot be forward-declared: akpm2:/home/akpm> cat t.c enum foo; static inline void bar(enum foo f) { } akpm2:/home/akpm> gcc -c t.c t.c:4: error: parameter 1 ('f') has incomplete type So move the enum's definition into a standalone header file which can be used wherever its definition is needed. Cc: Ying Han <yinghan@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26cgroup: remove the ns_cgroupDaniel Lezcano
The ns_cgroup is an annoying cgroup at the namespace / cgroup frontier and leads to some problems: * cgroup creation is out-of-control * cgroup name can conflict when pids are looping * it is not possible to have a single process handling a lot of namespaces without falling in a exponential creation time * we may want to create a namespace without creating a cgroup The ns_cgroup was replaced by a compatibility flag 'clone_children', where a newly created cgroup will copy the parent cgroup values. The userspace has to manually create a cgroup and add a task to the 'tasks' file. This patch removes the ns_cgroup as suggested in the following thread: https://lists.linux-foundation.org/pipermail/containers/2009-June/018616.html The 'cgroup_clone' function is removed because it is no longer used. This is a userspace-visible change. Commit 45531757b45c ("cgroup: notify ns_cgroup deprecated") (merged into 2.6.27) caused the kernel to emit a printk warning users that the feature is planned for removal. Since that time we have heard from XXX users who were affected by this. Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr> Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Jamal Hadi Salim <hadi@cyberus.ca> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Acked-by: Matt Helsley <matthltc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26cgroups: add per-thread subsystem callbacksBen Blum
Add cgroup subsystem callbacks for per-thread attachment in atomic contexts Add can_attach_task(), pre_attach(), and attach_task() as new callbacks for cgroups's subsystem interface. Unlike can_attach and attach, these are for per-thread operations, to be called potentially many times when attaching an entire threadgroup. Also, the old "bool threadgroup" interface is removed, as replaced by this. All subsystems are modified for the new interface - of note is cpuset, which requires from/to nodemasks for attach to be globally scoped (though per-cpuset would work too) to persist from its pre_attach to attach_task and attach. This is a pre-patch for cgroup-procs-writable.patch. Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Matt Helsley <matthltc@us.ibm.com> Reviewed-by: Paul Menage <menage@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26cgroups: read-write lock CLONE_THREAD forking per threadgroupBen Blum
Adds functionality to read/write lock CLONE_THREAD fork()ing per-threadgroup Add an rwsem that lives in a threadgroup's signal_struct that's taken for reading in the fork path, under CONFIG_CGROUPS. If another part of the kernel later wants to use such a locking mechanism, the CONFIG_CGROUPS ifdefs should be changed to a higher-up flag that CGROUPS and the other system would both depend on. This is a pre-patch for cgroup-procs-write.patch. Signed-off-by: Ben Blum <bblum@andrew.cmu.edu> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Matt Helsley <matthltc@us.ibm.com> Reviewed-by: Paul Menage <menage@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26drivers/rtc/rtc-mxc.c: remove defines already included in rtc.hWolfram Sang
[akpm@linux-foundation.org: retain the code comments] Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Vladimir Zapolskiy <vzapolskiy@gmail.com> Cc: Alessandro Zummo <alessandro.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26flex_array: avoid divisions when accessing elementsJesse Gross
On most architectures division is an expensive operation and accessing an element currently requires four of them. This performance penalty effectively precludes flex arrays from being used on any kind of fast path. However, two of these divisions can be handled at creation time and the others can be replaced by a reciprocal divide, completely avoiding real divisions on access. [eparis@redhat.com: rebase on top of changes to support 0 len elements] [eparis@redhat.com: initialize part_nr when array fits entirely in base] Signed-off-by: Jesse Gross <jesse@nicira.com> Signed-off-by: Eric Paris <eparis@redhat.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26Merge branches 'core-fixes-for-linus' and 'irq-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: seqlock: Get rid of SEQLOCK_UNLOCKED * 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: irq: Remove smp_affinity_list when unregister irq proc
2011-05-26Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'gpio/next' of git://git.secretlab.ca/git/linux-2.6: gpio/via: rename VIA local config struct basic_mmio_gpio: split into a gpio library and platform device gpio: remove some legacy comments in build files gpio: add trace events for setting direction and value gpio/pca953x: Use handle_simple_irq instead of handle_edge_irq gpiolib: export gpiochip_find gpio: remove redundant Kconfig depends on GPIOLIB basic_mmio_gpio: convert to non-__raw* accessors basic_mmio_gpio: support direction registers basic_mmio_gpio: support different input/output registers basic_mmio_gpio: detect output method at probe time basic_mmio_gpio: request register regions basic_mmio_gpio: allow overriding number of gpio basic_mmio_gpio: convert to platform_{get,set}_drvdata() basic_mmio_gpio: remove runtime width/endianness evaluation
2011-05-26Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6 * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (57 commits) regulator: Fix 88pm8607.c printk format warning input: Add support for Qualcomm PMIC8XXX power key input: Add Qualcomm pm8xxx keypad controller driver mfd: Add omap-usbhs runtime PM support mfd: Fix ASIC3 SD Host Controller Configuration size mfd: Fix omap_usbhs_alloc_children error handling mfd: Fix omap usbhs crash when rmmoding ehci or ohci mfd: Add ASIC3 LED support leds: Add ASIC3 LED support mfd: Update twl4030-code maintainer e-mail address mfd: Correct the name and bitmask for ab8500-gpadc BTempPullUp mfd: Add manual ab8500-gpadc batt temp activation for AB8500 3.0 mfd: Provide ab8500-core enumerators for chip cuts mfd: Check twl4030-power remove script error condition after i2cwrite mfd: Fix twl6030 irq definitions mfd: Add phoenix lite (twl6025) support to twl6030 mfd: Avoid to use constraint name in 88pm860x regulator driver mfd: Remove checking on max8925 regulator[0] mfd: Remove unused parameter from 88pm860x API mfd: Avoid to allocate 88pm860x static platform data ...
2011-05-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: RDMA/cma: Save PID of ID's owner RDMA/cma: Add support for netlink statistics export RDMA/cma: Pass QP type into rdma_create_id() RDMA: Update exported headers list RDMA/cma: Export enum cma_state in <rdma/rdma_cm.h> RDMA/nes: Add a check for strict_strtoul() RDMA/cxgb3: Don't post zero-byte read if endpoint is going away RDMA/cxgb4: Use completion objects for event blocking IB/srp: Fix integer -> pointer cast warnings IB: Add devnode methods to cm_class and umad_class IB/mad: Return EPROTONOSUPPORT when an RDMA device lacks the QP required IB/uverbs: Add devnode method to set path/mode RDMA/ucma: Add .nodename/.mode to tell userspace where to create device node RDMA: Add netlink infrastructure RDMA: Add error handling to ib_core_init()
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