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2010-03-01Merge branch 'for-2.6.34' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds1-0/+14
* 'for-2.6.34' of git://git.kernel.dk/linux-2.6-block: (38 commits) block: don't access jiffies when initialising io_context cfq: remove 8 bytes of padding from cfq_rb_root on 64 bit builds block: fix for "Consolidate phys_segment and hw_segment limits" cfq-iosched: quantum check tweak blktrace: perform cleanup after setup error blkdev: fix merge_bvec_fn return value checks cfq-iosched: requests "in flight" vs "in driver" clarification cciss: Fix problem with scatter gather elements in the scsi half of the driver cciss: eliminate unnecessary pointer use in cciss scsi code cciss: do not use void pointer for scsi hba data cciss: factor out scatter gather chain block mapping code cciss: fix scatter gather chain block dma direction kludge cciss: simplify scatter gather code cciss: factor out scatter gather chain block allocation and freeing cciss: detect bad alignment of scsi commands at build time cciss: clarify command list padding calculation cfq-iosched: rethink seeky detection for SSDs cfq-iosched: rework seeky detection block: remove padding from io_context on 64bit builds block: Consolidate phys_segment and hw_segment limits ...
2010-02-26PM: Add facility for advanced testing of async suspend/resumeRafael J. Wysocki1-0/+26
Add configuration switch CONFIG_PM_ADVANCED_DEBUG for compiling in extra PM debugging/testing code allowing one to access some PM-related attributes of devices from the user space via sysfs. If CONFIG_PM_ADVANCED_DEBUG is set, add sysfs attribute power/async for every device allowing the user space to access the device's power.async_suspend flag and modify it, if desired. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2010-02-26PM: Add a switch for disabling/enabling asynchronous suspend/resumeRafael J. Wysocki1-0/+13
Add sysfs attribute /sys/power/pm_async allowing the user space to disable/enable asynchronous suspend/resume of devices. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2010-02-26PM: Document device power attributes in sysfsRafael J. Wysocki1-0/+53
There are sysfs attributes in /sys/devices/.../power/ that haven't been documented yet in Documentation/ABI/. Document them as appropriate. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2010-02-22Merge branch 'master' into for-2.6.34Jens Axboe1-6/+6
2010-02-07ima: rename PATH_CHECK to FILE_CHECKMimi Zohar1-6/+6
With the movement of the ima hooks functions were renamed from *path* to *file* since they always deal with struct file. This patch renames some of the ima internal flags to make them consistent with the rest of the code. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-01-29block: Added in stricter no merge semantics for block I/OAlan D. Brunelle1-0/+14
Updated 'nomerges' tunable to accept a value of '2' - indicating that _no_ merges at all are to be attempted (not even the simple one-hit cache). The following table illustrates the additional benefit - 5 minute runs of a random I/O load were applied to a dozen devices on a 16-way x86_64 system. nomerges Throughput %System Improvement (tput / %sys) -------- ------------ ----------- ------------------------- 0 12.45 MB/sec 0.669365609 1 12.50 MB/sec 0.641519199 0.40% / 2.71% 2 12.52 MB/sec 0.639849750 0.56% / 2.96% Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-12-23USB: power management documentation updateAlan Stern1-8/+10
This patch (as1313) updates the documentation concerning USB power management. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-16HWPOISON: Add soft page offline supportAndi Kleen1-0/+44
This is a simpler, gentler variant of memory_failure() for soft page offlining controlled from user space. It doesn't kill anything, just tries to invalidate and if that doesn't work migrate the page away. This is useful for predictive failure analysis, where a page has a high rate of corrected errors, but hasn't gone bad yet. Instead it can be offlined early and avoided. The offlining is controlled from sysfs, including a new generic entry point for hard page offlining for symmetry too. We use the page isolate facility to prevent re-allocation race. Normally this is only used by memory hotplug. To avoid races with memory allocation I am using lock_system_sleep(). This avoids the situation where memory hotplug is about to isolate a page range and then hwpoison undoes that work. This is a big hammer currently, but the simplest solution currently. When the page is not free or LRU we try to free pages from slab and other caches. The slab freeing is currently quite dumb and does not try to focus on the specific slab cache which might own the page. This could be potentially improved later. Thanks to Fengguang Wu and Haicheng Li for some fixes. [Added fix from Andrew Morton to adapt to new migrate_pages prototype] Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-12-15Documentation: ABI: /sys/devices/system/cpu/cpu#/nodeAlex Chiang1-0/+14
Describe NUMA node symlink created for CPUs when CONFIG_NUMA is set. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-15mm: add numa node symlink for memory section in sysfsAlex Chiang1-1/+13
Commit c04fc586c (mm: show node to memory section relationship with symlinks in sysfs) created symlinks from nodes to memory sections, e.g. /sys/devices/system/node/node1/memory135 -> ../../memory/memory135 If you're examining the memory section though and are wondering what node it might belong to, you can find it by grovelling around in sysfs, but it's a little cumbersome. Add a reverse symlink for each memory section that points back to the node to which it belongs. Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Gary Hade <garyhade@us.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-13Merge branch 'next' of ↵Linus Torvalds1-0/+15
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (151 commits) powerpc: Fix usage of 64-bit instruction in 32-bit altivec code MAINTAINERS: Add PowerPC patterns powerpc/pseries: Track previous CPPR values to correctly EOI interrupts powerpc/pseries: Correct pseries/dlpar.c build break without CONFIG_SMP powerpc: Make "intspec" pointers in irq_host->xlate() const powerpc/8xx: DTLB Miss cleanup powerpc/8xx: Remove DIRTY pte handling in DTLB Error. powerpc/8xx: Start using dcbX instructions in various copy routines powerpc/8xx: Restore _PAGE_WRITETHRU powerpc/8xx: Add missing Guarded setting in DTLB Error. powerpc/8xx: Fixup DAR from buggy dcbX instructions. powerpc/8xx: Tag DAR with 0x00f0 to catch buggy instructions. powerpc/8xx: Update TLB asm so it behaves as linux mm expects. powerpc/8xx: Invalidate non present TLBs powerpc/pseries: Serialize cpu hotplug operations during deactivate Vs deallocate pseries/pseries: Add code to online/offline CPUs of a DLPAR node powerpc: stop_this_cpu: remove the cpu from the online map. powerpc/pseries: Add kernel based CPU DLPAR handling sysfs/cpu: Add probe/release files powerpc/pseries: Kernel DLPAR Infrastructure ...
2009-12-12Merge branches 'slab/fixes', 'slab/kmemleak', 'slub/perf' and 'slub/stats' ↵Pekka Enberg1-51/+58
into for-linus
2009-12-12Merge branch 'next' of ↵Linus Torvalds1-0/+18
git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface [CPUFREQ] make internal cpufreq_add_dev_* static [CPUFREQ] use an enum for speedstep processor identification [CPUFREQ] Document units for transition latency [CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings [CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/ [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used [CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c
2009-12-11USB: add remove_id sysfs attr for usb driversCHENG Renquan1-0/+13
Accroding commit 0994375e, which is adding remove_id sysfs attr for pci drivers, for management tools dynamically bind/unbind a pci/usb devices to a specified drivers; with this patch, the management tools can be simplied. And the original code didn't handle the failure of usb_create_newid_file, fixed in this patch. Signed-off-by: CHENG Renquan <rqcheng@smu.edu.sg> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-11USB: wusb: add wusb_phy_rate sysfs file to host controllersDavid Vrabel1-0/+13
Add the wusb_phy_rate sysfs file to Wireless USB host controllers. This sets the maximum PHY rate that will be used for all connected devices. Signed-off-by: David Vrabel <david.vrabel@csr.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-10Merge branch 'for-linus' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (42 commits) tree-wide: fix misspelling of "definition" in comments reiserfs: fix misspelling of "journaled" doc: Fix a typo in slub.txt. inotify: remove superfluous return code check hdlc: spelling fix in find_pvc() comment doc: fix regulator docs cut-and-pasteism mtd: Fix comment in Kconfig doc: Fix IRQ chip docs tree-wide: fix assorted typos all over the place drivers/ata/libata-sff.c: comment spelling fixes fix typos/grammos in Documentation/edac.txt sysctl: add missing comments fs/debugfs/inode.c: fix comment typos sgivwfb: Make use of ARRAY_SIZE. sky2: fix sky2_link_down copy/paste comment error tree-wide: fix typos "couter" -> "counter" tree-wide: fix typos "offest" -> "offset" fix kerneldoc for set_irq_msi() spidev: fix double "of of" in comment comment typo fix: sybsystem -> subsystem ...
2009-12-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds1-0/+8
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (222 commits) [SCSI] zfcp: Remove flag ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP [SCSI] zfcp: Activate fc4s attributes for zfcp in FC transport class [SCSI] zfcp: Block scsi_eh thread for rport state BLOCKED [SCSI] zfcp: Update FSF error reporting [SCSI] zfcp: Improve ELS ADISC handling [SCSI] zfcp: Simplify handling of ct and els requests [SCSI] zfcp: Remove ZFCP_DID_MASK [SCSI] zfcp: Move WKA port to zfcp FC code [SCSI] zfcp: Use common code definitions for FC CT structs [SCSI] zfcp: Use common code definitions for FC ELS structs [SCSI] zfcp: Update FCP protocol related code [SCSI] zfcp: Dont fail SCSI commands when transitioning to blocked fc_rport [SCSI] zfcp: Assign scheduled work to driver queue [SCSI] zfcp: Remove STATUS_COMMON_REMOVE flag as it is not required anymore [SCSI] zfcp: Implement module unloading [SCSI] zfcp: Merge trace code for fsf requests in one function [SCSI] zfcp: Access ports and units with container_of in sysfs code [SCSI] zfcp: Remove suspend callback [SCSI] zfcp: Remove global config_mutex [SCSI] zfcp: Replace local reference counting with common kref ...
2009-12-09sysfs/cpu: Add probe/release filesNathan Fontenot1-0/+15
Version 3 of this patch is updated with documentation added to Documentation/ABI. There are no changes to any of the C code from v2 of the patch. In order to support kernel DLPAR of CPU resources we need to provide an interface to add (probe) and remove (release) the resource from the system. This patch Creates new generic probe and release sysfs files to facilitate cpu probe/release. The probe/release interface provides for allowing each arch to supply their own routines for implementing the backend of adding and removing cpus to/from the system. This also creates the powerpc specific stubs to handle the arch callouts from writes to the sysfs files. The creation and use of these files is regulated by the CONFIG_ARCH_CPU_PROBE_RELEASE option so that only architectures that need the capability will have the files created. Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-04[SCSI] qla2xxx: Add firmware-dump kobject uevent notification.Andrew Vasquez1-0/+8
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04tree-wide: fix assorted typos all over the placeAndré Goddard Rosa2-2/+2
That is "success", "unknown", "through", "performance", "[re|un]mapping" , "access", "default", "reasonable", "[con]currently", "temperature" , "channel", "[un]used", "application", "example","hierarchy", "therefore" , "[over|under]flow", "contiguous", "threshold", "enough" and others. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-11-24[CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/Alex Chiang1-0/+18
This is a complex interface and is already described in Documentation/cpu-freq/, especially in the user-guide.txt file. No need to copy/paste all that information. Let's just alert the reader to the presence of the user-guide. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Dave Jones <davej@redhat.com>
2009-10-31Documentation: ABI: /sys/devices/system/cpu/cpu#/nodeAlex Chiang1-0/+15
Describe NUMA node symlink created for CPUs when CONFIG_NUMA is set. Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: /sys/devices/system/cpu/cpuidle/Alex Chiang1-0/+20
Document cpuidle sysfs attributes by reading code, Documentation/cpuidle/, and git logs. Cc: Venki Pallipadi <venkatesh.pallipadi@intel.com> Cc: Len Brown <lenb@kernel.org> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: /sys/devices/system/cpu/sched_[mc|smt]_power_savingsAlex Chiang1-0/+24
Document sched_[mc|smt]_power_savings by reading existing code and git logs. Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: /sys/devices/system/cpu/cpu#/ topology filesAlex Chiang1-0/+39
Add brief descriptions for the following sysfs files: /sys/devices/system/cpu/cpu#/topology/core_id /sys/devices/system/cpu/cpu#/topology/core_siblings /sys/devices/system/cpu/cpu#/topology/core_siblings_list /sys/devices/system/cpu/cpu#/topology/physical_package_id /sys/devices/system/cpu/cpu#/topology/thread_siblings /sys/devices/system/cpu/cpu#/topology/thread_siblings_list The descriptions in Documentation/cputopology.txt weren't very informative, so I attempted a better description based on code reading and hopeful guessing. Updated Documentation/cputopology.txt with the better descriptions and fixed some style issues. Cc: Mike Travis <travis@sgi.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: /sys/devices/system/cpu/ topology filesAlex Chiang1-0/+28
Add brief descriptions for the following sysfs files: /sys/devices/system/cpu/kernel_max /sys/devices/system/cpu/offline /sys/devices/system/cpu/online /sys/devices/system/cpu/possible /sys/devices/system/cpu/present Excerpted the relevant information from Documentation/cputopology.txt and pointed back to cputopology.txt as the authoritative source of information. Cc: Mike Travis <travis@sgi.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: document /sys/devices/system/cpu/Alex Chiang1-0/+12
This interface has been around for a long time, but hasn't been officially documented. Document the top level sysfs directory for CPU attributes. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-31Documentation: ABI: rename sysfs-devices-cache_disable properlyAlex Chiang1-0/+0
Rename sysfs-devices-cache_disable to sysfs-devices-system-cpu, in order to keep a stricter correlation between a sysfs directory and its documentation. Reported-by: David Rientjes <rientjes@google.com> Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-15slub: allow stats to be clearedDavid Rientjes1-51/+58
When collecting slub stats for particular workloads, it's necessary to collect each statistic for all caches before the job is even started because the counters are usually greater than zero just from boot and initialization. This allows a statistic to be cleared on each cpu by writing '0' to its sysfs file. This creates a baseline for statistics of interest before the workload is started. Setting a statistic to a particular value is not supported, so all values written to these files other than '0' returns -EINVAL. Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-10-15USB: rename Documentation/ABI/.../sysfs-class-usb_hostDavid Vrabel1-2/+2
The usb_host class is no more. Rename its documentation file (which only contained WUSB specific files) to .../sysfs-class-uwb_rc-wusbhc. Signed-off-by: David Vrabel <david.vrabel@csr.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-01cciss: Add usage_count attribute to each logical drive in /sysStephen M. Cameron1-0/+7
Add usage_count attribute to each logical drive at /sys/devices/<dev>/ccissX/cXdY/usage_count for controller X, logical drive Y. The usage count is the number of times the device has currently been opened. Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-01cciss: Add a "raid_level" attribute to each logical drive in /sysStephen M. Cameron1-0/+7
and change get rid of some magic numbers in raid lavel decoding. Add raid_level attribute to each logical drive at /sys/devices/<dev>/ccissX/cXdY/raid_level for controller X, logical drive Y Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-01cciss: Add lunid attribute to each logical drive in /sysStephen M. Cameron1-0/+7
Add lunid attribute to each logical drive at /sys/devices/<dev>/ccissX/cXdY/lunid for controller X, logical drive Y Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-10-01cciss: Allow triggering of rescan of logical drive topology via sysfs entryAndrew Patterson1-0/+7
Added /sys/bus/pci/devices/<dev>/ccissX/rescan sysfs entry used to kick off a rescan that discovers logical drive topology changes. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Acked-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-09-23Merge branch 'release' of ↵Linus Torvalds5-0/+189
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (119 commits) ACPI: don't pass handle for fixed hardware notifications ACPI: remove null pointer checks in deferred execution path ACPI: simplify deferred execution path acerhdf: additional BIOS versions acerhdf: convert to dev_pm_ops acerhdf: fix fan control for AOA150 model thermal: add missing Kconfig dependency acpi: switch /proc/acpi/{debug_layer,debug_level} to seq_file hp-wmi: fix rfkill memory leak on unload ACPI: remove unnecessary #ifdef CONFIG_DMI ACPI: linux/acpi.h should not include linux/dmi.h hwmon driver for ACPI 4.0 power meters topstar-laptop: add new driver for hotkeys support on Topstar N01 thinkpad_acpi: fix rfkill memory leak on unload thinkpad-acpi: report brightness events when required thinkpad-acpi: don't poll by default any of the reserved hotkeys thinkpad-acpi: Fix procfs hotkey reset command thinkpad-acpi: deprecate hotkey_bios_mask thinkpad-acpi: hotkey poll fixes thinkpad-acpi: be more strict when detecting a ThinkPad ...
2009-09-23gpiolib: allow poll() on valueDaniel Glöckner1-0/+1
Many gpio chips allow to generate interrupts when the value of a pin changes. This patch gives usermode application the opportunity to make use of this feature by calling poll(2) on the /sys/class/gpio/gpioN/value sysfs file. The edge to trigger can be set in the edge file in the same directory. Possible values are "none", "rising", "falling", and "both". Using level triggers is not possible with current sysfs since nothing changes the GPIO value (and the IRQ keeps triggering). Edge triggering will "just work". Note that if there was an event between read() and poll(), the poll() returns immediately. Also note that this version only supports true GPIO interrupts. Some later patch might be able to synthesize this behavior by timer-driven polling; some systems seem to need that. [dbrownell@users.sourceforge.net: align ids to 16 bit ids; whitespace] Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-19Merge branch 'asus' into releaseLen Brown5-0/+189
2009-09-10PCI: expose function reset capability in sysfsMichael S. Tsirkin1-0/+10
Some devices allow an individual function to be reset without affecting other functions in the same device: that's what pci_reset_function does. For devices that have this support, expose reset attribite in sysfs. This is useful e.g. for virtualization, where a qemu userspace process wants to reset the device when the guest is reset, to emulate machine reboot as closely as possible. Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-08-28asus-laptop: document sysfs interfaceCorentin Chary1-0/+52
Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28led: document sysfs interfaceCorentin Chary1-0/+28
Also fix Documentation/led-class.txt, the acceptable range of values for brightness is 0-max_brightness, not 0-255. Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28video/lcd: document sysfs interfaceCorentin Chary1-0/+23
Date and KernelVersion may be wrong because the lcd interface was introduced before git initial import. Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28video/backlight: document sysfs interfaceCorentin Chary1-0/+36
Date and KernelVersion may be wrong because the backlight interface was introduced before git initial import. Cc:Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-28eeepc-laptop: document sysfs interfaceCorentin Chary1-0/+50
Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-01block: Update topology documentationMartin K. Petersen1-14/+23
Update topology comments and sysfs documentation based upon discussions with Neil Brown. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-06-23Merge git://git.infradead.org/mtd-2.6Linus Torvalds1-0/+125
* git://git.infradead.org/mtd-2.6: (63 commits) mtd: OneNAND: Allow setting of boundary information when built as module jffs2: leaking jffs2_summary in function jffs2_scan_medium mtd: nand: Fix memory leak on txx9ndfmc probe failure. mtd: orion_nand: use burst reads with double word accesses mtd/nand: s3c6400 support for s3c2410 driver [MTD] [NAND] S3C2410: Use DIV_ROUND_UP [MTD] [NAND] S3C2410: Deal with unaligned lengths in S3C2440 buffer read/write [MTD] [NAND] S3C2410: Allow the machine code to get the BBT table from NAND [MTD] [NAND] S3C2410: Added a kerneldoc for s3c2410_nand_set mtd: physmap_of: Add multiple regions and concatenation support mtd: nand: max_retries off by one in mxc_nand mtd: nand: s3c2410_nand_setrate(): use correct macros for 2412/2440 mtd: onenand: add bbt_wait & unlock_all as replaceable for some platform mtd: Flex-OneNAND support mtd: nand: add OMAP2/OMAP3 NAND driver mtd: maps: Blackfin async: fix memory leaks in probe/remove funcs mtd: uclinux: mark local stuff static mtd: uclinux: do not allow to be built as a module mtd: uclinux: allow systems to override map addr/size mtd: blackfin NFC: fix hang when using NAND on BF527-EZKITs ...
2009-06-22Merge branch 'linux-next' of ↵Linus Torvalds1-0/+7
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (74 commits) PCI: make msi_free_irqs() to use msix_mask_irq() instead of open coded write PCI: Fix the NIU MSI-X problem in a better way PCI ASPM: remove get_root_port_link PCI ASPM: cleanup pcie_aspm_sanity_check PCI ASPM: remove has_switch field PCI ASPM: cleanup calc_Lx_latency PCI ASPM: cleanup pcie_aspm_get_cap_device PCI ASPM: cleanup clkpm checks PCI ASPM: cleanup __pcie_aspm_check_state_one PCI ASPM: cleanup initialization PCI ASPM: cleanup change input argument of aspm functions PCI ASPM: cleanup misc in struct pcie_link_state PCI ASPM: cleanup clkpm state in struct pcie_link_state PCI ASPM: cleanup latency field in struct pcie_link_state PCI ASPM: cleanup aspm state field in struct pcie_link_state PCI ASPM: fix typo in struct pcie_link_state PCI: drivers/pci/slot.c should depend on CONFIG_SYSFS PCI: remove redundant __msi_set_enable() PCI PM: consistently use type bool for wake enable variable x86/ACPI: Correct maximum allowed _CRS returned resources and warn if exceeded ...
2009-06-19Merge branch 'for_linus' of ↵Linus Torvalds1-0/+10
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: jbd2: clean up jbd2_journal_try_to_free_buffers() ext4: Don't update ctime for non-extent-mapped inodes ext4: Fix up whitespace issues in fs/ext4/inode.c ext4: Fix 64-bit block type problem on 32-bit platforms ext4: teach the inode allocator to use a goal inode number ext4: Use a hash of the topdir directory name for the Orlov parent group ext4: document the "abort" mount option ext4: move the abort flag from s_mount_opts to s_mount_flags ext4: update the s_last_mounted field in the superblock ext4: change s_mount_opt to be an unsigned int ext4: online defrag -- Add EXT4_IOC_MOVE_EXT ioctl ext4: avoid unnecessary spinlock in critical POSIX ACL path ext3: avoid unnecessary spinlock in critical POSIX ACL path ext4: convert instrumentation from markers to tracepoints jbd2: convert instrumentation from markers to tracepoints
2009-06-19LinuxPPS: core supportRodolfo Giometti1-0/+73
This patch adds the kernel side of the PPS support currently named "LinuxPPS". PPS means "pulse per second" and a PPS source is just a device which provides a high precision signal each second so that an application can use it to adjust system clock time. Common use is the combination of the NTPD as userland program with a GPS receiver as PPS source to obtain a wallclock-time with sub-millisecond synchronisation to UTC. To obtain this goal the userland programs shoud use the PPS API specification (RFC 2783 - Pulse-Per-Second API for UNIX-like Operating Systems, Version 1.0) which in part is implemented by this patch. It provides a set of chars devices, one per PPS source, which can be used to get the time signal. The RFC's functions can be implemented by accessing to these char devices. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Greg KH <greg@kroah.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17PCI hotplug: create symlink to hotplug driver moduleKenji Kaneshige1-0/+7
Create symbolic link to hotplug driver module in the PCI slot directory (/sys/bus/pci/slots/<SLOT#>). In the past, we need to load hotplug drivers one by one to identify the hotplug driver that handles the slot, and it was very inconvenient especially for trouble shooting. With this change, we can easily identify the hotplug driver. Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Reviewed-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>