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2011-07-13net: Add documentation for netdev features handlingMichał Mirosław
v2: incorporated suggestions from Randy Dunlap Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-08Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
2011-07-07net: doc: fix compile warning of no format arguments in ifenslave.cShan Wei
Fix following warning in ifenslave.c with gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4). Documentation/networking/ifenslave.c:263:4: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:271:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:277:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:285:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:291:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:292:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:312:4: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:323:3: warning: format not a string literal and no format arguments Documentation/networking/ifenslave.c:342:4: warning: format not a string literal and no format arguments Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-06Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2011-07-05NFC: add Documentation/networking/nfc.txtAloisio Almeida Jr
Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@openbossa.org> Signed-off-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-07-05Update documented default values for various TCP/UDP tunablesMax Matveev
tcp_rmem and tcp_wmem use 1 page as default value for the minimum amount of memory to be used, same as udp_wmem_min and udp_rmem_min. Pages are different size on different architectures - use the right units when describing the defaults. Reviewed-by: Shan Wei <shanwei@cn.fujitsu.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Max Matveev <makc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-05Update description of net.sctp.sctp_rmem and net.sctp.sctp_wmem tunablesMax Matveev
sctp does not use second and third ("default" and "max") values of sctp_rmem tunable. The format is the same as tcp_rmem but the meaning is different so make the documentation explicit to avoid confusion. sctp_wmem is not used at all. Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Max Matveev <makc@redhat.com> Reviewed-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-28Merge branch 'usb-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 * 'usb-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: MAINTAINERS: add myself as maintainer of USB/IP usb: r8a66597-hcd: fix cannot detect low/full speed device USB: ehci-ath79: fix a NULL pointer dereference USB: Add new FT232H chip to drivers/usb/serial/ftdi_sio.c usb/isp1760: Fix bug preventing the unlinking of control urbs USB: Fix up URB error codes to reflect implementation. xhci: Always set urb->status to zero for isoc endpoints. xhci: Add reset on resume quirk for asrock p67 host xHCI 1.0: Incompatible Device Error USB: don't let errors prevent system sleep USB: don't let the hub driver prevent system sleep USB: change maintainership of ohci-hcd and ehci-hcd xHCI 1.0: Force Stopped Event(FSE) xhci: Don't warn about zeroed bMaxBurst descriptor field. USB: Free bandwidth when usb_disable_device is called. xhci: Reject double add of active endpoints. USB: TI 3410/5052 USB Serial Driver: Fix mem leak when firmware is too big. usb: musb: gadget: clear TXPKTRDY flag when set FLUSHFIFO usb: musb: host: compare status for negative error values
2011-06-21PM / Domains: Update documentationRafael J. Wysocki
Commit 4d27e9dcff00a6425d779b065ec8892e4f391661 (PM: Make power domain callbacks take precedence over subsystem ones) forgot to update the device power management documentation to take changes made by it into account. Correct that mistake. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-06-21PM: Update documentation regarding sysdevsRafael J. Wysocki
The part of Documentation/power/devices.txt regarding sysdevs is not valid any more after commit 2e711c04dbbf7a7732a3f7073b1fc285d12b369d (PM: Remove sysdev suspend, resume and shutdown operations), so remove it. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-06-21PM / Runtime: Update doc: usage count no longer incremented across system PMKevin Hilman
Commit e8665002477f0278f84f898145b1f141ba26ee26 (PM: Allow pm_runtime_suspend() to succeed during system suspend) removed usage count increment across system PM. Update doc to reflect this. Signed-off-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2011-06-21Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-agn-rxon.c drivers/net/wireless/rtlwifi/pci.c net/netfilter/ipvs/ip_vs_core.c
2011-06-19Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rcu: Move RCU_BOOST #ifdefs to header file rcu: use softirq instead of kthreads except when RCU_BOOST=y rcu: Use softirq to address performance regression rcu: Simplify curing of load woes
2011-06-17USB: Fix up URB error codes to reflect implementation.Sarah Sharp
Documentation/usb/error-codes.txt mentions that urb->status can be set to -EXDEV, if the isochronous transfer was not fully completed. However, in practice, EHCI, UHCI, and OHCI all only set -EXDEV in the individual frame status, never in the URB status. Those host controller actually always pass in a zero status to usb_hcd_giveback_urb, and rely on the core to set the appropriate status value. The xHCI driver ran into issues with the uvcvideo driver when it tried to set -EXDEV in urb->status, because the driver refused to submit URBs, and the userspace camera application's video froze. Clean up the documentation to reflect the actual implementation. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Acked-by: Alan Stern <stern@rowland.harvard.edu>
2011-06-16Documentation: fix cgroup typos and formattingJörg Sommer
Fix format and spelling. Signed-off-by: Jörg Sommer <joerg@alea.gnuu.de> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16Documentation: update cgroupfs mount pointJörg Sommer
According to commit 676db4af0430 ("cgroupfs: create /sys/fs/cgroup to mount cgroupfs on") the canonical mountpoint for the cgroup filesystem is /sys/fs/cgroup. Hence, this should be used in the documentation. Signed-off-by: Jörg Sommer <joerg@alea.gnuu.de> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16Documentation: update kmemleak supported archsMaxin B. John
Instead of listing the architectures that are supported by kmemleak in Documentation/kmemleak.txt, just refer people to the list of supported architecutures in lib/Kconfig.debug so that Documentation/kmemleak.txt does not need more updates for this. Signed-off-by: Maxin B. John <maxin.john@gmail.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16Documentation: update printk-formats.txtAndrew Murray
This patch updates the incomplete documentation concerning the printk extended format specifiers. Signed-off-by: Andrew Murray <amurray@mpc-data.co.uk> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16Documentation/feature-removal-schedule.txt: remove ns_cgroup from ↵akpm@linux-foundation.org
feature-removal-schedule.txt Commit a77aea92010acf ("cgroup: remove the ns_cgroup") removed the ns_cgroup but it forgot to remove the related doc in feature-removal-schedule.txt. Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Daniel Lezcano <daniel.lezcano@free.fr> Cc: Serge E. Hallyn <serge.hallyn@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16memcg: add documentation for the memory.numastat APIYing Han
[akpm@linux-foundation.org: rework text, fit it into 80-cols] Signed-off-by: Ying Han <yinghan@google.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-16backlight: new driver for the ADP8870 backlight devicesMichael Hennerich
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-14rcu: Use softirq to address performance regressionShaohua Li
Commit a26ac2455ffcf3(rcu: move TREE_RCU from softirq to kthread) introduced performance regression. In an AIM7 test, this commit degraded performance by about 40%. The commit runs rcu callbacks in a kthread instead of softirq. We observed high rate of context switch which is caused by this. Out test system has 64 CPUs and HZ is 1000, so we saw more than 64k context switch per second which is caused by RCU's per-CPU kthread. A trace showed that most of the time the RCU per-CPU kthread doesn't actually handle any callbacks, but instead just does a very small amount of work handling grace periods. This means that RCU's per-CPU kthreads are making the scheduler do quite a bit of work in order to allow a very small amount of RCU-related processing to be done. Alex Shi's analysis determined that this slowdown is due to lock contention within the scheduler. Unfortunately, as Peter Zijlstra points out, the scheduler's real-time semantics require global action, which means that this contention is inherent in real-time scheduling. (Yes, perhaps someone will come up with a workaround -- otherwise, -rt is not going to do well on large SMP systems -- but this patch will work around this issue in the meantime. And "the meantime" might well be forever.) This patch therefore re-introduces softirq processing to RCU, but only for core RCU work. RCU callbacks are still executed in kthread context, so that only a small amount of RCU work runs in softirq context in the common case. This should minimize ksoftirqd execution, allowing us to skip boosting of ksoftirqd for CONFIG_RCU_BOOST=y kernels. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Tested-by: "Alex,Shi" <alex.shi@intel.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2011-06-14Merge branch 'for-linus' of git://neil.brown.name/mdLinus Torvalds
* 'for-linus' of git://neil.brown.name/md: md/raid5: remove unusual use of bio_iovec_idx() md/raid5: fix FUA request handling in ops_run_io() md/raid5: fix raid5_set_bi_hw_segments md:Documentation/md.txt - fix typo md/bitmap: remove unused fields from struct bitmap md/bitmap: use proper accessor macro md: check ->hot_remove_disk when removing disk md: Using poll /proc/mdstat can monitor the events of adding a spare disks MD: use is_power_of_2 macro MD: raid5 do not set fullsync MD: support initial bitmap creation in-kernel MD: add sync_super to mddev_t struct MD: raid1 changes to allow use by device mapper MD: move thread wakeups into resume MD: possible typo MD: no sync IO while suspended MD: no integrity register if no gendisk
2011-06-09md:Documentation/md.txt - fix typoNeilBrown
Reported-by: CoolCold <coolthecold@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
2011-06-09inetpeer: remove unused listEric Dumazet
Andi Kleen and Tim Chen reported huge contention on inetpeer unused_peers.lock, on memcached workload on a 40 core machine, with disabled route cache. It appears we constantly flip peers refcnt between 0 and 1 values, and we must insert/remove peers from unused_peers.list, holding a contended spinlock. Remove this list completely and perform a garbage collection on-the-fly, at lookup time, using the expired nodes we met during the tree traversal. This removes a lot of code, makes locking more standard, and obsoletes two sysctls (inet_peer_gc_mintime and inet_peer_gc_maxtime). This also removes two pointers in inet_peer structure. There is still a false sharing effect because refcnt is in first cache line of object [were the links and keys used by lookups are located], we might move it at the end of inet_peer structure to let this first cache line mostly read by cpus. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Andi Kleen <andi@firstfloor.org> CC: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-07usb-storage: redo incorrect readsAlan Stern
Some USB mass-storage devices have bugs that cause them not to handle the first READ(10) command they receive correctly. The Corsair Padlock v2 returns completely bogus data for its first read (possibly it returns the data in encrypted form even though the device is supposed to be unlocked). The Feiya SD/SDHC card reader fails to complete the first READ(10) command after it is plugged in or after a new card is inserted, returning a status code that indicates it thinks the command was invalid, which prevents the kernel from retrying the read. Since the first read of a new device or a new medium is for the partition sector, the kernel is unable to retrieve the device's partition table. Users have to manually issue an "hdparm -z" or "blockdev --rereadpt" command before they can access the device. This patch (as1470) works around the problem. It adds a new quirk flag, US_FL_INVALID_READ10, indicating that the first READ(10) should always be retried immediately, as should any failing READ(10) commands (provided the preceding READ(10) command succeeded, to avoid getting stuck in a loop). The patch also adds appropriate unusual_devs entries containing the new flag. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Sven Geggus <sven-usbst@geggus.net> Tested-by: Paul Hartman <paul.hartman+linux@gmail.com> CC: Matthew Dharm <mdharm-usb@one-eyed-alien.net> CC: <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-06-01Merge git://git.infradead.org/iommu-2.6Linus Torvalds
* git://git.infradead.org/iommu-2.6: intel-iommu: Fix off-by-one in RMRR setup intel-iommu: Add domain check in domain_remove_one_dev_info intel-iommu: Remove Host Bridge devices from identity mapping intel-iommu: Use coherent DMA mask when requested intel-iommu: Dont cache iova above 32bit intel-iommu: Speed up processing of the identity_mapping function intel-iommu: Check for identity mapping candidate using system dma mask intel-iommu: Only unlink device domains from iommu intel-iommu: Enable super page (2MiB, 1GiB, etc.) support intel-iommu: Flush unmaps at domain_exit intel-iommu: Remove obsolete comment from detect_intel_iommu intel-iommu: fix VT-d PMR disable for TXT on S3 resume
2011-06-01intel-iommu: Enable super page (2MiB, 1GiB, etc.) supportYouquan Song
There are no externally-visible changes with this. In the loop in the internal __domain_mapping() function, we simply detect if we are mapping: - size >= 2MiB, and - virtual address aligned to 2MiB, and - physical address aligned to 2MiB, and - on hardware that supports superpages. (and likewise for larger superpages). We automatically use a superpage for such mappings. We never have to worry about *breaking* superpages, since we trust that we will always *unmap* the same range that was mapped. So all we need to do is ensure that dma_pte_clear_range() will also cope with superpages. Adjust pfn_to_dma_pte() to take a superpage 'level' as an argument, so it can return a PTE at the appropriate level rather than always extending the page tables all the way down to level 1. Again, this is simplified by the fact that we should never encounter existing small pages when we're creating a mapping; any old mapping that used the same virtual range will have been entirely removed and its obsolete page tables freed. Provide an 'intel_iommu=sp_off' argument on the command line as a chicken bit. Not that it should ever be required. == The original commit seen in the iommu-2.6.git was Youquan's implementation (and completion) of my own half-baked code which I'd typed into an email. Followed by half a dozen subsequent 'fixes'. I've taken the unusual step of rewriting history and collapsing the original commits in order to keep the main history simpler, and make life easier for the people who are going to have to backport this to older kernels. And also so I can give it a more coherent commit comment which (hopefully) gives a better explanation of what's going on. The original sequence of commits leading to identical code was: Youquan Song (3): intel-iommu: super page support intel-iommu: Fix superpage alignment calculation error intel-iommu: Fix superpage level calculation error in dma_pfn_level_pte() David Woodhouse (4): intel-iommu: Precalculate superpage support for dmar_domain intel-iommu: Fix hardware_largepage_caps() intel-iommu: Fix inappropriate use of superpages in __domain_mapping() intel-iommu: Fix phys_pfn in __domain_mapping for sglist pages Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-05-30lguest: remove support for VIRTIO_F_NOTIFY_ON_EMPTY.Rusty Russell
No virtio device does this any more, so no need to clutter lguest with it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-05-30lguest: fix up compilation after moveRusty Russell
ed16648eb5b86917f0b90bdcdbc857202da72f90 "Move kvm, uml, and lguest subdirectories" broke the lguest example launcher. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-05-29Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (43 commits) acer-wmi: support integer return type from WMI methods msi-laptop: fix section mismatch in reference from the function load_scm_model_init acer-wmi: support to set communication device state by new wmid method acer-wmi: allow 64-bits return buffer from WMI methods acer-wmi: check the existence of internal 3G device when set capability platform/x86:delete two unused variables support wlan hotkey on Acer Travelmate 5735Z platform-x86: intel_mid_thermal: Fix memory leak platform/x86: Fix Makefile for intel_mid_powerbtn platform/x86: Simplify intel_mid_powerbtn acer-wmi: Delete out-of-date documentation acerhdf: Clean up includes acerhdf: Drop pointless dependency on THERMAL_HWMON acer-wmi: Update MAINTAINERS wmi: Orphan ACPI-WMI driver tc1100-wmi: Orphan driver acer-wmi: does not allow negative number set to initial device state platform/oaktrail: ACPI EC Extra driver for Oaktrail thinkpad_acpi: Convert printks to pr_<level> thinkpad_acpi: Correct !CONFIG_THINKPAD_ACPI_VIDEO warning ...
2011-05-29Merge branch 'x86-platform-next' into x86-platformMatthew Garrett
2011-05-29Merge branch 'release' of ↵Linus Torvalds
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: ACPI EC: remove redundant code ACPI: Add D3 cold state ACPI: processor: fix processor_physically_present in UP kernel ACPI: Split out custom_method functionality into an own driver ACPI: Cleanup custom_method debug stuff ACPI EC: enable MSI workaround for Quanta laptops ACPICA: Update to version 20110413 ACPICA: Execute an orphan _REG method under the EC device ACPICA: Move ACPI_NUM_PREDEFINED_REGIONS to a more appropriate place ACPICA: Update internal address SpaceID for DataTable regions ACPICA: Add more methods eligible for NULL package element removal ACPICA: Split all internal Global Lock functions to new file - evglock ACPI: EC: add another DMI check for ASUS hardware ACPI EC: remove dead code ACPICA: Fix code divergence of global lock handling ACPICA: Use acpi_os_create_lock interface ACPI: osl, add acpi_os_create_lock interface ACPI:Fix goto flows in thermal-sys
2011-05-29Merge branch 'idle-release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 * 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline param x86 idle: deprecate "no-hlt" cmdline param x86 idle APM: deprecate CONFIG_APM_CPU_IDLE x86 idle floppy: deprecate disable_hlt() x86 idle: EXPORT_SYMBOL(default_idle, pm_idle) only when APM demands it x86 idle: clarify AMD erratum 400 workaround idle governor: Avoid lock acquisition to read pm_qos before entering idle cpuidle: menu: fixed wrapping timers at 4.294 seconds
2011-05-29x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline paramLen Brown
mwait_idle() is a C1-only idle loop intended to be more efficient than HLT on SMP hardware that supports it. But mwait_idle() has been replaced by the more general mwait_idle_with_hints(), which handles both C1 and deeper C-states. ACPI uses only mwait_idle_with_hints(), and never uses mwait_idle(). Deprecate mwait_idle() and the "idle=mwait" cmdline param to simplify the x86 idle code. After this change, kernels configured with (!CONFIG_ACPI=n && !CONFIG_INTEL_IDLE=n) when run on hardware that support MWAIT will simply use HLT. If MWAIT is desired on those systems, cpuidle and the cpuidle drivers above can be used. cc: x86@kernel.org cc: stable@kernel.org # .39.x Signed-off-by: Len Brown <len.brown@intel.com>
2011-05-29x86 idle: deprecate "no-hlt" cmdline paramLen Brown
We'd rather that modern machines not check if HLT works on every entry into idle, for the benefit of machines that had marginal electricals 15-years ago. If those machines are still running the upstream kernel, they can use "idle=poll". The only difference will be that they'll now invoke HLT in machine_hlt(). cc: x86@kernel.org # .39.x Signed-off-by: Len Brown <len.brown@intel.com>
2011-05-29x86 idle APM: deprecate CONFIG_APM_CPU_IDLELen Brown
We don't want to export the pm_idle function pointer to modules. Currently CONFIG_APM_CPU_IDLE w/ CONFIG_APM_MODULE forces us to. CONFIG_APM_CPU_IDLE is of dubious value, it runs only on 32-bit uniprocessor laptops that are over 10 years old. It calls into the BIOS during idle, and is known to cause a number of machines to fail. Removing CONFIG_APM_CPU_IDLE and will allow us to stop exporting pm_idle. Any systems that were calling into the APM BIOS at run-time will simply use HLT instead. cc: x86@kernel.org cc: Jiri Kosina <jkosina@suse.cz> cc: stable@kernel.org # .39.x Signed-off-by: Len Brown <len.brown@intel.com>
2011-05-29x86 idle floppy: deprecate disable_hlt()Len Brown
Plan to remove floppy_disable_hlt in 2012, an ancient workaround with comments that it should be removed. This allows us to remove clutter and a run-time branch from the idle code. WARN_ONCE() on invocation until it is removed. cc: x86@kernel.org cc: stable@kernel.org # .39.x Signed-off-by: Len Brown <len.brown@intel.com>
2011-05-29ACPI: Split out custom_method functionality into an own driverThomas Renninger
With /sys/kernel/debug/acpi/custom_method root can write to arbitrary memory and increase his priveleges, even if these are restricted. -> Make this an own debug .config option and warn about the security issue in the config description. -> Still keep acpi/debugfs.c which now only creates an empty /sys/kernel/debug/acpi directory. There might be other users of it later. Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: rui.zhang@intel.com Signed-off-by: Len Brown <len.brown@intel.com>
2011-05-28Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (36 commits) Cache xattr security drop check for write v2 fs: block_page_mkwrite should wait for writeback to finish mm: Wait for writeback when grabbing pages to begin a write configfs: remove unnecessary dentry_unhash on rmdir, dir rename fat: remove unnecessary dentry_unhash on rmdir, dir rename hpfs: remove unnecessary dentry_unhash on rmdir, dir rename minix: remove unnecessary dentry_unhash on rmdir, dir rename fuse: remove unnecessary dentry_unhash on rmdir, dir rename coda: remove unnecessary dentry_unhash on rmdir, dir rename afs: remove unnecessary dentry_unhash on rmdir, dir rename affs: remove unnecessary dentry_unhash on rmdir, dir rename 9p: remove unnecessary dentry_unhash on rmdir, dir rename ncpfs: fix rename over directory with dangling references ncpfs: document dentry_unhash usage ecryptfs: remove unnecessary dentry_unhash on rmdir, dir rename hostfs: remove unnecessary dentry_unhash on rmdir, dir rename hfsplus: remove unnecessary dentry_unhash on rmdir, dir rename hfs: remove unnecessary dentry_unhash on rmdir, dir rename omfs: remove unnecessary dentry_unhash on rmdir, dir rneame udf: remove unnecessary dentry_unhash from rmdir, dir rename ...
2011-05-28Merge branch 'core-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: rcu: Start RCU kthreads in TASK_INTERRUPTIBLE state rcu: Remove waitqueue usage for cpu, node, and boost kthreads rcu: Avoid acquiring rcu_node locks in timer functions atomic: Add atomic_or() Documentation: Add statistics about nested locks rcu: Decrease memory-barrier usage based on semi-formal proof rcu: Make rcu_enter_nohz() pay attention to nesting rcu: Don't do reschedule unless in irq rcu: Remove old memory barriers from rcu_process_callbacks() rcu: Add memory barriers rcu: Fix unpaired rcu_irq_enter() from locking selftests
2011-05-28Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (33 commits) x86: poll waiting for I/OAT DMA channel status maintainers: add dma engine tree details dmaengine: add TODO items for future work on dma drivers dmaengine: Add API documentation for slave dma usage dmaengine/dw_dmac: Update maintainer-ship dmaengine: move link order dmaengine/dw_dmac: implement pause and resume in dwc_control dmaengine/dw_dmac: Replace spin_lock* with irqsave variants and enable submission from callback dmaengine/dw_dmac: Divide one sg to many desc, if sg len is greater than DWC_MAX_COUNT dmaengine/dw_dmac: set residue as total len in dwc_tx_status if status is !DMA_SUCCESS dmaengine/dw_dmac: don't call callback routine in case dmaengine_terminate_all() is called dmaengine: at_hdmac: pause: no need to wait for FIFO empty pch_dma: modify pci device table definition pch_dma: Support new device ML7223 IOH pch_dma: Support I2S for ML7213 IOH pch_dma: Fix DMA setting issue pch_dma: modify for checkpatch pch_dma: fix dma direction issue for ML7213 IOH video-in dmaengine: at_hdmac: use descriptor chaining help function dmaengine: at_hdmac: implement pause and resume in atc_control ... Fix up trivial conflict in drivers/dma/dw_dmac.c
2011-05-28Merge branch 'rcu/urgent' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/urgent
2011-05-28Documentation: Add statistics about nested locksJuri Lelli
Explain what the trailing "/1" on some lock class names of lock_stat output means. Reviewed-by: Yong Zhang <yong.zhang0@gmail.com> Signed-off-by: Juri Lelli <juri.lelli@gmail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/4DD4F6C1.5090701@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-05-28Merge 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
2011-05-28Merge 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 ...
2011-05-28Merge 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 branches 'devel', 'devel-stable' and 'fixes' into for-linusRussell King
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