1. 10 Sep, 2013 5 commits
  2. 09 Sep, 2013 27 commits
    • Linus Torvalds's avatar
      Merge tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine · 26b0332e
      Linus Torvalds authored
      Pull dmaengine update from Dan Williams:
       "Collection of random updates to the core and some end-driver fixups
        for ioatdma and mv_xor:
         - NUMA aware channel allocation
         - Cleanup dmatest debugfs interface
         - ioat: make raid-support Atom only
         - mv_xor: big endian
      
        Aside from the top three commits these have all had some soak time in
        -next.  The top commit fixes a recent build breakage.
      
        It has been a long while since my last pull request, hopefully it does
        not show.  Thanks to Vinod for keeping an eye on drivers/dma/ this
        past year"
      
      * tag 'dmaengine-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
        dmaengine: dma_sync_wait and dma_find_channel undefined
        MAINTAINERS: update email for Dan Williams
        dma: mv_xor: Fix incorrect error path
        ioatdma: silence GCC warnings
        dmaengine: make dma_channel_rebalance() NUMA aware
        dmaengine: make dma_submit_error() return an error code
        ioatdma: disable RAID on non-Atom platforms and reenable unaligned copies
        mv_xor: support big endian systems using descriptor swap feature
        mv_xor: use {readl, writel}_relaxed instead of __raw_{readl, writel}
        dmatest: print message on debug level in case of no error
        dmatest: remove IS_ERR_OR_NULL checks of debugfs calls
        dmatest: make module parameters writable
      26b0332e
    • Jon Mason's avatar
      dmaengine: dma_sync_wait and dma_find_channel undefined · 4a43f394
      Jon Mason authored
      
      
      dma_sync_wait and dma_find_channel are declared regardless of whether
      CONFIG_DMA_ENGINE is enabled, but calling the function without
      CONFIG_DMA_ENGINE enabled results "undefined reference" errors.
      
      To get around this, declare dma_sync_wait and dma_find_channel as inline
      functions if CONFIG_DMA_ENGINE is undefined.
      Signed-off-by: default avatarJon Mason <jon.mason@intel.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      4a43f394
    • Linus Torvalds's avatar
      Merge tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 64041417
      Linus Torvalds authored
      Pull ARM SoC late changes from Kevin Hilman:
       "These are changes that arrived a little late before the merge window,
        or had dependencies on previous branches.
      
        Highlights:
         - ux500: misc.  cleanup, fixup I2C devices
         - exynos: DT updates for RTC; PM updates
         - at91: DT updates for NAND; new platforms added to generic defconfig
         - sunxi: DT updates: cubieboard2, pinctrl driver, gated clocks
         - highbank: LPAE fixes, select necessary ARM errata
         - omap: PM fixes and improvements; OMAP5 mailbox support
         - omap: basic support for new DRA7xx SoCs"
      
      * tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
        ARM: dts: vexpress: Add CCI node to TC2 device-tree
        ARM: EXYNOS: Skip C1 cpuidle state for exynos5440
        ARM: EXYNOS: always enable PM domains support for EXYNOS4X12
        ARM: highbank: clean-up some unused includes
        ARM: sun7i: Enable the A20 clocks in the DTSI
        ARM: sun6i: Enable clock support in the DTSI
        ARM: sun5i: dt: Use the A10s gates in the DTSI
        ARM: at91: at91_dt_defconfig: enable rm9200 support
        ARM: dts: add ADC device tree node for exynos5420/5250
        ARM: dts: Add RTC DT node to Exynos5420 SoC
        ARM: dts: Update the "status" property of RTC DT node for Exynos5250 SoC
        ARM: dts: Fix the RTC DT node name for Exynos5250
        irqchip: mmp: avoid to include irqs head file
        ARM: mmp: avoid to include head file in mach-mmp
        irqchip: mmp: support irqchip
        irqchip: move mmp irq driver
        ARM: OMAP: AM33xx: clock: Add RNG clock data
        ARM: OMAP: TI81XX: add always-on powerdomain for TI81XX
        ARM: OMAP4: clock: Lock PLLs in the right sequence
        ARM: OMAP: AM33XX: hwmod: Add hwmod data for debugSS
        ...
      64041417
    • Linus Torvalds's avatar
      Merge tag 'renesas-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · fa91515c
      Linus Torvalds authored
      Pull ARM Renesas SoC cleanup, refactoring and more SMP support from Kevin Hilman:
       "Lots of cleanup and refactoring and some SMP additions for Renesas
        platforms.  Due to some inter-dependencies with other arm-soc
        branches, this Renesas stuff was separated out for sending after the
        other branches were merged.
      
        Highlights:
         - remove unused board support and cleanup of unused headers
         - refactoring of init and device registration
         - simplify IRQ initialization"
      
      * tag 'renesas-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (68 commits)
        ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs
        ARM: shmobile: Introduce per-CPU SMP boot / sleep code
        ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779
        ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0
        ARM: shmobile: Add shared SCU CPU Hotplug code
        ARM: shmobile: Use shared SCU SMP boot code on emev2
        ARM: shmobile: Use shared SCU SMP boot code on r8a7779
        ARM: shmobile: Use shared SCU SMP boot code on sh73a0
        ARM: shmobile: Introduce shared SCU SMP boot code
        ARM: shmobile: sh73a0: Remove global GPIO_NR definition
        ARM: shmobile: kzm9d: remove nfsroot settings from bootargs
        ARM: shmobile: armadillo800eva: remove nfsroot settings from bootargs
        ARM: shmobile: r8a7779: move r8a7779_init_irq_xxx() to setup
        ARM: shmobile: r8a7740: move r8a7740_init_irq_of() to setup
        ARM: shmobile: bockw: add missing __initdata
        ARM: shmobile: r8a7790: add missing __initdata
        ARM: shmobile: r8a7779: add missing __initdata
        ARM: shmobile: Remove unused shmobile_init_time()
        ARM: shmobile: Use clocksource_of_init() on r8a7790
        ARM: shmobile: Use default ->init_time() on KZM9G DT ref
        ...
      fa91515c
    • Linus Torvalds's avatar
      Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · a35c6322
      Linus Torvalds authored
      Pull ARM SoC driver update from Kevin Hilman:
       "This contains the ARM SoC related driver updates for v3.12.  The only
        thing this cycle are core PM updates and CPUidle support for ARM's TC2
        big.LITTLE development platform"
      
      * tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        cpuidle: big.LITTLE: vexpress-TC2 CPU idle driver
        ARM: vexpress: tc2: disable GIC CPU IF in tc2_pm_suspend
        drivers: irq-chip: irq-gic: introduce gic_cpu_if_down()
      a35c6322
    • Linus Torvalds's avatar
      Merge tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux · bef4a0ab
      Linus Torvalds authored
      Pull clock framework changes from Michael Turquette:
       "The common clk framework changes for 3.12 are dominated by clock
        driver patches, both new drivers and fixes to existing.  A high
        percentage of these are for Samsung platforms like Exynos.  Core
        framework fixes and some new features like automagical clock
        re-parenting round out the patches"
      
      * tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux: (102 commits)
        clk: only call get_parent if there is one
        clk: samsung: exynos5250: Simplify registration of PLL rate tables
        clk: samsung: exynos4: Register PLL rate tables for Exynos4x12
        clk: samsung: exynos4: Register PLL rate tables for Exynos4210
        clk: samsung: exynos4: Reorder registration of mout_vpllsrc
        clk: samsung: pll: Add support for rate configuration of PLL46xx
        clk: samsung: pll: Use new registration method for PLL46xx
        clk: samsung: pll: Add support for rate configuration of PLL45xx
        clk: samsung: pll: Use new registration method for PLL45xx
        clk: samsung: exynos4: Rename exynos4_plls to exynos4x12_plls
        clk: samsung: exynos4: Remove checks for DT node
        clk: samsung: exynos4: Remove unused static clkdev aliases
        clk: samsung: Modify _get_rate() helper to use __clk_lookup()
        clk: samsung: exynos4: Use separate aliases for cpufreq related clocks
        clocksource: samsung_pwm_timer: Get clock from device tree
        ARM: dts: exynos4: Specify PWM clocks in PWM node
        pwm: samsung: Update DT bindings documentation to cover clocks
        clk: Move symbol export to proper location
        clk: fix new_parent dereference before null check
        clk: wm831x: Initialise wm831x pointer on init
        ...
      bef4a0ab
    • Linus Torvalds's avatar
      Merge tag 'trace-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 7eb69529
      Linus Torvalds authored
      Pull tracing updates from Steven Rostedt:
       "Not much changes for the 3.12 merge window.  The major tracing changes
        are still in flux, and will have to wait for 3.13.
      
        The changes for 3.12 are mostly clean ups and minor fixes.
      
        H Peter Anvin added a check to x86_32 static function tracing that
        helps a small segment of the kernel community.
      
        Oleg Nesterov had a few changes from 3.11, but were mostly clean ups
        and not worth pushing in the -rc time frame.
      
        Li Zefan had small clean up with annotating a raw_init with __init.
      
        I fixed a slight race in updating function callbacks, but the race is
        so small and the bug that happens when it occurs is so minor it's not
        even worth pushing to stable.
      
        The only real enhancement is from Alexander Z Lam that made the
        tracing_cpumask work for trace buffer instances, instead of them all
        sharing a global cpumask"
      
      * tag 'trace-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        ftrace/rcu: Do not trace debug_lockdep_rcu_enabled()
        x86-32, ftrace: Fix static ftrace when early microcode is enabled
        ftrace: Fix a slight race in modifying what function callback gets traced
        tracing: Make tracing_cpumask available for all instances
        tracing: Kill the !CONFIG_MODULES code in trace_events.c
        tracing: Don't pass file_operations array to event_create_dir()
        tracing: Kill trace_create_file_ops() and friends
        tracing/syscalls: Annotate raw_init function with __init
      7eb69529
    • Alex Elder's avatar
      clk: only call get_parent if there is one · 12d29886
      Alex Elder authored
      
      
      In __clk_init(), after a clock is mostly initialized, a scan is done
      of the orphan clocks to see if the clock being registered is the
      parent of any of them.
      
      This code assumes that any clock that provides a get_parent method
      actually has at least one parent, and that's not a valid assumption.
      
      As a result, an orphan clock with no parent can return *something*
      as the parent index, and that value is blindly used to dereference
      the orphan's parent_names[] array (which will be ZERO_SIZE_PTR or
      NULL).
      
      Fix this by ensuring get_parent is only called for orphans with at
      least one parent.
      Signed-off-by: default avatarAlex Elder <elder@linaro.org>
      Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
      12d29886
    • Al Viro's avatar
      split read_seqretry_or_unlock(), convert d_walk() to resulting primitives · 48f5ec21
      Al Viro authored
      
      
      Separate "check if we need to retry" from "unlock if we are done and
      had seq_writelock"; that allows to use these guys in d_walk(), where
      we need to recheck every time we ascend back to parent, but do *not*
      want to unlock until the very end.  Lift rcu_read_lock/rcu_read_unlock
      out into callers.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      48f5ec21
    • Linus Torvalds's avatar
      Merge tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs · 300893b0
      Linus Torvalds authored
      Pull xfs updates from Ben Myers:
       "For 3.12-rc1 there are a number of bugfixes in addition to work to
        ease usage of shared code between libxfs and the kernel, the rest of
        the work to enable project and group quotas to be used simultaneously,
        performance optimisations in the log and the CIL, directory entry file
        type support, fixes for log space reservations, some spelling/grammar
        cleanups, and the addition of user namespace support.
      
         - introduce readahead to log recovery
         - add directory entry file type support
         - fix a number of spelling errors in comments
         - introduce new Q_XGETQSTATV quotactl for project quotas
         - add USER_NS support
         - log space reservation rework
         - CIL optimisations
        - kernel/userspace libxfs rework"
      
      * tag 'xfs-for-linus-v3.12-rc1' of git://oss.sgi.com/xfs/xfs: (112 commits)
        xfs: XFS_MOUNT_QUOTA_ALL needed by userspace
        xfs: dtype changed xfs_dir2_sfe_put_ino to xfs_dir3_sfe_put_ino
        Fix wrong flag ASSERT in xfs_attr_shortform_getvalue
        xfs: finish removing IOP_* macros.
        xfs: inode log reservations are too small
        xfs: check correct status variable for xfs_inobt_get_rec() call
        xfs: inode buffers may not be valid during recovery readahead
        xfs: check LSN ordering for v5 superblocks during recovery
        xfs: btree block LSN escaping to disk uninitialised
        XFS: Assertion failed: first <= last && last < BBTOB(bp->b_length), file: fs/xfs/xfs_trans_buf.c, line: 568
        xfs: fix bad dquot buffer size in log recovery readahead
        xfs: don't account buffer cancellation during log recovery readahead
        xfs: check for underflow in xfs_iformat_fork()
        xfs: xfs_dir3_sfe_put_ino can be static
        xfs: introduce object readahead to log recovery
        xfs: Simplify xfs_ail_min() with list_first_entry_or_null()
        xfs: Register hotcpu notifier after initialization
        xfs: add xfs sb v4 support for dirent filetype field
        xfs: Add write support for dirent filetype field
        xfs: Add read-only support for dirent filetype field
        ...
      300893b0
    • Olof Johansson's avatar
      direct-io: Use return from cmpxchg to decide of assignment happened · 45150c43
      Olof Johansson authored
      
      
      Not using the return value can in the generic case be racy, so it's
      in general good practice to check the return value instead.
      
      This also resolved the warning caused on ARM and other architectures:
      
        fs/direct-io.c: In function 'sb_init_dio_done_wq':
        fs/direct-io.c:557:2: warning: value computed is not used [-Wunused-value]
      Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
      Reviewed-by: default avatarJan Kara <jack@suse.cz>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: H Peter Anvin <hpa@zytor.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      45150c43
    • Waiman Long's avatar
      dcache: Translating dentry into pathname without taking rename_lock · 232d2d60
      Waiman Long authored
      
      
      When running the AIM7's short workload, Linus' lockref patch eliminated
      most of the spinlock contention. However, there were still some left:
      
           8.46%     reaim  [kernel.kallsyms]     [k] _raw_spin_lock
                       |--42.21%-- d_path
                       |          proc_pid_readlink
                       |          SyS_readlinkat
                       |          SyS_readlink
                       |          system_call
                       |          __GI___readlink
                       |
                       |--40.97%-- sys_getcwd
                       |          system_call
                       |          __getcwd
      
      The big one here is the rename_lock (seqlock) contention in d_path()
      and the getcwd system call. This patch will eliminate the need to take
      the rename_lock while translating dentries into the full pathnames.
      
      The need to take the rename_lock is to make sure that no rename
      operation can be ongoing while the translation is in progress. However,
      only one thread can take the rename_lock thus blocking all the other
      threads that need it even though the translation process won't make
      any change to the dentries.
      
      This patch will replace the writer's write_seqlock/write_sequnlock
      sequence of the rename_lock of the callers of the prepend_path() and
      __dentry_path() functions with the reader's read_seqbegin/read_seqretry
      sequence within these 2 functions. As a result, the code will have to
      retry if one or more rename operations had been performed. In addition,
      RCU read lock will be taken during the translation process to make sure
      that no dentries will go away. To prevent live-lock from happening,
      the code will switch back to take the rename_lock if read_seqretry()
      fails for three times.
      
      To further reduce spinlock contention, this patch does not take the
      dentry's d_lock when copying the filename from the dentries. Instead,
      it treats the name pointer and length as unreliable and just copy
      the string byte-by-byte over until it hits a null byte or the end of
      string as specified by the length. This should avoid stepping into
      invalid memory address. The error cases are left to be handled by
      the sequence number check.
      
      The following code re-factoring are also made:
      1. Move prepend('/') into prepend_name() to remove one conditional
         check.
      2. Move the global root check in prepend_path() back to the top of
         the while loop.
      
      With this patch, the _raw_spin_lock will now account for only 1.2%
      of the total CPU cycles for the short workload. This patch also has
      the effect of reducing the effect of running perf on its profile
      since the perf command itself can be a heavy user of the d_path()
      function depending on the complexity of the workload.
      
      When taking the perf profile of the high-systime workload, the amount
      of spinlock contention contributed by running perf without this patch
      was about 16%. With this patch, the spinlock contention caused by
      the running of perf will go away and we will have a more accurate
      perf profile.
      Signed-off-by: default avatarWaiman Long <Waiman.Long@hp.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      232d2d60
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd · ef9a61be
      Linus Torvalds authored
      Pull mtd updates from David Woodhouse:
       - factor out common code from MTD tests
       - nand-gpio cleanup and portability to non-ARM
       - m25p80 support for 4-byte addressing chips, other new chips
       - pxa3xx cleanup and support for new platforms
       - remove obsolete alauda, octagon-5066 drivers
       - erase/write support for bcm47xxsflash
       - improve detection of ECC requirements for NAND, controller setup
       - NFC acceleration support for atmel-nand, read/write via SRAM
       - etc
      
      * tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd: (184 commits)
        mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
        mtd: ofpart: use for_each_child_of_node() macro
        mtd: mtdswap: replace strict_strtoul() with kstrtoul()
        mtd cs553x_nand: use kzalloc() instead of memset
        mtd: atmel_nand: fix error return code in atmel_nand_probe()
        mtd: bcm47xxsflash: writing support
        mtd: bcm47xxsflash: implement erasing support
        mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exit
        mtd: bcm47xxsflash: convert kzalloc to avoid invalid access
        mtd: remove alauda driver
        mtd: nand: mxc_nand: mark 'const' properly
        mtd: maps: cfi_flagadm: add missing __iomem annotation
        mtd: spear_smi: add missing __iomem annotation
        mtd: r852: Staticize local symbols
        mtd: nandsim: Staticize local symbols
        mtd: impa7: add missing __iomem annotation
        mtd: sm_ftl: Staticize local symbols
        mtd: m25p80: add support for mr25h10
        mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable
        mtd: m25p80: Pass flags through CAT25_INFO macro
        ...
      ef9a61be
    • Linus Torvalds's avatar
      Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394 · b5f0998c
      Linus Torvalds authored
      Pull firewire updates from Stefan Richter:
      
       - Fix a regression since 3.2 inclusive: The subsystem workqueue
         deadlocked between transaction completion handling and bus reset
         handling if the worker pool could not be increased in time.
      
       - janitorial updates
      
      * tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
        firewire: ohci: Fix deadlock at bus reset
        firewire: ohci: Change module_pci_driver to module_init/module_exit
        firewire: ohci: beautify some macro definitions
        firewire: ohci: change confusing name of a struct member
        firewire: core: typecast from gfp_t to bool more safely
        firewire: WQ_NON_REENTRANT is meaningless and going away
      b5f0998c
    • Dan Williams's avatar
      MAINTAINERS: update email for Dan Williams · ab5f8c6e
      Dan Williams authored
      
      
      Returned to intel.com
      
      Cc: Vinod Koul <vinod.koul@intel.com>
      Cc: Linus Walleij <linus.walleij@linaro.org>
      Cc: Jon Mason <jon.mason@intel.com>
      Cc: Dave Jiang <dave.jiang@intel.com>
      Cc: Neil Brown <neilb@suse.de>
      Cc: Shaohua Li <shli@kernel.org>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      ab5f8c6e
    • Linus Torvalds's avatar
      Merge branch 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping · 64c35386
      Linus Torvalds authored
      Pull DMA mapping update from Marek Szyprowski:
       "This contains an addition of Device Tree support for reserved memory
        regions (Contiguous Memory Allocator is one of the drivers for it) and
        changes required by the KVM extensions for PowerPC architectue"
      
      * 'for-v3.12' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
        ARM: init: add support for reserved memory defined by device tree
        drivers: of: add initialization code for dma reserved memory
        drivers: of: add function to scan fdt nodes given by path
        drivers: dma-contiguous: clean source code and prepare for device tree
      64c35386
    • Sachin Kamat's avatar
      dma: mv_xor: Fix incorrect error path · a577659f
      Sachin Kamat authored
      
      
      Return directly if memory allocation fails. There is no need
      of dma_free_coherent().
      Signed-off-by: default avatarSachin Kamat <sachin.kamat@linaro.org>
      Cc: Saeed Bishara <saeed@marvell.com>
      Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      a577659f
    • Linus Torvalds's avatar
      Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · d8cacd3a
      Linus Torvalds authored
      Pull virtio update from Rusty Russell:
       "More console fixes; these are the theoretical ones which didn't get
        CC:stable.  But for that reason, I did a merge with master partway
        through to avoid an unnecessary conflict.
      
        Also: a fun lguest bug turns out if you don't clear the TF flag when
        trapping Bad Things happen to the guest kernel as the stack
        overflows..."
      
      * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
        virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM
        lguest: fix GPF in guest when using gdb.
        lguest: fix guest kernel stack overflow when TF bit set.
        lguest: fix BUG_ON() in invalid guest page table.
        virtio: console: prevent use-after-free of port name in port unplug
        virtio: console: cleanup an error message
        virtio: console: fix locking around send_sigio_to_port()
        virtio: console: add locking in port unplug path
        virtio: console: add locks around buffer removal in port unplug path
        tools/lguest: offer VIRTIO_F_ANY_LAYOUT for net device.
        virtio tools: add .gitignore
        lguest: Point to the right directory for the lguest launcher
      d8cacd3a
    • Linus Torvalds's avatar
      Merge tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio · d75671e3
      Linus Torvalds authored
      Pull VFIO update from Alex Williamson:
       "VFIO updates include safer default file flags for VFIO device fds, an
        external user interface exported to allow other modules to hold
        references to VFIO groups, a fix to test for extended config space on
        PCIe and PCI-x, and new hot reset interfaces for PCI devices which
        allows the user to do PCI bus/slot resets when all of the devices
        affected by the reset are owned by the user.
      
        For this last feature, the PCI bus reset interface, I depend on
        changes already merged from Bjorn's PCI pull request.  I therefore
        merged my tree up to commit cb3e4330, which I think was the correct
        action, but as Stephen Rothwell noted, I failed to provide a commit
        message indicating why the merge was required.  Sorry for that.
        Thanks, Alex"
      
      * tag 'vfio-v3.12-rc0' of git://github.com/awilliam/linux-vfio:
        vfio: fix documentation
        vfio-pci: PCI hot reset interface
        vfio-pci: Test for extended config space
        vfio-pci: Use fdget() rather than eventfd_fget()
        vfio: Add O_CLOEXEC flag to vfio device fd
        vfio: use get_unused_fd_flags(0) instead of get_unused_fd()
        vfio: add external user support
      d75671e3
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · bf97293e
      Linus Torvalds authored
      Pull NFS client updates from Trond Myklebust:
       "Highlights include:
      
         - Fix NFSv4 recovery so that it doesn't recover lost locks in cases
           such as lease loss due to a network partition, where doing so may
           result in data corruption.  Add a kernel parameter to control
           choice of legacy behaviour or not.
         - Performance improvements when 2 processes are writing to the same
           file.
         - Flush data to disk when an RPCSEC_GSS session timeout is imminent.
         - Implement NFSv4.1 SP4_MACH_CRED state protection to prevent other
           NFS clients from being able to manipulate our lease and file
           locking state.
         - Allow sharing of RPCSEC_GSS caches between different rpc clients.
         - Fix the broken NFSv4 security auto-negotiation between client and
           server.
         - Fix rmdir() to wait for outstanding sillyrename unlinks to complete
         - Add a tracepoint framework for debugging NFSv4 state recovery
           issues.
         - Add tracing to the generic NFS layer.
         - Add tracing for the SUNRPC socket connection state.
         - Clean up the rpc_pipefs mount/umount event management.
         - Merge more patches from Chuck in preparation for NFSv4 migration
           support"
      
      * tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (107 commits)
        NFSv4: use mach cred for SECINFO_NO_NAME w/ integrity
        NFS: nfs_compare_super shouldn't check the auth flavour unless 'sec=' was set
        NFSv4: Allow security autonegotiation for submounts
        NFSv4: Disallow security negotiation for lookups when 'sec=' is specified
        NFSv4: Fix security auto-negotiation
        NFS: Clean up nfs_parse_security_flavors()
        NFS: Clean up the auth flavour array mess
        NFSv4.1 Use MDS auth flavor for data server connection
        NFS: Don't check lock owner compatability unless file is locked (part 2)
        NFS: Don't check lock owner compatibility in writes unless file is locked
        nfs4: Map NFS4ERR_WRONG_CRED to EPERM
        nfs4.1: Add SP4_MACH_CRED write and commit support
        nfs4.1: Add SP4_MACH_CRED stateid support
        nfs4.1: Add SP4_MACH_CRED secinfo support
        nfs4.1: Add SP4_MACH_CRED cleanup support
        nfs4.1: Add state protection handler
        nfs4.1: Minimal SP4_MACH_CRED implementation
        SUNRPC: Replace pointer values with task->tk_pid and rpc_clnt->cl_clid
        SUNRPC: Add an identifier for struct rpc_clnt
        SUNRPC: Ensure rpc_task->tk_pid is available for tracepoints
        ...
      bf97293e
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse · 16d70e15
      Linus Torvalds authored
      Pull fuse bugfixes from Miklos Szeredi:
       "Just a bunch of bugfixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
        fuse: use list_for_each_entry() for list traversing
        fuse: readdir: check for slash in names
        fuse: hotfix truncate_pagecache() issue
        fuse: invalidate inode attributes on xattr modification
        fuse: postpone end_page_writeback() in fuse_writepage_locked()
      16d70e15
    • Linus Torvalds's avatar
      Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw · 6c337ad6
      Linus Torvalds authored
      Pull GFS2 updates from Steven Whitehouse:
       "This is possibly the smallest ever set of GFS2 patches for a merge
        window.  Also, most of them are bug fixes this time.
      
        Two of my three patches (moving gfs2_sync_meta and merging the two
        writepage implementations) are clean ups with the third (taking the
        glock ref in examine_bucket) being a fix for a difficult to hit race
        condition.
      
        The removal of an unused memory barrier is a clean up from Bob
        Peterson, and the "spectator" relates to a rarely used mount option.
        Ben Marzinski's patch fixes a corner case where the incorrect inode
        flags were being set, resulting in incorrect behaviour on fsync"
      
      * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
        GFS2: dirty inode correctly in gfs2_write_end
        GFS2: Don't flag consistency error if first mounter is a spectator
        GFS2: Remove unnecessary memory barrier
        GFS2: Merge ordered and writeback writepage
        GFS2: Take glock reference in examine_bucket()
        GFS2: Move gfs2_sync_meta to lops.c
      6c337ad6
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · 6cccc7d3
      Linus Torvalds authored
      Pull ceph updates from Sage Weil:
       "This includes both the first pile of Ceph patches (which I sent to
        torvalds@vger, sigh) and a few new patches that add support for
        fscache for Ceph.  That includes a few fscache core fixes that David
        Howells asked go through the Ceph tree.  (Thanks go to Milosz Tanski
        for putting this feature together)
      
        This first batch of patches (included here) had (has) several
        important RBD bug fixes, hole punch support, several different
        cleanups in the page cache interactions, improvements in the truncate
        code (new truncate mutex to avoid shenanigans with i_mutex), and a
        series of fixes in the synchronous striping read/write code.
      
        On top of that is a random collection of small fixes all across the
        tree (error code checks and error path cleanup, obsolete wq flags,
        etc)"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (43 commits)
        ceph: use d_invalidate() to invalidate aliases
        ceph: remove ceph_lookup_inode()
        ceph: trivial buildbot warnings fix
        ceph: Do not do invalidate if the filesystem is mounted nofsc
        ceph: page still marked private_2
        ceph: ceph_readpage_to_fscache didn't check if marked
        ceph: clean PgPrivate2 on returning from readpages
        ceph: use fscache as a local presisent cache
        fscache: Netfs function for cleanup post readpages
        FS-Cache: Fix heading in documentation
        CacheFiles: Implement interface to check cache consistency
        FS-Cache: Add interface to check consistency of a cached object
        rbd: fix null dereference in dout
        rbd: fix buffer size for writes to images with snapshots
        libceph: use pg_num_mask instead of pgp_num_mask for pg.seed calc
        rbd: fix I/O error propagation for reads
        ceph: use vfs __set_page_dirty_nobuffers interface instead of doing it inside filesystem
        ceph: allow sync_read/write return partial successed size of read/write.
        ceph: fix bugs about handling short-read for sync read mode.
        ceph: remove useless variable revoked_rdcache
        ...
      6cccc7d3
    • Linus Torvalds's avatar
      Merge tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag · 255ae3fb
      Linus Torvalds authored
      Pull metag architecture changes from James Hogan:
       - Device tree updates for TZ1090 GPIO drivers merged via GPIO tree.
       - Add driver for ImgTec PDC irqchip as found in TZ1090 SoC.
       - Add linux-metag mailing list to MAINTAINERS file.
      
      * tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
        irq-imgpdc: add ImgTec PDC irqchip driver
        MAINTAINERS: add linux-metag mailing list
        metag: tz1090: instantiate gpio-tz1090-pdc
        metag: tz1090: select and instantiate gpio-tz1090
        metag: tz1090: select and instantiate irq-imgpdc
      255ae3fb
    • Linus Torvalds's avatar
      Merge tag 'arc-v3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · 89c5a946
      Linus Torvalds authored
      Pull ARC changes from Vineet Gupta:
      
       - ARC MM changes:
          - preparation for MMUv4 (accomodate new PTE bits, new cmds)
          - Rework the ASID allocation algorithm to remove asid-mm reverse map
       - Boilerplate code consolidation in Exception Handlers
       - Disable FRAME_POINTER for ARC
       - Unaligned Access Emulation for Big-Endian from Noam
       - Bunch of fixes (udelay, missing accessors) from Mischa
      
      * tag 'arc-v3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARC: fix new Section mismatches in build (post __cpuinit cleanup)
        Kconfig.debug: Add FRAME_POINTER anti-dependency for ARC
        ARC: Fix __udelay calculation
        ARC: remove console_verbose() from setup_arch()
        ARC: Add read*_relaxed to asm/io.h
        ARC: Handle un-aligned user space access in BE.
        ARC: [ASID] Track ASID allocation cycles/generations
        ARC: [ASID] activate_mm() == switch_mm()
        ARC: [ASID] get_new_mmu_context() to conditionally allocate new ASID
        ARC: [ASID] Refactor the TLB paranoid debug code
        ARC: [ASID] Remove legacy/unused debug code
        ARC: No need to flush the TLB in early boot
        ARC: MMUv4 preps/3 - Abstract out TLB Insert/Delete
        ARC: MMUv4 preps/2 - Reshuffle PTE bits
        ARC: MMUv4 preps/1 - Fold PTE K/U access flags
        ARC: Code cosmetics (Nothing semantical)
        ARC: Entry Handler tweaks: Optimize away redundant IRQ_DISABLE_SAVE
        ARC: Exception Handlers Code consolidation
        ARC: Add some .gitignore entries
      89c5a946
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu · 833ae40b
      Linus Torvalds authored
      Pull m68knommu fixes from Greg Ungerer:
       "Just a small collection of cleanups and fixes this time, no big
        changes.  The most interresting are to make the m68k and m68knommu
        consistently use CONFIG_IOMAP, clean out some unused board config
        options and flush the cache on signal stack creation"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
        m68k: remove 16 unused boards in Kconfig.machine
        m68k: define 'VM_DATA_DEFAULT_FLAGS' no matter whether has 'NOMMU' or not
        m68knommu: user generic iomap to support ioread*/iowrite*
        m68k/coldfire: flush cache when creating the signal stack frame
        m68knommu: Mark functions only called from setup_arch() __init
      833ae40b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml · 20e029d7
      Linus Torvalds authored
      Pull UML updates from Richard Weinberger:
       "This pile contains mostly fixes and improvements for issues identified
        by Richard W M Jones while adding UML as backend to libguestfs"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
        um: Add irq chip um/mask handlers
        um: prctl: Do not include linux/ptrace.h
        um: Run UML in it's own session.
        um: Cleanup SIGTERM handling
        um: ubd: Introduce submit_request()
        um: ubd: Add REQ_FLUSH suppport
        um: Implement probe_kernel_read()
        um: hostfs: Fix writeback
      20e029d7
  3. 08 Sep, 2013 8 commits
    • Ian Kent's avatar
      autofs4 - fix device ioctl mount lookup · ac838719
      Ian Kent authored
      
      
      When reconnecting to automounts at startup an autofs ioctl is used
      to find the device and inode of existing mounts so they can be used
      to open a file descriptor of possibly covered mounts.
      
      At this time the the caller might not yet "own" the mount so it can
      trigger calling ->d_automount(). This causes automount to hang when
      trying to reconnect to direct or offset mount types.
      
      Consequently kern_path() can't be used but kern_path_mountpoint() can be.
      Signed-off-by: default avatarIan Kent <raven@themaw.net>
      Cc: Jeff Layton <jlayton@redhat.com>
      Cc: Al Viro <viro@ZenIV.linux.org.uk>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ac838719
    • Linus Torvalds's avatar
      vfs: fix dentry RCU to refcounting possibly sleeping dput() · e5c832d5
      Linus Torvalds authored
      
      
      This is the fix that the last two commits indirectly led up to - making
      sure that we don't call dput() in a bad context on the dentries we've
      looked up in RCU mode after the sequence count validation fails.
      
      This basically expands d_rcu_to_refcount() into the callers, and then
      fixes the callers to delay the dput() in the failure case until _after_
      we've dropped all locks and are no longer in an RCU-locked region.
      
      The case of 'complete_walk()' was trivial, since its failure case did
      the unlock_rcu_walk() directly after the call to d_rcu_to_refcount(),
      and as such that is just a pure expansion of the function with a trivial
      movement of the resulting dput() to after 'unlock_rcu_walk()'.
      
      In contrast, the unlazy_walk() case was much more complicated, because
      not only does convert two different dentries from RCU to be reference
      counted, but it used to not call unlock_rcu_walk() at all, and instead
      just returned an error and let the caller clean everything up in
      "terminate_walk()".
      
      Happily, one of the dentries in question (called "parent" inside
      unlazy_walk()) is the dentry of "nd->path", which terminate_walk() wants
      a refcount to anyway for the non-RCU case.
      
      So what the new and improved unlazy_walk() does is to first turn that
      dentry into a refcounted one, and once that is set up, the error cases
      can continue to use the terminate_walk() helper for cleanup, but for the
      non-RCU case.  Which makes it possible to drop out of RCU mode if we
      actually hit the sequence number failure case.
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e5c832d5
    • Aaron Lu's avatar
      virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM · 9e266ece
      Aaron Lu authored
      
      
      The virtio_pci_freeze/restore are defined under CONFIG_PM but is used
      by SET_SYSTEM_SLEEP_PM_OPS macro, which is defined under
      CONFIG_PM_SLEEP. So if CONFIG_PM_SLEEP is not cofigured but
      CONFIG_PM_RUNTIME is, the following warning message appeared:
      
      drivers/virtio/virtio_pci.c:770:12: warning: ‘virtio_pci_freeze’ defined but not used [-Wunused-function]
       static int virtio_pci_freeze(struct device *dev)
                  ^
      drivers/virtio/virtio_pci.c:790:12: warning: ‘virtio_pci_restore’ defined but not used [-Wunused-function]
       static int virtio_pci_restore(struct device *dev)
                  ^
      Fix it by changing CONFIG_PM to CONFIG_PM_SLEEP.
      Signed-off-by: default avatarAaron Lu <aaron.lu@intel.com>
      Reviewed-by: default avatarAmit Shah <amit.shah@redhat.com>
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      9e266ece
    • Al Viro's avatar
      introduce kern_path_mountpoint() · 2d864651
      Al Viro authored
      
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      2d864651
    • Al Viro's avatar
      rename user_path_umountat() to user_path_mountpoint_at() · 197df04c
      Al Viro authored
      
      
      ... and move the extern from linux/namei.h to fs/internal.h,
      along with that of vfs_path_lookup().
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      197df04c
    • Al Viro's avatar
      take unlazy_walk() into umount_lookup_last() · 35759521
      Al Viro authored
      
      
      ... and massage it a bit to reduce nesting
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      35759521
    • Linus Torvalds's avatar
      vfs: use lockred "dead" flag to mark unrecoverably dead dentries · 0d98439e
      Linus Torvalds authored
      This simplifies the RCU to refcounting code in particular.
      
      I was originally intending to leave this for later, but walking through
      all the dput() logic (see previous commit), I realized that the dput()
      "might_sleep()" check was misleadingly weak.  And I removed it as
      misleading, both for performance profiling and for debugging.
      
      However, the might_sleep() debugging case is actually true: the final
      dput() can indeed sleep, if the inode of the dentry that you are
      releasing ends up sleeping at iput time (see dentry_iput()).  So the
      problem with the might_sleep() in dput() wasn't that it wasn't true, it
      was that it wasn't actually testing and triggering on the interesting
      case.
      
      In particular, just about *any* dput() can indeed sleep, if you happen
      to race with another thread deleting the file in question, and you then
      lose the race to the be the last dput() for that file.  But because it's
      a very rare race, the debugging code would never trigger it in practice.
      
      Why is this problematic? The new d_rcu_to_refcount() (see commit
      15570086
      
      : "vfs: reimplement d_rcu_to_refcount() using
      lockref_get_or_lock()") does a dput() for the failure case, and it does
      it under the RCU lock.  So potentially sleeping really is a bug.
      
      But there's no way I'm going to fix this with the previous complicated
      "lockref_get_or_lock()" interface.  And rather than revert to the old
      and crufty nested dentry locking code (which did get this right by
      delaying the reference count updates until they were verified to be
      safe), let's make forward progress.
      
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0d98439e
    • Linus Torvalds's avatar
      vfs: reorganize dput() memory accesses · 8aab6a27
      Linus Torvalds authored
      
      
      This is me being a bit OCD after all the dentry optimization work this
      merge window: profiles end up showing 'dput()' as a rather expensive
      operation, and there were two unrelated bad reasons for that.
      
      The first reason was reading d_lockref.count for debugging purposes,
      which touches the lockref cacheline (for reads) before really need to.
      More importantly, the debugging test in question is _wrong_, and has
      hidden bugs.  It's true that we can only sleep when the count goes down
      to zero, but the test as-is hides the much more subtle bug that happens
      if we race with somebody else deleting the file.
      
      Anyway we _will_ touch that cacheline, but let's do it for a write and
      in the right routine (ie in "lockref_put_or_lock()") which annotates the
      costs better.  So remove the misleading debug code.
      
      The other was an unnecessary access to the cacheline that contains the
      d_lru list, just to check whether we already were on the LRU list or
      not.  This is exactly what we have d_flags for, so that we can avoid
      touching extra cache lines for the common case.  So just add another bit
      for "is this dentry on the LRU".
      
      Finally, mark the tests properly likely/unlikely, so that the common
      fast-paths are dense in the instruction stream.
      
      This makes the profiles look much saner.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8aab6a27