1. 20 Nov, 2013 18 commits
    • Linus Torvalds's avatar
      Merge tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next · af2e2f32
      Linus Torvalds authored
      Pull squashfs updates from Phillip Lougher:
       "These patches optionally improve the multi-threading peformance of
        Squashfs by adding parallel decompression, and direct decompression
        into the page cache, eliminating an intermediate buffer (removing
        memcpy overhead and lock contention)"
      
      * tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next:
        Squashfs: Check stream is not NULL in decompressor_multi.c
        Squashfs: Directly decompress into the page cache for file data
        Squashfs: Restructure squashfs_readpage()
        Squashfs: Generalise paging handling in the decompressors
        Squashfs: add multi-threaded decompression using percpu variable
        squashfs: Enhance parallel I/O
        Squashfs: Refactor decompressor interface and code
      af2e2f32
    • Linus Torvalds's avatar
      Revert "mm: create a separate slab for page->ptl allocation" · 8b2e9b71
      Linus Torvalds authored
      This reverts commit ea1e7ed3.
      
      Al points out that while the commit *does* actually create a separate
      slab for the page->ptl allocation, that slab is never actually used, and
      the code continues to use kmalloc/kfree.
      
      Damien Wyart points out that the original patch did have the conversion
      to use kmem_cache_alloc/free, so it got lost somewhere on its way to me.
      
      Revert the half-arsed attempt that didn't do anything.  If we really do
      want the special slab (remember: this is all relevant just for debug
      builds, so it's not necessarily all that critical) we might as well redo
      the patch fully.
      Reported-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Cc: Kirill A Shutemov <kirill.shutemov@linux.intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8b2e9b71
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · b5898cd0
      Linus Torvalds authored
      Pull vfs bits and pieces from Al Viro:
       "Assorted bits that got missed in the first pull request + fixes for a
        couple of coredump regressions"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        fold try_to_ascend() into the sole remaining caller
        dcache.c: get rid of pointless macros
        take read_seqbegin_or_lock() and friends to seqlock.h
        consolidate simple ->d_delete() instances
        gfs2: endianness misannotations
        dump_emit(): use __kernel_write(), not vfs_write()
        dump_align(): fix the dumb braino
      b5898cd0
    • Al Viro's avatar
      Wrong page freed on preallocate_pmds() failure exit · 2a46eed5
      Al Viro authored
      Note that pmds[i] is simply uninitialized at that point...
      
      Granted, it's very hard to hit (you need split page locks *and*
      kmalloc(sizeof(spinlock_t), GFP_KERNEL) failing), but the code is
      obviously bogus.
      
      Introduced by commit 09ef4939 ("x86: add missed
      pgtable_pmd_page_ctor/dtor calls for preallocated pmds")
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      2a46eed5
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 82023bb7
      Linus Torvalds authored
      Pull more ACPI and power management updates from Rafael Wysocki:
      
       - ACPI-based device hotplug fixes for issues introduced recently and a
         fix for an older error code path bug in the ACPI PCI host bridge
         driver
      
       - Fix for recently broken OMAP cpufreq build from Viresh Kumar
      
       - Fix for a recent hibernation regression related to s2disk
      
       - Fix for a locking-related regression in the ACPI EC driver from
         Puneet Kumar
      
       - System suspend error code path fix related to runtime PM and runtime
         PM documentation update from Ulf Hansson
      
       - cpufreq's conservative governor fix from Xiaoguang Chen
      
       - New processor IDs for intel_idle and turbostat and removal of an
         obsolete Kconfig option from Len Brown
      
       - New device IDs for the ACPI LPSS (Low-Power Subsystem) driver and
         ACPI-based PCI hotplug (ACPIPHP) cleanup from Mika Westerberg
      
       - Removal of several ACPI video DMI blacklist entries that are not
         necessary any more from Aaron Lu
      
       - Rework of the ACPI companion representation in struct device and code
         cleanup related to that change from Rafael J Wysocki, Lan Tianyu and
         Jarkko Nikula
      
       - Fixes for assigning names to ACPI-enumerated I2C and SPI devices from
         Jarkko Nikula
      
      * tag 'pm+acpi-2-3.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (24 commits)
        PCI / hotplug / ACPI: Drop unused acpiphp_debug declaration
        ACPI / scan: Set flags.match_driver in acpi_bus_scan_fixed()
        ACPI / PCI root: Clear driver_data before failing enumeration
        ACPI / hotplug: Fix PCI host bridge hot removal
        ACPI / hotplug: Fix acpi_bus_get_device() return value check
        cpufreq: governor: Remove fossil comment in the cpufreq_governor_dbs()
        ACPI / video: clean up DMI table for initial black screen problem
        ACPI / EC: Ensure lock is acquired before accessing ec struct members
        PM / Hibernate: Do not crash kernel in free_basic_memory_bitmaps()
        ACPI / AC: Remove struct acpi_device pointer from struct acpi_ac
        spi: Use stable dev_name for ACPI enumerated SPI slaves
        i2c: Use stable dev_name for ACPI enumerated I2C slaves
        ACPI: Provide acpi_dev_name accessor for struct acpi_device device name
        ACPI / bind: Use (put|get)_device() on ACPI device objects too
        ACPI: Eliminate the DEVICE_ACPI_HANDLE() macro
        ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node
        cpufreq: OMAP: Fix compilation error 'r & ret undeclared'
        PM / Runtime: Fix error path for prepare
        PM / Runtime: Update documentation around probe|remove|suspend
        cpufreq: conservative: set requested_freq to policy max when it is over policy max
        ...
      82023bb7
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma · e6d69a60
      Linus Torvalds authored
      Pull slave-dmaengine changes from Vinod Koul:
       "This brings for slave dmaengine:
      
         - Change dma notification flag to DMA_COMPLETE from DMA_SUCCESS as
           dmaengine can only transfer and not verify validaty of dma
           transfers
      
         - Bunch of fixes across drivers:
      
            - cppi41 driver fixes from Daniel
      
            - 8 channel freescale dma engine support and updated bindings from
              Hongbo
      
            - msx-dma fixes and cleanup by Markus
      
         - DMAengine updates from Dan:
      
            - Bartlomiej and Dan finalized a rework of the dma address unmap
              implementation.
      
            - In the course of testing 1/ a collection of enhancements to
              dmatest fell out.  Notably basic performance statistics, and
              fixed / enhanced test control through new module parameters
              'run', 'wait', 'noverify', and 'verbose'.  Thanks to Andriy and
              Linus [Walleij] for their review.
      
            - Testing the raid related corner cases of 1/ triggered bugs in
              the recently added 16-source operation support in the ioatdma
              driver.
      
            - Some minor fixes / cleanups to mv_xor and ioatdma"
      
      * 'next' of git://git.infradead.org/users/vkoul/slave-dma: (99 commits)
        dma: mv_xor: Fix mis-usage of mmio 'base' and 'high_base' registers
        dma: mv_xor: Remove unneeded NULL address check
        ioat: fix ioat3_irq_reinit
        ioat: kill msix_single_vector support
        raid6test: add new corner case for ioatdma driver
        ioatdma: clean up sed pool kmem_cache
        ioatdma: fix selection of 16 vs 8 source path
        ioatdma: fix sed pool selection
        ioatdma: Fix bug in selftest after removal of DMA_MEMSET.
        dmatest: verbose mode
        dmatest: convert to dmaengine_unmap_data
        dmatest: add a 'wait' parameter
        dmatest: add basic performance metrics
        dmatest: add support for skipping verification and random data setup
        dmatest: use pseudo random numbers
        dmatest: support xor-only, or pq-only channels in tests
        dmatest: restore ability to start test at module load and init
        dmatest: cleanup redundant "dmatest: " prefixes
        dmatest: replace stored results mechanism, with uniform messages
        Revert "dmatest: append verify result to results"
        ...
      e6d69a60
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 5a1efc6e
      Linus Torvalds authored
      Pull block IO fixes from Jens Axboe:
       "Normally I'd defer my initial for-linus pull request until after the
        merge window, but a race was uncovered in the virtio-blk conversion to
        blk-mq that could cause hangs.  So here's a small collection of fixes
        for you to pull:
      
         - The fix for the virtio-blk IO hang reported by Dave Chinner, from
           Shaohua and myself.
      
         - Add the Insert blktrace event for blk-mq.  This makes 'btt' happy
           when it is doing it's state transition analysis.
      
         - Ensure that blk-mq has disk/partition stats enabled by default,
           instead of making it opt-in.
      
         - A fix for __bio_add_page() and large sector counts"
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        blk-mq: add blktrace insert event trace
        virtio-blk: virtqueue_kick() must be ordered with other virtqueue operations
        blk-mq: ensure that we set REQ_IO_STAT so diskstats work
        bio: fix argument of __bio_add_page() for max_sectors > 0xffff
      5a1efc6e
    • Linus Torvalds's avatar
      Merge tag 'md/3.13' of git://neil.brown.name/md · 6d6e352c
      Linus Torvalds authored
      Pull md update from Neil Brown:
       "Mostly optimisations and obscure bug fixes.
         - raid5 gets less lock contention
         - raid1 gets less contention between normal-io and resync-io during
           resync"
      
      * tag 'md/3.13' of git://neil.brown.name/md:
        md/raid5: Use conf->device_lock protect changing of multi-thread resources.
        md/raid5: Before freeing old multi-thread worker, it should flush them.
        md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
        UAPI: include <asm/byteorder.h> in linux/raid/md_p.h
        raid1: Rewrite the implementation of iobarrier.
        raid1: Add some macros to make code clearly.
        raid1: Replace raise_barrier/lower_barrier with freeze_array/unfreeze_array when reconfiguring the array.
        raid1: Add a field array_frozen to indicate whether raid in freeze state.
        md: Convert use of typedef ctl_table to struct ctl_table
        md/raid5: avoid deadlock when raid5 array has unack badblocks during md_stop_writes.
        md: use MD_RECOVERY_INTR instead of kthread_should_stop in resync thread.
        md: fix some places where mddev_lock return value is not checked.
        raid5: Retry R5_ReadNoMerge flag when hit a read error.
        raid5: relieve lock contention in get_active_stripe()
        raid5: relieve lock contention in get_active_stripe()
        wait: add wait_event_cmd()
        md/raid5.c: add proper locking to error path of raid5_start_reshape.
        md: fix calculation of stacking limits on level change.
        raid5: Use slow_path to release stripe when mddev->thread is null
      6d6e352c
    • Phillip Lougher's avatar
      Squashfs: Check stream is not NULL in decompressor_multi.c · ed4f381e
      Phillip Lougher authored
      Fix static checker complaint that stream is not checked in
      squashfs_decompressor_destroy().
      Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      ed4f381e
    • Phillip Lougher's avatar
      Squashfs: Directly decompress into the page cache for file data · 0d455c12
      Phillip Lougher authored
      This introduces an implementation of squashfs_readpage_block()
      that directly decompresses into the page cache.
      
      This uses the previously added page handler abstraction to push
      down the necessary kmap_atomic/kunmap_atomic operations on the
      page cache buffers into the decompressors.  This enables
      direct copying into the page cache without using the slow
      kmap/kunmap calls.
      
      The code detects when multiple threads are racing in
      squashfs_readpage() to decompress the same block, and avoids
      this regression by falling back to using an intermediate
      buffer.
      
      This patch enhances the performance of Squashfs significantly
      when multiple processes are accessing the filesystem simultaneously
      because it not only reduces memcopying, but it more importantly
      eliminates the lock contention on the intermediate buffer.
      
      Using single-thread decompression.
      
              dd if=file1 of=/dev/null bs=4096 &
              dd if=file2 of=/dev/null bs=4096 &
              dd if=file3 of=/dev/null bs=4096 &
              dd if=file4 of=/dev/null bs=4096
      
      Before:
      
      629145600 bytes (629 MB) copied, 45.8046 s, 13.7 MB/s
      
      After:
      
      629145600 bytes (629 MB) copied, 9.29414 s, 67.7 MB/s
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      0d455c12
    • Phillip Lougher's avatar
      Squashfs: Restructure squashfs_readpage() · 5f55dbc0
      Phillip Lougher authored
      Restructure squashfs_readpage() splitting it into separate
      functions for datablocks, fragments and sparse blocks.
      
      Move the memcpying (from squashfs cache entry) implementation of
      squashfs_readpage_block into file_cache.c
      
      This allows different implementations to be supported.
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      5f55dbc0
    • Phillip Lougher's avatar
      Squashfs: Generalise paging handling in the decompressors · 846b730e
      Phillip Lougher authored
      Further generalise the decompressors by adding a page handler
      abstraction.  This adds helpers to allow the decompressors
      to access and process the output buffers in an implementation
      independant manner.
      
      This allows different types of output buffer to be passed
      to the decompressors, with the implementation specific
      aspects handled at decompression time, but without the
      knowledge being held in the decompressor wrapper code.
      
      This will allow the decompressors to handle Squashfs
      cache buffers, and page cache pages.
      
      This patch adds the abstraction and an implementation for
      the caches.
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      846b730e
    • Phillip Lougher's avatar
      Squashfs: add multi-threaded decompression using percpu variable · d208383d
      Phillip Lougher authored
      Add a multi-threaded decompression implementation which uses
      percpu variables.
      
      Using percpu variables has advantages and disadvantages over
      implementations which do not use percpu variables.
      
      Advantages:
        * the nature of percpu variables ensures decompression is
          load-balanced across the multiple cores.
        * simplicity.
      
      Disadvantages: it limits decompression to one thread per core.
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      d208383d
    • Minchan Kim's avatar
      squashfs: Enhance parallel I/O · cd59c2ec
      Minchan Kim authored
      Now squashfs have used for only one stream buffer for decompression
      so it hurts parallel read performance so this patch supports
      multiple decompressor to enhance performance parallel I/O.
      
      Four 1G file dd read on KVM machine which has 2 CPU and 4G memory.
      
      dd if=test/test1.dat of=/dev/null &
      dd if=test/test2.dat of=/dev/null &
      dd if=test/test3.dat of=/dev/null &
      dd if=test/test4.dat of=/dev/null &
      
      old : 1m39s -> new : 9s
      
      * From v1
        * Change comp_strm with decomp_strm - Phillip
        * Change/add comments - Phillip
      Signed-off-by: default avatarMinchan Kim <minchan@kernel.org>
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      cd59c2ec
    • Phillip Lougher's avatar
      Squashfs: Refactor decompressor interface and code · 9508c6b9
      Phillip Lougher authored
      The decompressor interface and code was written from
      the point of view of single-threaded operation.  In doing
      so it mixed a lot of single-threaded implementation specific
      aspects into the decompressor code and elsewhere which makes it
      difficult to seamlessly support multiple different decompressor
      implementations.
      
      This patch does the following:
      
      1.  It removes compressor_options parsing from the decompressor
          init() function.  This allows the decompressor init() function
          to be dynamically called to instantiate multiple decompressors,
          without the compressor options needing to be read and parsed each
          time.
      
      2.  It moves threading and all sleeping operations out of the
          decompressors.  In doing so, it makes the decompressors
          non-blocking wrappers which only deal with interfacing with
          the decompressor implementation.
      
      3. It splits decompressor.[ch] into decompressor generic functions
         in decompressor.[ch], and moves the single threaded
         decompressor implementation into decompressor_single.c.
      
      The result of this patch is Squashfs should now be able to
      support multiple decompressors by adding new decompressor_xxx.c
      files with specialised implementations of the functions in
      decompressor_single.c
      Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
      Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      9508c6b9
    • Jens Axboe's avatar
      blk-mq: add blktrace insert event trace · 01b983c9
      Jens Axboe authored
      We need it to make 'btt' from blktrace happy, otherwise
      we are missing one state transition.
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      01b983c9
    • Shaohua Li's avatar
      virtio-blk: virtqueue_kick() must be ordered with other virtqueue operations · f02b9ac3
      Shaohua Li authored
      It isn't safe to call it without holding the vblk->vq_lock.
      Reported-by: default avatarDave Chinner <david@fromorbit.com>
      Signed-off-by: default avatarShaohua Li <shli@fusionio.com>
      
      Fixed another condition of virtqueue_kick() not holding the lock.
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      f02b9ac3
    • Mahesh Rajashekhara's avatar
      aacraid: prevent invalid pointer dereference · b4789b8e
      Mahesh Rajashekhara authored
      It appears that driver runs into a problem here if fibsize is too small
      because we allocate user_srbcmd with fibsize size only but later we
      access it until user_srbcmd->sg.count to copy it over to srbcmd.
      
      It is not correct to test (fibsize < sizeof(*user_srbcmd)) because this
      structure already includes one sg element and this is not needed for
      commands without data.  So, we would recommend to add the following
      (instead of test for fibsize == 0).
      Signed-off-by: default avatarMahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
      Reported-by: default avatarNico Golde <nico@ngolde.de>
      Reported-by: default avatarFabian Yamaguchi <fabs@goesec.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b4789b8e
  2. 19 Nov, 2013 22 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 1ee2dcc2
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       "Mostly these are fixes for fallout due to merge window changes, as
        well as cures for problems that have been with us for a much longer
        period of time"
      
       1) Johannes Berg noticed two major deficiencies in our genetlink
          registration.  Some genetlink protocols we passing in constant
          counts for their ops array rather than something like
          ARRAY_SIZE(ops) or similar.  Also, some genetlink protocols were
          using fixed IDs for their multicast groups.
      
          We have to retain these fixed IDs to keep existing userland tools
          working, but reserve them so that other multicast groups used by
          other protocols can not possibly conflict.
      
          In dealing with these two problems, we actually now use less state
          management for genetlink operations and multicast groups.
      
       2) When configuring interface hardware timestamping, fix several
          drivers that simply do not validate that the hwtstamp_config value
          is one the driver actually supports.  From Ben Hutchings.
      
       3) Invalid memory references in mwifiex driver, from Amitkumar Karwar.
      
       4) In dev_forward_skb(), set the skb->protocol in the right order
          relative to skb_scrub_packet().  From Alexei Starovoitov.
      
       5) Bridge erroneously fails to use the proper wrapper functions to make
          calls to netdev_ops->ndo_vlan_rx_{add,kill}_vid.  Fix from Toshiaki
          Makita.
      
       6) When detaching a bridge port, make sure to flush all VLAN IDs to
          prevent them from leaking, also from Toshiaki Makita.
      
       7) Put in a compromise for TCP Small Queues so that deep queued devices
          that delay TX reclaim non-trivially don't have such a performance
          decrease.  One particularly problematic area is 802.11 AMPDU in
          wireless.  From Eric Dumazet.
      
       8) Fix crashes in tcp_fastopen_cache_get(), we can see NULL socket dsts
          here.  Fix from Eric Dumzaet, reported by Dave Jones.
      
       9) Fix use after free in ipv6 SIT driver, from Willem de Bruijn.
      
      10) When computing mergeable buffer sizes, virtio-net fails to take the
          virtio-net header into account.  From Michael Dalton.
      
      11) Fix seqlock deadlock in ip4_datagram_connect() wrt.  statistic
          bumping, this one has been with us for a while.  From Eric Dumazet.
      
      12) Fix NULL deref in the new TIPC fragmentation handling, from Erik
          Hugne.
      
      13) 6lowpan bit used for traffic classification was wrong, from Jukka
          Rissanen.
      
      14) macvlan has the same issue as normal vlans did wrt.  propagating LRO
          disabling down to the real device, fix it the same way.  From Michal
          Kubecek.
      
      15) CPSW driver needs to soft reset all slaves during suspend, from
          Daniel Mack.
      
      16) Fix small frame pacing in FQ packet scheduler, from Eric Dumazet.
      
      17) The xen-netfront RX buffer refill timer isn't properly scheduled on
          partial RX allocation success, from Ma JieYue.
      
      18) When ipv6 ping protocol support was added, the AF_INET6 protocol
          initialization cleanup path on failure was borked a little.  Fix
          from Vlad Yasevich.
      
      19) If a socket disconnects during a read/recvmsg/recvfrom/etc that
          blocks we can do the wrong thing with the msg_name we write back to
          userspace.  From Hannes Frederic Sowa.  There is another fix in the
          works from Hannes which will prevent future problems of this nature.
      
      20) Fix route leak in VTI tunnel transmit, from Fan Du.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (106 commits)
        genetlink: make multicast groups const, prevent abuse
        genetlink: pass family to functions using groups
        genetlink: add and use genl_set_err()
        genetlink: remove family pointer from genl_multicast_group
        genetlink: remove genl_unregister_mc_group()
        hsr: don't call genl_unregister_mc_group()
        quota/genetlink: use proper genetlink multicast APIs
        drop_monitor/genetlink: use proper genetlink multicast APIs
        genetlink: only pass array to genl_register_family_with_ops()
        tcp: don't update snd_nxt, when a socket is switched from repair mode
        atm: idt77252: fix dev refcnt leak
        xfrm: Release dst if this dst is improper for vti tunnel
        netlink: fix documentation typo in netlink_set_err()
        be2net: Delete secondary unicast MAC addresses during be_close
        be2net: Fix unconditional enabling of Rx interface options
        net, virtio_net: replace the magic value
        ping: prevent NULL pointer dereference on write to msg_name
        bnx2x: Prevent "timeout waiting for state X"
        bnx2x: prevent CFC attention
        bnx2x: Prevent panic during DMAE timeout
        ...
      1ee2dcc2
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 4457e6f6
      Linus Torvalds authored
      Pull sparc fixes from David Miller:
       "Two merge window fallout build fixes"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc64: merge fix
        sparc64: fix build regession
      4457e6f6
    • Linus Torvalds's avatar
      Merge tag 'please-pull-fixia64' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux · e87e7be9
      Linus Torvalds authored
      Pull ia64 fix from Tony Luck:
       "Unbreak ia64 build by avoiding circular dependency"
      
      * tag 'please-pull-fixia64' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
        kernel/bounds: avoid circular dependencies in generated headers
      e87e7be9
    • Kirill A. Shutemov's avatar
      kernel/bounds: avoid circular dependencies in generated headers · 24b9fdc5
      Kirill A. Shutemov authored
      <linux/spinlock.h> has heavy dependencies on other header files.
      It triggers circular dependencies in generated headers on IA64, at
      least:
      
        CC      kernel/bounds.s
      In file included from /home/space/kas/git/public/linux/arch/ia64/include/asm/thread_info.h:9:0,
                       from include/linux/thread_info.h:54,
                       from include/asm-generic/preempt.h:4,
                       from arch/ia64/include/generated/asm/preempt.h:1,
                       from include/linux/preempt.h:18,
                       from include/linux/spinlock.h:50,
                       from kernel/bounds.c:14:
      /home/space/kas/git/public/linux/arch/ia64/include/asm/asm-offsets.h:1:35: fatal error: generated/asm-offsets.h: No such file or directory
      compilation terminated.
      
      Let's replace <linux/spinlock.h> with <linux/spinlock_types.h>, it's
      enough to find out size of spinlock_t.
      Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
      Reported-and-Tested-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
      24b9fdc5
    • David S. Miller's avatar
      Merge branch 'genetlink_mcast' · 091e0662
      David S. Miller authored
      Johannes Berg says:
      
      ====================
      genetlink: clean up multicast group APIs
      
      The generic netlink multicast group registration doesn't have to
      be dynamic, and can thus be simplified just like I did with the
      ops. This removes some complexity in registration code.
      
      Additionally, two users of generic netlink already use multicast
      groups in a wrong way, add workarounds for those two to keep the
      userspace API working, but at the same time make them not clash
      with other users of multicast groups as might happen now.
      
      While making it all a bit easier, also prevent such abuse by adding
      checks to the APIs so each family can only use the groups it owns.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      091e0662
    • Johannes Berg's avatar
      genetlink: make multicast groups const, prevent abuse · 2a94fe48
      Johannes Berg authored
      Register generic netlink multicast groups as an array with
      the family and give them contiguous group IDs. Then instead
      of passing the global group ID to the various functions that
      send messages, pass the ID relative to the family - for most
      families that's just 0 because the only have one group.
      
      This avoids the list_head and ID in each group, adding a new
      field for the mcast group ID offset to the family.
      
      At the same time, this allows us to prevent abusing groups
      again like the quota and dropmon code did, since we can now
      check that a family only uses a group it owns.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2a94fe48
    • Johannes Berg's avatar
      genetlink: pass family to functions using groups · 68eb5503
      Johannes Berg authored
      This doesn't really change anything, but prepares for the
      next patch that will change the APIs to pass the group ID
      within the family, rather than the global group ID.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      68eb5503
    • Johannes Berg's avatar
      genetlink: add and use genl_set_err() · 62b68e99
      Johannes Berg authored
      Add a static inline to generic netlink to wrap netlink_set_err()
      to make it easier to use here - use it in openvswitch (the only
      generic netlink user of netlink_set_err()).
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      62b68e99
    • Johannes Berg's avatar
      genetlink: remove family pointer from genl_multicast_group · c2ebb908
      Johannes Berg authored
      There's no reason to have the family pointer there since it
      can just be passed internally where needed, so remove it.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c2ebb908
    • Johannes Berg's avatar
      genetlink: remove genl_unregister_mc_group() · 06fb555a
      Johannes Berg authored
      There are no users of this API remaining, and we'll soon
      change group registration to be static (like ops are now)
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      06fb555a
    • Johannes Berg's avatar
      hsr: don't call genl_unregister_mc_group() · 03ed3827
      Johannes Berg authored
      There's no need to unregister the multicast group if the
      generic netlink family is registered immediately after.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      03ed3827
    • Johannes Berg's avatar
      quota/genetlink: use proper genetlink multicast APIs · 2ecf7536
      Johannes Berg authored
      The quota code is abusing the genetlink API and is using
      its family ID as the multicast group ID, which is invalid
      and may belong to somebody else (and likely will.)
      
      Make the quota code use the correct API, but since this
      is already used as-is by userspace, reserve a family ID
      for this code and also reserve that group ID to not break
      userspace assumptions.
      Acked-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2ecf7536
    • Johannes Berg's avatar
      drop_monitor/genetlink: use proper genetlink multicast APIs · e5dcecba
      Johannes Berg authored
      The drop monitor code is abusing the genetlink API and is
      statically using the generic netlink multicast group 1, even
      if that group belongs to somebody else (which it invariably
      will, since it's not reserved.)
      
      Make the drop monitor code use the proper APIs to reserve a
      group ID, but also reserve the group id 1 in generic netlink
      code to preserve the userspace API. Since drop monitor can
      be a module, don't clear the bit for it on unregistration.
      Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e5dcecba
    • Johannes Berg's avatar
      genetlink: only pass array to genl_register_family_with_ops() · c53ed742
      Johannes Berg authored
      As suggested by David Miller, make genl_register_family_with_ops()
      a macro and pass only the array, evaluating ARRAY_SIZE() in the
      macro, this is a little safer.
      
      The openvswitch has some indirection, assing ops/n_ops directly in
      that code. This might ultimately just assign the pointers in the
      family initializations, saving the struct genl_family_and_ops and
      code (once mcast groups are handled differently.)
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c53ed742
    • Andrey Vagin's avatar
      tcp: don't update snd_nxt, when a socket is switched from repair mode · dbde4979
      Andrey Vagin authored
      snd_nxt must be updated synchronously with sk_send_head.  Otherwise
      tp->packets_out may be updated incorrectly, what may bring a kernel panic.
      
      Here is a kernel panic from my host.
      [  103.043194] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048
      [  103.044025] IP: [<ffffffff815aaaaf>] tcp_rearm_rto+0xcf/0x150
      ...
      [  146.301158] Call Trace:
      [  146.301158]  [<ffffffff815ab7f0>] tcp_ack+0xcc0/0x12c0
      
      Before this panic a tcp socket was restored. This socket had sent and
      unsent data in the write queue. Sent data was restored in repair mode,
      then the socket was switched from reapair mode and unsent data was
      restored. After that the socket was switched back into repair mode.
      
      In that moment we had a socket where write queue looks like this:
      snd_una    snd_nxt   write_seq
         |_________|________|
                   |
      	  sk_send_head
      
      After a second switching from repair mode the state of socket was
      changed:
      
      snd_una          snd_nxt, write_seq
         |_________ ________|
                   |
      	  sk_send_head
      
      This state is inconsistent, because snd_nxt and sk_send_head are not
      synchronized.
      
      Bellow you can find a call trace, how packets_out can be incremented
      twice for one skb, if snd_nxt and sk_send_head are not synchronized.
      In this case packets_out will be always positive, even when
      sk_write_queue is empty.
      
      tcp_write_wakeup
      	skb = tcp_send_head(sk);
      	tcp_fragment
      		if (!before(tp->snd_nxt, TCP_SKB_CB(buff)->end_seq))
      			tcp_adjust_pcount(sk, skb, diff);
      	tcp_event_new_data_sent
      		tp->packets_out += tcp_skb_pcount(skb);
      
      I think update of snd_nxt isn't required, when a socket is switched from
      repair mode.  Because it's initialized in tcp_connect_init. Then when a
      write queue is restored, snd_nxt is incremented in tcp_event_new_data_sent,
      so it's always is in consistent state.
      
      I have checked, that the bug is not reproduced with this patch and
      all tests about restoring tcp connections work fine.
      
      Cc: Pavel Emelyanov <xemul@parallels.com>
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
      Cc: James Morris <jmorris@namei.org>
      Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
      Cc: Patrick McHardy <kaber@trash.net>
      Signed-off-by: default avatarAndrey Vagin <avagin@openvz.org>
      Acked-by: default avatarPavel Emelyanov <xemul@parallels.com>
      Acked-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dbde4979
    • Ying Xue's avatar
      atm: idt77252: fix dev refcnt leak · b5de4a22
      Ying Xue authored
      init_card() calls dev_get_by_name() to get a network deceive. But it
      doesn't decrease network device reference count after the device is
      used.
      Signed-off-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b5de4a22
    • fan.du's avatar
      xfrm: Release dst if this dst is improper for vti tunnel · 236c9f84
      fan.du authored
      After searching rt by the vti tunnel dst/src parameter,
      if this rt has neither attached to any transformation
      nor the transformation is not tunnel oriented, this rt
      should be released back to ip layer.
      
      otherwise causing dst memory leakage.
      Signed-off-by: default avatarFan Du <fan.du@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      236c9f84
    • Rafael J. Wysocki's avatar
      Merge branch 'acpi-hotplug' · ed6a8254
      Rafael J. Wysocki authored
      * acpi-hotplug:
        PCI / hotplug / ACPI: Drop unused acpiphp_debug declaration
      ed6a8254
    • Mika Westerberg's avatar
      PCI / hotplug / ACPI: Drop unused acpiphp_debug declaration · 296e5809
      Mika Westerberg authored
      Commit bd950799 (PCI: acpiphp: Convert to dynamic debug) removed users
      of acpiphp_debug variable and the variable itself but the declaration was
      left in the header file. Drop this unused declaration.
      Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
      Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
      Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      296e5809
    • Johannes Berg's avatar
      netlink: fix documentation typo in netlink_set_err() · 840e93f2
      Johannes Berg authored
      The parameter is just 'group', not 'groups', fix the documentation typo.
      Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      840e93f2
    • Linus Torvalds's avatar
      Merge tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · dec8e461
      Linus Torvalds authored
      Pull second set of ARC changes from Vineet Gupta:
       - Support for Perf from Mischa
       - Enabling GPIO/Pinctrl drivers for Abilis TB10x platform
       - New defconfig for buildroot
      
      * tag 'arc-v3.13-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARC: [plat-arcfpga] Add defconfig without initramfs location
        ARC: perf: ARC 700 PMU doesn't support sampling events
        ARC: Add documentation on DT binding for ARC700 PMU
        ARC: Add perf support for ARC700 cores
        ARC: [TB10x] Updates for GPIO and pinctrl
      dec8e461
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 806dace6
      Linus Torvalds authored
      Pull second set of s390 patches from Martin Schwidefsky:
       "The handling of the PCI hotplug notifications has been improved, the
        zfcp dumper can now detect the HSA size dynamically and the default
        install kernel has been changed to the compressed bzImage.  And two
        bug-fixes for scm and 3720"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/pci: implement hotplug notifications
        s390/scm_block: do not hide eadm subchannel dependency
        s390/sclp: Consolidate early sclp init calls to sclp_early_detect()
        s390/sclp: Move early code from sclp_cmd.c to sclp_early.c
        s390/sclp: Determine HSA size dynamically for zfcpdump
        s390/sclp: Move declarations for sclp_sdias into separate header file
        s390/pci: implement pcibios_remove_bus
        s390/pci: improve handling of bus resources
        s390/3270: fix missing device_destroy() call
        s390/boot: Install bzImage as default kernel image
      806dace6