1. 20 May, 2014 5 commits
    • Lai Jiangshan's avatar
      workqueue: separate iteration role from worker_idr · da028469
      Lai Jiangshan authored
      
      
      worker_idr has the iteration (iterating for attached workers) and
      worker ID duties. These two duties don't have to be tied together. We
      can separate them and use a list for tracking attached workers and
      iteration.
      
      Before this separation, it wasn't possible to add rescuer workers to
      worker_idr due to rescuer workers couldn't allocate ID dynamically
      because ID-allocation depends on memory-allocation, which rescuer
      can't depend on.
      
      After separation, we can easily add the rescuer workers to the list for
      iteration without any memory-allocation. It is required when we attach
      the rescuer worker to the pool in later patch.
      
      tj: Minor description updates.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      da028469
    • Lai Jiangshan's avatar
      workqueue: destroy worker directly in the idle timeout handler · 3347fc9f
      Lai Jiangshan authored
      
      
      Since destroy_worker() doesn't need to sleep nor require manager_mutex,
      destroy_worker() can be directly called in the idle timeout
      handler, it helps us remove POOL_MANAGE_WORKERS and
      maybe_destroy_worker() and simplify the manage_workers()
      
      After POOL_MANAGE_WORKERS is removed, worker_thread() doesn't
      need to test whether it needs to manage after processed works.
      So we can remove the test branch.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      3347fc9f
    • Lai Jiangshan's avatar
      workqueue: async worker destruction · 60f5a4bc
      Lai Jiangshan authored
      
      
      worker destruction includes these parts of code:
      	adjust pool's stats
      	remove the worker from idle list
      	detach the worker from the pool
      	kthread_stop() to wait for the worker's task exit
      	free the worker struct
      
      We can find out that there is no essential work to do after
      kthread_stop(), which means destroy_worker() doesn't need to wait for
      the worker's task exit, so we can remove kthread_stop() and free the
      worker struct in the worker exiting path.
      
      However, put_unbound_pool() still needs to sync the all the workers'
      destruction before destroying the pool; otherwise, the workers may
      access to the invalid pool when they are exiting.
      
      So we also move the code of "detach the worker" to the exiting
      path and let put_unbound_pool() to sync with this code via
      detach_completion.
      
      The code of "detach the worker" is wrapped in a new function
      "worker_detach_from_pool()" although worker_detach_from_pool() is only
      called once (in worker_thread()) after this patch, but we need to wrap
      it for these reasons:
      
        1) The code of "detach the worker" is not short enough to unfold them
           in worker_thread().
        2) the name of "worker_detach_from_pool()" is self-comment, and we add
           some comments above the function.
        3) it will be shared by rescuer in later patch which allows rescuer
           and normal thread use the same attach/detach frameworks.
      
      The worker id is freed when detaching which happens before the worker
      is fully dead, but this id of the dying worker may be re-used for a
      new worker, so the dying worker's task name is changed to
      "worker/dying" to avoid two or several workers having the same name.
      
      Since "detach the worker" is moved out from destroy_worker(),
      destroy_worker() doesn't require manager_mutex, so the
      "lockdep_assert_held(&pool->manager_mutex)" in destroy_worker() is
      removed, and destroy_worker() is not protected by manager_mutex in
      put_unbound_pool().
      
      tj: Minor description updates.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      60f5a4bc
    • Lai Jiangshan's avatar
      workqueue: destroy_worker() should destroy idle workers only · 73eb7fe7
      Lai Jiangshan authored
      
      
      We used to have the CPU online failure path where a worker is created
      and then destroyed without being started. A worker was created for
      the CPU coming online and if the online operation failed the created worker
      was shut down without being started.  But this behavior was changed.
      The first worker is created and started at the same time for the CPU coming
      online.
      
      It means that we had already ensured in the code that destroy_worker()
      destroys only idle workers and we don't want to allow it to destroy
      any non-idle worker in the future. Otherwise, it may be buggy and it
      may be extremely hard to check. We should force destroy_worker() to
      destroy only idle workers explicitly.
      
      Since destroy_worker() destroys only idle workers, this patch does not
      change any functionality. We just need to update the comments and the
      sanity check code.
      
      In the sanity check code, we will refuse to destroy the worker
      if !(worker->flags & WORKER_IDLE).
      
      If the worker entered idle which means it is already started,
      so we remove the check of "worker->flags & WORKER_STARTED",
      after this removal, WORKER_STARTED is totally unneeded,
      so we remove WORKER_STARTED too.
      
      In the comments for create_worker(), "Create a new worker which is bound..."
      is changed to "... which is attached..." due to we change the name of this
      behavior to attaching.
      
      tj: Minor description / comment updates.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      73eb7fe7
    • Lai Jiangshan's avatar
      workqueue: use manager lock only to protect worker_idr · 9625ab17
      Lai Jiangshan authored
      
      
      worker_idr is highly bound to managers and is always/only accessed in manager
      lock context. So we don't need pool->lock for it.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      9625ab17
  2. 14 May, 2014 2 commits
  3. 12 May, 2014 1 commit
  4. 18 Apr, 2014 3 commits
    • Daeseok Youn's avatar
      workqueue: simplify wq_update_unbound_numa() by jumping to use_dfl_pwq if the... · 534a3fbb
      Daeseok Youn authored
      
      workqueue: simplify wq_update_unbound_numa() by jumping to use_dfl_pwq if the target cpumask equals wq's
      
      wq_update_unbound_numa(), when it's decided that the newly updated
      cpumask equals the default, looks at whether the current pwq is
      already the default one and skips setting pwq to the default one.
      This extra step is unnecessary and we can always jump to use_dfl_pwq
      instead. Simplify the code by removing the conditional.
      This doesn't make any functional difference.
      Signed-off-by: default avatarDaeseok Youn <daeseok.youn@gmail.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      534a3fbb
    • Lai Jiangshan's avatar
      workqueue: fix a possible race condition between rescuer and pwq-release · 77668c8b
      Lai Jiangshan authored
      
      
      There is a race condition between rescuer_thread() and
      pwq_unbound_release_workfn().
      
      Even after a pwq is scheduled for rescue, the associated work items
      may be consumed by any worker.  If all of them are consumed before the
      rescuer gets to them and the pwq's base ref was put due to attribute
      change, the pwq may be released while still being linked on
      @wq->maydays list making the rescuer dereference already freed pwq
      later.
      
      Make send_mayday() pin the target pwq until the rescuer is done with
      it.
      
      tj: Updated comment and patch description.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: stable@vger.kernel.org # v3.10+
      77668c8b
    • Lai Jiangshan's avatar
      workqueue: make rescuer_thread() empty wq->maydays list before exiting · 4d595b86
      Lai Jiangshan authored
      
      
      After a @pwq is scheduled for emergency execution, other workers may
      consume the affectd work items before the rescuer gets to them.  This
      means that a workqueue many have pwqs queued on @wq->maydays list
      while not having any work item pending or in-flight.  If
      destroy_workqueue() executes in such condition, the rescuer may exit
      without emptying @wq->maydays.
      
      This currently doesn't cause any actual harm.  destroy_workqueue() can
      safely destroy all the involved data structures whether @wq->maydays
      is populated or not as nobody access the list once the rescuer exits.
      
      However, this is nasty and makes future development difficult.  Let's
      update rescuer_thread() so that it empties @wq->maydays after seeing
      should_stop to guarantee that the list is empty on rescuer exit.
      
      tj: Updated comment and patch description.
      Signed-off-by: default avatarLai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: stable@vger.kernel.org # v3.10+
      4d595b86
  5. 16 Apr, 2014 1 commit
  6. 13 Apr, 2014 12 commits
    • Linus Torvalds's avatar
      Linux 3.15-rc1 · c9eaa447
      Linus Torvalds authored
      c9eaa447
    • Geert Uytterhoeven's avatar
      mm: Initialize error in shmem_file_aio_read() · f7c1d074
      Geert Uytterhoeven authored
      Some versions of gcc even warn about it:
      
        mm/shmem.c: In function ‘shmem_file_aio_read’:
        mm/shmem.c:1414: warning: ‘error’ may be used uninitialized in this function
      
      If the loop is aborted during the first iteration by one of the two
      first break statements, error will be uninitialized.
      
      Introduced by commit 6e58e79d
      
       ("introduce copy_page_to_iter, kill
      loop over iovec in generic_file_aio_read()").
      Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f7c1d074
    • Geert Uytterhoeven's avatar
      cifs: Use min_t() when comparing "size_t" and "unsigned long" · e686bd8d
      Geert Uytterhoeven authored
      On 32 bit, size_t is "unsigned int", not "unsigned long", causing the
      following warning when comparing with PAGE_SIZE, which is always "unsigned
      long":
      
        fs/cifs/file.c: In function ‘cifs_readdata_to_iov’:
        fs/cifs/file.c:2757: warning: comparison of distinct pointer types lacks a cast
      
      Introduced by commit 7f25bba8
      
       ("cifs_iovec_read: keep iov_iter
      between the calls of cifs_readdata_to_iov()"), which changed the
      signedness of "remaining" and the code from min_t() to min().
      Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e686bd8d
    • Linus Torvalds's avatar
      Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux · bf3a3407
      Linus Torvalds authored
      Pull slab changes from Pekka Enberg:
       "The biggest change is byte-sized freelist indices which reduces slab
        freelist memory usage:
      
          https://lkml.org/lkml/2013/12/2/64"
      
      * 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux:
        mm: slab/slub: use page->list consistently instead of page->lru
        mm/slab.c: cleanup outdated comments and unify variables naming
        slab: fix wrongly used macro
        slub: fix high order page allocation problem with __GFP_NOFAIL
        slab: Make allocations with GFP_ZERO slightly more efficient
        slab: make more slab management structure off the slab
        slab: introduce byte sized index for the freelist of a slab
        slab: restrict the number of objects in a slab
        slab: introduce helper functions to get/set free object
        slab: factor out calculate nr objects in cache_estimate
      bf3a3407
    • Linus Torvalds's avatar
      Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild · 321d03c8
      Linus Torvalds authored
      Pull misc kbuild changes from Michal Marek:
       "Here is the non-critical part of kbuild:
         - One bogus coccinelle check removed, one check fixed not to suggest
           the obsolete PTR_RET macro
         - scripts/tags.sh does not index the generated *.mod.c files
         - new objdiff tool to list differences between two versions of an
           object file
         - A fix for scripts/bootgraph.pl"
      
      * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
        scripts/coccinelle: Use PTR_ERR_OR_ZERO
        scripts/bootgraph.pl: Add graphic header
        scripts: objdiff: detect object code changes between two commits
        Coccicheck: Remove memcpy to struct assignment test
        scripts/tags.sh: Ignore *.mod.c
      321d03c8
    • Mikulas Patocka's avatar
      sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue · fd1232b2
      Mikulas Patocka authored
      
      
      This patch fixes I/O errors with the sym53c8xx_2 driver when the disk
      returns QUEUE FULL status.
      
      When the controller encounters an error (including QUEUE FULL or BUSY
      status), it aborts all not yet submitted requests in the function
      sym_dequeue_from_squeue.
      
      This function aborts them with DID_SOFT_ERROR.
      
      If the disk has full tag queue, the request that caused the overflow is
      aborted with QUEUE FULL status (and the scsi midlayer properly retries
      it until it is accepted by the disk), but the sym53c8xx_2 driver aborts
      the following requests with DID_SOFT_ERROR --- for them, the midlayer
      does just a few retries and then signals the error up to sd.
      
      The result is that disk returning QUEUE FULL causes request failures.
      
      The error was reproduced on 53c895 with COMPAQ BD03685A24 disk
      (rebranded ST336607LC) with command queue 48 or 64 tags.  The disk has
      64 tags, but under some access patterns it return QUEUE FULL when there
      are less than 64 pending tags.  The SCSI specification allows returning
      QUEUE FULL anytime and it is up to the host to retry.
      Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
      Cc: Matthew Wilcox <matthew@wil.cx>
      Cc: James Bottomley <JBottomley@Parallels.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      fd1232b2
    • Paul Mackerras's avatar
      powerpc: Don't try to set LPCR unless we're in hypervisor mode · 18aa0da3
      Paul Mackerras authored
      Commit 8f619b54
      
       ("powerpc/ppc64: Do not turn AIL (reloc-on
      interrupts) too early") added code to set the AIL bit in the LPCR
      without checking whether the kernel is running in hypervisor mode.  The
      result is that when the kernel is running as a guest (i.e., under
      PowerKVM or PowerVM), the processor takes a privileged instruction
      interrupt at that point, causing a panic.  The visible result is that
      the kernel hangs after printing "returning from prom_init".
      
      This fixes it by checking for hypervisor mode being available before
      setting LPCR.  If we are not in hypervisor mode, we enable relocation-on
      interrupts later in pSeries_setup_arch using the H_SET_MODE hcall.
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      18aa0da3
    • Davidlohr Bueso's avatar
      futex: update documentation for ordering guarantees · d7e8af1a
      Davidlohr Bueso authored
      Commits 11d4616b ("futex: revert back to the explicit waiter
      counting code") and 69cd9eba
      
       ("futex: avoid race between requeue and
      wake") changed some of the finer details of how we think about futexes.
      One was a late fix and the other a consequence of overlooking the whole
      requeuing logic.
      
      The first change caused our documentation to be incorrect, and the
      second made us aware that we need to explicitly add more details to it.
      Signed-off-by: default avatarDavidlohr Bueso <davidlohr@hp.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d7e8af1a
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 454fd351
      Linus Torvalds authored
      Pull yet more networking updates from David Miller:
      
       1) Various fixes to the new Redpine Signals wireless driver, from
          Fariya Fatima.
      
       2) L2TP PPP connect code takes PMTU from the wrong socket, fix from
          Dmitry Petukhov.
      
       3) UFO and TSO packets differ in whether they include the protocol
          header in gso_size, account for that in skb_gso_transport_seglen().
         From Florian Westphal.
      
       4) If VLAN untagging fails, we double free the SKB in the bridging
          output path.  From Toshiaki Makita.
      
       5) Several call sites of sk->sk_data_ready() were referencing an SKB
          just added to the socket receive queue in order to calculate the
          second argument via skb->len.  This is dangerous because the moment
          the skb is added to the receive queue it can be consumed in another
          context and freed up.
      
          It turns out also that none of the sk->sk_data_ready()
          implementations even care about this second argument.
      
          So just kill it off and thus fix all these use-after-free bugs as a
          side effect.
      
       6) Fix inverted test in tcp_v6_send_response(), from Lorenzo Colitti.
      
       7) pktgen needs to do locking properly for LLTX devices, from Daniel
          Borkmann.
      
       8) xen-netfront driver initializes TX array entries in RX loop :-) From
          Vincenzo Maffione.
      
       9) After refactoring, some tunnel drivers allow a tunnel to be
          configured on top itself.  Fix from Nicolas Dichtel.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
        vti: don't allow to add the same tunnel twice
        gre: don't allow to add the same tunnel twice
        drivers: net: xen-netfront: fix array initialization bug
        pktgen: be friendly to LLTX devices
        r8152: check RTL8152_UNPLUG
        net: sun4i-emac: add promiscuous support
        net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
        net: ipv6: Fix oif in TCP SYN+ACK route lookup.
        drivers: net: cpsw: enable interrupts after napi enable and clearing previous interrupts
        drivers: net: cpsw: discard all packets received when interface is down
        net: Fix use after free by removing length arg from sk_data_ready callbacks.
        Drivers: net: hyperv: Address UDP checksum issues
        Drivers: net: hyperv: Negotiate suitable ndis version for offload support
        Drivers: net: hyperv: Allocate memory for all possible per-pecket information
        bridge: Fix double free and memory leak around br_allowed_ingress
        bonding: Remove debug_fs files when module init fails
        i40evf: program RSS LUT correctly
        i40evf: remove open-coded skb_cow_head
        ixgb: remove open-coded skb_cow_head
        igbvf: remove open-coded skb_cow_head
        ...
      454fd351
    • Linus Torvalds's avatar
      Merge tag 'blackfin-for-linus' of... · fd18f00d
      Linus Torvalds authored
      Merge tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux
      
      Pull blackfin updates from Steven Miao:
       "Code cleanup, some previously ignored patches, and bug fixes"
      
      * tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux:
        blackfin: cleanup board files
        bf609: clock: drop unused clock bit set/clear functions
        Blackfin: bf537: rename "CONFIG_ADT75"
        Blackfin: bf537: rename "CONFIG_AD7314"
        Blackfin: bf537: rename ad2s120x ->ad2s1200
        blackfin: bf537: fix typo "CONFIG_SND_SOC_ADV80X_MODULE"
        blackfin: dma: current count mmr is read only
        bfin_crc: Move architecture independant crc header file out of the blackfin folder.
        bf54x: drop unuesd HOST status,control,timeout registers bit define macros
        blackfin: portmux: cleanup head file
        Blackfin: remove "config IP_CHECKSUM_L1"
        blackfin: Remove GENERIC_GPIO config option again
        blackfin:Use generic /proc/interrupts implementation
        blackfin: bf60x: fix typo "CONFIG_PM_BFIN_WAKE_PA15_POL"
      fd18f00d
    • Linus Torvalds's avatar
      Merge tag 'remoteproc-3.15-cleanups' of... · de0c9cf9
      Linus Torvalds authored
      Merge tag 'remoteproc-3.15-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc
      
      Pull remoteproc cleanups from Ohad Ben-Cohen:
       "Several remoteproc cleanup patches coming from Jingoo Han, Julia
        Lawall and Uwe Kleine-König"
      
      * tag 'remoteproc-3.15-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
        remoteproc/ste_modem: staticize local symbols
        remoteproc/davinci: simplify use of devm_ioremap_resource
        remoteproc/davinci: drop needless devm_clk_put
      de0c9cf9
    • Linus Torvalds's avatar
      Merge tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel · 09c9b61d
      Linus Torvalds authored
      Pull llvm patches from Behan Webster:
       "These are some initial updates to support compiling the kernel with
        clang.
      
        These patches have been through the proper reviews to the best of my
        ability, and have been soaking in linux-next for a few weeks.  These
        patches by themselves still do not completely allow clang to be used
        with the kernel code, but lay the foundation for other patches which
        are still under review.
      
        Several other of the LLVMLinux patches have been already added via
        maintainer trees"
      
      * tag 'llvmlinux-for-v3.15' of git://git.linuxfoundation.org/llvmlinux/kernel:
        x86: LLVMLinux: Fix "incomplete type const struct x86cpu_device_id"
        x86 kbuild: LLVMLinux: More cc-options added for clang
        x86, acpi: LLVMLinux: Remove nested functions from Thinkpad ACPI
        LLVMLinux: Add support for clang to compiler.h and new compiler-clang.h
        LLVMLinux: Remove warning about returning an uninitialized variable
        kbuild: LLVMLinux: Fix LINUX_COMPILER definition script for compilation with clang
        Documentation: LLVMLinux: Update Documentation/dontdiff
        kbuild: LLVMLinux: Adapt warnings for compilation with clang
        kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang
      09c9b61d
  7. 12 Apr, 2014 16 commits
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 141eaccd
      Linus Torvalds authored
      Pull SCSI target updates from Nicholas Bellinger:
       "Here are the target pending updates for v3.15-rc1.  Apologies in
        advance for waiting until the second to last day of the merge window
        to send these out.
      
        The highlights this round include:
      
         - iser-target support for T10 PI (DIF) offloads (Sagi + Or)
         - Fix Task Aborted Status (TAS) handling in target-core (Alex Leung)
         - Pass in transport supported PI at session initialization (Sagi + MKP + nab)
         - Add WRITE_INSERT + READ_STRIP T10 PI support in target-core (nab + Sagi)
         - Fix iscsi-target ERL=2 ASYNC_EVENT connection pointer bug (nab)
         - Fix tcm_fc use-after-free of ft_tpg (Andy Grover)
         - Use correct ib_sg_dma primitives in ib_isert (Mike Marciniszyn)
      
        Also, note the virtio-scsi + vhost-scsi changes to expose T10 PI
        metadata into KVM guest have been left-out for now, as there where a
        few comments from MST + Paolo that where not able to be addressed in
        time for v3.15.  Please expect this feature for v3.16-rc1"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (43 commits)
        ib_srpt: Use correct ib_sg_dma primitives
        target/tcm_fc: Rename ft_tport_create to ft_tport_get
        target/tcm_fc: Rename ft_{add,del}_lport to {add,del}_wwn
        target/tcm_fc: Rename structs and list members for clarity
        target/tcm_fc: Limit to 1 TPG per wwn
        target/tcm_fc: Don't export ft_lport_list
        target/tcm_fc: Fix use-after-free of ft_tpg
        target: Add check to prevent Abort Task from aborting itself
        target: Enable READ_STRIP emulation in target_complete_ok_work
        target/sbc: Add sbc_dif_read_strip software emulation
        target: Enable WRITE_INSERT emulation in target_execute_cmd
        target/sbc: Add sbc_dif_generate software emulation
        target/sbc: Only expose PI read_cap16 bits when supported by fabric
        target/spc: Only expose PI mode page bits when supported by fabric
        target/spc: Only expose PI inquiry bits when supported by fabric
        target: Pass in transport supported PI at session initialization
        target/iblock: Fix double bioset_integrity_free bug
        Target/sbc: Initialize COMPARE_AND_WRITE write_sg scatterlist
        target/rd: T10-Dif: RAM disk is allocating more space than required.
        iscsi-target: Fix ERL=2 ASYNC_EVENT connection pointer bug
        ...
      141eaccd
    • Linus Torvalds's avatar
      Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · 93094449
      Linus Torvalds authored
      Pull media fixes from Mauro Carvalho Chehab:
       "A series of bug fix patches for v3.15-rc1.  Most are just driver
        fixes.  There are some changes at remote controller core level, fixing
        some definitions on a new API added for Kernel v3.15.
      
        It also adds the missing include at include/uapi/linux/v4l2-common.h,
        to allow its compilation on userspace, as pointed by you"
      
      * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (24 commits)
        [media] gpsca: remove the risk of a division by zero
        [media] stk1160: warrant a NUL terminated string
        [media] v4l: ti-vpe: retain v4l2_buffer flags for captured buffers
        [media] v4l: ti-vpe: Set correct field parameter for output and capture buffers
        [media] v4l: ti-vpe: zero out reserved fields in try_fmt
        [media] v4l: ti-vpe: Fix initial configuration queue data
        [media] v4l: ti-vpe: Use correct bus_info name for the device in querycap
        [media] v4l: ti-vpe: report correct capabilities in querycap
        [media] v4l: ti-vpe: Allow usage of smaller images
        [media] v4l: ti-vpe: Use video_device_release_empty
        [media] v4l: ti-vpe: Make sure in job_ready that we have the needed number of dst_bufs
        [media] lgdt3305: include sleep functionality in lgdt3304_ops
        [media] drx-j: use customise option correctly
        [media] m88rs2000: fix sparse static warnings
        [media] r820t: fix size and init values
        [media] rc-core: remove generic scancode filter
        [media] rc-core: split dev->s_filter
        [media] rc-core: do not change 32bit NEC scancode format for now
        [media] rtl28xxu: remove duplicate ID 0458:707f Genius TVGo DVB-T03
        [media] xc2028: add missing break to switch
        ...
      93094449
    • Linus Torvalds's avatar
      Merge tag 'ntb-3.15' of git://github.com/jonmason/ntb · 07f5fef9
      Linus Torvalds authored
      Pull PCIe non-transparent bridge fixes and features from Jon Mason:
       "NTB driver bug fixes to address issues in list traversal, skb leak in
        ntb_netdev, a typo, and a leak of msix entries in the error path.
        Clean ups of the event handling logic, as well as a overall style
        cleanup.  Finally, the driver was converted to use the new
        pci_enable_msix_range logic (and the refactoring to go along with it)"
      
      * tag 'ntb-3.15' of git://github.com/jonmason/ntb:
        ntb: Use pci_enable_msix_range() instead of pci_enable_msix()
        ntb: Split ntb_setup_msix() into separate BWD/SNB routines
        ntb: Use pci_msix_vec_count() to obtain number of MSI-Xs
        NTB: Code Style Clean-up
        NTB: client event cleanup
        ntb: Fix leakage of ntb_device::msix_entries[] array
        NTB: Fix typo in setting one translation register
        ntb_netdev: Fix skb free issue in open
        ntb_netdev: Fix list_for_each_entry exit issue
      07f5fef9
    • Linus Torvalds's avatar
      ceph: fix pr_fmt() redefinition · 96c57ade
      Linus Torvalds authored
      
      
      The vfs merge caused a latent bug to show up:
      
         In file included from fs/ceph/super.h:4:0,
                          from fs/ceph/ioctl.c:3:
         include/linux/ceph/ceph_debug.h:4:0: warning: "pr_fmt" redefined [enabled by default]
          #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
          ^
         In file included from include/linux/kernel.h:13:0,
                          from include/linux/uio.h:12,
                          from include/linux/socket.h:7,
                          from include/uapi/linux/in.h:22,
                          from include/linux/in.h:23,
                          from fs/ceph/ioctl.c:1:
         include/linux/printk.h:214:0: note: this is the location of the previous definition
          #define pr_fmt(fmt) fmt
          ^
      
      where the reason is that <linux/ceph_debug.h> is included much too late
      for the "pr_fmt()" define.
      
      The include of <linux/ceph_debug.h> needs to be the first include in the
      file, but fs/ceph/ioctl.c had for some reason missed that, and it wasn't
      noticeable until some unrelated header file changes brought in an
      indirect earlier include of <linux/kernel.h>.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      96c57ade
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 5166701b
      Linus Torvalds authored
      Pull vfs updates from Al Viro:
       "The first vfs pile, with deep apologies for being very late in this
        window.
      
        Assorted cleanups and fixes, plus a large preparatory part of iov_iter
        work.  There's a lot more of that, but it'll probably go into the next
        merge window - it *does* shape up nicely, removes a lot of
        boilerplate, gets rid of locking inconsistencie between aio_write and
        splice_write and I hope to get Kent's direct-io rewrite merged into
        the same queue, but some of the stuff after this point is having
        (mostly trivial) conflicts with the things already merged into
        mainline and with some I want more testing.
      
        This one passes LTP and xfstests without regressions, in addition to
        usual beating.  BTW, readahead02 in ltp syscalls testsuite has started
        giving failures since "mm/readahead.c: fix readahead failure for
        memoryless NUMA nodes and limit readahead pages" - might be a false
        positive, might be a real regression..."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
        missing bits of "splice: fix racy pipe->buffers uses"
        cifs: fix the race in cifs_writev()
        ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
        kill generic_file_buffered_write()
        ocfs2_file_aio_write(): switch to generic_perform_write()
        ceph_aio_write(): switch to generic_perform_write()
        xfs_file_buffered_aio_write(): switch to generic_perform_write()
        export generic_perform_write(), start getting rid of generic_file_buffer_write()
        generic_file_direct_write(): get rid of ppos argument
        btrfs_file_aio_write(): get rid of ppos
        kill the 5th argument of generic_file_buffered_write()
        kill the 4th argument of __generic_file_aio_write()
        lustre: don't open-code kernel_recvmsg()
        ocfs2: don't open-code kernel_recvmsg()
        drbd: don't open-code kernel_recvmsg()
        constify blk_rq_map_user_iov() and friends
        lustre: switch to kernel_sendmsg()
        ocfs2: don't open-code kernel_sendmsg()
        take iov_iter stuff to mm/iov_iter.c
        process_vm_access: tidy up a bit
        ...
      5166701b
    • David S. Miller's avatar
      Merge branch 'tunnels' · eda43ce0
      David S. Miller authored
      
      
      Nicolas Dichtel says:
      
      ====================
      tunnels: don't allow to add the same tunnel twice
      
      This series fixes the check of an existing tunnel with the same
      parameters when a new tunnel is added.  I've checked all users of
      ip_tunnel_newlink(): gre, gretap, ipip and vti. The bug exists only
      for gre and vti.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      eda43ce0
    • Nicolas Dichtel's avatar
      vti: don't allow to add the same tunnel twice · 8d89dcdf
      Nicolas Dichtel authored
      Before the patch, it was possible to add two times the same tunnel:
      ip l a vti1 type vti remote 10.16.0.121 local 10.16.0.249 key 41
      ip l a vti2 type vti remote 10.16.0.121 local 10.16.0.249 key 41
      
      It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
      argument dev->type, which was set only later (when calling ndo_init handler
      in register_netdevice()). Let's set this type in the setup handler, which is
      called before newlink handler.
      
      Introduced by commit b9959fd3
      
       ("vti: switch to new ip tunnel code").
      
      CC: Cong Wang <amwang@redhat.com>
      CC: Steffen Klassert <steffen.klassert@secunet.com>
      Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8d89dcdf
    • Nicolas Dichtel's avatar
      gre: don't allow to add the same tunnel twice · 5a455275
      Nicolas Dichtel authored
      Before the patch, it was possible to add two times the same tunnel:
      ip l a gre1 type gre remote 10.16.0.121 local 10.16.0.249
      ip l a gre2 type gre remote 10.16.0.121 local 10.16.0.249
      
      It was possible, because ip_tunnel_newlink() calls ip_tunnel_find() with the
      argument dev->type, which was set only later (when calling ndo_init handler
      in register_netdevice()). Let's set this type in the setup handler, which is
      called before newlink handler.
      
      Introduced by commit c5441932
      
       ("GRE: Refactor GRE tunneling code.").
      
      CC: Pravin B Shelar <pshelar@nicira.com>
      Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5a455275
    • Vincenzo Maffione's avatar
      drivers: net: xen-netfront: fix array initialization bug · 810d8ced
      Vincenzo Maffione authored
      
      
      This patch fixes the initialization of an array used in the TX
      datapath that was mistakenly initialized together with the
      RX datapath arrays. An out of range array access could happen
      when RX and TX rings had different sizes.
      Signed-off-by: default avatarVincenzo Maffione <v.maffione@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      810d8ced
    • David S. Miller's avatar
      Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net · dcfba949
      David S. Miller authored
      
      
      Jeff Kirsher says:
      
      ====================
      Intel Wired LAN Driver Updates
      
      This series contains updates to e1000, e1000e, igb, igbvf, ixgb, ixgbe,
      ixgbevf and i40evf.
      
      Mark fixes an issue with ixgbe and ixgbevf by adding a bit to indicate
      when workqueues have been initialized.  This permits the register read
      error handling from attempting to use them prior to that, which also
      generates warnings.  Checking for a detected removal after initializing
      the work queues allows the probe function to return an error without
      getting the workqueue involved.  Further, if the error_detected
      callback is entered before the workqueues are initialized, exit without
      recovery since the device initialization was so truncated.
      
      Francois Romieu provides several patches to all the drivers to remove
      the open coded skb_cow_head.
      
      Jakub Kicinski provides a fix for igb where last_rx_timestamp should be
      updated only when Rx time stamp is read.
      
      Mitch provides a fix for i40evf where a recent change broke the RSS LUT
      programming causing it to be programmed with all 0's.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dcfba949
    • Linus Torvalds's avatar
      Merge tag 'trace-3.15-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 0a7418f5
      Linus Torvalds authored
      Pull more tracing updates from Steven Rostedt:
       "This includes the final patch to clean up and fix the issue with the
        design of tracepoints and how a user could register a tracepoint and
        have that tracepoint not be activated but no error was shown.
      
        The design was for an out of tree module but broke in tree users.  The
        clean up was to remove the saving of the hash table of tracepoint
        names such that they can be enabled before they exist (enabling a
        module tracepoint before that module is loaded).  This added more
        complexity than needed.  The clean up was to remove that code and just
        enable tracepoints that exist or fail if they do not.
      
        This removed a lot of code as well as the complexity that it brought.
        As a side effect, instead of registering a tracepoint by its name, the
        tracepoint needs to be registered with the tracepoint descriptor.
        This removes having to duplicate the tracepoint names that are
        enabled.
      
        The second patch was added that simplified the way modules were
        searched for.
      
        This cleanup required changes that were in the 3.15 queue as well as
        some changes that were added late in the 3.14-rc cycle.  This final
        change waited till the two were merged in upstream and then the change
        was added and full tests were run.  Unfortunately, the test found some
        errors, but after it was already submitted to the for-next branch and
        not to be rebased.  Sparse errors were detected by Fengguang Wu's bot
        tests, and my internal tests discovered that the anonymous union
        initialization triggered a bug in older gcc compilers.  Luckily, there
        was a bugzilla for the gcc bug which gave a work around to the
        problem.  The third and fourth patch handled the sparse error and the
        gcc bug respectively.
      
        A final patch was tagged along to fix a missing documentation for the
        README file"
      
      * tag 'trace-3.15-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Add missing function triggers dump and cpudump to README
        tracing: Fix anonymous unions in struct ftrace_event_call
        tracepoint: Fix sparse warnings in tracepoint.c
        tracepoint: Simplify tracepoint module search
        tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints
      0a7418f5
    • Linus Torvalds's avatar
      Merge git://git.infradead.org/users/eparis/audit · 0b747172
      Linus Torvalds authored
      Pull audit updates from Eric Paris.
      
      * git://git.infradead.org/users/eparis/audit: (28 commits)
        AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC
        audit: renumber AUDIT_FEATURE_CHANGE into the 1300 range
        audit: do not cast audit_rule_data pointers pointlesly
        AUDIT: Allow login in non-init namespaces
        audit: define audit_is_compat in kernel internal header
        kernel: Use RCU_INIT_POINTER(x, NULL) in audit.c
        sched: declare pid_alive as inline
        audit: use uapi/linux/audit.h for AUDIT_ARCH declarations
        syscall_get_arch: remove useless function arguments
        audit: remove stray newline from audit_log_execve_info() audit_panic() call
        audit: remove stray newlines from audit_log_lost messages
        audit: include subject in login records
        audit: remove superfluous new- prefix in AUDIT_LOGIN messages
        audit: allow user processes to log from another PID namespace
        audit: anchor all pid references in the initial pid namespace
        audit: convert PPIDs to the inital PID namespace.
        pid: get pid_t ppid of task in init_pid_ns
        audit: rename the misleading audit_get_context() to audit_take_context()
        audit: Add generic compat syscall support
        audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL
        ...
      0b747172
    • Al Viro's avatar
      missing bits of "splice: fix racy pipe->buffers uses" · a786c06d
      Al Viro authored
      
      
      that commit has fixed only the parts of that mess in fs/splice.c itself;
      there had been more in several other ->splice_read() instances...
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      a786c06d
    • Al Viro's avatar
      cifs: fix the race in cifs_writev() · 19dfc1f5
      Al Viro authored
      
      
      O_APPEND handling there hadn't been completely fixed by Pavel's
      patch; it checks the right value, but it's racy - we can't really
      do that until i_mutex has been taken.
      
      Fix by switching to __generic_file_aio_write() (open-coding
      generic_file_aio_write(), actually) and pulling mutex_lock() above
      inode_size_read().
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      19dfc1f5
    • Al Viro's avatar
      ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure · eab87235
      Al Viro authored
      
      
      ceph_osdc_put_request(ERR_PTR(-error)) oopses.  What we want there
      is break, not goto out.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      eab87235
    • Daniel Borkmann's avatar
      pktgen: be friendly to LLTX devices · 0f2eea4b
      Daniel Borkmann authored
      Similarly to commit 43279500
      
       ("packet: respect devices with
      LLTX flag in direct xmit"), we can basically apply the very same
      to pktgen. This will help testing against LLTX devices such as
      dummy driver (or others), which only have a single netdevice txq
      and would otherwise require locking their txq from pktgen side
      while e.g. in dummy case, we would not need any locking. Fix this
      by making use of HARD_TX_{UN,}LOCK API, so that NETIF_F_LLTX will
      be respected.
      Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Cc: Eric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0f2eea4b