1. 28 Feb, 2012 2 commits
  2. 25 Feb, 2012 4 commits
    • Linus Torvalds's avatar
      Linux 3.3-rc5 · 6b21d18e
      Linus Torvalds authored
      6b21d18e
    • Linus Torvalds's avatar
      Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging · 00b10ecf
      Linus Torvalds authored
      Couple of minor driver fixes.
      
      * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
        hwmon: (max34440) Fix resetting temperature history
        hwmon: (f75375s) Fix register write order when setting fans to full speed
        hwmon: (ads1015) Fix file leak in probe function
        hwmon: (max6639) Fix PPR register initialization to set both channels
        hwmon: (max6639) Fix FAN_FROM_REG calculation
      00b10ecf
    • Linus Torvalds's avatar
      Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild · 1e73fde5
      Linus Torvalds authored
      three kbuild fixes for 3.3:
       - make deb-pkg symlink race fix.
       - make coccicheck fix.
       - Dropping the check for modutils.  This is not a regression, but
         allows the module-init-tools replacement kmod work with the 3.3
         kernel.
      
      * 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
        coccicheck: change handling of C={1,2} when M= is set
        builddeb: Don't create files in /tmp with predictable names
        kbuild: do not check for ancient modutils tools
      1e73fde5
    • Ian Kent's avatar
      autofs: work around unhappy compat problem on x86-64 · a32744d4
      Ian Kent authored
      When the autofs protocol version 5 packet type was added in commit
      5c0a32fc ("autofs4: add new packet type for v5 communications"), it
      obvously tried quite hard to be word-size agnostic, and uses explicitly
      sized fields that are all correctly aligned.
      
      However, with the final "char name[NAME_MAX+1]" array at the end, the
      actual size of the structure ends up being not very well defined:
      because the struct isn't marked 'packed', doing a "sizeof()" on it will
      align the size of the struct up to the biggest alignment of the members
      it has.
      
      And despite all the members being the same, the alignment of them is
      different: a "__u64" has 4-byte alignment on x86-32, but native 8-byte
      alignment on x86-64.  And while 'NAME_MAX+1' ends up being a nice round
      number (256), the name[] array starts out a 4-byte aligned.
      
      End result: the "packed" size of the structure is 300 bytes: 4-byte, but
      not 8-byte aligned.
      
      As a result, despite all the fields being in the same place on all
      architectures, sizeof() will round up that size to 304 bytes on
      architectures that have 8-byte alignment for u64.
      
      Note that this is *not* a problem for 32-bit compat mode on POWER, since
      there __u64 is 8-byte aligned even in 32-bit mode.  But on x86, 32-bit
      and 64-bit alignment is different for 64-bit entities, and as a result
      the structure that has exactly the same layout has different sizes.
      
      So on x86-64, but no other architecture, we will just subtract 4 from
      the size of the structure when running in a compat task.  That way we
      will write the properly sized packet that user mode expects.
      
      Not pretty.  Sadly, this very subtle, and unnecessary, size difference
      has been encoded in user space that wants to read packets of *exactly*
      the right size, and will refuse to touch anything else.
      Reported-and-tested-by: default avatarThomas Meyer <thomas@m3y3r.de>
      Signed-off-by: default avatarIan Kent <raven@themaw.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a32744d4
  3. 24 Feb, 2012 16 commits
    • Linus Torvalds's avatar
      Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · b52b8002
      Linus Torvalds authored
      One InfiniBand/RDMA regression fix for 3.3:
      
       - mlx4 SR-IOV changes added static exported functions, which doesn't
         build on powerpc at least.  Fix from Doug Ledford for this.
      
      * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
        mlx4_core: Exported functions can't be static
      b52b8002
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 · 16bca1d5
      Linus Torvalds authored
      SCSI fixes on 20120224:
       "This is a set of assorted bug fixes for power management, mpt2sas,
        ipr, the rdac device handler and quite a big chunk for qla2xxx (plus a
        use after free of scsi_host in scsi_scan.c). "
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
        [SCSI] scsi_dh_rdac: Fix for unbalanced reference count
        [SCSI] scsi_pm: Fix bug in the SCSI power management handler
        [SCSI] scsi_scan: Fix 'Poison overwritten' warning caused by using freed 'shost'
        [SCSI] qla2xxx: Update version number to 8.03.07.13-k.
        [SCSI] qla2xxx: Proper detection of firmware abort error code for ISP82xx.
        [SCSI] qla2xxx: Remove resetting memory during device initialization for ISP82xx.
        [SCSI] qla2xxx: Complete mailbox command timedout to avoid initialization failures during next reset cycle.
        [SCSI] qla2xxx: Remove check for null fcport from host reset handler.
        [SCSI] qla2xxx: Correct out of bounds read of ISP2200 mailbox registers.
        [SCSI] qla2xxx: Remove errant clearing of MBX_INTERRUPT flag during CT-IOCB processing.
        [SCSI] qla2xxx: Clear options-flags while issuing stop-firmware mbx command.
        [SCSI] qla2xxx: Add an "is reset active" helper.
        [SCSI] qla2xxx: Add check for null fcport references in qla2xxx_queuecommand.
        [SCSI] qla2xxx: Propagate up abort failures.
        [SCSI] isci: Fix NULL ptr dereference when no firmware is being loaded
        [SCSI] ipr: fix eeh recovery for 64-bit adapters
        [SCSI] mpt2sas: Fix mismatch in mpt2sas_base_hard_reset_handler() mutex lock-unlock
      16bca1d5
    • Greg Dietsche's avatar
      coccicheck: change handling of C={1,2} when M= is set · 42f1c01b
      Greg Dietsche authored
      This patch reverts a portion of d0bc1fb4 so that coccicheck will
      work properly when C=1 or C=2.
      Reported-and-tested-by: default avatarBrice Goglin <Brice.Goglin@inria.fr>
      Signed-off-by: default avatarGreg Dietsche <Gregory.Dietsche@cuw.edu>
      Signed-off-by: default avatarJulia Lawall <Julia.Lawall@lip6.fr>
      Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
      42f1c01b
    • Linus Torvalds's avatar
      Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · e98092be
      Linus Torvalds authored
      * 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        [media] hdpvr: update picture controls to support firmware versions > 0.15
        [media] wl128x: fix build errors when GPIOLIB is not enabled
        [media] hdpvr: fix race conditon during start of streaming
        [media] omap3isp: Fix crash caused by subdevs now having a pointer to devnodes
        [media] imon: don't wedge hardware after early callbacks
      e98092be
    • Oleg Nesterov's avatar
      epoll: ep_unregister_pollwait() can use the freed pwq->whead · 971316f0
      Oleg Nesterov authored
      signalfd_cleanup() ensures that ->signalfd_wqh is not used, but
      this is not enough. eppoll_entry->whead still points to the memory
      we are going to free, ep_unregister_pollwait()->remove_wait_queue()
      is obviously unsafe.
      
      Change ep_poll_callback(POLLFREE) to set eppoll_entry->whead = NULL,
      change ep_unregister_pollwait() to check pwq->whead != NULL under
      rcu_read_lock() before remove_wait_queue(). We add the new helper,
      ep_remove_wait_queue(), for this.
      
      This works because sighand_cachep is SLAB_DESTROY_BY_RCU and because
      ->signalfd_wqh is initialized in sighand_ctor(), not in copy_sighand.
      ep_unregister_pollwait()->remove_wait_queue() can play with already
      freed and potentially reused ->sighand, but this is fine. This memory
      must have the valid ->signalfd_wqh until rcu_read_unlock().
      Reported-by: default avatarMaxime Bizon <mbizon@freebox.fr>
      Cc: <stable@kernel.org>
      Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      971316f0
    • Oleg Nesterov's avatar
      epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree() · d80e731e
      Oleg Nesterov authored
      This patch is intentionally incomplete to simplify the review.
      It ignores ep_unregister_pollwait() which plays with the same wqh.
      See the next change.
      
      epoll assumes that the EPOLL_CTL_ADD'ed file controls everything
      f_op->poll() needs. In particular it assumes that the wait queue
      can't go away until eventpoll_release(). This is not true in case
      of signalfd, the task which does EPOLL_CTL_ADD uses its ->sighand
      which is not connected to the file.
      
      This patch adds the special event, POLLFREE, currently only for
      epoll. It expects that init_poll_funcptr()'ed hook should do the
      necessary cleanup. Perhaps it should be defined as EPOLLFREE in
      eventpoll.
      
      __cleanup_sighand() is changed to do wake_up_poll(POLLFREE) if
      ->signalfd_wqh is not empty, we add the new signalfd_cleanup()
      helper.
      
      ep_poll_callback(POLLFREE) simply does list_del_init(task_list).
      This make this poll entry inconsistent, but we don't care. If you
      share epoll fd which contains our sigfd with another process you
      should blame yourself. signalfd is "really special". I simply do
      not know how we can define the "right" semantics if it used with
      epoll.
      
      The main problem is, epoll calls signalfd_poll() once to establish
      the connection with the wait queue, after that signalfd_poll(NULL)
      returns the different/inconsistent results depending on who does
      EPOLL_CTL_MOD/signalfd_read/etc. IOW: apart from sigmask, signalfd
      has nothing to do with the file, it works with the current thread.
      
      In short: this patch is the hack which tries to fix the symptoms.
      It also assumes that nobody can take tasklist_lock under epoll
      locks, this seems to be true.
      
      Note:
      
      	- we do not have wake_up_all_poll() but wake_up_poll()
      	  is fine, poll/epoll doesn't use WQ_FLAG_EXCLUSIVE.
      
      	- signalfd_cleanup() uses POLLHUP along with POLLFREE,
      	  we need a couple of simple changes in eventpoll.c to
      	  make sure it can't be "lost".
      Reported-by: default avatarMaxime Bizon <mbizon@freebox.fr>
      Cc: <stable@kernel.org>
      Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d80e731e
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 855a85f7
      Linus Torvalds authored
      Quoth Chris:
       "This is later than I wanted because I got backed up running through
        btrfs bugs from the Oracle QA teams.  But they are all bug fixes that
        we've queued and tested since rc1.
      
        Nothing in particular stands out, this just reflects bug fixing and QA
        done in parallel by all the btrfs developers.  The most user visible
        of these is:
      
          Btrfs: clear the extent uptodate bits during parent transid failures
      
        Because that helps deal with out of date drives (say an iscsi disk
        that has gone away and come back).  The old code wasn't always
        properly retrying the other mirror for this type of failure."
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (24 commits)
        Btrfs: fix compiler warnings on 32 bit systems
        Btrfs: increase the global block reserve estimates
        Btrfs: clear the extent uptodate bits during parent transid failures
        Btrfs: add extra sanity checks on the path names in btrfs_mksubvol
        Btrfs: make sure we update latest_bdev
        Btrfs: improve error handling for btrfs_insert_dir_item callers
        Btrfs: be less strict on finding next node in clear_extent_bit
        Btrfs: fix a bug on overcommit stuff
        Btrfs: kick out redundant stuff in convert_extent_bit
        Btrfs: skip states when they does not contain bits to clear
        Btrfs: check return value of lookup_extent_mapping() correctly
        Btrfs: fix deadlock on page lock when doing auto-defragment
        Btrfs: fix return value check of extent_io_ops
        btrfs: honor umask when creating subvol root
        btrfs: silence warning in raid array setup
        btrfs: fix structs where bitfields and spinlock/atomic share 8B word
        btrfs: delalloc for page dirtied out-of-band in fixup worker
        Btrfs: fix memory leak in load_free_space_cache()
        btrfs: don't check DUP chunks twice
        Btrfs: fix trim 0 bytes after a device delete
        ...
      855a85f7
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming · ee325324
      Linus Torvalds authored
      This is the arch/c6x part of commit 7c431851 ("Kbuild: Use dtc's -d
      (dependency) option") which was dropped because c6x had not yet been
      merged at the time.
      
      * tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
        Kbuild: Use dtc's -d (dependency) option
      ee325324
    • Kyle McMartin's avatar
      MAINTAINERS: drop me from PA-RISC maintenance · b38a03b8
      Kyle McMartin authored
      I don't even live in the same country as any of my PA-RISC hardware
      these days, so the odds of me touching the code are pretty low.
      (Also re-order things to ensure jejb gets CC'd since he's been the
      primary maintainer for the last few years.)
      Signed-off-by: default avatarKyle McMartin <kyle@mcmartin.ca>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b38a03b8
    • David Howells's avatar
      NOMMU: Don't need to clear vm_mm when deleting a VMA · b94cfaf6
      David Howells authored
      Don't clear vm_mm in a deleted VMA as it's unnecessary and might
      conceivably break the filesystem or driver VMA close routine.
      Reported-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b94cfaf6
    • David Howells's avatar
      NOMMU: Lock i_mmap_mutex for access to the VMA prio list · 918e556e
      David Howells authored
      Lock i_mmap_mutex for access to the VMA prio list to prevent concurrent
      access.  Currently, certain parts of the mmap handling are protected by
      the region mutex, but not all.
      Reported-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      cc: stable@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      918e556e
    • Linus Torvalds's avatar
      Merge tag 'rmobile-for-linus' of git://github.com/pmundt/linux-sh · 37e79cbf
      Linus Torvalds authored
      SH/R-Mobile fixes for 3.3-rc5
      
      * tag 'rmobile-for-linus' of git://github.com/pmundt/linux-sh:
        arch/arm/mach-shmobile/board-ag5evm.c: included linux/dma-mapping.h twice
        ARM: mach-shmobile: r8a7779 PFC IPSR4 fix
        ARM: mach-shmobile: sh73a0 PSTR 32-bit access fix
        ARM: mach-shmobile: add GPIO-to-IRQ translation to sh7372
        ARM: mach-shmobile: clock-sh73a0: add DSIxPHY clock support
        arm: fix compile failure in mach-shmobile/board-ag5evm.c
        ARM: mach-shmobile: mackerel: add ak4642 amixer settings on comment
        ARM: mach-shmobile: mackerel: use renesas_usbhs instead of r8a66597_hcd
        ARM: mach-shmobile: simplify MMCIF DMA configuration
        ARM: mach-shmobile: IRQ driven GPIO key support for Kota2
        ARM: mach-shmobile: sh73a0 IRQ sparse alloc fix
        ARM: mach-shmobile: sh73a0 PINT IRQ base fix
      37e79cbf
    • Linus Torvalds's avatar
      Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh · 0e69e084
      Linus Torvalds authored
      SuperH fixes for 3.3-rc5
      
      * tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
        sh: Fix sh2a build error for CONFIG_CACHE_WRITETHROUGH
        sh: modify a resource of sh_eth_giga1_resources in board-sh7757lcr
        arch/sh: remove references to cpu_*_map.
        sh: Fix typo in pci-sh7780.c
        sh: add platform_device for SPI1 in setup-sh7757
        sh: modify resource for SPI0 in setup-sh7757
        sh: se7724: fix compile breakage
        sh: clkfwk: bugfix: use clk_reparent() for div6 clocks
        sh: clock-sh7724: fixup sh_fsi clock settings
        sh: sh7757lcr: update to the new MMCIF DMA configuration
        sh: fix the sh_mmcif_plat_data in board-sh7757lcr
        video: pvr2fb: Fix up spurious section mismatch warnings.
        sh: Defer to asm-generic/device.h.
      0e69e084
    • Anton Vorontsov's avatar
      mm: memcg: Correct unregistring of events attached to the same eventfd · 371528ca
      Anton Vorontsov authored
      There is an issue when memcg unregisters events that were attached to
      the same eventfd:
      
      - On the first call mem_cgroup_usage_unregister_event() removes all
        events attached to a given eventfd, and if there were no events left,
        thresholds->primary would become NULL;
      
      - Since there were several events registered, cgroups core will call
        mem_cgroup_usage_unregister_event() again, but now kernel will oops,
        as the function doesn't expect that threshold->primary may be NULL.
      
      That's a good question whether mem_cgroup_usage_unregister_event()
      should actually remove all events in one go, but nowadays it can't
      do any better as cftype->unregister_event callback doesn't pass
      any private event-associated cookie. So, let's fix the issue by
      simply checking for threshold->primary.
      
      FWIW, w/o the patch the following oops may be observed:
      
       BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
       IP: [<ffffffff810be32c>] mem_cgroup_usage_unregister_event+0x9c/0x1f0
       Pid: 574, comm: kworker/0:2 Not tainted 3.3.0-rc4+ #9 Bochs Bochs
       RIP: 0010:[<ffffffff810be32c>]  [<ffffffff810be32c>] mem_cgroup_usage_unregister_event+0x9c/0x1f0
       RSP: 0018:ffff88001d0b9d60  EFLAGS: 00010246
       Process kworker/0:2 (pid: 574, threadinfo ffff88001d0b8000, task ffff88001de91cc0)
       Call Trace:
        [<ffffffff8107092b>] cgroup_event_remove+0x2b/0x60
        [<ffffffff8103db94>] process_one_work+0x174/0x450
        [<ffffffff8103e413>] worker_thread+0x123/0x2d0
      
      Cc: stable <stable@vger.kernel.org>
      Signed-off-by: default avatarAnton Vorontsov <anton.vorontsov@linaro.org>
      Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Kirill A. Shutemov <kirill@shutemov.name>
      Cc: Michal Hocko <mhocko@suse.cz>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      371528ca
    • Guenter Roeck's avatar
      hwmon: (max34440) Fix resetting temperature history · dc91ad8e
      Guenter Roeck authored
      Temperature history is reset by writing 0x8000 into the peak temperature
      register, not 0xffff.
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Acked-by: default avatarJean Delvare <khali@linux-fr.org>
      dc91ad8e
    • Chris Mason's avatar
      Btrfs: fix compiler warnings on 32 bit systems · e77266e4
      Chris Mason authored
      The enospc tracing code added some interesting uses of
      u64 pointer casts.
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      e77266e4
  4. 23 Feb, 2012 18 commits