1. 21 Feb, 2015 11 commits
  2. 20 Feb, 2015 15 commits
  3. 19 Feb, 2015 14 commits
    • David Vrabel's avatar
      x86: pte_protnone() and pmd_protnone() must check entry is not present · e3a1f6ca
      David Vrabel authored
      Since _PAGE_PROTNONE aliases _PAGE_GLOBAL it is only valid if
      _PAGE_PRESENT is clear.  Make pte_protnone() and pmd_protnone() check
      for this.
      This fixes a 64-bit Xen PV guest regression introduced by 8a0516ed
      ("mm: convert p[te|md]_numa users to p[te|md]_protnone_numa").  Any
      userspace process would endlessly fault.
      In a 64-bit PV guest, userspace page table entries have _PAGE_GLOBAL set
      by the hypervisor.  This meant that any fault on a present userspace
      entry (e.g., a write to a read-only mapping) would be misinterpreted as
      a NUMA hinting fault and the fault would not be correctly handled,
      resulting in the access endlessly faulting.
      Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
      Acked-by: default avatarMel Gorman <mgorman@suse.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 2b9fb532
      Linus Torvalds authored
      Pull btrfs updates from Chris Mason:
       "This pull is mostly cleanups and fixes:
         - The raid5/6 cleanups from Zhao Lei fixup some long standing warts
           in the code and add improvements on top of the scrubbing support
           from 3.19.
         - Josef has round one of our ENOSPC fixes coming from large btrfs
           clusters here at FB.
         - Dave Sterba continues a long series of cleanups (thanks Dave), and
           Filipe continues hammering on corner cases in fsync and others
        This all was held up a little trying to track down a use-after-free in
        btrfs raid5/6.  It's not clear yet if this is just made easier to
        trigger with this pull or if its a new bug from the raid5/6 cleanups.
        Dave Sterba is the only one to trigger it so far, but he has a
        consistent way to reproduce, so we'll get it nailed shortly"
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (68 commits)
        Btrfs: don't remove extents and xattrs when logging new names
        Btrfs: fix fsync data loss after adding hard link to inode
        Btrfs: fix BUG_ON in btrfs_orphan_add() when delete unused block group
        Btrfs: account for large extents with enospc
        Btrfs: don't set and clear delalloc for O_DIRECT writes
        Btrfs: only adjust outstanding_extents when we do a short write
        btrfs: Fix out-of-space bug
        Btrfs: scrub, fix sleep in atomic context
        Btrfs: fix scheduler warning when syncing log
        Btrfs: Remove unnecessary placeholder in btrfs_err_code
        btrfs: cleanup init for list in free-space-cache
        btrfs: delete chunk allocation attemp when setting block group ro
        btrfs: clear bio reference after submit_one_bio()
        Btrfs: fix scrub race leading to use-after-free
        Btrfs: add missing cleanup on sysfs init failure
        Btrfs: fix race between transaction commit and empty block group removal
        btrfs: add more checks to btrfs_read_sys_array
        btrfs: cleanup, rename a few variables in btrfs_read_sys_array
        btrfs: add checks for sys_chunk_array sizes
        btrfs: more superblock checks, lower bounds on devices and sectorsize/nodesize
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · 4533f6e2
      Linus Torvalds authored
      Pull Ceph changes from Sage Weil:
       "On the RBD side, there is a conversion to blk-mq from Christoph,
        several long-standing bug fixes from Ilya, and some cleanup from
        Rickard Strandqvist.
        On the CephFS side there is a long list of fixes from Zheng, including
        improved session handling, a few IO path fixes, some dcache management
        correctness fixes, and several blocking while !TASK_RUNNING fixes.
        The core code gets a few cleanups and Chaitanya has added support for
        TCP_NODELAY (which has been used on the server side for ages but we
        somehow missed on the kernel client).
        There is also an update to MAINTAINERS to fix up some email addresses
        and reflect that Ilya and Zheng are doing most of the maintenance for
        RBD and CephFS these days.  Do not be surprised to see a pull request
        come from one of them in the future if I am unavailable for some
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (27 commits)
        MAINTAINERS: update Ceph and RBD maintainers
        libceph: kfree() in put_osd() shouldn't depend on authorizer
        libceph: fix double __remove_osd() problem
        rbd: convert to blk-mq
        ceph: return error for traceless reply race
        ceph: fix dentry leaks
        ceph: re-send requests when MDS enters reconnecting stage
        ceph: show nocephx_require_signatures and notcp_nodelay options
        libceph: tcp_nodelay support
        rbd: do not treat standalone as flatten
        ceph: fix atomic_open snapdir
        ceph: properly mark empty directory as complete
        client: include kernel version in client metadata
        ceph: provide seperate {inode,file}_operations for snapdir
        ceph: fix request time stamp encoding
        ceph: fix reading inline data when i_size > PAGE_SIZE
        ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_close_sessions)
        ceph: avoid block operation when !TASK_RUNNING (ceph_get_caps)
        ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_sync)
        rbd: fix error paths in rbd_dev_refresh()
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · 89d3fa45
      Linus Torvalds authored
      Pull thermal managament updates from Zhang Rui:
         - Abstract the code and introduce helper functions for all int340x
           thermal drivers.  From: Srinivas Pandruvada.
         - Reorganize the ACPI LPAT table support code so that it can be
           shared for both ACPI PMIC driver and int340x thermal driver.
         - Add support for Braswell in intel_soc_dts thermal driver.
         - a couple of small fixes/cleanups for step_wise governor and int340x
           thermal driver"
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        Thermal/int340x_thermal: remove unused uuids.
        thermal: step_wise: spelling fixes
        thermal: int340x: fix sparse warning
        Thermal/int340x: LPAT conversion for temperature
        ACPI / PMIC: Use common LPAT table handling functions
        ACPI / LPAT: Common table processing functions
        thermal: Intel SoC DTS: Add Braswell support
        Thermal/int340x/int3402: Provide notification support
        Thermal/int340x/processor_thermal: Add thermal zone support
        Thermal/int340x/int3403: Use int340x thermal API
        Thermal/int340x/int3402: Use int340x thermal API
        Thermal/int340x: Add common thermal zone handler
    • Linus Torvalds's avatar
      Merge tag 'edac_fixes_for_3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp · 477ea116
      Linus Torvalds authored
      Pull two EDAC fixes from Borislav Petkov:
       - A fix to sb_edac for proper detection on SNB machines
       - A fix to amd64_edac to not explode on Numascale machines with more
         than 16 memory controllers, from Daniel J Blueman.
      * tag 'edac_fixes_for_3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
        EDAC, amd64_edac: Prevent OOPS with >16 memory controllers
        sb_edac: Fix detection on SNB machines
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v3.20-1' of... · 6ed3e57f
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v3.20-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
      Pull platform driver update from Darren Hart:
       "This includes a significant update to the toshiba_acpi driver,
        bringing it to feature parity with the Windows driver, followed by
        some needed cleanups.
        The other changes are mostly minor updates, quirks, sparse fixes, or
         - toshiba_acpi:
             Add support for missing features from the Windows driver, bump the
             sysfs version, and clean up the driver.
         - thinkpad_acpi:
             BIOS string versions, unhandled hkey events.
         - msamsung-laptop:
             Add native backlight quirk, enable better lid handling.
         - intel_scu_ipc:
             Read resources from PCI configuration
         - other:
             Fix sparse warnings, general cleanups"
      * tag 'platform-drivers-x86-v3.20-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (34 commits)
        toshiba_acpi: Cleanup GPL header
        toshiba_acpi: Cleanup comment blocks and capitalization
        toshiba_acpi: Make use of DEVICE_ATTR_{RO, RW} macros
        toshiba_acpi: Drop the toshiba_ prefix from sysfs function names
        toshiba_acpi: Move sysfs function and struct declarations further down
        Documentation/ABI: Add file describing the sysfs entries for toshiba_acpi
        toshiba_acpi: Clean file according to coding style
        toshiba_acpi: Bump version number to 0.21
        toshiba_acpi: Add support to enable/disable USB 3
        toshiba_acpi: Add support for Panel Power ON
        toshiba_acpi: Add support for Keyboard functions mode
        toshiba_acpi: Add fan entry to sysfs
        toshiba_acpi: Add version entry to sysfs
        thinkpad_acpi: support new BIOS version string pattern
        thinkpad_acpi: unhandled hkey event
        toshiba_acpi: Make toshiba_eco_mode_available more robust
        classmate-laptop: Fix sparse warning (0 as NULL)
        Sony-laptop: Fix sparse warning (make undeclared var static)
        thinkpad_acpi.c: Fix sparse warning (make undeclared var static)
        samsung-laptop.c: Prefer kstrtoint over single variable sscanf
    • Rajaneesh Acharya's avatar
      kgdb, docs: Fix <para> pdfdocs build errors · dd8f30cc
      Rajaneesh Acharya authored
      kgdb.pdf failed to build from 'make pdfdocs' giving errors such as:
      jade:... Documentation/DocBook/kgdb.xml:200:8:E:
      document type does not allow element "para" here; missing one of
      "footnote", "caution", "important", "note", "tip", "warning",
      "blockquote", "informalexample" start-tag
      Fixing minor <para> and <sect> issues allows kgdb.pdf to be generated
      under Fedora20.
      Originally submitted by rajaneesh.acharya@yahoo.com in 2011, discussed here:
      as patch:
       The following are the enhancements that removed the errors
       while issuing "make pdfdocs"
      [graham.whaley@intel.com: Improved commit message and ported to 3.18.1]
      Signed-off-by: default avatarGraham Whaley <graham.whaley@intel.com>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Colin Cross's avatar
      debug: prevent entering debug mode on panic/exception. · 5516fd7b
      Colin Cross authored
      On non-developer devices, kgdb prevents the device from rebooting
      after a panic.
      Incase of panics and exceptions, to allow the device to reboot, prevent
      entering debug mode to avoid getting stuck waiting for the user to
      interact with debugger.
      To avoid entering the debugger on panic/exception without any extra
      configuration, panic_timeout is being used which can be set via
      /proc/sys/kernel/panic at run time and CONFIG_PANIC_TIMEOUT sets the
      default value.
      Setting panic_timeout indicates that the user requested machine to
      perform unattended reboot after panic. We dont want to get stuck waiting
      for the user input incase of panic.
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: kgdb-bugreport@lists.sourceforge.net
      Cc: linux-kernel@vger.kernel.org
      Cc: Android Kernel Team <kernel-team@android.com>
      Cc: John Stultz <john.stultz@linaro.org>
      Cc: Sumit Semwal <sumit.semwal@linaro.org>
      Signed-off-by: default avatarColin Cross <ccross@android.com>
      [Kiran: Added context to commit message.
      panic_timeout is used instead of break_on_panic and
      break_on_exception to honor CONFIG_PANIC_TIMEOUT
      Modified the commit as per community feedback]
      Signed-off-by: default avatarKiran Raparthy <kiran.kumar@linaro.org>
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Daniel Thompson's avatar
      kdb: Const qualifier for kdb_getstr's prompt argument · 32d375f6
      Daniel Thompson authored
      All current callers of kdb_getstr() can pass constant pointers via the
      prompt argument. This patch adds a const qualification to make explicit
      the fact that this is safe.
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Daniel Thompson's avatar
      kdb: Provide forward search at more prompt · fb6daa75
      Daniel Thompson authored
      Currently kdb allows the output of comamnds to be filtered using the
      | grep feature. This is useful but does not permit the output emitted
      shortly after a string match to be examined without wading through the
      entire unfiltered output of the command. Such a feature is particularly
      useful to navigate function traces because these traces often have a
      useful trigger string *before* the point of interest.
      This patch reuses the existing filtering logic to introduce a simple
      forward search to kdb that can be triggered from the more prompt.
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Daniel Thompson's avatar
      kdb: Fix a prompt management bug when using | grep · ab08e464
      Daniel Thompson authored
      Currently when the "| grep" feature is used to filter the output of a
      command then the prompt is not displayed for the subsequent command.
      Likewise any characters typed by the user are also not echoed to the
      display. This rather disconcerting problem eventually corrects itself
      when the user presses Enter and the kdb_grepping_flag is cleared as
      kdb_parse() tries to make sense of whatever they typed.
      This patch resolves the problem by moving the clearing of this flag
      from the middle of command processing to the beginning.
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Daniel Thompson's avatar
      kdb: Remove stack dump when entering kgdb due to NMI · 54543881
      Daniel Thompson authored
      Issuing a stack dump feels ergonomically wrong when entering due to NMI.
      Entering due to NMI is normally a reaction to a user request, either the
      NMI button on a server or a "magic knock" on a UART. Therefore the
      backtrace behaviour on entry due to NMI should be like SysRq-g (no stack
      dump) rather than like oops.
      Note also that the stack dump does not offer any information that
      cannot be trivial retrieved using the 'bt' command.
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Daniel Thompson's avatar
      kdb: Avoid printing KERN_ levels to consoles · f7d4ca8b
      Daniel Thompson authored
      Currently when kdb traps printk messages then the raw log level prefix
      (consisting of '\001' followed by a numeral) does not get stripped off
      before the message is issued to the various I/O handlers supported by
      kdb. This causes annoying visual noise as well as causing problems
      grepping for ^. It is also a change of behaviour compared to normal usage
      of printk() usage. For example <SysRq>-h ends up with different output to
      that of kdb's "sr h".
      This patch addresses the problem by stripping log levels from messages
      before they are issued to the I/O handlers. printk() which can also
      act as an i/o handler in some cases is special cased; if the caller
      provided a log level then the prefix will be preserved when sent to
      The addition of non-printable characters to the output of kdb commands is a
      regression, albeit and extremely elderly one, introduced by commit
       ("printk: convert the format for KERN_<LEVEL> to a 2 byte
      pattern"). Note also that this patch does *not* restore the original
      behaviour from v3.5. Instead it makes printk() from within a kdb command
      display the message without any prefix (i.e. like printk() normally does).
      Signed-off-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
      Cc: Joe Perches <joe@perches.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
    • Jason Wessel's avatar
      kdb: Fix off by one error in kdb_cpu() · df0036d1
      Jason Wessel authored
      There was a follow on replacement patch against the prior
      "kgdb: Timeout if secondary CPUs ignore the roundup".
      See: https://lkml.org/lkml/2015/1/7/442
      This patch is the delta vs the patch that was committed upstream:
        * Fix an off-by-one error in kdb_cpu().
        * Replace NR_CPUS with CONFIG_NR_CPUS to tell checkpatch that we
          really want a static limit.
        * Removed the "KGDB: " prefix from the pr_crit() in debug_core.c
          (kgdb-next contains a patch which introduced pr_fmt() to this file
          to the tag will now be applied automatically).
      Cc: Daniel Thompson <daniel.thompson@linaro.org>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>