1. 21 Feb, 2015 17 commits
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · e20d3ef5
      Linus Torvalds authored
      Pull SCSI target updates from Nicholas Bellinger:
       "The highlights this round include:
      
         - Update vhost-scsi to support F_ANY_LAYOUT using mm/iov_iter.c
           logic, and signal VERSION_1 support (MST + Viro + nab)
      
         - Fix iscsi/iser-target to remove problematic active_ts_set usage
           (Gavin Guo)
      
         - Update iscsi/iser-target to support multi-sequence sendtargets
           (Sagi)
      
         - Fix original PR_APTPL_BUF_LEN 8k size limitation (Martin Svec)
      
         - Add missing WRITE_SAME end-of-device sanity check (Bart)
      
         - Check for LBA + sectors wrap-around in sbc_parse_cdb() (nab)
      
         - Other various minor SPC/SBC compliance fixes based upon Ronnie
           Sahlberg test suite (nab)"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (32 commits)
        target: Set LBPWS10 bit in Logical Block Provisioning EVPD
        target: Fail UNMAP when emulate_tpu=0
        target: Fail WRITE_SAME w/ UNMAP=1 when emulate_tpws=0
        target: Add sanity checks for DPO/FUA bit usage
        target: Perform PROTECT sanity checks for WRITE_SAME
        target: Fail I/O with PROTECT bit when protection is unsupported
        target: Check for LBA + sectors wrap-around in sbc_parse_cdb
        target: Add missing WRITE_SAME end-of-device sanity check
        iscsi-target: Avoid IN_LOGOUT failure case for iser-target
        target: Fix PR_APTPL_BUF_LEN buffer size limitation
        iscsi-target: Drop problematic active_ts_list usage
        iscsi/iser-target: Support multi-sequence sendtargets text response
        iser-target: Remove duplicate function names
        vhost/scsi: potential memory corruption
        vhost/scsi: Global tcm_vhost -> vhost_scsi rename
        vhost/scsi: Drop left-over scsi_tcq.h include
        vhost/scsi: Set VIRTIO_F_ANY_LAYOUT + VIRTIO_F_VERSION_1 feature bits
        vhost/scsi: Add ANY_LAYOUT support in vhost_scsi_handle_vq
        vhost/scsi: Add ANY_LAYOUT iov -> sgl mapping prerequisites
        vhost/scsi: Change vhost_scsi_map_to_sgl to accept iov ptr + len
        ...
      e20d3ef5
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 1acd2de5
      Linus Torvalds authored
      Pull more input updates from Dmitry Torokhov:
       "The second round of updates for the input subsystem.
      
        Updates to ALPS an bfin_roraty drivers and a couple oother fixups"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: psmouse - use IS_ENABLED instead of homegrown code
        Input: bfin_rotary - introduce open and close methods
        Input: bfin_rotary - convert to use managed resources
        Input: bfin_rotary - use generic IO functions
        Input: bfin_rotary - move pin lists into into platform data
        Input: bfin_rotary - move platform header to linux/platform_data
        Input: bfin_rotary - mark suspend and resume code as __maybe_unused
        Input: bfin_rotary - fix potential oops in interrupt handler
        Input: ALPS - move v7 packet info to Documentation and v6 packet info
        Input: ALPS - fix confusing comment in protocol data
        Input: ALPS - do not mix trackstick and external PS/2 mouse data
        Input: ALPS - fix trackstick detection on some Dell Latitudes
        Input: ALPS - consolidate setting protocol parameters
        Input: ALPS - split protocol data from model info
        Input: ALPS - make Rushmore a separate protocol
        Input: ALPS - renumber protocol numbers
        Input: adi - remove an unnecessary check
        Input: pxa27x_keypad - remove an unneeded NULL check
        Input: soc_button_array - use "Windows" key for "Home"
      1acd2de5
    • Linus Torvalds's avatar
      Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband · b5ccb078
      Linus Torvalds authored
      Pull InfiniBand/RDMA updates from Roland Dreier:
       - Re-enable on-demand paging changes with stable ABI
       - Fairly large set of ocrdma HW driver fixes
       - Some qib HW driver fixes
       - Other miscellaneous changes
      
      * tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (43 commits)
        IB/qib: Add blank line after declaration
        IB/qib: Fix checkpatch warnings
        IB/mlx5: Enable the ODP capability query verb
        IB/core: Add on demand paging caps to ib_uverbs_ex_query_device
        IB/core: Add support for extended query device caps
        RDMA/cxgb4: Don't hang threads forever waiting on WR replies
        RDMA/ocrdma: Fix off by one in ocrdma_query_gid()
        RDMA/ocrdma: Use unsigned for bit index
        RDMA/ocrdma: Help gcc generate better code for ocrdma_srq_toggle_bit
        RDMA/ocrdma: Update the ocrdma module version string
        RDMA/ocrdma: set vlan present bit for user AH
        RDMA/ocrdma: remove reference of ocrdma_dev out of ocrdma_qp structure
        RDMA/ocrdma: Add support for interrupt moderation
        RDMA/ocrdma: Honor return value of ocrdma_resolve_dmac
        RDMA/ocrdma: Allow expansion of the SQ CQEs via buddy CQ expansion of the QP
        RDMA/ocrdma: Discontinue support of RDMA-READ-WITH-INVALIDATE
        RDMA/ocrdma: Host crash on destroying device resources
        RDMA/ocrdma: Report correct state in ibv_query_qp
        RDMA/ocrdma: Debugfs enhancments for ocrdma driver
        RDMA/ocrdma: Report correct count of interrupt vectors while registering ocrdma device
        ...
      b5ccb078
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 29532455
      Linus Torvalds authored
      Pull i2c updates from Wolfram Sang:
       "Summary:
      
         - legacy PM code removed from the core, there were no users anymore
           (thanks to Lars-Peter Clausen)
      
         - new driver for Broadcom iProc
      
         - bigger driver updates for designware, rk3x, cadence, ocores
      
         - a bunch of smaller updates and bugfixes"
      
      * 'i2c/for-3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (31 commits)
        i2c: ocores: rework clk code to handle NULL cookie
        i2c: designware-baytrail: another fixup for proper Kconfig dependencies
        i2c: fix reference to functionality constants definition
        i2c: iproc: Add Broadcom iProc I2C Driver
        i2c: designware-pci: update Intel copyright line
        i2c: ocores: add common clock support
        i2c: hix5hd2: add COMPILE_TEST
        i2c: clarify comments about the dev_released completion
        i2c: ocores: fix clock-frequency binding usage
        i2c: tegra: Maintain CPU endianness
        i2c: designware-baytrail: use proper Kconfig dependencies
        i2c: designware: Do not calculate SCL timing parameters needlessly
        i2c: do not try to load modules for of-registered devices
        i2c: designware: Add Intel Baytrail PMIC I2C bus support
        i2c: designware: Add i2c bus locking support
        of: i2c: Add i2c-mux-idle-disconnect DT property to PCA954x mux driver
        i2c: designware: use {readl|writel}_relaxed instead of readl/writel
        i2c: designware-pci: no need to provide clk_khz
        i2c: designware-pci: remove Moorestown support
        i2c: imx: whitespace and checkpatch cleanup
        ...
      29532455
    • Linus Torvalds's avatar
      Merge tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux · 18a8d499
      Linus Torvalds authored
      Pull clock framework updates from Mike Turquette:
       "The clock framework changes contain the usual driver additions,
        enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
        devices.
      
        Additionally the framework core underwent a bit of surgery with two
        major changes:
      
         - The boundary between the clock core and clock providers (e.g clock
           drivers) is now more well defined with dedicated provider helper
           functions.  struct clk no longer maps 1:1 with the hardware clock
           but is a true per-user cookie which helps us tracker users of
           hardware clocks and debug bad behavior.
      
         - The addition of rate constraints for clocks.  Rate ranges are now
           supported which are analogous to the voltage ranges in the
           regulator framework.
      
        Unfortunately these changes to the core created some breakeage.  We
        think we fixed it all up but for this reason there are lots of last
        minute commits trying to undo the damage"
      
      * tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux: (113 commits)
        clk: Only recalculate the rate if needed
        Revert "clk: mxs: Fix invalid 32-bit access to frac registers"
        clk: qoriq: Add support for the platform PLL
        powerpc/corenet: Enable CLK_QORIQ
        clk: Replace explicit clk assignment with __clk_hw_set_clk
        clk: Add __clk_hw_set_clk helper function
        clk: Don't dereference parent clock if is NULL
        MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr
        clkdev: Always allocate a struct clk and call __clk_get() w/ CCF
        clk: shmobile: div6: Avoid division by zero in .round_rate()
        clk: mxs: Fix invalid 32-bit access to frac registers
        clk: omap: compile legacy omap3 clocks conditionally
        clkdev: Export clk_register_clkdev
        clk: Add rate constraints to clocks
        clk: remove clk-private.h
        pci: xgene: do not use clk-private.h
        arm: omap2+ remove dead clock code
        clk: Make clk API return per-user struct clk instances
        clk: tegra: Define PLLD_DSI and remove dsia(b)_mux
        clk: tegra: Add support for the Tegra132 CAR IP block
        ...
      18a8d499
    • Linus Torvalds's avatar
      Merge tag 'vfio-v3.20-rc1' of git://github.com/awilliam/linux-vfio · c189cb8e
      Linus Torvalds authored
      Pull VFIO updates from Alex Williamson:
      
       - IOMMU updates based on trace analysis
       - VFIO device request interface
      
      * tag 'vfio-v3.20-rc1' of git://github.com/awilliam/linux-vfio:
        vfio-pci: Add device request interface
        vfio-pci: Generalize setup of simple eventfds
        vfio: Add and use device request op for vfio bus drivers
        vfio: Tie IOMMU group reference to vfio group
        vfio: Add device tracking during unbind
        vfio/type1: Add conditional rescheduling
        vfio/type1: Chunk contiguous reserved/invalid page mappings
        vfio/type1: DMA unmap chunking
      c189cb8e
    • Linus Torvalds's avatar
      Merge tag 'sound-fix-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · a2a6937d
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Here are a few small fix patches for 3.20-rc1:
      
         - Quirks for Denon and Lifecam USB-audio devices and HD-audio on HP
           laptops
         - A long-time regression fix for HDSP eMADI
         - Add missing DRAIN_TRIGGER flag set for ASoC intel-sst
         - Trivial fixes for sequencer core and HD-audio Tegra, a LINE6
           cleanup"
      
      * tag 'sound-fix-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: usb: Fix support for Denon DA-300USB DAC (ID 154e:1003)
        ASoC: Intel: add SNDRV_PCM_INFO_DRAIN_TRIGGER flag
        ALSA: usb-audio: Don't attempt to get Lifecam HD-5000 sample rate
        ALSA: hda/tegra check correct return value from ioremap_resource
        ALSA: hdspm - Constrain periods to 2 on older cards
        ALSA: hda - enable mute led quirk for one more hp machine.
        ALSA: seq: potential out of bounds in do_control()
        ALSA: line6: Improve line6_read/write_data() interfaces
      a2a6937d
    • Linus Torvalds's avatar
      Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · f5e25f0d
      Linus Torvalds authored
      Pull thermal management fix from Zhang Rui:
       "One patch to fix a problem that all Exynos SoCs will break at boot
        time"
      
      * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        thermal: exynos: fix: Check if data->tmu_read callback is present before read
      f5e25f0d
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · d34696c2
      Linus Torvalds authored
      Pull s390 fixes from Martin Schwidefsky:
       "Two patches to save some memory if CONFIG_NR_CPUS is large, a changed
        default for the use of compare-and-delay, and a couple of bug fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/spinlock: disabled compare-and-delay by default
        s390/mm: align 64-bit PIE binaries to 4GB
        s390/cacheinfo: coding style changes
        s390/cacheinfo: fix shared cpu masks
        s390/smp: reduce size of struct pcpu
        s390/topology: convert cpu_topology array to per cpu variable
        s390/topology: delay initialization of topology cpu masks
        s390/vdso: fix clock_gettime for CLOCK_THREAD_CPUTIME_ID, -2 and -3
      d34696c2
    • Linus Torvalds's avatar
      Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f9677375
      Linus Torvalds authored
      Pull Intel Quark SoC support from Ingo Molnar:
       "This adds support for Intel Quark X1000 SoC boards, used in the low
        power 32-bit x86 Intel Galileo microcontroller board intended for the
        Arduino space.
      
        There's been some preparatory core x86 patches for Quark CPU quirks
        merged already, but this rounds it all up and adds Kconfig enablement.
        It's a clean hardware enablement addition tree at this point"
      
      * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/intel/quark: Fix simple_return.cocci warnings
        x86/intel/quark: Fix ptr_ret.cocci warnings
        x86/intel/quark: Add Intel Quark platform support
        x86/intel/quark: Add Isolated Memory Regions for Quark X1000
      f9677375
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f3c233d7
      Linus Torvalds authored
      Pull ntp fix from Ingo Molnar:
       "An adjtimex interface regression fix for 32-bit systems"
      
      [ A check that was added in a previous commit is really only a concern
        for 64bit systems, but was applied to both 32 and 64bit systems, which
        results in breaking 32bit systems.
      
        Thus the fix here is to make the check only apply to 64bit systems ]
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        ntp: Fixup adjtimex freq validation on 32-bit systems
      f3c233d7
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 10436cf8
      Linus Torvalds authored
      Pull locking fixes from Ingo Molnar:
       "Two fixes: the paravirt spin_unlock() corruption/crash fix, and an
        rtmutex NULL dereference crash fix"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/spinlocks/paravirt: Fix memory corruption on unlock
        locking/rtmutex: Avoid a NULL pointer dereference on deadlock
      10436cf8
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5fbe4c22
      Linus Torvalds authored
      Pull misc x86 fixes from Ingo Molnar:
       "This contains:
      
         - EFI fixes
         - a boot printout fix
         - ASLR/kASLR fixes
         - intel microcode driver fixes
         - other misc fixes
      
        Most of the linecount comes from an EFI revert"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm/ASLR: Avoid PAGE_SIZE redefinition for UML subarch
        x86/microcode/intel: Handle truncated microcode images more robustly
        x86/microcode/intel: Guard against stack overflow in the loader
        x86, mm/ASLR: Fix stack randomization on 64-bit systems
        x86/mm/init: Fix incorrect page size in init_memory_mapping() printks
        x86/mm/ASLR: Propagate base load address calculation
        Documentation/x86: Fix path in zero-page.txt
        x86/apic: Fix the devicetree build in certain configs
        Revert "efi/libstub: Call get_memory_map() to obtain map and desc sizes"
        x86/efi: Avoid triple faults during EFI mixed mode calls
      5fbe4c22
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e2defd02
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       "Thiscontains misc fixes: preempt_schedule_common() and io_schedule()
        recursion fixes, sched/dl fixes, a completion_done() revert, two
        sched/rt fixes and a comment update patch"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/rt: Avoid obvious configuration fail
        sched/autogroup: Fix failure to set cpu.rt_runtime_us
        sched/dl: Do update_rq_clock() in yield_task_dl()
        sched: Prevent recursion in io_schedule()
        sched/completion: Serialize completion_done() with complete()
        sched: Fix preempt_schedule_common() triggering tracing recursion
        sched/dl: Prevent enqueue of a sleeping task in dl_task_timer()
        sched: Make dl_task_time() use task_rq_lock()
        sched: Clarify ordering between task_rq_lock() and move_queued_task()
      e2defd02
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · b5aeca54
      Linus Torvalds authored
      Pull x86 uprobe/kprobe fixes from Ingo Molnar:
       "This contains two uprobes fixes, an uprobes comment update and a
        kprobes fix"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        kprobes/x86: Mark 2 bytes NOP as boostable
        uprobes/x86: Fix 2-byte opcode table
        uprobes/x86: Fix 1-byte opcode tables
        uprobes/x86: Add comment with insn opcodes, mnemonics and why we dont support them
      b5aeca54
    • Linus Torvalds's avatar
      Merge branches 'core-urgent-for-linus' and 'irq-urgent-for-linus' of... · 3f4d9925
      Linus Torvalds authored
      Merge branches 'core-urgent-for-linus' and 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
      
      Pull rcu fix and x86 irq fix from Ingo Molnar:
      
       - Fix a bug that caused an RCU warning splat.
      
       - Two x86 irq related fixes: a hotplug crash fix and an ACPI IRQ
         registry fix.
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        rcu: Clear need_qs flag to prevent splat
      
      * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/irq: Check for valid irq descriptor in check_irq_vectors_for_cpu_disable()
        x86/irq: Fix regression caused by commit b568b860
      3f4d9925
    • Linus Torvalds's avatar
      kernel: make READ_ONCE() valid on const arguments · dd369297
      Linus Torvalds authored
      
      
      The use of READ_ONCE() causes lots of warnings witht he pending paravirt
      spinlock fixes, because those ends up having passing a member to a
      'const' structure to READ_ONCE().
      
      There should certainly be nothing wrong with using READ_ONCE() with a
      const source, but the helper function __read_once_size() would cause
      warnings because it would drop the 'const' qualifier, but also because
      the destination would be marked 'const' too due to the use of 'typeof'.
      
      Use a union of types in READ_ONCE() to avoid this issue.
      
      Also make sure to use parenthesis around the macro arguments to avoid
      possible operator precedence issues.
      Tested-by: default avatarIngo Molnar <mingo@kernel.org>
      Cc: Christian Borntraeger <borntraeger@de.ibm.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dd369297
  2. 20 Feb, 2015 21 commits
  3. 19 Feb, 2015 2 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>
      e3a1f6ca
    • 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
        ...
      2b9fb532