1. 07 Oct, 2016 19 commits
  2. 06 Oct, 2016 21 commits
    • Linus Torvalds's avatar
      Merge tag 'for-f2fs-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs · 4c1fad64
      Linus Torvalds authored
      Pull f2fs updates from Jaegeuk Kim:
       "In this round, we've investigated how f2fs deals with errors given by
        our fault injection facility. With this, we could fix several corner
        cases. And, in order to improve the performance, we set inline_dentry
        by default and enhance the exisiting discard issue flow. In addition,
        we added f2fs_migrate_page for better memory management.
      
        Enhancements:
         - set inline_dentry by default
         - improve discard issue flow
         - add more fault injection cases in f2fs
         - allow block preallocation for encrypted files
         - introduce migrate_page callback function
         - avoid truncating the next direct node block at every checkpoint
      
        Bug fixes:
         - set page flag correctly between write_begin and write_end
         - missing error handling cases detected by fault injection
         - preallocate blocks regarding to 4KB alignement correctly
         - dentry and filename handling of encryption
         - lost xattrs of directories"
      
      * tag 'for-f2fs-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (69 commits)
        f2fs: introduce update_ckpt_flags to clean up
        f2fs: don't submit irrelevant page
        f2fs: fix to commit bio cache after flushing node pages
        f2fs: introduce get_checkpoint_version for cleanup
        f2fs: remove dead variable
        f2fs: remove redundant io plug
        f2fs: support checkpoint error injection
        f2fs: fix to recover old fault injection config in ->remount_fs
        f2fs: do fault injection initialization in default_options
        f2fs: remove redundant value definition
        f2fs: support configuring fault injection per superblock
        f2fs: adjust display format of segment bit
        f2fs: remove dirty inode pages in error path
        f2fs: do not unnecessarily null-terminate encrypted symlink data
        f2fs: handle errors during recover_orphan_inodes
        f2fs: avoid gc in cp_error case
        f2fs: should put_page for summary page
        f2fs: assign return value in f2fs_gc
        f2fs: add customized migrate_page callback
        f2fs: introduce cp_lock to protect updating of ckpt_flags
        ...
      4c1fad64
    • Linus Torvalds's avatar
      Merge tag 'pstore-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · 0fb3ca44
      Linus Torvalds authored
      Pull pstore updates from Kees Cook:
      
       - Fix bug in module unloading
      
       - Switch to always using spinlock over cmpxchg
      
       - Explicitly define pstore backend's supported modes
      
       - Remove bounce buffer from pmsg
      
       - Switch to using memcpy_to/fromio()
      
       - Error checking improvements
      
      * tag 'pstore-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        ramoops: move spin_lock_init after kmalloc error checking
        pstore/ram: Use memcpy_fromio() to save old buffer
        pstore/ram: Use memcpy_toio instead of memcpy
        pstore/pmsg: drop bounce buffer
        pstore/ram: Set pstore flags dynamically
        pstore: Split pstore fragile flags
        pstore/core: drop cmpxchg based updates
        pstore/ramoops: fixup driver removal
      0fb3ca44
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux · 3940ee36
      Linus Torvalds authored
      Pull orangefs updates from Mike Marshall:
       "Miscellaneous improvements:
         - clean up debugfs globals
         - remove dead code in sysfs
         - reorganize duplicated sysfs attribute structs
         - consolidate sysfs show and store functions
         - remove duplicated sysfs_ops structures
         - describe organization of sysfs
         - make devreq_mutex static
         - g_orangefs_stats -> orangefs_stats for consistency
         - rename most remaining global variables
      
        Feature negotiation:
         - enable Orangefs userspace and kernel module to negotiate mutually
           supported features"
      
      * tag 'for-linus-4.9-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
        Revert "orangefs: bump minimum userspace version"
        orangefs: bump minimum userspace version
        orangefs: rename most remaining global variables
        orangefs: g_orangefs_stats -> orangefs_stats for consistency
        orangefs: make devreq_mutex static
        orangefs: describe organization of sysfs
        orangefs: remove duplicated sysfs_ops structures
        orangefs: consolidate sysfs show and store functions
        orangefs: reorganize duplicated sysfs attribute structs
        orangefs: remove dead code in sysfs
        orangefs: clean up debugfs globals
        orangefs: do not allow client readahead cache without feature bit
        orangefs: add features op
        orangefs: record userspace version for feature compatbility
        orangefs: add readahead count and size to sysfs
        orangefs: re-add flush_racache from out-of-tree
        orangefs: turn param response value into union
        orangefs: add missing param request ops
        orangefs: rename remaining bits of mmap readahead cache
      3940ee36
    • Linus Torvalds's avatar
      Merge tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 95107b30
      Linus Torvalds authored
      Pull tracing updates from Steven Rostedt:
       "This release cycle is rather small.  Just a few fixes to tracing.
      
        The big change is the addition of the hwlat tracer. It not only
        detects SMIs, but also other latency that's caused by the hardware. I
        have detected some latency from large boxes having bus contention"
      
      * tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Call traceoff trigger after event is recorded
        ftrace/scripts: Add helper script to bisect function tracing problem functions
        tracing: Have max_latency be defined for HWLAT_TRACER as well
        tracing: Add NMI tracing in hwlat detector
        tracing: Have hwlat trace migrate across tracing_cpumask CPUs
        tracing: Add documentation for hwlat_detector tracer
        tracing: Added hardware latency tracer
        ftrace: Access ret_stack->subtime only in the function profiler
        function_graph: Handle TRACE_BPUTS in print_graph_comment
        tracing/uprobe: Drop isdigit() check in create_trace_uprobe
      95107b30
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.9-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · 541efb76
      Linus Torvalds authored
      Pull xen updates from David Vrabel:
       "xen features and fixes for 4.9:
      
         - switch to new CPU hotplug mechanism
      
         - support driver_override in pciback
      
         - require vector callback for HVM guests (the alternate mechanism via
           the platform device has been broken for ages)"
      
      * tag 'for-linus-4.9-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen/x86: Update topology map for PV VCPUs
        xen/x86: Initialize per_cpu(xen_vcpu, 0) a little earlier
        xen/pciback: support driver_override
        xen/pciback: avoid multiple entries in slot list
        xen/pciback: simplify pcistub device handling
        xen: Remove event channel notification through Xen PCI platform device
        xen/events: Convert to hotplug state machine
        xen/x86: Convert to hotplug state machine
        x86/xen: add missing \n at end of printk warning message
        xen/grant-table: Use kmalloc_array() in arch_gnttab_valloc()
        xen: Make VPMU init message look less scary
        xen: rename xen_pmu_init() in sys-hypervisor.c
        hotplug: Prevent alloc/free of irq descriptors during cpu up/down (again)
        xen/x86: Move irq allocation from Xen smp_op.cpu_up()
      541efb76
    • Linus Torvalds's avatar
      Merge tag 'kvm-4.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 6218590b
      Linus Torvalds authored
      Pull KVM updates from Radim Krčmář:
       "All architectures:
         - move `make kvmconfig` stubs from x86
         - use 64 bits for debugfs stats
      
        ARM:
         - Important fixes for not using an in-kernel irqchip
         - handle SError exceptions and present them to guests if appropriate
         - proxying of GICV access at EL2 if guest mappings are unsafe
         - GICv3 on AArch32 on ARMv8
         - preparations for GICv3 save/restore, including ABI docs
         - cleanups and a bit of optimizations
      
        MIPS:
         - A couple of fixes in preparation for supporting MIPS EVA host
           kernels
         - MIPS SMP host & TLB invalidation fixes
      
        PPC:
         - Fix the bug which caused guests to falsely report lockups
         - other minor fixes
         - a small optimization
      
        s390:
         - Lazy enablement of runtime instrumentation
         - up to 255 CPUs for nested guests
         - rework of machine check deliver
         - cleanups and fixes
      
        x86:
         - IOMMU part of AMD's AVIC for vmexit-less interrupt delivery
         - Hyper-V TSC page
         - per-vcpu tsc_offset in debugfs
         - accelerated INS/OUTS in nVMX
         - cleanups and fixes"
      
      * tag 'kvm-4.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (140 commits)
        KVM: MIPS: Drop dubious EntryHi optimisation
        KVM: MIPS: Invalidate TLB by regenerating ASIDs
        KVM: MIPS: Split kernel/user ASID regeneration
        KVM: MIPS: Drop other CPU ASIDs on guest MMU changes
        KVM: arm/arm64: vgic: Don't flush/sync without a working vgic
        KVM: arm64: Require in-kernel irqchip for PMU support
        KVM: PPC: Book3s PR: Allow access to unprivileged MMCR2 register
        KVM: PPC: Book3S PR: Support 64kB page size on POWER8E and POWER8NVL
        KVM: PPC: Book3S: Remove duplicate setting of the B field in tlbie
        KVM: PPC: BookE: Fix a sanity check
        KVM: PPC: Book3S HV: Take out virtual core piggybacking code
        KVM: PPC: Book3S: Treat VTB as a per-subcore register, not per-thread
        ARM: gic-v3: Work around definition of gic_write_bpr1
        KVM: nVMX: Fix the NMI IDT-vectoring handling
        KVM: VMX: Enable MSR-BASED TPR shadow even if APICv is inactive
        KVM: nVMX: Fix reload apic access page warning
        kvmconfig: add virtio-gpu to config fragment
        config: move x86 kvm_guest.config to a common location
        arm64: KVM: Remove duplicating init code for setting VMID
        ARM: KVM: Support vgic-v3
        ...
      6218590b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace · 14986a34
      Linus Torvalds authored
      Pull namespace updates from Eric Biederman:
       "This set of changes is a number of smaller things that have been
        overlooked in other development cycles focused on more fundamental
        change. The devpts changes are small things that were a distraction
        until we managed to kill off DEVPTS_MULTPLE_INSTANCES. There is an
        trivial regression fix to autofs for the unprivileged mount changes
        that went in last cycle. A pair of ioctls has been added by Andrey
        Vagin making it is possible to discover the relationships between
        namespaces when referring to them through file descriptors.
      
        The big user visible change is starting to add simple resource limits
        to catch programs that misbehave. With namespaces in general and user
        namespaces in particular allowing users to use more kinds of
        resources, it has become important to have something to limit errant
        programs. Because the purpose of these limits is to catch errant
        programs the code needs to be inexpensive to use as it always on, and
        the default limits need to be high enough that well behaved programs
        on well behaved systems don't encounter them.
      
        To this end, after some review I have implemented per user per user
        namespace limits, and use them to limit the number of namespaces. The
        limits being per user mean that one user can not exhause the limits of
        another user. The limits being per user namespace allow contexts where
        the limit is 0 and security conscious folks can remove from their
        threat anlysis the code used to manage namespaces (as they have
        historically done as it root only). At the same time the limits being
        per user namespace allow other parts of the system to use namespaces.
      
        Namespaces are increasingly being used in application sand boxing
        scenarios so an all or nothing disable for the entire system for the
        security conscious folks makes increasing use of these sandboxes
        impossible.
      
        There is also added a limit on the maximum number of mounts present in
        a single mount namespace. It is nontrivial to guess what a reasonable
        system wide limit on the number of mount structure in the kernel would
        be, especially as it various based on how a system is using
        containers. A limit on the number of mounts in a mount namespace
        however is much easier to understand and set. In most cases in
        practice only about 1000 mounts are used. Given that some autofs
        scenarious have the potential to be 30,000 to 50,000 mounts I have set
        the default limit for the number of mounts at 100,000 which is well
        above every known set of users but low enough that the mount hash
        tables don't degrade unreaonsably.
      
        These limits are a start. I expect this estabilishes a pattern that
        other limits for resources that namespaces use will follow. There has
        been interest in making inotify event limits per user per user
        namespace as well as interest expressed in making details about what
        is going on in the kernel more visible"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (28 commits)
        autofs:  Fix automounts by using current_real_cred()->uid
        mnt: Add a per mount namespace limit on the number of mounts
        netns: move {inc,dec}_net_namespaces into #ifdef
        nsfs: Simplify __ns_get_path
        tools/testing: add a test to check nsfs ioctl-s
        nsfs: add ioctl to get a parent namespace
        nsfs: add ioctl to get an owning user namespace for ns file descriptor
        kernel: add a helper to get an owning user namespace for a namespace
        devpts: Change the owner of /dev/pts/ptmx to the mounter of /dev/pts
        devpts: Remove sync_filesystems
        devpts: Make devpts_kill_sb safe if fsi is NULL
        devpts: Simplify devpts_mount by using mount_nodev
        devpts: Move the creation of /dev/pts/ptmx into fill_super
        devpts: Move parse_mount_options into fill_super
        userns: When the per user per user namespace limit is reached return ENOSPC
        userns; Document per user per user namespace limits.
        mntns: Add a limit on the number of mount namespaces.
        netns: Add a limit on the number of net namespaces
        cgroupns: Add a limit on the number of cgroup namespaces
        ipcns: Add a  limit on the number of ipc namespaces
        ...
      14986a34
    • Linus Torvalds's avatar
      Merge tag 'xfs-for-linus-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs · 8d370595
      Linus Torvalds authored
      Pull xfs and iomap updates from Dave Chinner:
       "The main things in this update are the iomap-based DAX infrastructure,
        an XFS delalloc rework, and a chunk of fixes to how log recovery
        schedules writeback to prevent spurious corruption detections when
        recovery of certain items was not required.
      
        The other main chunk of code is some preparation for the upcoming
        reflink functionality. Most of it is generic and cleanups that stand
        alone, but they were ready and reviewed so are in this pull request.
      
        Speaking of reflink, I'm currently planning to send you another pull
        request next week containing all the new reflink functionality. I'm
        working through a similar process to the last cycle, where I sent the
        reverse mapping code in a separate request because of how large it
        was. The reflink code merge is even bigger than reverse mapping, so
        I'll be doing the same thing again....
      
        Summary for this update:
      
         - change of XFS mailing list to linux-xfs@vger.kernel.org
      
         - iomap-based DAX infrastructure w/ XFS and ext2 support
      
         - small iomap fixes and additions
      
         - more efficient XFS delayed allocation infrastructure based on iomap
      
         - a rework of log recovery writeback scheduling to ensure we don't
           fail recovery when trying to replay items that are already on disk
      
         - some preparation patches for upcoming reflink support
      
         - configurable error handling fixes and documentation
      
         - aio access time update race fixes for XFS and
           generic_file_read_iter"
      
      * tag 'xfs-for-linus-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (40 commits)
        fs: update atime before I/O in generic_file_read_iter
        xfs: update atime before I/O in xfs_file_dio_aio_read
        ext2: fix possible integer truncation in ext2_iomap_begin
        xfs: log recovery tracepoints to track current lsn and buffer submission
        xfs: update metadata LSN in buffers during log recovery
        xfs: don't warn on buffers not being recovered due to LSN
        xfs: pass current lsn to log recovery buffer validation
        xfs: rework log recovery to submit buffers on LSN boundaries
        xfs: quiesce the filesystem after recovery on readonly mount
        xfs: remote attribute blocks aren't really userdata
        ext2: use iomap to implement DAX
        ext2: stop passing buffer_head to ext2_get_blocks
        xfs: use iomap to implement DAX
        xfs: refactor xfs_setfilesize
        xfs: take the ilock shared if possible in xfs_file_iomap_begin
        xfs: fix locking for DAX writes
        dax: provide an iomap based fault handler
        dax: provide an iomap based dax read/write path
        dax: don't pass buffer_head to copy_user_dax
        dax: don't pass buffer_head to dax_insert_mapping
        ...
      8d370595
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · d230ec72
      Linus Torvalds authored
      Pull networking fixups from David Miller:
       "Here are the build and merge fixups for the networking stuff"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        phy: micrel.c: Enable ksz9031 energy-detect power-down mode
        netfilter: merge fixup for "nf_tables_netdev: remove redundant ip_hdr assignment"
        netfilter: nft_limit: fix divided by zero panic
        netfilter: fix namespace handling in nf_log_proc_dostring
        netfilter: xt_hashlimit: Fix link error in 32bit arch because of 64bit division
        netfilter: accommodate different kconfig in nf_set_hooks_head
        netfilter: Fix potential null pointer dereference
      d230ec72
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · f84d9fa8
      Linus Torvalds authored
      Pull sparc updates from David Miller:
       "Besides some cleanups the major thing here is supporting relaxed
        ordering PCIe transactions on newer sparc64 machines, from Chris
        Hyser"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc: fixing ident and beautifying code
        sparc64: Enable setting "relaxed ordering" in IOMMU mappings
        sparc64: Enable PCI IOMMU version 2 API
        sparc: migrate exception table users off module.h and onto extable.h
      f84d9fa8
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm · 82fa407d
      Linus Torvalds authored
      Pull ARM updates from Russell King:
      
       - Correct ARMs dma-mapping to use the correct printk format strings.
      
       - Avoid defining OBJCOPYFLAGS globally which upsets lkdtm rodata
         testing.
      
       - Cleanups to ARMs asm/memory.h include.
      
       - L2 cache cleanups.
      
       - Allow flat nommu binaries to be executed on ARM MMU systems.
      
       - Kernel hardening - add more read-only after init annotations,
         including making some kernel vdso variables const.
      
       - Ensure AMBA primecell clocks are appropriately defaulted.
      
       - ARM breakpoint cleanup.
      
       - Various StrongARM 11x0 and companion chip (SA1111) updates to bring
         this legacy platform to use more modern APIs for (eg) GPIOs and
         interrupts, which will allow us in the future to reduce some of the
         board-level driver clutter and elimate function callbacks into board
         code via platform data. There still appears to be interest in these
         platforms!
      
       - Remove the now redundant secure_flush_area() API.
      
       - Module PLT relocation optimisations. Ard says: This series of 4
         patches optimizes the ARM PLT generation code that is invoked at
         module load time, to get rid of the O(n^2) algorithm that results in
         pathological load times of 10 seconds or more for large modules on
         certain STB platforms.
      
       - ARMv7M cache maintanence support.
      
       - L2 cache PMU support
      
      * 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (35 commits)
        ARM: sa1111: provide to_sa1111_device() macro
        ARM: sa1111: add sa1111_get_irq()
        ARM: sa1111: clean up duplication in IRQ chip implementation
        ARM: sa1111: implement a gpio_chip for SA1111 GPIOs
        ARM: sa1111: move irq cleanup to separate function
        ARM: sa1111: use devm_clk_get()
        ARM: sa1111: use devm_kzalloc()
        ARM: sa1111: ensure we only touch RAB bus type devices when removing
        ARM: 8611/1: l2x0: add PMU support
        ARM: 8610/1: V7M: Add dsb before jumping in handler mode
        ARM: 8609/1: V7M: Add support for the Cortex-M7 processor
        ARM: 8608/1: V7M: Indirect proc_info construction for V7M CPUs
        ARM: 8607/1: V7M: Wire up caches for V7M processors with cache support.
        ARM: 8606/1: V7M: introduce cache operations
        ARM: 8605/1: V7M: fix notrace variant of save_and_disable_irqs
        ARM: 8604/1: V7M: Add support for reading the CTR with read_cpuid_cachetype()
        ARM: 8603/1: V7M: Add addresses for mem-mapped V7M cache operations
        ARM: 8602/1: factor out CSSELR/CCSIDR operations that use cp15 directly
        ARM: kernel: avoid brute force search on PLT generation
        ARM: kernel: sort relocation sections before allocating PLTs
        ...
      82fa407d
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm · c7f5d36a
      Linus Torvalds authored
      Pull ARM fix from Russell King:
       "A 5% error in delay calculation was introduced during the last merge
        window, which had gone un-noticed until yesterday"
      
      * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
        ARM: fix delays
      c7f5d36a
    • Boris Ostrovsky's avatar
      xen/x86: Update topology map for PV VCPUs · a6a198bc
      Boris Ostrovsky authored
      Early during boot topology_update_package_map() computes
      logical_pkg_ids for all present processors.
      
      Later, when processors are brought up, identify_cpu() updates
      these values based on phys_pkg_id which is a function of
      initial_apicid. On PV guests the latter may point to a
      non-existing node, causing logical_pkg_ids to be set to -1.
      
      Intel's RAPL uses logical_pkg_id (as topology_logical_package_id())
      to index its arrays and therefore in this case will point to index
      65535 (since logical_pkg_id is a u16). This could lead to either a
      crash or may actually access random memory location.
      
      As a workaround, we recompute topology during CPU bringup to reset
      logical_pkg_id to a valid value.
      
      (The reason for initial_apicid being bogus is because it is
      initial_apicid of the processor from which the guest is launched.
      This value is CPUID(1).EBX[31:24])
      Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
      a6a198bc
    • Russell King's avatar
      Merge branch 'devel-stable' into for-linus · 81a63001
      Russell King authored
      81a63001
    • Russell King's avatar
      301a36fa
    • Russell King's avatar
      ARM: fix delays · fb833b1f
      Russell King authored
      Commit 215e362d ("ARM: 8306/1: loop_udelay: remove bogomips value
      limitation") tried to increase the bogomips limitation, but in doing
      so messed up udelay such that it always gives about a 5% error in the
      delay, even if we use a timer.
      
      The calculation is:
      
      	loops = UDELAY_MULT * us_delay * ticks_per_jiffy >> UDELAY_SHIFT
      
      Originally, UDELAY_MULT was ((UL(2199023) * HZ) >> 11) and UDELAY_SHIFT
      30.  Assuming HZ=100, us_delay of 1000 and ticks_per_jiffy of 1660000
      (eg, 166MHz timer, 1ms delay) this would calculate:
      
      	((UL(2199023) * HZ) >> 11) * 1000 * 1660000 >> 30
      		=> 165999
      
      With the new values of 2047 * HZ + 483648 * HZ / 1000000 and 31, we get:
      
      	(2047 * HZ + 483648 * HZ / 1000000) * 1000 * 1660000 >> 31
      		=> 158269
      
      which is incorrect.  This is due to a typo - correcting it gives:
      
      	(2147 * HZ + 483648 * HZ / 1000000) * 1000 * 1660000 >> 31
      		=> 165999
      
      i.o.w, the original value.
      
      Fixes: 215e362d ("ARM: 8306/1: loop_udelay: remove bogomips value limitation")
      Cc: <stable@vger.kernel.org>
      Reviewed-by: default avatarNicolas Pitre <nico@linaro.org>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      fb833b1f
    • netmonk@netmonk.org's avatar
      sparc: fixing ident and beautifying code · 98e98eb6
      netmonk@netmonk.org authored
      Good evening,
      
      Following LinuxCodingStyle documentation and with the help of Sam, fixed
      severals identation issues in the code, and few others cosmetic changes
      
      And last and i hope least fixing my name :)
      
      Signed-off-by : Dominique Carrel <netmonk@netmonk.org>
      Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      98e98eb6
    • David S. Miller's avatar
      Merge branch 'sparc-pcie-perf' · 27f145e7
      David S. Miller authored
      Chris Hyser says:
      
      ====================
      sparc64: PCIe performance enhancements
      
      Ver 2 is redone for 4.8 where commit 00085f1e
      changed DMA attributes from struct pointer to unsigned long.
      
      This set of patches initiates a series of PCIe performance enhancement patch
      submittals.
      
      Patch 1/2 enables version 2 of the SPARC sun4v IOMMU I/O address translation
      services need for subsequent enhancements.
      
      Patch 2/2 allows drivers to specify DMA_ATTR_WEAK_ORDERING via DMA attributes
      to the SPARC DMA mapping routines enabling "relaxed ordering" for the buffer
      being mapped.
      
      [Still relevant write-up]
      PCI-Express Relaxed Ordering and the Sun SPARC Enterprise M-class Servers
      https://blogs.oracle.com/olympus/entry/relaxed_ordering
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      27f145e7
    • chris hyser's avatar
      sparc64: Enable setting "relaxed ordering" in IOMMU mappings · aa7bde1a
      chris hyser authored
      Enable relaxed ordering for memory writes in IOMMU TSB entry from
      dma_4v_alloc_coherent(), dma_4v_map_page() and dma_4v_map_sg() when
      dma_attrs DMA_ATTR_WEAK_ORDERING is set. This requires PCI IOMMU I/O
      Translation Services version 2.0 API.
      
      Many PCIe devices allow enabling relaxed-ordering (memory writes bypassing
      other memory writes) for various DMA buffers. A notable exception is the
      Mellanox mlx4 IB adapter. Due to the nature of x86 HW this appears to have
      little performance impact there. On SPARC HW however, this results in major
      performance degradation getting only about 3Gbps. Enabling RO in the IOMMU
      entries corresponding to mlx4 data buffers increases the throughput to
      about 13 Gbps.
      
      Orabug: 19245907
      Signed-off-by: default avatarChris Hyser <chris.hyser@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      aa7bde1a
    • chris hyser's avatar
      sparc64: Enable PCI IOMMU version 2 API · 8914391b
      chris hyser authored
      Enable Version 2 of the PCI IOMMU API needed for advanced features
      such as PCI Relaxed Ordering and greater than 2 GB DMA address
      space per root complex.
      Signed-off-by: default avatarChris Hyser <chris.hyser@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8914391b
    • Paul Gortmaker's avatar
      sparc: migrate exception table users off module.h and onto extable.h · cdd4f4c7
      Paul Gortmaker authored
      These files were only including module.h for exception table
      related functions.  We've now separated that content out into its
      own file "extable.h" so now move over to that and avoid all the
      extra header content in module.h that we don't really need to compile
      these files.
      
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: sparclinux@vger.kernel.org
      Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cdd4f4c7