1. 21 Apr, 2015 1 commit
    • Linus Torvalds's avatar
      Revert "ocfs2: incorrect check for debugfs returns" · 8f443e23
      Linus Torvalds authored
      This reverts commit e2ac55b6.
      
      Huang Ying reports that this causes a hang at boot with debugfs disabled.
      
      It is true that the debugfs error checks are kind of confusing, and this
      code certainly merits more cleanup and thinking about it, but there's
      something wrong with the trivial "check not just for NULL, but for error
      pointers too" patch.
      
      Yes, with debugfs disabled, we will end up setting the o2hb_debug_dir
      pointer variable to an error pointer (-ENODEV), and then continue as if
      everything was fine.  But since debugfs is disabled, all the _users_ of
      that pointer end up being compiled away, so even though the pointer can
      not be dereferenced, that's still fine.
      
      So it's confusing and somewhat questionable, but the "more correct"
      error checks end up causing more trouble than they fix.
      Reported-by: default avatarHuang Ying <ying.huang@intel.com>
      Acked-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Acked-by: default avatarChengyu Song <csong84@gatech.edu>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8f443e23
  2. 20 Apr, 2015 16 commits
    • Linus Torvalds's avatar
      Merge tag 'remoteproc-4.1-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc · 646da631
      Linus Torvalds authored
      Pull remoteproc update from Ohad Ben-Cohen:
       "Suman Anna is adding remoteproc support for processors not behind
        IOMMUs"
      
      * tag 'remoteproc-4.1-next' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
        remoteproc: add IOMMU hardware capability flag
      646da631
    • Linus Torvalds's avatar
      Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild · 8f49309a
      Linus Torvalds authored
      Pull misc kbuild updates:
       "This is the remaining part of kbuild stuff for v4.1-rc1:
      
         - One wew coccinelle script and a clarification of the proposed fix
           in bugon.coccinelle
      
         - CONFIG_KERNEL_LZ4 support for extract-ikconfig"
      
      * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
        scripts/coccinelle/misc/bugon.cocci: update bug_on conversion warning
        scripts/extract-ikconfig: Support LZ4-compressed images.
        irqf_oneshot.cocci: add check of devm_request_threaded_irq()
      8f49309a
    • Linus Torvalds's avatar
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · b153f1d3
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "I'd like to say these were a set of regressions for the recent merge
        window code.  Unfortunately, they all predate the merge window code
        (stable cc'd).
      
        There are two fixes for data integrity (mostly only showing up on
        module removal), an mvsas crash with expander attached SATA devices
        which goes back to the dawn of the driver but is only just being
        picked up as sas expanders become a standard item in low end server
        hardware, an am53c974 one because the interrupt data isn't fully
        initialised before the line is and a megaraid_sas one because it uses
        smp_processor_id() to select MSI-X queues and that now triggers a
        WARN_ON()"
      
      * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        mvsas: fix panic on expander attached SATA devices
        am53c974: Fix crash during modprobe
        megaraid_sas: use raw_smp_processor_id()
        sd: Fix missing ATO tag check
        sd: Unregister integrity profile
      b153f1d3
    • Linus Torvalds's avatar
      Merge tag 'fbdev-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux · bf2ae5d3
      Linus Torvalds authored
      Pull fbdev updates from Tomi Valkeinen:
       "Small fixes and improvements to various fbdev drivers"
      
      * tag 'fbdev-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (24 commits)
        omapdss: extend pm notifier to handle hibernation
        OMAPDSS: Correct video ports description file path in DT binding doc
        OMAPDSS: disable VT switch
        fbdev: sh_mobile_lcdc: Fix destruction of uninitialized mutex
        video: fbdev: sh_mobile_lcdcfb: Fix ROP3 sysfs attribute parsing
        fbdev: pm3fb: cleanup some confusing indenting
        hyperv: hyperv_fb: match wait_for_completion_timeout return type
        video: fbdev: use msecs_to_jiffies for time conversions
        fbdev: via/via_clock: fix sparse warning
        video: fbdev: make of_device_id array const
        fbdev: sm501fb: use memset_io
        OMAPDSS: workaround for MFLAG + NV12 issue
        OMAPDSS: Add support for MFLAG
        OMAPDSS: setup default fifo thresholds
        OMAPDSS: DISPC: lock access to DISPC_CONTROL & DISPC_CONFIG
        OMAPDSS: DISPC: fix div by zero issue in overlay scaling
        OMAPDSS: DISPC: change sync_pclk_edge default value
        OMAPDSS: change signal_level & signal_edge enum values
        OMAPDSS: DISPC: explicit handling for sync and de levels
        OMAPDSS: DISPC: remove OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES
        ...
      bf2ae5d3
    • Linus Torvalds's avatar
      Merge branch 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux · 14aa0244
      Linus Torvalds authored
      Pull drm updates from Dave Airlie:
       "Highlights:
      
        Core:
         - Virtual GEM layer merged, this has been around for a long time, and
           it provides a software backed device that allows userspace to use
           it as a GEM shared memory handler.  This makes it a lot easier to
           do certain things when you have no GPU but still have to deal with
           DRI expectations.
         - atomic helper updates.
         - framebuffer modifier interface added.
         - i2c over auxch displayport fixes.
         - fb width/height confusion fixes.
         - new driver for ps8622/ps8625 bridge chips
         - lots of new panels
      
        i915:
         - more plane atomic conversion
         - vGPU guest support for XenGT
         - Skylake workarounds and fixes
         - Y-tiling support
         - work on dynamic pagetable allocation
         - EU count report param for gen9+
         - CHV fixes (no longer prelim)
         - remove ilk rc6
         - frontbuffer tracking for fbc
         - Displayport link rate refactoring
         - sprite colorkey refactor
      
        radeon:
         - Displayport MST support (not enabled by default)
         - non-ATOM native hw auxch support (DCE5+)
         - output csc support
         - new queries for userspace debug support
         - new VCE packet
      
        nouveau:
         - gk20a iommu support
         - gm107 graphics support
         - more gm20x bringup (waiting on signed nvidia fw).
      
        amdkfd:
         - multiple kgd instance support
         - use 64-bit time accessors
      
        msm:
         - stolen memory support
         - DSI and dual-DSI support
         - snapdragon 410 support
      
        exynos:
         - cleanups for atomic and pageflip
      
        imx-drm:
         - more media-bus formats
         - TV output prep
         - drm panel support
      
        tegra:
         - hw vblank counter using host1x syncpoints
      
        omap:
         - universal plane support
         - prep work for atomic modesetting
      
        rcar-du:
         - ported to atomic modesetting
      
        atmel-hlcdc:
         - ported to atomic modesetting
         - added suspend/resume support
      
        sti:
         - ported to atomic modesetting
      
        dwhdmi:
         - more compliant audio support
         - update rockchip phy support
      
        tda998x:
         - DT probing for attached crtcs
         - simplified EDID reading
      
        rockchip:
         - fixes
      
        adv7511:
         - fixes"
      
      * 'drm-next-merged' of git://people.freedesktop.org/~airlied/linux: (689 commits)
        media-bus: Fixup RGB444_1X12, RGB565_1X16, and YUV8_1X24 media bus format
        drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
        drm/i915: Move drm_framebuffer_unreference out of struct_mutex for takeover
        drm: fix trivial typo mistake
        drm: Make integer overflow checking cover universal cursor updates (v2)
        drm/nouveau/bios: fix fetching from acpi on certain systems
        drm/nouveau/gr/gm206: initial init+ctx code
        drm/nouveau/ce/gm206: enable support via gm204 code
        drm/nouveau/fifo/gm206: enable support via gm204 code
        drm/nouveau/gr/gm204: initial init+ctx code
        drm/nouveau: support for buffer moves via MaxwellDmaCopyA
        drm/nouveau/ce/gm204: initial support
        drm/nouveau: add support for gm20x fifo channels
        drm/nouveau/fifo/gm204: initial support
        drm/nouveau/gr/gk104-: prevent reading non-existent regs in intr handler
        drm/nouveau/gr/gm107: very slightly demagic part of attrib cb setup
        drm/nouveau/gr/gk104-: correct crop/zrop num_active_fbps setting
        drm/nouveau/gr/gf100-: add symbolic names for classes
        drm/nouveau/gr/gm107: support tpc "strand" ctxsw in gpccs ucode
        drm/nouveau/gr/gf100-: support mmio access with gpc offset from gpccs ucode
        ...
      14aa0244
    • Linus Torvalds's avatar
      Merge tag 'iommu-updates-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 79319a05
      Linus Torvalds authored
      Pull IOMMU updates from Joerg Roedel:
       "Not much this time, but the changes include:
      
         - moving domain allocation into the iommu drivers to prepare for the
           introduction of default domains for devices
      
         - fixing the IO page-table code in the AMD IOMMU driver to correctly
           encode large page sizes
      
         - extension of the PCI support in the ARM-SMMU driver
      
         - various fixes and cleanups"
      
      * tag 'iommu-updates-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (34 commits)
        iommu/amd: Correctly encode huge pages in iommu page tables
        iommu/amd: Optimize amd_iommu_iova_to_phys for new fetch_pte interface
        iommu/amd: Optimize alloc_new_range for new fetch_pte interface
        iommu/amd: Optimize iommu_unmap_page for new fetch_pte interface
        iommu/amd: Return the pte page-size in fetch_pte
        iommu/amd: Add support for contiguous dma allocator
        iommu/amd: Don't allocate with __GFP_ZERO in alloc_coherent
        iommu/amd: Ignore BUS_NOTIFY_UNBOUND_DRIVER event
        iommu/amd: Use BUS_NOTIFY_REMOVED_DEVICE
        iommu/tegra: smmu: Compute PFN mask at runtime
        iommu/tegra: gart: Set aperture at domain initialization time
        iommu/tegra: Setup aperture
        iommu: Remove domain_init and domain_free iommu_ops
        iommu/fsl: Make use of domain_alloc and domain_free
        iommu/rockchip: Make use of domain_alloc and domain_free
        iommu/ipmmu-vmsa: Make use of domain_alloc and domain_free
        iommu/shmobile: Make use of domain_alloc and domain_free
        iommu/msm: Make use of domain_alloc and domain_free
        iommu/tegra-gart: Make use of domain_alloc and domain_free
        iommu/tegra-smmu: Make use of domain_alloc and domain_free
        ...
      79319a05
    • Linus Torvalds's avatar
      Merge tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · 6496edfc
      Linus Torvalds authored
      Pull final removal of deprecated cpus_* cpumask functions from Rusty Russell:
       "This is the final removal (after several years!) of the obsolete
        cpus_* functions, prompted by their mis-use in staging.
      
        With these function removed, all cpu functions should only iterate to
        nr_cpu_ids, so we finally only allocate that many bits when cpumasks
        are allocated offstack"
      
      * tag 'cpumask-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (25 commits)
        cpumask: remove __first_cpu / __next_cpu
        cpumask: resurrect CPU_MASK_CPU0
        linux/cpumask.h: add typechecking to cpumask_test_cpu
        cpumask: only allocate nr_cpumask_bits.
        Fix weird uses of num_online_cpus().
        cpumask: remove deprecated functions.
        mips: fix obsolete cpumask_of_cpu usage.
        x86: fix more deprecated cpu function usage.
        ia64: remove deprecated cpus_ usage.
        powerpc: fix deprecated CPU_MASK_CPU0 usage.
        CPU_MASK_ALL/CPU_MASK_NONE: remove from deprecated region.
        staging/lustre/o2iblnd: Don't use cpus_weight
        staging/lustre/libcfs: replace deprecated cpus_ calls with cpumask_
        staging/lustre/ptlrpc: Do not use deprecated cpus_* functions
        blackfin: fix up obsolete cpu function usage.
        parisc: fix up obsolete cpu function usage.
        tile: fix up obsolete cpu function usage.
        arm64: fix up obsolete cpu function usage.
        mips: fix up obsolete cpu function usage.
        x86: fix up obsolete cpu function usage.
        ...
      6496edfc
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · b19a42e3
      Linus Torvalds authored
      Pull more s390 updates from Martin Schwidefsky:
       "The big thing in this second merge for s390 is the new eBPF JIT from
        Michael which replaces the old 32-bit backend.
      
        The remaining commits are bug fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/pci: add locking for fmb access
        s390/pci: extract software counters from fmb
        s390/dasd: Fix unresumed device after suspend/resume having no paths
        s390/dasd: fix unresumed device after suspend/resume
        s390/dasd: fix inability to set a DASD device offline
        s390/mm: Fix memory hotplug for unaligned standby memory
        s390/bpf: Add s390x eBPF JIT compiler backend
        s390: Use bool function return values of true/false not 1/0
      b19a42e3
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu · 5ca08a82
      Linus Torvalds authored
      Pull m68k fixes from Greg Ungerer:
       "Nothing big, spelling fixes and fix/cleanup for ColdFire eth device setup"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
        m68knommu: fix fec setup warning for ColdFire 5271 builds
        m68knommu: ColdFire 5271 only has a single FEC controller
        m68k: Fix trivial typos in comments
      5ca08a82
    • Linus Torvalds's avatar
      smp: don't use 16-bit words for atomic accesses · f4d03bd1
      Linus Torvalds authored
      Yes, it should work, but it's a bad idea.  Not only did ARM64 not have
      the 16-bit access code (there's a separate patch to add it), it's just
      not a good atomic type.  Some architectures fundamentally don't do
      atomic accesses in them (alpha), and it's not like it saves any space
      here anyway because of structure packing issues.
      
      We normally should aim for flags to be "unsigned int" or "unsigned
      long".  And if space is at a premium, use a single byte (although that
      causes problems on alpha again).  There might be very special cases
      where a 16-byte entity is really wanted, but this is not one of them.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      f4d03bd1
    • Tomi Valkeinen's avatar
      Merge omapdss topic branch for fbdev 4.1 · 6b75b54c
      Tomi Valkeinen authored
      6b75b54c
    • Grygorii Strashko's avatar
      omapdss: extend pm notifier to handle hibernation · aa977f62
      Grygorii Strashko authored
      Add handling of missed events in omap_dss_pm_notif which are
      needed to support hibernation (suspend to disk).
      Signed-off-by: default avatarGrygorii Strashko <Grygorii.Strashko@linaro.org>
      Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      aa977f62
    • Javier Martinez Canillas's avatar
      OMAPDSS: Correct video ports description file path in DT binding doc · 34260a79
      Javier Martinez Canillas authored
      The doc refers to Documentation/devicetree/bindings/video/video-ports.txt
      which does not exist. The documentation seems to be outdated and wants to
      refer to Documentation/devicetree/bindings/graph.txt instead.
      Signed-off-by: default avatarJavier Martinez Canillas <javier.martinez@collabora.co.uk>
      Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      34260a79
    • Tomi Valkeinen's avatar
      OMAPDSS: disable VT switch · cb17a4ae
      Tomi Valkeinen authored
      We don't need VT switch when suspending/resuming, so disable it. This
      speeds up suspend/resume.
      Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: NeilBrown <neil@brown.name>
      cb17a4ae
    • Dave Airlie's avatar
      Merge Linus master into drm-next · 2c33ce00
      Dave Airlie authored
      The merge is clean, but the arm build fails afterwards,
      due to API changes in the regulator tree.
      
      I've included the patch into the merge to fix the build.
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      2c33ce00
    • Philipp Zabel's avatar
      media-bus: Fixup RGB444_1X12, RGB565_1X16, and YUV8_1X24 media bus format · cec32a47
      Philipp Zabel authored
      Change the constant values for RGB444_1X12, RGB565_1X16, and YUV8_1X24 media
      bus formats in anticipation of a merge conflict with the media tree, where
      the old values are already taken by RBG888_1X24, RGB888_1X32_PADHI, and
      VUY8_1X24, respectively.
      Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      cec32a47
  3. 19 Apr, 2015 6 commits
    • Linus Torvalds's avatar
      Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux · 09d51602
      Linus Torvalds authored
      Pull turbostat update from Len Brown:
       "Updates to the turbostat utility.
      
        Just one kernel dependency in this batch -- added a #define to
        msr-index.h"
      
      * 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
        tools/power turbostat: correct dumped pkg-cstate-limit value
        tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL
        tools/power turbostat: correct DRAM RAPL units on recent Xeon processors
        tools/power turbostat: Initial Skylake support
        tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile
        tools/power turbostat: modprobe msr, if needed
        tools/power turbostat: dump MSR_TURBO_RATIO_LIMIT2
        tools/power turbostat: use new MSR_TURBO_RATIO_LIMIT names
        x86 msr-index: define MSR_TURBO_RATIO_LIMIT,1,2
        tools/power turbostat: label base frequency
        tools/power turbostat: update PERF_LIMIT_REASONS decoding
        tools/power turbostat: simplify default output
      09d51602
    • Linus Torvalds's avatar
      Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 6162e4b0
      Linus Torvalds authored
      Pull ext4 updates from Ted Ts'o:
       "A few bug fixes and add support for file-system level encryption in
        ext4"
      
      * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (31 commits)
        ext4 crypto: enable encryption feature flag
        ext4 crypto: add symlink encryption
        ext4 crypto: enable filename encryption
        ext4 crypto: filename encryption modifications
        ext4 crypto: partial update to namei.c for fname crypto
        ext4 crypto: insert encrypted filenames into a leaf directory block
        ext4 crypto: teach ext4_htree_store_dirent() to store decrypted filenames
        ext4 crypto: filename encryption facilities
        ext4 crypto: implement the ext4 decryption read path
        ext4 crypto: implement the ext4 encryption write path
        ext4 crypto: inherit encryption policies on inode and directory create
        ext4 crypto: enforce context consistency
        ext4 crypto: add encryption key management facilities
        ext4 crypto: add ext4 encryption facilities
        ext4 crypto: add encryption policy and password salt support
        ext4 crypto: add encryption xattr support
        ext4 crypto: export ext4_empty_dir()
        ext4 crypto: add ext4 encryption Kconfig
        ext4 crypto: reserve codepoints used by the ext4 encryption feature
        ext4 crypto: add ext4_mpage_readpages()
        ...
      6162e4b0
    • Linus Torvalds's avatar
      hexdump: avoid warning in test function · 17974c05
      Linus Torvalds authored
      The test_data_1_le[] array is a const array of const char *.  To avoid
      dropping any const information, we need to use "const char * const *",
      not just "const char **".
      
      I'm not sure why the different test arrays end up having different
      const'ness, but let's make the pointer we use to traverse them as const
      as possible, since we modify neither the array of pointers _or_ the
      pointers we find in the array.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      17974c05
    • Jann Horn's avatar
      fs: take i_mutex during prepare_binprm for set[ug]id executables · 8b01fc86
      Jann Horn authored
      This prevents a race between chown() and execve(), where chowning a
      setuid-user binary to root would momentarily make the binary setuid
      root.
      
      This patch was mostly written by Linus Torvalds.
      Signed-off-by: default avatarJann Horn <jann@thejh.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8b01fc86
    • Linus Torvalds's avatar
      smp: Fix error case handling in smp_call_function_*() · 5224b961
      Linus Torvalds authored
      Commit 8053871d ("smp: Fix smp_call_function_single_async()
      locking") fixed the locking for the asynchronous smp-call case, but in
      the process of moving the lock handling around, one of the error cases
      ended up not unlocking the call data at all.
      
      This went unnoticed on x86, because this is a "caller is buggy" case,
      where the caller is trying to call a non-existent CPU.  But apparently
      ARM does that (at least under qemu-arm).  Bindly doing cross-cpu calls
      to random CPU's that aren't even online seems a bit fishy, but the error
      handling was clearly not correct.
      
      Simply add the missing "csd_unlock()" to the error path.
      Reported-and-tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Analyzed-by: default avatarRabin Vincent <rabin@rab.in>
      Acked-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5224b961
    • Rusty Russell's avatar
      cpumask: remove __first_cpu / __next_cpu · e4afa120
      Rusty Russell authored
      They were for use by the deprecated first_cpu() and next_cpu() wrappers,
      but sparc used them directly.
      
      They're now replaced by cpumask_first / cpumask_next.  And __next_cpu_nr
      is completely obsolete.
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
      e4afa120
  4. 18 Apr, 2015 17 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · 64fb1d0e
      Linus Torvalds authored
      Pull sparc fixes from David Miller
       "Unfortunately, I brown paper bagged the generic iommu pool allocator
        by applying the wrong revision of the patch series.
      
        This reverts the bad one, and puts the right one in"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        iommu-common: Fix PARISC compile-time warnings
        sparc: Make LDC use common iommu poll management functions
        sparc: Make sparc64 use scalable lib/iommu-common.c functions
        Break up monolithic iommu table/lock into finer graularity pools and lock
        sparc: Revert generic IOMMU allocator.
      64fb1d0e
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs · dba94f21
      Linus Torvalds authored
      Pull 9pfs updates from Eric Van Hensbergen:
       "Some accumulated cleanup patches for kerneldoc and unused variables as
        well as some lock bug fixes and adding privateport option for RDMA"
      
      * tag 'for-linus-4.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
        net/9p: add a privport option for RDMA transport.
        fs/9p: Initialize status in v9fs_file_do_lock.
        net/9p: Initialize opts->privport as it should be.
        net/9p: use memcpy() instead of snprintf() in p9_mount_tag_show()
        9p: use unsigned integers for nwqid/count
        9p: do not crash on unknown lock status code
        9p: fix error handling in v9fs_file_do_lock
        9p: remove unused variable in p9_fd_create()
        9p: kerneldoc warning fixes
      dba94f21
    • David S. Miller's avatar
      Merge branch 'iommu-generic-allocator' · ccb30186
      David S. Miller authored
      Sowmini Varadhan says:
      
      ====================
      Generic IOMMU pooled allocator
      
      Investigation of network performance on Sparc shows a high
      degree of locking contention in the IOMMU allocator, and it
      was noticed that the PowerPC code has a better locking model.
      
      This patch series tries to extract the generic parts of the
      PowerPC code so that it can be shared across multiple PCI
      devices and architectures.
      
      v10: resend patchv9 without RFC tag, and a new mail Message-Id,
      (previous non-RFC attempt did not show up on the patchwork queue?)
      
      Full revision history below:
      v2 changes:
        - incorporate David Miller editorial comments: sparc specific
          fields moved from iommu-common into sparc's iommu_64.h
        - make the npools value an input parameter, for the case when
          the iommu map size is not very large
        - cookie_to_index mapping, and optimizations for span-boundary
          check, for use case such as LDC.
      
      v3: eliminate iommu_sparc, rearrange the ->demap indirection to
          be invoked under the pool lock.
      
      v4: David Miller review changes:
        - s/IOMMU_ERROR_CODE/DMA_ERROR_CODE
        - page_table_map_base and page_table_shift are unsigned long, not u32.
      
      v5: removed ->cookie_to_index and ->demap indirection from the
          iommu_tbl_ops The caller needs to call these functions as needed,
          before invoking the generic arena allocator functions.
          Added the "skip_span_boundary" argument to iommu_tbl_pool_init() for
          those callers like LDC which do no care about span boundary checks.
      
      v6: removed iommu_tbl_ops, and instead pass the ->flush_all as
          an indirection to iommu_tbl_pool_init(); only invoke ->flush_all
          when there is no large_pool, based on the assumption that large-pool
          usage is infrequently encountered
      
      v7: moved pool_hash initialization to lib/iommu-common.c and cleaned up
          code duplication from sun4v/sun4u/ldc.
      
      v8: Addresses BenH comments with one exception: I've left the
          IOMMU_POOL_HASH as is, so that powerpc can tailor it to their
          convenience.  Discard trylock for simple spin_lock to acquire pool
      
      v9: Addresses latest BenH comments: need_flush checks, add support
          for dma mask and align_order.
      
      v10: resend without RFC tag, and new mail Message-Id.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ccb30186
    • Sowmini Varadhan's avatar
      iommu-common: Fix PARISC compile-time warnings · 2f0c0fdc
      Sowmini Varadhan authored
      Fixes warnings due to
      - no DMA_ERROR_CODE on PARISC,
      - sizeof (unsigned long) == 4 bytes on PARISC.
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2f0c0fdc
    • Sowmini Varadhan's avatar
      sparc: Make LDC use common iommu poll management functions · 0ae53ed1
      Sowmini Varadhan authored
      Note that this conversion is only being done to consolidate the
      code and ensure that the common code provides the sufficient
      abstraction. It is not expected to result in any noticeable
      performance improvement, as there is typically one ldc_iommu
      per vnet_port, and each one has 8k entries, with a typical
      request for 1-4 pages.  Thus LDC uses npools == 1.
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0ae53ed1
    • Sowmini Varadhan's avatar
      sparc: Make sparc64 use scalable lib/iommu-common.c functions · bb620c3d
      Sowmini Varadhan authored
      In iperf experiments running linux as the Tx side (TCP client) with
      10 threads results in a severe performance drop when TSO is disabled,
      indicating a weakness in the software that can be avoided by using
      the scalable IOMMU arena DMA allocation.
      
      Baseline numbers before this patch:
         with default settings (TSO enabled) :    9-9.5 Gbps
         Disable TSO using ethtool- drops badly:  2-3 Gbps.
      
      After this patch, iperf client with 10 threads, can give a
      throughput of at least 8.5 Gbps, even when TSO is disabled.
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bb620c3d
    • Sowmini Varadhan's avatar
      Break up monolithic iommu table/lock into finer graularity pools and lock · ff7d37a5
      Sowmini Varadhan authored
      Investigation of multithreaded iperf experiments on an ethernet
      interface show the iommu->lock as the hottest lock identified by
      lockstat, with something of the order of  21M contentions out of
      27M acquisitions, and an average wait time of 26 us for the lock.
      This is not efficient. A more scalable design is to follow the ppc
      model, where the iommu_map_table has multiple pools, each stretching
      over a segment of the map, and with a separate lock for each pool.
      This model allows for better parallelization of the iommu map search.
      
      This patch adds the iommu range alloc/free function infrastructure.
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ff7d37a5
    • David S. Miller's avatar
      sparc: Revert generic IOMMU allocator. · c12f048f
      David S. Miller authored
      I applied the wrong version of this patch series, V4 instead
      of V10, due to a patchwork bundling snafu.
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c12f048f
    • Len Brown's avatar
      tools/power turbostat: correct dumped pkg-cstate-limit value · e9257f5f
      Len Brown authored
      HSW expanded MSR_PKG_CST_CONFIG_CONTROL.Package-C-State-Limit,
      from bits[2:0] used by previous implementations, to [3:0].
      The value 1000b is unlimited, and is used by BDW and SKL too.
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      e9257f5f
    • Len Brown's avatar
      tools/power turbostat: calculate TSC frequency from CPUID(0x15) on SKL · 8a5bdf41
      Len Brown authored
      turbostat --debug
      ...
      CPUID(0x15): eax_crystal: 2 ebx_tsc: 100 ecx_crystal_hz: 0
      TSC: 1200 MHz (24000000 Hz * 100 / 2 / 1000000)
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      8a5bdf41
    • Andrey Semin's avatar
      tools/power turbostat: correct DRAM RAPL units on recent Xeon processors · 40ee8e3b
      Andrey Semin authored
      While not yet documented in the Software Developer's Manual,
      the data-sheet for modern Xeon states that DRAM RAPL ENERGY units
      are fixed at 15.3 uJ, rather than being discovered via MSR.
      
      Before this patch, DRAM energy on these products is over-stated by turbostat
      because the RAPL units are 4x larger.
      
      ref: "Xeon E5-2600 v3/E5-1600 v3 Datasheet Volume 2"
      http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e5-v3-datasheet-vol-2.pdfSigned-off-by: default avatarAndrey Semin <andrey.semin@intel.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      40ee8e3b
    • Len Brown's avatar
      tools/power turbostat: Initial Skylake support · 0b2bb692
      Len Brown authored
      Skylake adds some additional residency counters.
      
      Skylake supports a different mix of RAPL registers
      from any previous product.
      
      In most other ways, Skylake is like Broadwell.
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      0b2bb692
    • Thomas D's avatar
      tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile · f82263c6
      Thomas D authored
      Since commit ee0778a3
      ("tools/power: turbostat: make Makefile a bit more capable")
      turbostat's Makefile is using
      
        [...]
        BUILD_OUTPUT    := $(PWD)
        [...]
      
      which obviously causes trouble when building "turbostat" with
      
        make -C /usr/src/linux/tools/power/x86/turbostat ARCH=x86 turbostat
      
      because GNU make does not update nor guarantee that $PWD is set.
      
      This patch changes the Makefile to use $CURDIR instead, which GNU make
      guarantees to set and update (i.e. when using "make -C ...") and also
      adds support for the O= option (see "make help" in your root of your
      kernel source tree for more details).
      
      Link: https://bugs.gentoo.org/show_bug.cgi?id=533918
      Fixes: ee0778a3 ("tools/power: turbostat: make Makefile a bit more capable")
      Signed-off-by: default avatarThomas D. <whissi@whissi.de>
      Cc: Mark Asselstine <mark.asselstine@windriver.com>
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      f82263c6
    • Len Brown's avatar
      tools/power turbostat: modprobe msr, if needed · a21d38c8
      Len Brown authored
      Some distros (Ubuntu) ship the msr driver as a module.
      If turbosat is run as root on those systems, and discovers
      that there is no /dev/cpu/cpu0/msr, it will now "modprobe msr"
      for the user.
      
      If not root, the modprobe attempt will fail, and turbostat will exit as before:
      
      turbostat: no /dev/cpu/0/msr, Try "# modprobe msr" : No such file or directory
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      a21d38c8
    • Len Brown's avatar
      tools/power turbostat: dump MSR_TURBO_RATIO_LIMIT2 · fcd17211
      Len Brown authored
      and up to 18 cores of turbo ratio limit
      when using the turbostat --debug option.
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      fcd17211
    • Len Brown's avatar
      tools/power turbostat: use new MSR_TURBO_RATIO_LIMIT names · 12bb43c6
      Len Brown authored
      s/MSR_NHM_TURBO_RATIO_LIMIT/MSR_TURBO_RATIO_LIMIT/
      s/MSR_IVT_TURBO_RATIO_LIMIT/MSR_TURBO_RATIO_LIMIT1/
      
      syntax only -- use the documented strings describing these registers.
      Signed-off-by: default avatarLen Brown <len.brown@intel.com>
      12bb43c6
    • Linus Torvalds's avatar
      Merge branch 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 34a984f7
      Linus Torvalds authored
      Pull PMEM driver from Ingo Molnar:
       "This is the initial support for the pmem block device driver:
        persistent non-volatile memory space mapped into the system's physical
        memory space as large physical memory regions.
      
        The driver is based on Intel code, written by Ross Zwisler, with fixes
        by Boaz Harrosh, integrated with x86 e820 memory resource management
        and tidied up by Christoph Hellwig.
      
        Note that there were two other separate pmem driver submissions to
        lkml: but apparently all parties (Ross Zwisler, Boaz Harrosh) are
        reasonably happy with this initial version.
      
        This version enables minimal support that enables persistent memory
        devices out in the wild to work as block devices, identified through a
        magic (non-standard) e820 flag and auto-discovered if
        CONFIG_X86_PMEM_LEGACY=y, or added explicitly through manipulating the
        memory maps via the "memmap=..." boot option with the new, special '!'
        modifier character.
      
        Limitations: this is a regular block device, and since the pmem areas
        are not struct page backed, they are invisible to the rest of the
        system (other than the block IO device), so direct IO to/from pmem
        areas, direct mmap() or XIP is not possible yet.  The page cache will
        also shadow and double buffer pmem contents, etc.
      
        Initial support is for x86"
      
      * 'x86-pmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        drivers/block/pmem: Fix 32-bit build warning in pmem_alloc()
        drivers/block/pmem: Add a driver for persistent memory
        x86/mm: Add support for the non-standard protected e820 type
      34a984f7