1. 09 Sep, 2016 2 commits
    • Nicholas Piggin's avatar
      kbuild: allow archs to select link dead code/data elimination · b67067f1
      Nicholas Piggin authored
      Introduce LD_DEAD_CODE_DATA_ELIMINATION option for architectures to
      select to build with -ffunction-sections, -fdata-sections, and link
      with --gc-sections. It requires some work (documented) to ensure all
      unreferenced entrypoints are live, and requires toolchain and build
      verification, so it is made a per-arch option for now.
      On a random powerpc64le build, this yelds a significant size saving,
      it boots and runs fine, but there is a lot I haven't tested as yet, so
      these savings may be reduced if there are bugs in the link.
          text      data        bss        dec   filename
      11169741   1180744    1923176	14273661   vmlinux
      10445269   1004127    1919707	13369103   vmlinux.dce
      ~700K text, ~170K data, 6% removed from kernel image size.
      Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
      Signed-off-by: default avatarMichal Marek <mmarek@suse.com>
    • Stephen Rothwell's avatar
      kbuild: allow architectures to use thin archives instead of ld -r · a5967db9
      Stephen Rothwell authored
      ld -r is an incremental link used to create built-in.o files in build
      subdirectories. It produces relocatable object files containing all
      its input files, and these are are then pulled together and relocated
      in the final link. Aside from the bloat, this constrains the final
      link relocations, which has bitten large powerpc builds with
      unresolvable relocations in the final link.
      Alan Modra has recommended the kernel use thin archives for linking.
      This is an alternative and means that the linker has more information
      available to it when it links the kernel.
      This patch enables a config option architectures can select, which
      causes all built-in.o files to be built as thin archives. built-in.o
      files in subdirectories do not get symbol table or index attached,
      which improves speed and size. The final link pass creates a
      built-in.o archive in the root output directory which includes the
      symbol table and index. The linker then uses takes this file to link.
      The --whole-archive linker option is required, because the linker now
      has visibility to every individual object file, and it will otherwise
      just completely avoid including those without external references
      (consider a file with EXPORT_SYMBOL or initcall or hardware exceptions
      as its only entry points). The traditional built works "by luck" as
      built-in.o files are large enough that they're going to get external
      references. However this optimisation is unpredictable for the kernel
      (due to above external references), ineffective at culling unused, and
      costly because the .o files have to be searched for references.
      Superior alternatives for link-time culling should be used instead.
      Build characteristics for inclink vs thinarc, on a small powerpc64le
      pseries VM with a modest .config:
                                        inclink       thinarc
      vmlinux                        15 618 680    15 625 028
      sum of all built-in.o          56 091 808     1 054 334
      sum excluding root built-in.o                   151 430
      find -name built-in.o | xargs rm ; time make vmlinux
      real                              22.772s       21.143s
      user                              13.280s       13.430s
      sys                                4.310s        2.750s
      - Final kernel pulled in only about 6K more, which shows how
        ineffective the object file culling is.
      - Build performance looks improved due to less pagecache activity.
        On IO constrained systems it could be a bigger win.
      - Build size saving is significant.
      Side note, the toochain understands archives, so there's some tricks,
      $ ar t built-in.o          # list all files you linked with
      $ size built-in.o          # and their sizes
      $ objdump -d built-in.o    # disassembly (unrelocated) with filenames
      Implementation by sfr, minor tweaks by npiggin.
      Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
      Signed-off-by: default avatarMichal Marek <mmarek@suse.com>
  2. 25 Aug, 2016 2 commits
  3. 24 Aug, 2016 1 commit
    • Alexey Dobriyan's avatar
      fixdep: faster CONFIG_ search · dee81e98
      Alexey Dobriyan authored
      Do you think kernel build is 100% dominated by gcc? You are wrong!
      One small utility called "fixdep" consistently manages to sneak into
      profile's first page (unless you have small monitor of course).
      The choke point is this clever code:
      	for (; m < end; m++) {
      		if (*m == INT_CONF) { p = (char *) m  ; goto conf; }
      		if (*m == INT_ONFI) { p = (char *) m-1; goto conf; }
      		if (*m == INT_NFIG) { p = (char *) m-2; goto conf; }
      		if (*m == INT_FIG_) { p = (char *) m-3; goto conf; }
      4 branches per 4 characters is not fast.
      Use strstr(3), so that SSE2 etc can be used.
      With this patch, fixdep is so deep at the bottom, it is hard to find it.
      Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarMichal Marek <mmarek@suse.com>
  4. 08 Aug, 2016 13 commits
    • Al Viro's avatar
      ia64: move exports to definitions · e007c533
      Al Viro authored
      Here we have another kind of deviation from the default case -
      a difference between exporting functions and non-functions.
      EXPORT_DATA_SYMBOL... is really different from EXPORT_SYMBOL...
      on ia64, and we need to use the right one when moving exports
      from *.c where C compiler has the required information to
      *.S, where we need to supply it manually.
      parisc64 will be another one like that.
      Tested-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      sparc32: debride memcpy.S a bit · fb2e6fdb
      Al Viro authored
      unreachable code, unused macros...
      Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
    • Al Viro's avatar
      sparc: move exports to definitions · d3867f04
      Al Viro authored
      Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      ppc: move exports to definitions · 9445aa1a
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      arm: move exports to definitions · 4dd1837d
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
    • Al Viro's avatar
    • Al Viro's avatar
      alpha: move exports to actual definitions · 00fc0e0d
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      x86: move exports to actual definitions · 784d5699
      Al Viro authored
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      EXPORT_SYMBOL() for asm · 22823ab4
      Al Viro authored
      Add asm-usable variants of EXPORT_SYMBOL/EXPORT_SYMBOL_GPL.  This
      commit just adds the default implementation; most of the architectures
      can simply add export.h to asm/Kbuild and start using <asm/export.h>
      from assembler.  The rest needs to have their <asm/export.h> define
      everal macros and then explicitly include <asm-generic/export.h>
      One area where the things might diverge from default is the alignment;
      normally it's 8 bytes on 64bit targets and 4 on 32bit ones, both for
      unsigned long and for struct kernel_symbol.  Unfortunately, amd64 and
      m68k are unusual - m68k aligns to 2 bytes (for both) and amd64 aligns
      struct kernel_symbol to 16 bytes.  For those we'll need asm/export.h to
      override the constants used by generic version - KSYM_ALIGN and KCRC_ALIGN
      for kernel_symbol and unsigned long resp.  And no, __alignof__ would not
      do the trick - on amd64 __alignof__ of struct kernel_symbol is 8, not 16.
      More serious source of unpleasantness is treatment of function
      descriptors on architectures that have those.  Things like ppc64,
      parisc, ia64, etc.  need more than the address of the first insn to
      call an arbitrary function.  As the result, their representation of
      pointers to functions is not the typical "address of the entry point" -
      it's an address of a small static structure containing all the required
      information (including the entry point, of course).  Sadly, the asm-side
      conventions differ in what the function name refers to - entry point or
      the function descriptor.  On ppc64 we do the latter;
      	bar: .quad foo
      is what void (*bar)(void) = foo; turns into and the rare places where
      we need to explicitly work with the label of entry point are dealt with
      as DOTSYM(foo).  For our purposes it's ideal - generic macros are usable.
      However, parisc would have foo and P%foo used for label of entry point
      and address of the function descriptor and
      	bar: .long P%foo
      woudl be used instead.	ia64 goes similar to parisc in that respect,
      except that there it's @fptr(foo) rather than P%foo.  Such architectures
      need to define KSYM_FUNC that would turn a function name into whatever
      is needed to refer to function descriptor.
      What's more, on such architectures we need to know whether we are exporting
      a function or an object - in assembler we have to tell that explicitly, to
      decide whether we want EXPORT_SYMBOL(foo) produce e.g.
      	__ksymtab_foo: .quad foo
      	__ksymtab_foo: .quad @fptr(foo)
      For that reason we introduce EXPORT_DATA_SYMBOL{,_GPL}(), to be used for
      exports of data objects.  On normal architectures it's the same thing
      as EXPORT_SYMBOL{,_GPL}(), but on parisc-like ones they differ and the
      right one needs to be used.  Most of the exports are functions, so we
      keep EXPORT_SYMBOL for those...
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Al Viro's avatar
      [kbuild] handle exports in lib-y objects reliably · 7f2084fa
      Al Viro authored
      Collect the symbols exported by anything that goes into lib.a and
      add an empty object (lib-exports.o) with explicit undefs for each
      of those to obj-y.
      That allows to relax the rules regarding the use of exports in
      lib-* objects - right now an object with export can be in lib-*
      only if we are guaranteed that there always will be users in
      built-in parts of the tree, otherwise it needs to be in obj-*.
      As the result, we have an unholy mix of lib- and obj- in lib/Makefile
      and (especially) in arch/*/lib/Makefile.  Moreover, a change in
      generic part of the kernel can lead to mysteriously missing exports
      on some configs.  With this change we don't have to worry about
      that anymore.
      One side effect is that built-in.o now pulls everything with exports
      from the corresponding lib.a (if such exists).  That's exactly what
      we want for linking vmlinux and fortunately it's almost the only thing
      built-in.o is used in.  arch/ia64/hp/sim/boot/bootloader is the only
      exception and it's easy to get rid of now - just turn everything in
      arch/ia64/lib into lib-* and don't bother with arch/ia64/lib/built-in.o
      [AV: stylistic fix from Michal folded in]
      Acked-by: default avatarMichal Marek <mmarek@suse.cz>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    • Linus Torvalds's avatar
      Linux 4.8-rc1 · 29b4817d
      Linus Torvalds authored
  5. 07 Aug, 2016 10 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 857953d7
      Linus Torvalds authored
      Pull more block fixes from Jens Axboe:
       "As mentioned in the pull the other day, a few more fixes for this
        round, all related to the bio op changes in this series.
        Two fixes, and then a cleanup, renaming bio->bi_rw to bio->bi_opf.  I
        wanted to do that change right after or right before -rc1, so that
        risk of conflict was reduced.  I just rebased the series on top of
        current master, and no new ->bi_rw usage has snuck in"
      * 'for-linus' of git://git.kernel.dk/linux-block:
        block: rename bio bi_rw to bi_opf
        target: iblock_execute_sync_cache() should use bio_set_op_attrs()
        mm: make __swap_writepage() use bio_set_op_attrs()
        block/mm: make bdev_ops->rw_page() take a bool for read/write
    • Linus Torvalds's avatar
      Merge tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linux · 635a4ba1
      Linus Torvalds authored
      Pull drm zpos property support from Dave Airlie:
       "This tree was waiting on some media stuff I hadn't had time to get a
        stable branchpoint off, so I just waited until it was all in your tree
        It's been around a bit on the list and shouldn't affect anything
        outside adding the generic API and moving some ARM drivers to using
      * tag 'drm-for-v4.8-zpos' of git://people.freedesktop.org/~airlied/linux:
        drm: rcar: use generic code for managing zpos plane property
        drm/exynos: use generic code for managing zpos plane property
        drm: sti: use generic zpos for plane
        drm: add generic zpos property
    • Jens Axboe's avatar
      block: rename bio bi_rw to bi_opf · 1eff9d32
      Jens Axboe authored
      Since commit 63a4cc24, bio->bi_rw contains flags in the lower
      portion and the op code in the higher portions. This means that
      old code that relies on manually setting bi_rw is most likely
      going to be broken. Instead of letting that brokeness linger,
      rename the member, to force old and out-of-tree code to break
      at compile time instead of at runtime.
      No intended functional changes in this commit.
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    • Jens Axboe's avatar
      target: iblock_execute_sync_cache() should use bio_set_op_attrs() · 31c64f78
      Jens Axboe authored
      The original commit missed this function, it needs to mark it a
      write flush.
      Cc: Mike Christie <mchristi@redhat.com>
      Fixes: e742fc32 ("target: use bio op accessors")
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    • Jens Axboe's avatar
      mm: make __swap_writepage() use bio_set_op_attrs() · ba13e83e
      Jens Axboe authored
      Cleaner than manipulating bio->bi_rw flags directly.
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    • Jens Axboe's avatar
      block/mm: make bdev_ops->rw_page() take a bool for read/write · c11f0c0b
      Jens Axboe authored
      Commit abf54548 changed it from an 'rw' flags type to the
      newer ops based interface, but now we're effectively leaking
      some bdev internals to the rest of the kernel. Since we only
      care about whether it's a read or a write at that level, just
      pass in a bool 'is_write' parameter instead.
      Then we can also move op_is_write() and friends back under
      CONFIG_BLOCK protection.
      Reviewed-by: default avatarMike Christie <mchristi@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    • Linus Torvalds's avatar
      Merge tag 'doc-4.8-fixes' of git://git.lwn.net/linux · 52ddb7e9
      Linus Torvalds authored
      Pull documentation fixes from Jonathan Corbet:
       "Three fixes for the docs build, including removing an annoying warning
        on 'make help' if sphinx isn't present"
      * tag 'doc-4.8-fixes' of git://git.lwn.net/linux:
        DocBook: use DOCBOOKS="" to ignore DocBooks instead of IGNORE_DOCBOOKS=1
        Documenation: update cgroup's document path
        Documentation/sphinx: do not warn about missing tools in 'make help'
    • Linus Torvalds's avatar
      Merge tag 'binfmt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/binfmt_misc · e9d488c3
      Linus Torvalds authored
      Pull binfmt_misc update from James Bottomley:
       "This update is to allow architecture emulation containers to function
        such that the emulation binary can be housed outside the container
        itself.  The container and fs parts both have acks from relevant
        To use the new feature you have to add an F option to your binfmt_misc
      From the docs:
       "The usual behaviour of binfmt_misc is to spawn the binary lazily when
        the misc format file is invoked.  However, this doesn't work very well
        in the face of mount namespaces and changeroots, so the F mode opens
        the binary as soon as the emulation is installed and uses the opened
        image to spawn the emulator, meaning it is always available once
        installed, regardless of how the environment changes"
      * tag 'binfmt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/binfmt_misc:
        binfmt_misc: add F option description to documentation
        binfmt_misc: add persistent opened binary handler for containers
        fs: add filp_clone_open API
    • Eryu Guan's avatar
      fs: return EPERM on immutable inode · 337684a1
      Eryu Guan authored
      In most cases, EPERM is returned on immutable inode, and there're only a
      few places returning EACCES. I noticed this when running LTP on
      overlayfs, setxattr03 failed due to unexpected EACCES on immutable
      So converting all EACCES to EPERM on immutable inode.
      Acked-by: default avatarDave Chinner <dchinner@redhat.com>
      Signed-off-by: default avatarEryu Guan <guaneryu@gmail.com>
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · fe64f328
      Linus Torvalds authored
      Pull more vfs updates from Al Viro:
       "Assorted cleanups and fixes.
        In the "trivial API change" department - ->d_compare() losing 'parent'
      * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        cachefiles: Fix race between inactivating and culling a cache object
        9p: use clone_fid()
        9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()"
        vfs: make dentry_needs_remove_privs() internal
        vfs: remove file_needs_remove_privs()
        vfs: fix deadlock in file_remove_privs() on overlayfs
        get rid of 'parent' argument of ->d_compare()
        cifs, msdos, vfat, hfs+: don't bother with parent in ->d_compare()
        affs ->d_compare(): don't bother with ->d_inode
        fold _d_rehash() and __d_rehash() together
        fold dentry_rcuwalk_invalidate() into its only remaining caller
  6. 06 Aug, 2016 12 commits
    • Linus Torvalds's avatar
      Merge tag 'xfs-rmap-for-linus-4.8-rc1' of... · 0cbbc422
      Linus Torvalds authored
      Merge tag 'xfs-rmap-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
      Pull more xfs updates from Dave Chinner:
       "This is the second part of the XFS updates for this merge cycle, and
        contains the new reverse block mapping feature for XFS.
        Reverse mapping allows us to track the owner of a specific block on
        disk precisely.  It is implemented as a set of btrees (one per
        allocation group) that track the owners of allocated extents.
        Effectively it is a "used space tree" that is updated when we allocate
        or free extents.  i.e. it is coherent with the free space btrees we
        already maintain and never overlaps with them.
        This reverse mapping infrastructure is the building block of several
        upcoming features - reflink, copy-on-write data, dedupe, online
        metadata and data scrubbing, highly accurate bad sector/data loss
        reporting to users, and significantly improved reconstruction of
        damaged and corrupted filesystems.  There's a lot of new stuff coming
        along in the next couple of cycles,a nd it all builds in the rmap
        As such, it's a huge chunk of new code with new on-disk format
        features and internal infrastructure.  It warns at mount time as an
        experimental feature and that it may eat data (as we do with all new
        on-disk features until they stabilise).  We have not released
        userspace suport for it yet - userspace support currently requires
        download from Darrick's xfsprogs repo and build from source, so the
        access to this feature is really developer/tester only at this point.
        Initial userspace support will be released at the same time kernel
        with this code in it is released.
        The new rmap enabled code regresses 3 xfstests - all are ENOSPC
        related corner cases, one of which Darrick posted a fix for a few
        hours ago.  The other two are fixed by infrastructure that is part of
        the upcoming reflink patchset.  This new ENOSPC infrastructure
        requires a on-disk format tweak required to keep mount times in
        check - we need to keep an on-disk count of allocated rmapbt blocks so
        we don't have to scan the entire btrees at mount time to count them.
        This is currently being tested and will be part of the fixes sent in
        the next week or two so users will not be exposed to this change"
      * tag 'xfs-rmap-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (52 commits)
        xfs: move (and rename) the deferred bmap-free tracepoints
        xfs: collapse single use static functions
        xfs: remove unnecessary parentheses from log redo item recovery functions
        xfs: remove the extents array from the rmap update done log item
        xfs: in btree_lshift, only allocate temporary cursor when needed
        xfs: remove unnecesary lshift/rshift key initialization
        xfs: remove the get*keys and update_keys btree ops pointers
        xfs: enable the rmap btree functionality
        xfs: don't update rmapbt when fixing agfl
        xfs: disable XFS_IOC_SWAPEXT when rmap btree is enabled
        xfs: add rmap btree block detection to log recovery
        xfs: add rmap btree geometry feature flag
        xfs: propagate bmap updates to rmapbt
        xfs: enable the xfs_defer mechanism to process rmaps to update
        xfs: log rmap intent items
        xfs: create rmap update intent log items
        xfs: add rmap btree insert and delete helpers
        xfs: convert unwritten status of reverse mappings
        xfs: remove an extent from the rmap btree
        xfs: add an extent to the rmap btree
    • Linus Torvalds's avatar
      Merge branch 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 835c92d4
      Linus Torvalds authored
      Pull qstr constification updates from Al Viro:
       "Fairly self-contained bunch - surprising lot of places passes struct
        qstr * as an argument when const struct qstr * would suffice; it
        complicates analysis for no good reason.
        I'd prefer to feed that separately from the assorted fixes (those are
        in #for-linus and with somewhat trickier topology)"
      * 'work.const-qstr' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        qstr: constify instances in adfs
        qstr: constify instances in lustre
        qstr: constify instances in f2fs
        qstr: constify instances in ext2
        qstr: constify instances in vfat
        qstr: constify instances in procfs
        qstr: constify instances in fuse
        qstr constify instances in fs/dcache.c
        qstr: constify instances in nfs
        qstr: constify instances in ocfs2
        qstr: constify instances in autofs4
        qstr: constify instances in hfs
        qstr: constify instances in hfsplus
        qstr: constify instances in logfs
        qstr: constify dentry_init_security
    • Linus Torvalds's avatar
      Merge tag 'media/v4.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · ce804bf5
      Linus Torvalds authored
      Pull mailcap fixlets from Mauro Carvalho Chehab:
       "A small fixup for my and Shuah's entries in .mailcap.
        Basically, those entries were with a syntax that makes
        get_maintainer.pl to do the wrong thing"
      * tag 'media/v4.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        .mailmap: Correct entries for Mauro Carvalho Chehab and Shuah Khan
    • Linus Torvalds's avatar
      Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost · 0803e040
      Linus Torvalds authored
      Pull virtio/vhost updates from Michael Tsirkin:
       - new vsock device support in host and guest
       - platform IOMMU support in host and guest, including compatibility
         quirks for legacy systems.
       - misc fixes and cleanups.
      * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
        VSOCK: Use kvfree()
        vhost: split out vringh Kconfig
        vhost: detect 32 bit integer wrap around
        vhost: new device IOTLB API
        vhost: drop vringh dependency
        vhost: convert pre sorted vhost memory array to interval tree
        vhost: introduce vhost memory accessors
        VSOCK: Add Makefile and Kconfig
        VSOCK: Introduce vhost_vsock.ko
        VSOCK: Introduce virtio_transport.ko
        VSOCK: Introduce virtio_vsock_common.ko
        VSOCK: defer sock removal to transports
        VSOCK: transport-specific vsock_transport functions
        vhost: drop vringh dependency
        vop: pull in vhost Kconfig
        virtio: new feature to detect IOMMU device quirk
        balloon: check the number of available pages in leak balloon
        vhost: lockless enqueuing
        vhost: simplify work flushing
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 80fac0f5
      Linus Torvalds authored
      Pull more KVM updates from Paolo Bonzini:
       - ARM bugfix and MSI injection support
       - x86 nested virt tweak and OOPS fix
       - Simplify pvclock code (vdso bits acked by Andy Lutomirski).
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        nvmx: mark ept single context invalidation as supported
        nvmx: remove comment about missing nested vpid support
        KVM: lapic: fix access preemption timer stuff even if kernel_irqchip=off
        KVM: documentation: fix KVM_CAP_X2APIC_API information
        x86: vdso: use __pvclock_read_cycles
        pvclock: introduce seqcount-like API
        arm64: KVM: Set cpsr before spsr on fault injection
        KVM: arm: vgic-irqfd: Workaround changing kvm_set_routing_entry prototype
        KVM: arm/arm64: Enable MSI routing
        KVM: arm/arm64: Enable irqchip routing
        KVM: Move kvm_setup_default/empty_irq_routing declaration in arch specific header
        KVM: irqchip: Convey devid to kvm_set_msi
        KVM: Add devid in kvm_kernel_irq_routing_entry
        KVM: api: Pass the devid in the msi routing entry
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · 4305f424
      Linus Torvalds authored
      Pull MIPS updates from Ralf Baechle:
       "This is the main pull request for MIPS for 4.8.  Also includes is a
        minor SSB cleanup as SSB code traditionally is merged through the MIPS
          - MIPS: Add default configuration for ath25
          - For zboot, copy appended dtb to the end of the kernel
          - store the appended dtb address in a variable
          - Fix off by one error in offset allocation
        Cobalt code:
          - Fix typos
        Core code:
          - debugfs_create_file returns NULL on error, so don't use IS_ERR for
            testing for errors.
          - Fix double locking issue in RM7000 S-cache code.  This would only
            affect RM7000 ARC systems on reboot.
          - Fix page table corruption on THP permission changes.
          - Use compat_sys_keyctl for 32 bit userspace on 64 bit kernels.
            David says, there are no compatibility issues raised by this fix.
          - Move some signal code around.
          - Rewrite r4k count/compare clockevent device registration such that
            min_delta_ticks/max_delta_ticks files are guaranteed to be
          - Only register r4k count/compare as clockevent device if we can
            assume the clock to be constant.
          - Fix MSA asm warnings in control reg accessors
          - uasm and tlbex fixes and tweaking.
          - Print segment physical address when EU=1.
          - Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO.
          - CP: Allow booting by VP other than VP 0
          - Cache handling fixes and optimizations for r4k class caches
          - Add hotplug support for R6 processors
          - Cleanup hotplug bits in kconfig
          - traps: return correct si code for accessing nonmapped addresses
          - Remove cpu_has_safe_index_cacheops
          - Register IRQ handler for virtual IRQ number
          - Fix EIU interrupt loading code
          - Use the real EXIN count
          - Fix build error.
        Loongson 3:
          - Increase HPET_MIN_PROG_DELTA and decrease HPET_MIN_CYCLES
          - Delete built-in DTB pruning code for D-Link DSR-1000N.
          - Clean up GPIO definitions in dlink_dsr-1000n.dts.
          - Add more LEDs to the DSR-100n DTS
          - Fix off by one in octeon_irq_gpio_map()
          - Typo fixes
          - Enable SATA by default in cavium_octeon_defconfig
          - Support readq/writeq()
          - Remove forced mappings of USB interrupts.
          - Ensure DMA descriptors are always in the low 4GB
          - Improve USB reset code for OCTEON II.
          - Add maintainers entry for pistachio SoC Support
          - Remove plat_setup_iocoherency
          - Fix pwm UART in spis group pinmux.
          - Change bare unsigned to unsigned int to suit coding style
          - Fix reloc tool compiler warnings.
          - Delete use of ARCH_WANT_OPTIONAL_GPIOLIB"
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (61 commits)
        MIPS: mm: Fix definition of R6 cache instruction
        MIPS: tools: Fix relocs tool compiler warnings
        MIPS: Cobalt: Fix typo
        MIPS: Octeon: Fix typo
        MIPS: Lantiq: Fix build failure
        MIPS: Use CPHYSADDR to implement mips32 __pa
        MIPS: Octeon: Dlink_dsr-1000n.dts: add more leds.
        MIPS: Octeon: Clean up GPIO definitions in dlink_dsr-1000n.dts.
        MIPS: Octeon: Delete built-in DTB pruning code for D-Link DSR-1000N.
        MIPS: store the appended dtb address in a variable
        MIPS: ZBOOT: copy appended dtb to the end of the kernel
        MIPS: ralink: fix spis group pinmux
        MIPS: Factor o32 specific code into signal_o32.c
        MIPS: non-exec stack & heap when non-exec PT_GNU_STACK is present
        MIPS: Use per-mm page to execute branch delay slot instructions
        MIPS: Modify error handling
        MIPS: c-r4k: Use SMP calls for CM indexed cache ops
        MIPS: c-r4k: Avoid small flush_icache_range SMP calls
        MIPS: c-r4k: Local flush_icache_range cache op override
        MIPS: c-r4k: Split r4k_flush_kernel_vmap_range()
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · db826278
      Linus Torvalds authored
      Pull perf updates from Ingo Molnar:
       "Mostly tooling fixes and some late tooling updates, plus two perf
        related printk message fixes"
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf tests bpf: Use SyS_epoll_wait alias
        perf tests: objdump output can contain multi byte chunks
        perf record: Add --sample-cpu option
        perf hists: Introduce output_resort_cb method
        perf tools: Move config/Makefile into Makefile.config
        perf tests: Add test for bitmap_scnprintf function
        tools lib: Add bitmap_and function
        tools lib: Add bitmap_scnprintf function
        tools lib: Add bitmap_alloc function
        tools lib traceevent: Ignore generated library files
        perf tools: Fix build failure on perl script context
        perf/core: Change log level for duration warning to KERN_INFO
        perf annotate: Plug filename string leak
        perf annotate: Introduce strerror for handling symbol__disassemble() errors
        perf annotate: Rename symbol__annotate() to symbol__disassemble()
        perf/x86: Modify error message in virtualized environment
        perf target: str_error_r() always returns the buffer it receives
        perf annotate: Use pipe + fork instead of popen
        perf evsel: Introduce constructor for cycles event
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · c98f5827
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "Two fixes and a cleanup-fix, to the syscall entry code and to ptrace"
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/syscalls/64: Add compat_sys_keyctl for 32-bit userspace
        x86/ptrace: Stop setting TS_COMPAT in ptrace code
        x86/vdso: Error out if the vDSO isn't a valid DSO
    • Linus Torvalds's avatar
      Merge tag 'sh-for-4.8' of git://git.libc.org/linux-sh · 1630e843
      Linus Torvalds authored
      Pull arch/sh updates from Rich Felker:
       "These changes improve device tree support (including builtin DTB), add
        support for the J-Core J2 processor, an open source synthesizable
        reimplementation of the SH-2 ISA, resolve a longstanding sigcontext
        ABI mismatch issue, and fix various bugs including nommu-specific
        issues and minor regressions introduced in 4.6.
        The J-Core arch support is included here but to be usable it needs
        drivers that are waiting on approval/inclusion from their subsystem
      * tag 'sh-for-4.8' of git://git.libc.org/linux-sh: (23 commits)
        sh: add device tree source for J2 FPGA on Mimas v2 board
        sh: add defconfig for J-Core J2
        sh: use common clock framework with device tree boards
        sh: system call wire up
        sh: Delete unnecessary checks before the function call "mempool_destroy"
        sh: do not perform IPI-based cache flush except on boards that need it
        sh: add SMP support for J2
        sh: SMP support for SH2 entry.S
        sh: add working futex atomic ops on userspace addresses for smp
        sh: add J2 atomics using the cas.l instruction
        sh: add AT_HWCAP flag for J-Core cas.l instruction
        sh: add support for J-Core J2 processor
        sh: fix build regression with CONFIG_OF && !CONFIG_OF_FLATTREE
        sh: allow clocksource drivers to register sched_clock backends
        sh: make heartbeat driver explicitly non-modular
        sh: make board-secureedge5410 explicitly non-modular
        sh: make mm/asids-debugfs explicitly non-modular
        sh: make time.c explicitly non-modular
        sh: fix futex/robust_list on nommu models
        sh: disable aliased page logic on NOMMU models
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 194d6ad3
      Linus Torvalds authored
      Pull arm64 fixes from Will Deacon:
       - fix HugeTLB leak due to CoW and PTE_RDONLY mismatch
       - avoid accessing unmapped FDT fields when checking validity
       - correctly account for vDSO AUX entry in ARCH_DLINFO
       - fix kallsyms with absolute expressions in linker script
       - kill unnecessary symbol-based relocs in vmlinux
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: Fix copy-on-write referencing in HugeTLB
        arm64: mm: avoid fdt_check_header() before the FDT is fully mapped
        arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
        arm64: relocatable: suppress R_AARCH64_ABS64 relocations in vmlinux
        arm64: vmlinux.lds: make __rela_offset and __dynsym_offset ABSOLUTE
    • Linus Torvalds's avatar
      Merge tag 'pwm/for-4.8-rc1' of... · a157b3aa
      Linus Torvalds authored
      Merge tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
      Pull pwm updates from Thierry Reding:
       "This set of changes improve some aspects of the atomic API as well as
        make use of this new API in the regulator framework to allow properly
        dealing with critical regulators controlled by a PWM.
        Aside from that there's a bunch of updates and cleanups for existing
        drivers, as well as the addition of new drivers for the Broadcom
        iProc, STMPE and ChromeOS EC controllers"
      * tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (44 commits)
        regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range
        regulator: pwm: Support extra continuous mode cases
        pwm: Add ChromeOS EC PWM driver
        dt-bindings: pwm: Add binding for ChromeOS EC PWM
        mfd: cros_ec: Add EC_PWM function definitions
        mfd: cros_ec: Add cros_ec_cmd_xfer_status() helper
        pwm: atmel: Use of_device_get_match_data()
        pwm: atmel: Fix checkpatch warnings
        pwm: atmel: Fix disabling of PWM channels
        dt-bindings: pwm: Add R-Car H3 device tree bindings
        pwm: rcar: Use ARCH_RENESAS
        pwm: tegra: Add support for Tegra186
        dt-bindings: pwm: tegra: Add compatible string for Tegra186
        pwm: tegra: Avoid overflow when calculating duty cycle
        pwm: tegra: Allow 100 % duty cycle
        pwm: tegra: Add support for reset control
        pwm: tegra: Rename mmio_base to regs
        pwm: tegra: Remove useless padding
        pwm: tegra: Drop NUM_PWM macro
        pwm: lpc32xx: Set PWM_PIN_LEVEL bit to default value
    • Linus Torvalds's avatar
      Merge tag 'ntb-4.8' of git://github.com/jonmason/ntb · 32199ec3
      Linus Torvalds authored
      Pull NTB updates from Jon Mason:
       "NTB bug fixes for the ntb_tool and ntb_perf, and improvements to the
        ntb_perf and ntb_pingpong for increased debugability.
        Also, modification to the ntb_transport layer to increase/decrease
        the number of transport entries depending on the ring size"
      * tag 'ntb-4.8' of git://github.com/jonmason/ntb:
        NTB: ntb_hw_intel: use local variable pdev
        NTB: ntb_hw_intel: show BAR size in debugfs info
        ntb_test: Add a selftest script for the NTB subsystem
        ntb_perf: clear link_is_up flag when the link goes down.
        ntb_pingpong: Add a debugfs file to get the ping count
        ntb_tool: Add link status and files to debugfs
        ntb_tool: Postpone memory window initialization for the user
        ntb_perf: Wait for link before running test
        ntb_perf: Return results by reading the run file
        ntb_perf: Improve thread handling to increase robustness
        ntb_perf: Schedule based on time not on performance
        ntb_transport: Check the number of spads the hardware supports
        ntb_tool: Add memory window debug support
        ntb_perf: Allow limiting the size of the memory windows
        NTB: allocate number transport entries depending on size of ring size
        ntb_tool: BUG: Ensure the buffer size is large enough to return all spads
        ntb_tool: Fix infinite loop bug when writing spad/peer_spad file