1. 14 Apr, 2018 13 commits
  2. 13 Apr, 2018 5 commits
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-v4.17-rc1' of git://people.freedesktop.org/~airlied/linux · 16e205cf
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "One omap, and one alsa pm fix (we merged the breaking patch via drm
        tree).
      
        Otherwise it's two bunches of amdgpu fixes, removing an unneeded file,
        some DC fixes, HDMI audio regression fix, and some vega12 fixes"
      
      * tag 'drm-fixes-for-v4.17-rc1' of git://people.freedesktop.org/~airlied/linux: (27 commits)
        Revert "drm/amd/display: disable CRTCs with NULL FB on their primary plane (V2)"
        Revert "drm/amd/display: fix dereferencing possible ERR_PTR()"
        drm/amd/display: Fix regamma not affecting full-intensity color values
        drm/amd/display: Fix FBC text console corruption
        drm/amd/display: Only register backlight device if embedded panel connected
        drm/amd/display: fix brightness level after resume from suspend
        drm/amd/display: HDMI has no sound after Panel power off/on
        drm/amdgpu: add MP1 and THM hw ip base reg offset
        drm/amdgpu: fix null pointer panic with direct fw loading on gpu reset
        drm/radeon: add PX quirk for Asus K73TK
        drm/omap: fix crash if there's no video PLL
        drm/amdgpu: Fix memory leaks at amdgpu_init() error path
        drm/amdgpu: Fix PCIe lane width calculation
        drm/radeon: Fix PCIe lane width calculation
        drm/amdgpu/si: implement get/set pcie_lanes asic callback
        drm/amdgpu: Add support for SRBM selection v3
        Revert "drm/amdgpu: Don't change preferred domian when fallback GTT v5"
        drm/amd/powerply: fix power reading on Fiji
        drm/amd/powerplay: Enable ACG SS feature
        drm/amdgpu/sdma: fix mask in emit_pipeline_sync
        ...
      16e205cf
    • Linus Torvalds's avatar
      Merge tag 'trace-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · affb0280
      Linus Torvalds authored
      Pull tracing fixes from Steven Rostedt:
       "A few clean ups and bug fixes:
      
         - replace open coded "ARRAY_SIZE()" with macro
      
         - updates to uprobes
      
         - bug fix for perf event filter on error path"
      
      * tag 'trace-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Enforce passing in filter=NULL to create_filter()
        trace_uprobe: Simplify probes_seq_show()
        trace_uprobe: Use %lx to display offset
        tracing/uprobe: Add support for overlayfs
        tracing: Use ARRAY_SIZE() macro instead of open coding it
      affb0280
    • Alexey Dobriyan's avatar
      proc: fixup copyright sign · ee9294d6
      Alexey Dobriyan authored
      Add copyright in two files before they get autorubberstamped.
      Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ee9294d6
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.17-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 0c314a95
      Linus Torvalds authored
      Pull PCI fixes from Bjorn Helgaas:
      
       - mark Extended Tags as broken on Broadcom HT1100 and HT2000 Root Ports
         to fix drm/Xorg hangs and unresponsive keyboards (Sinan Kaya)
      
       - remove useless messages during resource reassignment (Desnes A. Nunes
         do Rosario)
      
      * tag 'pci-v4.17-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        PCI: Remove messages about reassigning resources
        PCI: Mark Broadcom HT1100 and HT2000 Root Port Extended Tags as broken
      0c314a95
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 681857ef
      Linus Torvalds authored
      Pull parisc updates from Helge Deller:
      
       - fix panic when halting system via "shutdown -h now"
      
       - drop own coding in favour of generic CONFIG_COMPAT_BINFMT_ELF
         implementation
      
       - add FPE_CONDTRAP constant: last outstanding parisc-specific cleanup
         for Eric Biedermans siginfo patches
      
       - move some functions to .init and some to .text.hot linker sections
      
      * 'parisc-4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Prevent panic at system halt
        parisc: Switch to generic COMPAT_BINFMT_ELF
        parisc: Move cache flush functions into .text.hot section
        parisc/signal: Add FPE_CONDTRAP for conditional trap handling
      681857ef
  3. 12 Apr, 2018 22 commits
    • Dave Airlie's avatar
      Merge branch 'drm-next-4.17' of git://people.freedesktop.org/~agd5f/linux into drm-next · a10beabb
      Dave Airlie authored
      - Add a PX quirk for radeon
      - Fix flickering and stability issues with DC on some platforms
      - Fix HDMI audio regression
      - Few other misc DC and base driver fixes
      
      * 'drm-next-4.17' of git://people.freedesktop.org/~agd5f/linux:
        Revert "drm/amd/display: disable CRTCs with NULL FB on their primary plane (V2)"
        Revert "drm/amd/display: fix dereferencing possible ERR_PTR()"
        drm/amd/display: Fix regamma not affecting full-intensity color values
        drm/amd/display: Fix FBC text console corruption
        drm/amd/display: Only register backlight device if embedded panel connected
        drm/amd/display: fix brightness level after resume from suspend
        drm/amd/display: HDMI has no sound after Panel power off/on
        drm/amdgpu: add MP1 and THM hw ip base reg offset
        drm/amdgpu: fix null pointer panic with direct fw loading on gpu reset
        drm/radeon: add PX quirk for Asus K73TK
      a10beabb
    • Dave Airlie's avatar
      Merge tag 'drm-misc-next-fixes-2018-04-11' of... · dece02f7
      Dave Airlie authored
      Merge tag 'drm-misc-next-fixes-2018-04-11' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
      
      omap: Fix crash on AM4 EVM, and all OMAP2/3 boards (Tomi)
      
      Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
      
      * tag 'drm-misc-next-fixes-2018-04-11' of git://anongit.freedesktop.org/drm/drm-misc:
        drm/omap: fix crash if there's no video PLL
      dece02f7
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.17-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 80aa76bc
      Linus Torvalds authored
      Pull more xfs updates from Darrick Wong:
       "Most of these are code cleanups, but there are a couple of notable
        use-after-free bug fixes.
      
        This series has been run through a full xfstests run over the week and
        through a quick xfstests run against this morning's master, with no
        major failures reported.
      
         - clean up unnecessary function call parameters
      
         - fix a use-after-free bug when aborting logging intents
      
         - refactor filestreams state data to avoid use-after-free bug
      
         - fix incorrect removal of cow extents when truncating extended
           attributes.
      
         - refactor open-coded __set_page_dirty in favor of using vfs
           function.
      
         - fix a deadlock when fstrim and fs shutdown race"
      
      * tag 'xfs-4.17-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        Force log to disk before reading the AGF during a fstrim
        Export __set_page_dirty
        xfs: only cancel cow blocks when truncating the data fork
        xfs: non-scrub - remove unused function parameters
        xfs: remove filestream item xfs_inode reference
        xfs: fix intent use-after-free on abort
        xfs: Remove "committed" argument of xfs_dir_ialloc
      80aa76bc
    • Linus Torvalds's avatar
      Merge tag 'gfs2-4.17.fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 · 4ac1800f
      Linus Torvalds authored
      Pull more gfs2 updates from Bob Peterson:
       "We decided to request the latest three patches to be merged into this
        merge window while it's still open.
      
         - The first patch adds a new function to lockref:
           lockref_put_not_zero
      
         - The second patch fixes GFS2's glock dump code so it uses the new
           lockref function. This fixes a problem whereby lock dumps could
           miss glocks.
      
         - I made a minor patch to update some comments and fix the lock
           ordering text in our gfs2-glocks.txt Documentation file"
      
      * tag 'gfs2-4.17.fixes2' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
        GFS2: Minor improvements to comments and documentation
        gfs2: Stop using rhashtable_walk_peek
        lockref: Add lockref_put_not_zero
      4ac1800f
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-4.17-1' of git://git.linux-nfs.org/projects/anna/linux-nfs · a1bf4c7d
      Linus Torvalds authored
      Pull NFS client updates from Anna Schumaker:
       "Stable bugfixes:
         - xprtrdma: Fix corner cases when handling device removal # v4.12+
         - xprtrdma: Fix latency regression on NUMA NFS/RDMA clients # v4.15+
      
        Features:
         - New sunrpc tracepoint for RPC pings
         - Finer grained NFSv4 attribute checking
         - Don't unnecessarily return NFS v4 delegations
      
        Other bugfixes and cleanups:
         - Several other small NFSoRDMA cleanups
         - Improvements to the sunrpc RTT measurements
         - A few sunrpc tracepoint cleanups
         - Various fixes for NFS v4 lock notifications
         - Various sunrpc and NFS v4 XDR encoding cleanups
         - Switch to the ida_simple API
         - Fix NFSv4.1 exclusive create
         - Forget acl cache after setattr operation
         - Don't advance the nfs_entry readdir cookie if xdr decoding fails"
      
      * tag 'nfs-for-4.17-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (47 commits)
        NFS: advance nfs_entry cookie only after decoding completes successfully
        NFSv3/acl: forget acl cache after setattr
        NFSv4.1: Fix exclusive create
        NFSv4: Declare the size up to date after it was set.
        nfs: Use ida_simple API
        NFSv4: Fix the nfs_inode_set_delegation() arguments
        NFSv4: Clean up CB_GETATTR encoding
        NFSv4: Don't ask for attributes when ACCESS is protected by a delegation
        NFSv4: Add a helper to encode/decode struct timespec
        NFSv4: Clean up encode_attrs
        NFSv4; Clean up XDR encoding of type bitmap4
        NFSv4: Allow GFP_NOIO sleeps in decode_attr_owner/decode_attr_group
        SUNRPC: Add a helper for encoding opaque data inline
        SUNRPC: Add helpers for decoding opaque and string types
        NFSv4: Ignore change attribute invalidations if we hold a delegation
        NFS: More fine grained attribute tracking
        NFS: Don't force unnecessary cache invalidation in nfs_update_inode()
        NFS: Don't redirty the attribute cache in nfs_wcc_update_inode()
        NFS: Don't force a revalidation of all attributes if change is missing
        NFS: Convert NFS_INO_INVALID flags to unsigned long
        ...
      a1bf4c7d
    • Linus Torvalds's avatar
      Merge branch 'work.thaw' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 7214dd4e
      Linus Torvalds authored
      Pull vfs thaw updates from Al Viro:
       "An ancient series that has fallen through the cracks in the previous
        cycle"
      
      * 'work.thaw' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        buffer.c: call thaw_super during emergency thaw
        vfs: factor sb iteration out of do_emergency_remount
      7214dd4e
    • Harry Wentland's avatar
      Revert "drm/amd/display: disable CRTCs with NULL FB on their primary plane (V2)" · 1cb19e82
      Harry Wentland authored
      This seems to cause flickering and lock-ups for a wide range of users.
      Revert until we've found a proper fix for the flickering and lock-ups.
      
      This reverts commit 36cc549d.
      
      Cc: Shirish S <shirish.s@amd.com>
      Cc: Alex Deucher <alexander.deucher@amd.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
      Signed-off-by: default avatarHarry Wentland <harry.wentland@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      1cb19e82
    • Linus Torvalds's avatar
      Merge branch 'afs-dh' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 19e8a2f8
      Linus Torvalds authored
      Pull AFS updates from Al Viro:
       "The AFS series posted by dhowells depended upon lookup_one_len()
        rework; now that prereq is in the mainline, that series had been
        rebased on top of it and got some exposure and testing..."
      
      * 'afs-dh' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        afs: Do better accretion of small writes on newly created content
        afs: Add stats for data transfer operations
        afs: Trace protocol errors
        afs: Locally edit directory data for mkdir/create/unlink/...
        afs: Adjust the directory XDR structures
        afs: Split the directory content defs into a header
        afs: Fix directory handling
        afs: Split the dynroot stuff out and give it its own ops tables
        afs: Keep track of invalid-before version for dentry coherency
        afs: Rearrange status mapping
        afs: Make it possible to get the data version in readpage
        afs: Init inode before accessing cache
        afs: Introduce a statistics proc file
        afs: Dump bad status record
        afs: Implement @cell substitution handling
        afs: Implement @sys substitution handling
        afs: Prospectively look up extra files when doing a single lookup
        afs: Don't over-increment the cell usage count when pinning it
        afs: Fix checker warnings
        vfs: Remove the const from dir_context::actor
      19e8a2f8
    • Harry Wentland's avatar
      Revert "drm/amd/display: fix dereferencing possible ERR_PTR()" · 1bc8ffbd
      Harry Wentland authored
      This reverts commit cd2d6c92.
      
      Cc: Shirish S <shirish.s@amd.com>
      Cc: Alex Deucher <alexander.deucher@amd.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
      Signed-off-by: default avatarHarry Wentland <harry.wentland@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      1bc8ffbd
    • Leo (Sunpeng) Li's avatar
      drm/amd/display: Fix regamma not affecting full-intensity color values · b2f3f592
      Leo (Sunpeng) Li authored
      Hardware understands the regamma LUT as a piecewise linear function,
      with points spaced exponentially along the range. We previously
      programmed the LUT for range [2^-10, 2^0). This causes (normalized)
      color values of 1 (=2^0) to miss the programmed LUT, and fall onto the
      end region.
      
      For DCE, the end region is extrapolated using a single (base, slope)
      pair, using the max y-value from the last point in the curve as base.
      This presents a problem, since this value affects all three color
      channels. Scaling down the intensity of say - the blue regamma curve -
      will not affect it's end region. This is especially noticiable when
      using RedShift. It scales down the blue and green channels, but leaves
      full-intensity colors unshifted.
      
      Therefore, extend the range to cover [2^-10, 2^1) by programming another
      hardware segment, containing only one point. That way, we won't be
      hitting the end region.
      
      Note that things are a bit different for DCN, since the end region can
      be set per-channel.
      Signed-off-by: default avatarLeo (Sunpeng) Li <sunpeng.li@amd.com>
      Reviewed-by: default avatarKrunoslav Kovac <Krunoslav.Kovac@amd.com>
      Acked-by: default avatarHarry Wentland <harry.wentland@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      b2f3f592
    • Roman Li's avatar
    • Harry Wentland's avatar
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 5d136594
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) In ip_gre tunnel, handle the conflict between TUNNEL_{SEQ,CSUM} and
          GSO/LLTX properly. From Sabrina Dubroca.
      
       2) Stop properly on error in lan78xx_read_otp(), from Phil Elwell.
      
       3) Don't uncompress in slip before rstate is initialized, from Tejaswi
          Tanikella.
      
       4) When using 1.x firmware on aquantia, issue a deinit before we
          hardware reset the chip, otherwise we break dirty wake WOL. From
          Igor Russkikh.
      
       5) Correct log check in vhost_vq_access_ok(), from Stefan Hajnoczi.
      
       6) Fix ethtool -x crashes in bnxt_en, from Michael Chan.
      
       7) Fix races in l2tp tunnel creation and duplicate tunnel detection,
          from Guillaume Nault.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (22 commits)
        l2tp: fix race in duplicate tunnel detection
        l2tp: fix races in tunnel creation
        tun: send netlink notification when the device is modified
        tun: set the flags before registering the netdevice
        lan78xx: Don't reset the interface on open
        bnxt_en: Fix NULL pointer dereference at bnxt_free_irq().
        bnxt_en: Need to include RDMA rings in bnxt_check_rings().
        bnxt_en: Support max-mtu with VF-reps
        bnxt_en: Ignore src port field in decap filter nodes
        bnxt_en: do not allow wildcard matches for L2 flows
        bnxt_en: Fix ethtool -x crash when device is down.
        vhost: return bool from *_access_ok() functions
        vhost: fix vhost_vq_access_ok() log check
        vhost: Fix vhost_copy_to_user()
        net: aquantia: oops when shutdown on already stopped device
        net: aquantia: Regression on reset with 1.x firmware
        cdc_ether: flag the Cinterion AHS8 modem by gemalto as WWAN
        slip: Check if rstate is initialized before uncompressing
        lan78xx: Avoid spurious kevent 4 "error"
        lan78xx: Correctly indicate invalid OTP
        ...
      5d136594
    • Linus Torvalds's avatar
      Merge tag 'for-linus-4.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · 67a7a8ff
      Linus Torvalds authored
      Pull xen fixes from Juergen Gross:
       "A few fixes of Xen related core code and drivers"
      
      * tag 'for-linus-4.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen/pvh: Indicate XENFEAT_linux_rsdp_unrestricted to Xen
        xen/acpi: off by one in read_acpi_id()
        xen/acpi: upload _PSD info for non Dom0 CPUs too
        x86/xen: Delay get_cpu_cap until stack canary is established
        xen: xenbus_dev_frontend: Verify body of XS_TRANSACTION_END
        xen: xenbus: Catch closing of non existent transactions
        xen: xenbus_dev_frontend: Fix XS_TRANSACTION_END handling
      67a7a8ff
    • Linus Torvalds's avatar
      Merge tag 'dma-mapping-4.17-2' of git://git.infradead.org/users/hch/dma-mapping · c5c177c5
      Linus Torvalds authored
      Pull dma-mapping fix from Christoph Hellwig:
       "Fix for one swiotlb regression in 2.16 from Takashi"
      
      * tag 'dma-mapping-4.17-2' of git://git.infradead.org/users/hch/dma-mapping:
        swiotlb: fix unexpected swiotlb_alloc_coherent failures
      c5c177c5
    • Linus Torvalds's avatar
      Merge tag 'mmc-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc · d1cb7718
      Linus Torvalds authored
      Pull MMC fixes from Ulf Hansson:
       "MMC core:
         - Prevent bus reference leak in mmc_blk_init()
      
        MMC host:
         - tmio: Fix error handling when issuing CMD23
         - jz4740: Fix race condition in IRQ mask update"
      
      * tag 'mmc-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
        mmc: tmio: Fix error handling when issuing CMD23
        mmc: core: Prevent bus reference leak in mmc_blk_init()
        mmc: jz4740: Fix race condition in IRQ mask update
      d1cb7718
    • Linus Torvalds's avatar
      Merge tag 'for_linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb · cb098d50
      Linus Torvalds authored
      Pull kdb updates from Jason Wessel:
      
       - fix 2032 time access issues and new compiler warnings
      
       - minor regression test cleanup
      
       - formatting fixes for end user use of kdb
      
      * tag 'for_linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb:
        kdb: use memmove instead of overlapping memcpy
        kdb: use ktime_get_mono_fast_ns() instead of ktime_get_ts()
        kdb: bl: don't use tab character in output
        kdb: drop newline in unknown command output
        kdb: make "mdr" command repeat
        kdb: use __ktime_get_real_seconds instead of __current_kernel_time
        misc: kgdbts: Display progress of asynchronous tests
      cb098d50
    • Linus Torvalds's avatar
      Merge tag 'microblaze-4.17-rc1' of git://git.monstr.eu/linux-2.6-microblaze · 07820c3b
      Linus Torvalds authored
      Pull microblaze updates from Michal Simek:
       "Use generic pci_mmap_resource_range()"
      
      * tag 'microblaze-4.17-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
        microblaze: Use generic pci_mmap_resource_range()
        microblaze: Provide pgprot_device/writecombine macros for nommu
      07820c3b
    • Bob Peterson's avatar
      GFS2: Minor improvements to comments and documentation · 3e7aafc3
      Bob Peterson authored
      This patch simply fixes some comments and the gfs2-glocks.txt file:
      Places where i_rwsem was called i_mutex, and adding i_rw_mutex.
      Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
      3e7aafc3
    • Andreas Gruenbacher's avatar
      gfs2: Stop using rhashtable_walk_peek · 3fd5d3ad
      Andreas Gruenbacher authored
      Function rhashtable_walk_peek is problematic because there is no
      guarantee that the glock previously returned still exists; when that key
      is deleted, rhashtable_walk_peek can end up returning a different key,
      which will cause an inconsistent glock dump.  Fix this by keeping track
      of the current glock in the seq file iterator functions instead.
      Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
      Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
      3fd5d3ad
    • Andreas Gruenbacher's avatar
      lockref: Add lockref_put_not_zero · 450b1f6f
      Andreas Gruenbacher authored
      Put a lockref unless the lockref is dead or its count would become zero.
      This is the same as lockref_put_or_lock except that the lock is never
      left held.
      Signed-off-by: default avatarAndreas Gruenbacher <agruenba@redhat.com>
      Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
      450b1f6f
    • Linus Torvalds's avatar
      Merge tag 'asm-generic' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic · c17b0aad
      Linus Torvalds authored
      Pull asm-generic fixes from Arnd Bergmann:
       "I have one regression fix for a minor build problem after the
        architecture removal series, plus a rework of the barriers in the
        readl/writel functions, thanks to work by Sinan Kaya:
      
        This started from a discussion on the linuxpcc and rdma mailing
        lists[1]. To summarize, we decided that architectures are responsible
        to serialize readl() and writel() accesses on a device MMIO space
        relative to DMA performed by that device.
      
        This series provides a pessimistic implementation of that behavior for
        asm-generic/io.h, which is in turn used by a number of architectures
        (h8300, microblaze, nios2, openrisc, s390, sparc, um, unicore32, and
        xtensa). Some of those presumably need no extra barriers, or something
        weaker than rmb()/wmb(), and they are advised to override the new
        default for better performance.
      
        For inb()/outb(), the same barriers are used, but architectures might
        want to add another barrier to outb() here if that can guarantee
        non-posted behavior (some architectures can, others cannot do that).
      
        The readl_relaxed()/writel_relaxed() family of functions retains the
        existing behavior with no extra barriers"
      
      [1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2018-March/170481.html
      
      * tag 'asm-generic' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
        io: change writeX_relaxed() to remove barriers
        io: change readX_relaxed() to remove barriers
        dts: remove cris & metag dts hard link file
        io: change inX() to have their own IO barrier overrides
        io: change outX() to have their own IO barrier overrides
        io: define stronger ordering for the default writeX() implementation
        io: define stronger ordering for the default readX() implementation
        io: define several IO & PIO barrier types for the asm-generic version
      c17b0aad