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  1. 20 Mar, 2019 2 commits
    • Nathan Chancellor's avatar
      pwm: img: Turn final 'else if' into 'else' in img_pwm_config · 44481955
      Nathan Chancellor authored 
      When building with -Wsometimes-uninitialized, Clang warns:

drivers/pwm/pwm-img.c:126:13: error: variable 'timebase' is used
uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]

The final else if functions as an else; make that explicit so that Clang
understands that timebase cannot be used uninitialized.

Link: https://github.com/ClangBuiltLinux/linux/issues/400Signed-off-by: default avatarNathan Chancellor <natechancellor@gmail.com>
Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
      44481955
    • Phong Hoang's avatar
      pwm: Fix deadlock warning when removing PWM device · 347ab948
      Phong Hoang authored 
      This patch fixes deadlock warning if removing PWM device
when CONFIG_PROVE_LOCKING is enabled.

This issue can be reproceduced by the following steps on
the R-Car H3 Salvator-X board if the backlight is disabled:

 # cd /sys/class/pwm/pwmchip0
 # echo 0 > export
 # ls
 device  export  npwm  power  pwm0  subsystem  uevent  unexport
 # cd device/driver
 # ls
 bind  e6e31000.pwm  uevent  unbind
 # echo e6e31000.pwm > unbind

[   87.659974] ======================================================
[   87.666149] WARNING: possible circular locking dependency detected
[   87.672327] 5.0.0 #7 Not tainted
[   87.675549] ------------------------------------------------------
[   87.681723] bash/2986 is trying to acquire lock:
[   87.686337] 000000005ea0e178 (kn->count#58){++++}, at: kernfs_remove_by_name_ns+0x50/0xa0
[   87.694528]
[   87.694528] but task is already holding lock:
[   87.700353] 000000006313b17c (pwm_lock){+.+.}, at: pwmchip_remove+0x28/0x13c
[   87.707405]
[   87.707405] which lock already depends on the new lock.
[   87.707405]
[   87.715574]
[   87.715574] the existing dependency chain (in reverse order) is:
[   87.723048]
[   87.723048] -> #1 (pwm_lock){+.+.}:
[   87.728017]        __mutex_lock+0x70/0x7e4
[   87.732108]        mutex_lock_nested+0x1c/0x24
[   87.736547]        pwm_request_from_chip.part.6+0x34/0x74
[   87.741940]        pwm_request_from_chip+0x20/0x40
[   87.746725]        export_store+0x6c/0x1f4
[   87.750820]        dev_attr_store+0x18/0x28
[   87.754998]        sysfs_kf_write+0x54/0x64
[   87.759175]        kernfs_fop_write+0xe4/0x1e8
[   87.763615]        __vfs_write+0x40/0x184
[   87.767619]        vfs_write+0xa8/0x19c
[   87.771448]        ksys_write+0x58/0xbc
[   87.775278]        __arm64_sys_write+0x18/0x20
[   87.779721]        el0_svc_common+0xd0/0x124
[   87.783986]        el0_svc_compat_handler+0x1c/0x24
[   87.788858]        el0_svc_compat+0x8/0x18
[   87.792947]
[   87.792947] -> #0 (kn->count#58){++++}:
[   87.798260]        lock_acquire+0xc4/0x22c
[   87.802353]        __kernfs_remove+0x258/0x2c4
[   87.806790]        kernfs_remove_by_name_ns+0x50/0xa0
[   87.811836]        remove_files.isra.1+0x38/0x78
[   87.816447]        sysfs_remove_group+0x48/0x98
[   87.820971]        sysfs_remove_groups+0x34/0x4c
[   87.825583]        device_remove_attrs+0x6c/0x7c
[   87.830197]        device_del+0x11c/0x33c
[   87.834201]        device_unregister+0x14/0x2c
[   87.838638]        pwmchip_sysfs_unexport+0x40/0x4c
[   87.843509]        pwmchip_remove+0xf4/0x13c
[   87.847773]        rcar_pwm_remove+0x28/0x34
[   87.852039]        platform_drv_remove+0x24/0x64
[   87.856651]        device_release_driver_internal+0x18c/0x21c
[   87.862391]        device_release_driver+0x14/0x1c
[   87.867175]        unbind_store+0xe0/0x124
[   87.871265]        drv_attr_store+0x20/0x30
[   87.875442]        sysfs_kf_write+0x54/0x64
[   87.879618]        kernfs_fop_write+0xe4/0x1e8
[   87.884055]        __vfs_write+0x40/0x184
[   87.888057]        vfs_write+0xa8/0x19c
[   87.891887]        ksys_write+0x58/0xbc
[   87.895716]        __arm64_sys_write+0x18/0x20
[   87.900154]        el0_svc_common+0xd0/0x124
[   87.904417]        el0_svc_compat_handler+0x1c/0x24
[   87.909289]        el0_svc_compat+0x8/0x18
[   87.913378]
[   87.913378] other info that might help us debug this:
[   87.913378]
[   87.921374]  Possible unsafe locking scenario:
[   87.921374]
[   87.927286]        CPU0                    CPU1
[   87.931808]        ----                    ----
[   87.936331]   lock(pwm_lock);
[   87.939293]                                lock(kn->count#58);
[   87.945120]                                lock(pwm_lock);
[   87.950599]   lock(kn->count#58);
[   87.953908]
[   87.953908]  *** DEADLOCK ***
[   87.953908]
[   87.959821] 4 locks held by bash/2986:
[   87.963563]  #0: 00000000ace7bc30 (sb_writers#6){.+.+}, at: vfs_write+0x188/0x19c
[   87.971044]  #1: 00000000287991b2 (&of->mutex){+.+.}, at: kernfs_fop_write+0xb4/0x1e8
[   87.978872]  #2: 00000000f739d016 (&dev->mutex){....}, at: device_release_driver_internal+0x40/0x21c
[   87.988001]  #3: 000000006313b17c (pwm_lock){+.+.}, at: pwmchip_remove+0x28/0x13c
[   87.995481]
[   87.995481] stack backtrace:
[   87.999836] CPU: 0 PID: 2986 Comm: bash Not tainted 5.0.0 #7
[   88.005489] Hardware name: Renesas Salvator-X board based on r8a7795 ES1.x (DT)
[   88.012791] Call trace:
[   88.015235]  dump_backtrace+0x0/0x190
[   88.018891]  show_stack+0x14/0x1c
[   88.022204]  dump_stack+0xb0/0xec
[   88.025514]  print_circular_bug.isra.32+0x1d0/0x2e0
[   88.030385]  __lock_acquire+0x1318/0x1864
[   88.034388]  lock_acquire+0xc4/0x22c
[   88.037958]  __kernfs_remove+0x258/0x2c4
[   88.041874]  kernfs_remove_by_name_ns+0x50/0xa0
[   88.046398]  remove_files.isra.1+0x38/0x78
[   88.050487]  sysfs_remove_group+0x48/0x98
[   88.054490]  sysfs_remove_groups+0x34/0x4c
[   88.058580]  device_remove_attrs+0x6c/0x7c
[   88.062671]  device_del+0x11c/0x33c
[   88.066154]  device_unregister+0x14/0x2c
[   88.070070]  pwmchip_sysfs_unexport+0x40/0x4c
[   88.074421]  pwmchip_remove+0xf4/0x13c
[   88.078163]  rcar_pwm_remove+0x28/0x34
[   88.081906]  platform_drv_remove+0x24/0x64
[   88.085996]  device_release_driver_internal+0x18c/0x21c
[   88.091215]  device_release_driver+0x14/0x1c
[   88.095478]  unbind_store+0xe0/0x124
[   88.099048]  drv_attr_store+0x20/0x30
[   88.102704]  sysfs_kf_write+0x54/0x64
[   88.106359]  kernfs_fop_write+0xe4/0x1e8
[   88.110275]  __vfs_write+0x40/0x184
[   88.113757]  vfs_write+0xa8/0x19c
[   88.117065]  ksys_write+0x58/0xbc
[   88.120374]  __arm64_sys_write+0x18/0x20
[   88.124291]  el0_svc_common+0xd0/0x124
[   88.128034]  el0_svc_compat_handler+0x1c/0x24
[   88.132384]  el0_svc_compat+0x8/0x18

The sysfs unexport in pwmchip_remove() is completely asymmetric
to what we do in pwmchip_add_with_polarity() and commit 0733424c
("pwm: Unexport children before chip removal") is a strong indication
that this was wrong to begin with. We should just move
pwmchip_sysfs_unexport() where it belongs, which is right after
pwmchip_sysfs_unexport_children(). In that case, we do not need
separate functions anymore either.

We also really want to remove sysfs irrespective of whether or not
the chip will be removed as a result of pwmchip_remove(). We can only
assume that the driver will be gone after that, so we shouldn't leave
any dangling sysfs files around.

This warning disappears if we move pwmchip_sysfs_unexport() to
the top of pwmchip_remove(), pwmchip_sysfs_unexport_children().
That way it is also outside of the pwm_lock section, which indeed
doesn't seem to be needed.

Moving the pwmchip_sysfs_export() call outside of that section also
seems fine and it'd be perfectly symmetric with pwmchip_remove() again.

So, this patch fixes them.
Signed-off-by: default avatarPhong Hoang <phong.hoang.wz@renesas.com>
[shimoda: revise the commit log and code]
Fixes: 76abbdde ("pwm: Add sysfs interface")
Fixes: 0733424c ("pwm: Unexport children before chip removal")
Signed-off-by: default avatarYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: default avatarHoan Nguyen An <na-hoan@jinso.co.jp>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarSimon Horman <horms+renesas@verge.net.au>
Reviewed-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
      347ab948
  3. 17 Mar, 2019 14 commits
  5. 16 Mar, 2019 9 commits
    • Linus Torvalds's avatar
      Merge tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux · a9dce667
      Linus Torvalds authored 
      Pull pidfd system call from Christian Brauner:
 "This introduces the ability to use file descriptors from /proc/<pid>/
  as stable handles on struct pid. Even if a pid is recycled the handle
  will not change. For a start these fds can be used to send signals to
  the processes they refer to.

  With the ability to use /proc/<pid> fds as stable handles on struct
  pid we can fix a long-standing issue where after a process has exited
  its pid can be reused by another process. If a caller sends a signal
  to a reused pid it will end up signaling the wrong process.

  With this patchset we enable a variety of use cases. One obvious
  example is that we can now safely delegate an important part of
  process management - sending signals - to processes other than the
  parent of a given process by sending file descriptors around via scm
  rights and not fearing that the given process will have been recycled
  in the meantime. It also allows for easy testing whether a given
  process is still alive or not by sending signal 0 to a pidfd which is
  quite handy.

  There has been some interest in this feature e.g. from systems
  management (systemd, glibc) and container managers. I have requested
  and gotten comments from glibc to make sure that this syscall is
  suitable for their needs as well. In the future I expect it to take on
  most other pid-based signal syscalls. But such features are left for
  the future once they are needed.

  This has been sitting in linux-next for quite a while and has not
  caused any issues. It comes with selftests which verify basic
  functionality and also test that a recycled pid cannot be signaled via
  a pidfd.

  Jon has written about a prior version of this patchset. It should
  cover the basic functionality since not a lot has changed since then:

      https://lwn.net/Articles/773459/

  The commit message for the syscall itself is extensively documenting
  the syscall, including it's functionality and extensibility"

* tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  selftests: add tests for pidfd_send_signal()
  signal: add pidfd_send_signal() syscall
      a9dce667
    • Linus Torvalds's avatar
      Merge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · f67e3fb4
      Linus Torvalds authored 
      Pull device-dax updates from Dan Williams:
 "New device-dax infrastructure to allow persistent memory and other
  "reserved" / performance differentiated memories, to be assigned to
  the core-mm as "System RAM".

  Some users want to use persistent memory as additional volatile
  memory. They are willing to cope with potential performance
  differences, for example between DRAM and 3D Xpoint, and want to use
  typical Linux memory management apis rather than a userspace memory
  allocator layered over an mmap() of a dax file. The administration
  model is to decide how much Persistent Memory (pmem) to use as System
  RAM, create a device-dax-mode namespace of that size, and then assign
  it to the core-mm. The rationale for device-dax is that it is a
  generic memory-mapping driver that can be layered over any "special
  purpose" memory, not just pmem. On subsequent boots udev rules can be
  used to restore the memory assignment.

  One implication of using pmem as RAM is that mlock() no longer keeps
  data off persistent media. For this reason it is recommended to enable
  NVDIMM Security (previously merged for 5.0) to encrypt pmem contents
  at rest. We considered making this recommendation an actively enforced
  requirement, but in the end decided to leave it as a distribution /
  administrator policy to allow for emulation and test environments that
  lack security capable NVDIMMs.

  Summary:

   - Replace the /sys/class/dax device model with /sys/bus/dax, and
     include a compat driver so distributions can opt-in to the new ABI.

   - Allow for an alternative driver for the device-dax address-range

   - Introduce the 'kmem' driver to hotplug / assign a device-dax
     address-range to the core-mm.

   - Arrange for the device-dax target-node to be onlined so that the
     newly added memory range can be uniquely referenced by numa apis"

NOTE! I'm not entirely happy with the whole "PMEM as RAM" model because
we currently have special - and very annoying rules in the kernel about
accessing PMEM only with the "MC safe" accessors, because machine checks
inside the regular repeat string copy functions can be fatal in some
(not described) circumstances.

And apparently the PMEM modules can cause that a lot more than regular
RAM.  The argument is that this happens because PMEM doesn't necessarily
get scrubbed at boot like RAM does, but that is planned to be added for
the user space tooling.

Quoting Dan from another email:
 "The exposure can be reduced in the volatile-RAM case by scanning for
  and clearing errors before it is onlined as RAM. The userspace tooling
  for that can be in place before v5.1-final. There's also runtime
  notifications of errors via acpi_nfit_uc_error_notify() from
  background scrubbers on the DIMM devices. With that mechanism the
  kernel could proactively clear newly discovered poison in the volatile
  case, but that would be additional development more suitable for v5.2.

  I understand the concern, and the need to highlight this issue by
  tapping the brakes on feature development, but I don't see PMEM as RAM
  making the situation worse when the exposure is also there via DAX in
  the PMEM case. Volatile-RAM is arguably a safer use case since it's
  possible to repair pages where the persistent case needs active
  application coordination"

* tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  device-dax: "Hotplug" persistent memory for use like normal RAM
  mm/resource: Let walk_system_ram_range() search child resources
  mm/memory-hotplug: Allow memory resources to be children
  mm/resource: Move HMM pr_debug() deeper into resource code
  mm/resource: Return real error codes from walk failures
  device-dax: Add a 'modalias' attribute to DAX 'bus' devices
  device-dax: Add a 'target_node' attribute
  device-dax: Auto-bind device after successful new_id
  acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node
  device-dax: Add /sys/class/dax backwards compatibility
  device-dax: Add support for a dax override driver
  device-dax: Move resource pinning+mapping into the common driver
  device-dax: Introduce bus + driver model
  device-dax: Start defining a dax bus model
  device-dax: Remove multi-resource infrastructure
  device-dax: Kill dax_region base
  device-dax: Kill dax_region ida
      f67e3fb4
    • Linus Torvalds's avatar
      Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 477558d7
      Linus Torvalds authored 
      Pull more SCSI updates from James Bottomley:
 "This is the final round of mostly small fixes and performance
  improvements to our initial submit.

  The main regression fix is the ia64 simscsi build failure which was
  missed in the serial number elimination conversion"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (24 commits)
  scsi: ia64: simscsi: use request tag instead of serial_number
  scsi: aacraid: Fix performance issue on logical drives
  scsi: lpfc: Fix error codes in lpfc_sli4_pci_mem_setup()
  scsi: libiscsi: Hold back_lock when calling iscsi_complete_task
  scsi: hisi_sas: Change SERDES_CFG init value to increase reliability of HiLink
  scsi: hisi_sas: Send HARD RESET to clear the previous affiliation of STP target port
  scsi: hisi_sas: Set PHY linkrate when disconnected
  scsi: hisi_sas: print PHY RX errors count for later revision of v3 hw
  scsi: hisi_sas: Fix a timeout race of driver internal and SMP IO
  scsi: hisi_sas: Change return variable type in phy_up_v3_hw()
  scsi: qla2xxx: check for kstrtol() failure
  scsi: lpfc: fix 32-bit format string warning
  scsi: lpfc: fix unused variable warning
  scsi: target: tcmu: Switch to bitmap_zalloc()
  scsi: libiscsi: fall back to sendmsg for slab pages
  scsi: qla2xxx: avoid printf format warning
  scsi: lpfc: resolve static checker warning in lpfc_sli4_hba_unset
  scsi: lpfc: Correct __lpfc_sli_issue_iocb_s4 lockdep check
  scsi: ufs: hisi: fix ufs_hba_variant_ops passing
  scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show
  ...
      477558d7
    • Linus Torvalds's avatar
      Merge tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block · 11efae35
      Linus Torvalds authored 
      Pull more block layer changes from Jens Axboe:
 "This is a collection of both stragglers, and fixes that came in after
  I finalized the initial pull. This contains:

   - An MD pull request from Song, with a few minor fixes

   - Set of NVMe patches via Christoph

   - Pull request from Konrad, with a few fixes for xen/blkback

   - pblk fix IO calculation fix (Javier)

   - Segment calculation fix for pass-through (Ming)

   - Fallthrough annotation for blkcg (Mathieu)"

* tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits)
  blkcg: annotate implicit fall through
  nvme-tcp: support C2HData with SUCCESS flag
  nvmet: ignore EOPNOTSUPP for discard
  nvme: add proper write zeroes setup for the multipath device
  nvme: add proper discard setup for the multipath device
  nvme: remove nvme_ns_config_oncs
  nvme: disable Write Zeroes for qemu controllers
  nvmet-fc: bring Disconnect into compliance with FC-NVME spec
  nvmet-fc: fix issues with targetport assoc_list list walking
  nvme-fc: reject reconnect if io queue count is reduced to zero
  nvme-fc: fix numa_node when dev is null
  nvme-fc: use nr_phys_segments to determine existence of sgl
  nvme-loop: init nvmet_ctrl fatal_err_work when allocate
  nvme: update comment to make the code easier to read
  nvme: put ns_head ref if namespace fails allocation
  nvme-trace: fix cdw10 buffer overrun
  nvme: don't warn on block content change effects
  nvme: add get-feature to admin cmds tracer
  md: Fix failed allocation of md_register_thread
  It's wrong to add len to sector_nr in raid10 reshape twice
  ...
      11efae35
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 465c209d
      Linus Torvalds authored 
      Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Bugfixes:
   - Fix an Oops in SUNRPC back channel tracepoints
   - Fix a SUNRPC client regression when handling oversized replies
   - Fix the minimal size for SUNRPC reply buffer allocation
   - rpc_decode_header() must always return a non-zero value on error
   - Fix a typo in pnfs_update_layout()

  Cleanup:
   - Remove redundant check for the reply length in call_decode()"

* tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Remove redundant check for the reply length in call_decode()
  SUNRPC: Handle the SYSTEM_ERR rpc error
  SUNRPC: rpc_decode_header() must always return a non-zero value on error
  SUNRPC: Use the ENOTCONN error on socket disconnect
  SUNRPC: Fix the minimal size for reply buffer allocation
  SUNRPC: Fix a client regression when handling oversized replies
  pNFS: Fix a typo in pnfs_update_layout
  fix null pointer deref in tracepoints in back channel
      465c209d
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a9c55d58
      Linus Torvalds authored 
      Pull powerpc fixes from Michael Ellerman:
 "One fix to prevent runtime allocation of 16GB pages when running in a
  VM (as opposed to bare metal), because it doesn't work.

  A small fix to our recently added KCOV support to exempt some more
  code from being instrumented.

  Plus a few minor build fixes, a small dead code removal and a
  defconfig update.

  Thanks to: Alexey Kardashevskiy, Aneesh Kumar K.V, Christophe Leroy,
  Jason Yan, Joel Stanley, Mahesh Salgaonkar, Mathieu Malaterre"

* tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s: Include <asm/nmi.h> header file to fix a warning
  powerpc/powernv: Fix compile without CONFIG_TRACEPOINTS
  powerpc/mm: Disable kcov for SLB routines
  powerpc: remove dead code in head_fsl_booke.S
  powerpc/configs: Sync skiroot defconfig
  powerpc/hugetlb: Don't do runtime allocation of 16G pages in LPAR configuration
      a9c55d58
    • Linus Torvalds's avatar
      Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 92497350
      Linus Torvalds authored 
      Pull vfs mount infrastructure fix from Al Viro:
 "Fixup for sysfs braino.

  Capabilities checks for sysfs mount do include those on netns, but
  only if CONFIG_NET_NS is enabled. Sorry, should've caught that
  earlier..."

* 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix sysfs_init_fs_context() in !CONFIG_NET_NS case
      92497350
    • Al Viro's avatar
      fix sysfs_init_fs_context() in !CONFIG_NET_NS case · ab81dabd
      Al Viro authored 
      Permission checks on current's netns should be done only when
netns are enabled.
Reported-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
Fixes: 23bf1b6bSigned-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      ab81dabd
    • Linus Torvalds's avatar
      Merge tag '5.1-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6 · 9c7dc824
      Linus Torvalds authored 
      Pull more smb3 updates from Steve French:
 "Various tracing and debugging improvements, crediting fixes, some
  cleanup, and important fallocate fix (fixes three xfstests) and lock
  fix.

  Summary:

   - Various additional dynamic tracing tracepoints

   - Debugging improvements (including ability to query the server via
     SMB3 fsctl from userspace tools which can help with stats and
     debugging)

   - One minor performance improvement (root directory inode caching)

   - Crediting (SMB3 flow control) fixes

   - Some cleanup (docs and to mknod)

   - Important fixes: one to smb3 implementation of fallocate zero range
     (which fixes three xfstests) and a POSIX lock fix"

* tag '5.1-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6: (22 commits)
  CIFS: fix POSIX lock leak and invalid ptr deref
  SMB3: Allow SMB3 FSCTL queries to be sent to server from tools
  cifs: fix incorrect handling of smb2_set_sparse() return in smb3_simple_falloc
  smb2: fix typo in definition of a few error flags
  CIFS: make mknod() an smb_version_op
  cifs: minor documentation updates
  cifs: remove unused value pointed out by Coverity
  SMB3: passthru query info doesn't check for SMB3 FSCTL passthru
  smb3: add dynamic tracepoints for simple fallocate and zero range
  cifs: fix smb3_zero_range so it can expand the file-size when required
  cifs: add SMB2_ioctl_init/free helpers to be used with compounding
  smb3: Add dynamic trace points for various compounded smb3 ops
  cifs: cache FILE_ALL_INFO for the shared root handle
  smb3: display volume serial number for shares in /proc/fs/cifs/DebugData
  cifs: simplify how we handle credits in compound_send_recv()
  smb3: add dynamic tracepoint for timeout waiting for credits
  smb3: display security information in /proc/fs/cifs/DebugData more accurately
  cifs: add a timeout argument to wait_for_free_credits
  cifs: prevent starvation in wait_for_free_credits for multi-credit requests
  cifs: wait_for_free_credits() make it possible to wait for >=1 credits
  ...
      9c7dc824
  7. 15 Mar, 2019 15 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml · 6c83d0d5
      Linus Torvalds authored 
      Pull UML updates from Richard Weinberger:
 "Bugfix for the UML block device driver"

* 'for-linus-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: Fix for a possible OOPS in ubd initialization
  um: Remove duplicated include from vector_user.c
      6c83d0d5
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 636deed6
      Linus Torvalds authored 
      Pull KVM updates from Paolo Bonzini:
 "ARM:
   - some cleanups
   - direct physical timer assignment
   - cache sanitization for 32-bit guests

  s390:
   - interrupt cleanup
   - introduction of the Guest Information Block
   - preparation for processor subfunctions in cpu models

  PPC:
   - bug fixes and improvements, especially related to machine checks
     and protection keys

  x86:
   - many, many cleanups, including removing a bunch of MMU code for
     unnecessary optimizations
   - AVIC fixes

  Generic:
   - memcg accounting"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits)
  kvm: vmx: fix formatting of a comment
  KVM: doc: Document the life cycle of a VM and its resources
  MAINTAINERS: Add KVM selftests to existing KVM entry
  Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()"
  KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char()
  KVM: PPC: Fix compilation when KVM is not enabled
  KVM: Minor cleanups for kvm_main.c
  KVM: s390: add debug logging for cpu model subfunctions
  KVM: s390: implement subfunction processor calls
  arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2
  KVM: arm/arm64: Remove unused timer variable
  KVM: PPC: Book3S: Improve KVM reference counting
  KVM: PPC: Book3S HV: Fix build failure without IOMMU support
  Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()"
  x86: kvmguest: use TSC clocksource if invariant TSC is exposed
  KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start
  KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter
  KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns
  KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes()
  KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children
  ...
      636deed6
    • Linus Torvalds's avatar
      Merge tag 'trace-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · aa2e3ac6
      Linus Torvalds authored 
      Pull tracing fixes and cleanups from Steven Rostedt:
 "This contains a series of last minute clean ups, small fixes and error
  checks"

* tag 'trace-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing/probe: Verify alloc_trace_*probe() result
  tracing/probe: Check event/group naming rule at parsing
  tracing/probe: Check the size of argument name and body
  tracing/probe: Check event name length correctly
  tracing/probe: Check maxactive error cases
  tracing: kdb: Fix ftdump to not sleep
  trace/probes: Remove kernel doc style from non kernel doc comment
  tracing/probes: Make reserved_field_names static
      aa2e3ac6
    • Linus Torvalds's avatar
      Merge tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 323ea40f
      Linus Torvalds authored 
      Pull IOMMU fix from Joerg Roedel:
 "Fix a NULL-pointer dereference issue in the ACPI device matching code
  of the AMD IOMMU driver"

* tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix NULL dereference bug in match_hid_uid
      323ea40f
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm · 0be28863
      Linus Torvalds authored 
      Pull ARM updates from Russell King:

 - An improvement from Ard Biesheuvel, who noted that the identity map
   setup was taking a long time due to flush_cache_louis().

 - Update a comment about dma_ops from Wolfram Sang.

 - Remove use of "-p" with ld, where this flag has been a no-op since
   2004.

 - Remove the printing of the virtual memory layout, which is no longer
   useful since we hide pointers.

 - Correct SCU help text.

 - Remove legacy TWD registration method.

 - Add pgprot_device() implementation for mapping PCI sysfs resource
   files.

 - Initialise PFN limits earlier for kmemleak.

 - Fix argument count to match macro definition (affects clang builds)

 - Use unified assembler language almost everywhere for clang, and other
   clang improvements (from Stefan Agner, Nathan Chancellor).

 - Support security extension for noMMU and other noMMU cleanups (from
   Vladimir Murzin).

 - Remove unnecessary SMP bringup code (which was incorrectly copy'n'
   pasted from the ARM platform implementations) and remove it from the
   arch code to discourge further copys of it appearing.

 - Add Cortex A9 erratum preventing kexec working on some SoCs.

 - AMBA bus identification updates from Mike Leach.

 - More use of raw spinlocks to avoid -RT kernel issues (from Yang Shi
   and Sebastian Andrzej Siewior).

 - MCPM hyp/svc mode mismatch fixes from Marek Szyprowski.

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (32 commits)
  ARM: 8849/1: NOMMU: Fix encodings for PMSAv8's PRBAR4/PRLAR4
  ARM: 8848/1: virt: Align GIC version check with arm64 counterpart
  ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used
  ARM: 8845/1: use unified assembler in c files
  ARM: 8844/1: use unified assembler in assembly files
  ARM: 8843/1: use unified assembler in headers
  ARM: 8841/1: use unified assembler in macros
  ARM: 8840/1: use a raw_spinlock_t in unwind
  ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
  ARM: 8837/1: coresight: etmv4: Update ID register table to add UCI support
  ARM: 8836/1: drivers: amba: Update component matching to use the CoreSight UCI values.
  ARM: 8838/1: drivers: amba: Updates to component identification for driver matching.
  ARM: 8833/1: Ensure that NEON code always compiles with Clang
  ARM: avoid Cortex-A9 livelock on tight dmb loops
  ARM: smp: remove arch-provided "pen_release"
  ARM: actions: remove boot_lock and pen_release
  ARM: oxnas: remove CPU hotplug implementation
  ARM: qcom: remove unnecessary boot_lock
  ARM: 8832/1: NOMMU: Limit visibility for CONFIG_FLASH_{MEM_BASE,SIZE}
  ARM: 8831/1: NOMMU: pmsa-v8: remove unneeded semicolon
  ...
      0be28863
    • Linus Torvalds's avatar
      Merge tag 'ntb-5.1' of git://github.com/jonmason/ntb · e8a71a38
      Linus Torvalds authored 
      Pull NTB updates from Jon Mason:

 - fixes for switchtec debugability and mapping table entries

 - NTB transport improvements

 - a reworking of the peer_db_addr for better abstraction

* tag 'ntb-5.1' of git://github.com/jonmason/ntb:
  NTB: add new parameter to peer_db_addr() db_bit and db_data
  NTB: ntb_transport: Ensure the destination buffer is mapped for TX DMA
  NTB: ntb_transport: Free MWs in ntb_transport_link_cleanup()
  ntb_hw_switchtec: Added support of >=4G memory windows
  ntb_hw_switchtec: NT req id mapping table register entry number should be 512
  ntb_hw_switchtec: debug print 64bit aligned crosslink BAR Numbers
      e8a71a38
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v5.1' of git://github.com/bzolnier/linux · 2b9c272c
      Linus Torvalds authored 
      Pull fbdev updates from Bartlomiej Zolnierkiewicz:
 "Just a couple of small fixes and cleanups:

   - fix memory access if logo is bigger than the screen (Manfred
     Schlaegl)

   - silence fbcon logo on 'quiet' boots (Prarit Bhargava)

   - use kvmalloc() for scrollback buffer in fbcon (Konstantin Khorenko)

   - misc fixes (Colin Ian King, YueHaibing, Matteo Croce, Mathieu
     Malaterre, Anders Roxell, Arnd Bergmann)

   - misc cleanups (Rob Herring, Lubomir Rintel, Greg Kroah-Hartman,
     Jani Nikula, Michal Vokáč)"

* tag 'fbdev-v5.1' of git://github.com/bzolnier/linux:
  fbdev: mbx: fix a misspelled variable name
  fbdev: omap2: fix warnings in dss core
  video: fbdev: Fix potential NULL pointer dereference
  fbcon: Silence fbcon logo on 'quiet' boots
  printk: Export console_printk
  ARM: dts: imx28-cfa10036: Fix the reset gpio signal polarity
  video: ssd1307fb: Do not hard code active-low reset sequence
  dt-bindings: display: ssd1307fb: Remove reset-active-low from examples
  fbdev: fbmem: fix memory access if logo is bigger than the screen
  video/fbdev: refactor video= cmdline parsing
  fbdev: mbx: fix up debugfs file creation
  fbdev: omap2: no need to check return value of debugfs_create functions
  video: fbdev: geode: remove ifdef OLPC noise
  video: offb: annotate implicit fall throughs
  omapfb: fix typo
  fbdev: Use of_node_name_eq for node name comparisons
  fbcon: use kvmalloc() for scrollback buffer
  fbdev: chipsfb: remove set but not used variable 'size'
  fbdev/via: fix spelling mistake "Expandsion" -> "Expansion"
      2b9c272c
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 51b1ac0f
      Linus Torvalds authored 
      Pull i2c fixes from Wolfram Sang:
 "A set of driver bugfixes and an improvement for a core helper"

* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: i2c-designware-platdrv: Always use a dynamic adapter number
  i2c: i2c-designware-platdrv: Cleanup setting of the adapter number
  i2c: add extra check to safe DMA buffer helper
  i2c: i2c-stm32f7: Fix SDADEL minimum formula
  i2c: rcar: explain the lockless design
  i2c: rcar: fix concurrency issue related to ICDMAER
  i2c: sis630: correct format strings
  i2c: mediatek: modify threshold passed to i2c_get_dma_safe_msg_buf()
      51b1ac0f
    • Linus Torvalds's avatar
      Merge tag 'sound-fix-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 2dbb0e6c
      Linus Torvalds authored 
      Pull sound fixes from Takashi Iwai:
 "Some cleaning after the first batch; mostly about HD-audio quirks but
  also some NULL dereference fixes in corner cases and a random build
  error fix, too"

* tag 'sound-fix-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - Add support headset mode for New DELL WYSE NB
  ALSA: hda/realtek - Add support headset mode for DELL WYSE AIO
  ALSA: hda/realtek: merge alc_fixup_headset_jack to alc295_fixup_chromebook
  ALSA: pcm: Fix function name in kernel-doc comment
  ALSA: hda: hdmi - add Icelake support
  ALSA: hda - add more quirks for HP Z2 G4 and HP Z240
  ALSA: hda/realtek - Fixed Headset Mic JD not stable
  ALSA: hda/realtek: Enable headset MIC of Acer TravelMate X514-51T with ALC255
  ALSA: hda/tegra: avoid build error without CONFIG_PM
  ALSA: usx2y: Fix potential NULL pointer dereference
  ALSA: hda: Avoid NULL pointer dereference at snd_hdac_stream_start()
      2dbb0e6c
    • Linus Torvalds's avatar
      Merge tag 'drm-next-2019-03-15' of git://anongit.freedesktop.org/drm/drm · 8264fd04
      Linus Torvalds authored 
      Pull drm fixes and updates from Dave Airlie:
 "A few various fixes pulls and one late etnaviv pull but it was nearly
  all fixes anyways.

  etnaviv:
   - late next pull
   - mmu mapping fix
   - build non-ARM arches
   - misc fixes

  i915:
   - HDCP state handling fix
   - shrinker interaction fix
   - atomic state leak fix

  qxl:
   - kick out framebuffers early fix

  amdgpu:
   - Powerplay fixes
   - DC fixes
   - BACO turned off for now on vega20
   - Locking fix
   - KFD MQD fix
   - gfx9 golden register updates"

* tag 'drm-next-2019-03-15' of git://anongit.freedesktop.org/drm/drm: (43 commits)
  drm/amdgpu: Update gc golden setting for vega family
  drm/amd/powerplay: correct power reading on fiji
  drm/amd/powerplay: set max fan target temperature as 105C
  drm/i915: Relax mmap VMA check
  drm/i915: Fix atomic state leak when resetting HDMI link
  drm/i915: Acquire breadcrumb ref before cancelling
  drm/i915/selftests: Always free spinner on __sseu_prepare error
  drm/i915: Reacquire priolist cache after dropping the engine lock
  drm/i915: Protect i915_active iterators from the shrinker
  drm/i915: HDCP state handling in ddi_update_pipe
  drm/qxl: remove conflicting framebuffers earlier
  drm/fb-helper: call vga_remove_vgacon automatically.
  drm: move i915_kick_out_vgacon to vgaarb
  drm/amd/display: don't call dm_pp_ function from an fpu block
  drm: add __user attribute to ptr_to_compat()
  drm/amdgpu: clear PDs/PTs only after initializing them
  drm/amd/display: Pass app_tf by value rather than by reference
  Revert "drm/amdgpu: use BACO reset on vega20 if platform support"
  drm/amd/powerplay: show the right override pcie parameters
  drm/amd/powerplay: honor the OD settings
  ...
      8264fd04
    • Linus Torvalds's avatar
      Merge tag 'xfs-5.1-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · de578188
      Linus Torvalds authored 
      Pull xfs cleanups from Darrick Wong:
 "Here's a few more cleanups that trickled in for the merge window.

  It's all fixes for static checker complaints and slowly unwinding
  typedef usage. The four patches here have gone through a few days
  worth of fstest runs with no new problems observed.

  Summary:

   - Fix some clang/smatch/sparse warnings about uninitialized
     variables.

   - Clean up some typedef usage"

* tag 'xfs-5.1-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: clean up xfs_dir2_leaf_addname
  xfs: zero initialize highstale and lowstale in xfs_dir2_leaf_addname
  xfs: clean up xfs_dir2_leafn_add
  xfs: Zero initialize highstale and lowstale in xfs_dir2_leafn_add
      de578188
    • Linus Torvalds's avatar
      Merge tag 'f2fs-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs · 5160bcce
      Linus Torvalds authored 
      Pull f2fs updates from Jaegeuk Kim:
 "We've continued mainly to fix bugs in this round, as f2fs has been
  shipped in more devices. Especially, we've focused on stabilizing
  checkpoint=disable feature, and provided some interfaces for QA.

  Enhancements:
   - expose FS_NOCOW_FL for pin_file
   - run discard jobs at unmount time with timeout
   - tune discarding thread to avoid idling which consumes power
   - some checking codes to address vulnerabilities
   - give random value to i_generation
   - shutdown with more flags for QA

  Bug fixes:
   - clean up stale objects when mount is failed along with
     checkpoint=disable
   - fix system being stuck due to wrong count by atomic writes
   - handle some corrupted disk cases
   - fix a deadlock in f2fs_read_inline_dir

  We've also added some minor build error fixes and clean-up patches"

* tag 'f2fs-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (53 commits)
  f2fs: set pin_file under CAP_SYS_ADMIN
  f2fs: fix to avoid deadlock in f2fs_read_inline_dir()
  f2fs: fix to adapt small inline xattr space in __find_inline_xattr()
  f2fs: fix to do sanity check with inode.i_inline_xattr_size
  f2fs: give some messages for inline_xattr_size
  f2fs: don't trigger read IO for beyond EOF page
  f2fs: fix to add refcount once page is tagged PG_private
  f2fs: remove wrong comment in f2fs_invalidate_page()
  f2fs: fix to use kvfree instead of kzfree
  f2fs: print more parameters in trace_f2fs_map_blocks
  f2fs: trace f2fs_ioc_shutdown
  f2fs: fix to avoid deadlock of atomic file operations
  f2fs: fix to dirty inode for i_mode recovery
  f2fs: give random value to i_generation
  f2fs: no need to take page lock in readdir
  f2fs: fix to update iostat correctly in IPU path
  f2fs: fix encrypted page memory leak
  f2fs: make fault injection covering __submit_flush_wait()
  f2fs: fix to retry fill_super only if recovery failed
  f2fs: silence VM_WARN_ON_ONCE in mempool_alloc
  ...
      5160bcce
    • Linus Torvalds's avatar
      Merge branch 'akpm' (rest of patches from Andrew) · f91f2ee5
      Linus Torvalds authored 
      Merge the left-over patches from Andrew Morton.

This merges the remaining two patches from Andrew's pile of "little bit
more MM".  I mulled it over, and we emailed back and forth with Josef,
and he pointed out where I was wrong.

Rule #51 of kernel maintenance: when somebody makes it clear that they
know the code better than you did, stop arguing and just apply the damn
patch.

Add a third patch by me to add a comment for the case that I had thought
was buggy and Josef corrected me on.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  filemap: add a comment about FAULT_FLAG_RETRY_NOWAIT behavior
  filemap: drop the mmap_sem for all blocking operations
  filemap: kill page_cache_read usage in filemap_fault
      f91f2ee5
    • Linus Torvalds's avatar
      filemap: add a comment about FAULT_FLAG_RETRY_NOWAIT behavior · 8b0f9fa2
      Linus Torvalds authored 
      I thought Josef Bacik's patch to drop the mmap_sem was buggy, because
when looking at the error cases, there was one case where we returned
VM_FAULT_RETRY without actually dropping the mmap_sem.

Josef had to explain to me (using small words) that yes, that's actually
what we're supposed to do, and his patch was correct.  Which not only
convinced me he knew what he was doing and I should stop arguing with
him, but also that I should add a comment to the case I was confused
about.
Patiently-pointed-out-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      8b0f9fa2
    • Paolo Bonzini's avatar
      kvm: vmx: fix formatting of a comment · 4a605bc0
      Paolo Bonzini authored 
      Eliminate a gratuitous conflict with 5.0.
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      4a605bc0
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