Several configurable fields of the Device Descriptor and the Unit
Descriptors determine the Boot LUN status. The bBootEnable field and the
bBootLunEn attribute is set to zero by default, so the Boot LUN is
disabled by default.

At which point the scsi device add for Boot LUN will fail, but we can
continue to use the ufs device in fact. This failure shouldn't abort the
device boot.
Signed-off-by: Huanlin Ke <kehuanlin@pinecone.net>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Zang Leigang <zangleigang@hisilicon.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Zang Leigang <zangleigang@hisilicon.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Since right after the user copy, we are going to memset(&karg, 0,
sizeof(karg)), the copy_from_user is redundant
Signed-off-by: Meng Xu <mengxu.gatech@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0.
Found by coccinelle spatch "api/alloc/pool_zalloc-simple.cocci"
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Use *_pool_zalloc rather than *_pool_alloc followed by memset with 0.
Found by coccinelle spatch "api/alloc/pool_zalloc-simple.cocci"
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Device handlers are optional, and for some handlers like ALUA only
implemented for certain device types.  So suppress any errors for
unsupported devices.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Rather than having each device handler implementing their own error
mapping, have the ->attach() call return a SCSI_DH_XXX error code and
implement the mapping in scsi_dh_handler_attach().
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Reporting a maximum number of blocks that is not aligned on the device
physical size would cause a large write same request to be split into
physically unaligned chunks by __blkdev_issue_write_zeroes() and
__blkdev_issue_write_same(), even if the caller of these functions took
care to align its request to physical sectors.

Make sure the maximum reported is aligned to the device physical block
size. This is only an optional optimization for regular disks, but this
is mandatory to avoid failure of large write same requests directed at
sequential write required zones of host-managed ZBC disks.

[mkp: tweaked commit message]
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Set PCIe relaxed ordering bits in FW_IQ_CMD if relaxed ordering is
enabled in the PCIe device.
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

csk is always null on the error return path and so the non-null check
and call to cxgbi_sock_closed on csk is redundant and can be removed.

Detected by: CoverityScan CID#114329 ("Logically dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Events will be added to defer_q list when setting ha->status to
SAS_HA_DRAINING. Events will be called after drain workqueue.

Those events are added to the head of list, but they are scanned one by
one from the head to the tail, which will cause those events be called
in the reverse order of being added. So change list_add to list_add_tail
in function sas_queue_work.
Signed-off-by: chenxiang <chenxiang66@hisilicon.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Rename function notify_port_event() to sas_notify_port_event(), which
will be consistent with sas_notify_phy_event().
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

No one uses the port_gone_completion in struct asd_sas_port and
DISCE_PORT_GONE in enum disover_event, clean them out.
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Numbering for each event enum makes no sense. Remove the numbering so
that we don't have to calculate the number by hand every time.
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The ha_event now has only one event HAE_RESET, and this event does
nothing. Kill it and do some cleanup.

This is a preparation for enhance libsas hotplug feature in the next
patches.
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When a NETDEV_UNREGISTER notification is received the network device is
_deleted_ after the callback returns.  So we cannot use a workqueue
here, as this would cause an inversion when removing the device as the
netdev is already gone.  This manifests with a nasty warning during
shutdown:

sysfs group ffffffff81eff0e0 not found for kobject 'fc_host7'

So open-code fcoe_destroy_work() when receiving the notification to
avoid this inversion.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Separate out fcoe_vport_remove() from fcoe_destroy_work().  Required for
the next patch.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This closes a possible race condition in _fcoe_create() where we drop
the rtnl_lock() before calling fcoe_interface_remove().
Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Don't populate const arrays on the stack, instead make them static.
Makes the object code smaller by over 740 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
   3840	    208	      0	   4048	    fd0	drivers/scsi/ufs/tc-dwc-g210.o

After:
   text	   data	    bss	    dec	    hex	filename
   2679	    624	      0	   3303	    ce7	drivers/scsi/ufs/tc-dwc-g210.o
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Pointers bnx2i_cmd are set but never used, so they can be removed.
Signed-off-by: Christos Gkekas <chris.gekas@gmail.com>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The pointer eqe is always non-null inside the while loop, so the check
to see if eqe is NULL is redudant and hence can be removed.

Detected by CoverityScan CID#1248693 ("Logically Dead Code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Another merge window, another MAINTAINERS file disaster.

People have serious problems with the alphabet and sorting, and poor
Jérôme Glisse and Radim Krčmář get their names mangled by locale issues,
turning them into some mangled mess (probably others do too, but those
two stood out when sorting things again).

And we now have two copies of the same 'AS3645A LED FLASH CONTROLLER
DRIVER' in the tree and in the MAINTAINERS file, but that's a separate
issue - the duplication is real, and I left them as two entries for the
same name.

This does not try to sort the actual section pattern entries, although I
may end up doing that later.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull clk updates from Stephen Boyd:
 "The diff is dominated by the Allwinner A10/A20 SoCs getting converted
  to the sunxi-ng framework. Otherwise, the heavy hitters are various
  drivers for SoCs like AT91, Amlogic, Renesas, and Rockchip. There are
  some other new clk drivers in here too but overall this is just a
  bunch of clk drivers for various different pieces of hardware and a
  collection of non-critical fixes for clk drivers.

  New Drivers:
   - Allwinner R40 SoCs
   - Renesas R-Car Gen3 USB 2.0 clock selector PHY
   - Atmel AT91 audio PLL
   - Uniphier PXs3 SoCs
   - ARC HSDK Board PLLs
   - AXS10X Board PLLs
   - STMicroelectronics STM32H743 SoCs

  Removed Drivers:
   - Non-compiling mb86s7x support

  Updates:
   - Allwinner A10/A20 SoCs converted to sunxi-ng framework
   - Allwinner H3 CPU clk fixes
   - Renesas R-Car D3 SoC
   - Renesas V2H and M3-W modules
   - Samsung Exynos5420/5422/5800 audio fixes
   - Rockchip fractional clk approximation fixes
   - Rockchip rk3126 SoC support within the rk3128 driver
   - Amlogic gxbb CEC32 and sd_emmc clks
   - Amlogic meson8b reset controller support
   - IDT VersaClock 5P49V5925/5P49V6901 support
   - Qualcomm MSM8996 SMMU clks
   - Various 'const' applications for struct clk_ops
   - si5351 PLL reset bugfix
   - Uniphier audio on LD11/LD20 and ethernet support on LD11/LD20/Pro4/PXs2
   - Assorted Tegra clk driver fixes"

* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (120 commits)
  clk: si5351: fix PLL reset
  ASoC: atmel-classd: remove aclk clock
  ASoC: atmel-classd: remove aclk clock from DT binding
  clk: at91: clk-generated: make gclk determine audio_pll rate
  clk: at91: clk-generated: create function to find best_diff
  clk: at91: add audio pll clock drivers
  dt-bindings: clk: at91: add audio plls to the compatible list
  clk: at91: clk-generated: remove useless divisor loop
  clk: mb86s7x: Drop non-building driver
  clk: ti: check for null return in strrchr to avoid null dereferencing
  clk: Don't write error code into divider register
  clk: uniphier: add video input subsystem clock
  clk: uniphier: add audio system clock
  clk: stm32h7: Add stm32h743 clock driver
  clk: gate: expose clk_gate_ops::is_enabled
  clk: nxp: clk-lpc32xx: rename clk_gate_is_enabled()
  clk: uniphier: add PXs3 clock data
  clk: hi6220: change watchdog clock source
  clk: Kconfig: Name RK805 in Kconfig for COMMON_CLK_RK808
  clk: cs2000: Add cs2000_set_saved_rate
  ...

Pull RTC updates from Alexandre Belloni:
 "Subsystem:
   - remove .open() and .release() RTC ops
   - constify i2c_device_id

  New driver:
   - Realtek RTD1295
   - Android emulator (goldfish) RTC

  Drivers:
   - ds1307: Beginning of a huge cleanup
   - s35390a: handle invalid RTC time
   - sun6i: external oscillator gate support"

* tag 'rtc-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (40 commits)
  rtc: ds1307: use octal permissions
  rtc: ds1307: fix braces
  rtc: ds1307: fix alignments and blank lines
  rtc: ds1307: use BIT
  rtc: ds1307: use u32
  rtc: ds1307: use sizeof
  rtc: ds1307: remove regs member
  rtc: Add Realtek RTD1295
  dt-bindings: rtc: Add Realtek RTD1295
  rtc: sun6i: Add support for the external oscillator gate
  rtc: goldfish: Add RTC driver for Android emulator
  dt-bindings: Add device tree binding for Goldfish RTC driver
  rtc: ds1307: add basic support for ds1341 chip
  rtc: ds1307: remove member nvram_offset from struct ds1307
  rtc: ds1307: factor out offset to struct chip_desc
  rtc: ds1307: factor out rtc_ops to struct chip_desc
  rtc: ds1307: factor out irq_handler to struct chip_desc
  rtc: ds1307: improve irq setup
  rtc: ds1307: constify struct chip_desc variables
  rtc: ds1307: improve trickle charger initialization
  ...

Pull sound fixes from Takashi Iwai:
 "Most of the commits are trivial cleanup patches, while one commit is a
  significant fix for the race at ALSA sequencer that was spotted by
  syzkaller"

* tag 'sound-fix-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: seq: Cancel pending autoload work at unbinding device
  ALSA: firewire: Use common error handling code in snd_motu_stream_start_duplex()
  ALSA: asihpi: Kill BUG_ON() usages
  ALSA: core: Use %pS printk format for direct addresses
  ALSA: ymfpci: Use common error handling code in snd_ymfpci_create()
  ALSA: ymfpci: Use common error handling code in snd_card_ymfpci_probe()
  ALSA: 6fire: Use common error handling code in usb6fire_chip_probe()
  ALSA: usx2y: Use common error handling code in submit_urbs()
  ALSA: us122l: Use common error handling code in us122l_create_card()
  ALSA: hdspm: Use common error handling code in snd_hdspm_probe()
  ALSA: rme9652: Use common code in hdsp_get_iobox_version()
  ALSA: maestro3: Use common error handling code in two functions

Pull SCSI fixes from James Bottomley:
 "A tiny update: one patch corrects a Kconfig problem with the shift of
  the SAS SMP code to BSG and the other removes a vestige of user space
  target mode"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: scsi_transport_sas: select BLK_DEV_BSGLIB
  scsi: Remove Scsi_Host.uspace_req_q

Pull block fixes from Jens Axboe:
 "Small collection of fixes that would be nice to have in -rc1. This
  contains:

   - NVMe pull request form Christoph, mostly with fixes for nvme-pci,
     host memory buffer in particular.

   - Error handling fixup for cgwb_create(), in case allocation of 'wb'
     fails. From Christophe Jaillet.

   - Ensure that trace_block_getrq() gets the 'dev' in an appropriate
     fashion, to avoid a potential NULL deref. From Greg Thelen.

   - Regression fix for dm-mq with blk-mq, fixing a problem with
     stacking IO schedulers. From me.

   - string.h fixup, fixing an issue with memcpy_and_pad(). This
     original change came in through an NVMe dependency, which is why
     I'm including it here. From Martin Wilck.

   - Fix potential int overflow in __blkdev_sectors_to_bio_pages(), from
     Mikulas.

   - MBR enable fix for sed-opal, from Scott"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: directly insert blk-mq request from blk_insert_cloned_request()
  mm/backing-dev.c: fix an error handling path in 'cgwb_create()'
  string.h: un-fortify memcpy_and_pad
  nvme-pci: implement the HMB entry number and size limitations
  nvme-pci: propagate (some) errors from host memory buffer setup
  nvme-pci: use appropriate initial chunk size for HMB allocation
  nvme-pci: fix host memory buffer allocation fallback
  nvme: fix lightnvm check
  block: fix integer overflow in __blkdev_sectors_to_bio_pages()
  block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled
  block: tolerate tracing of NULL bio

Pull documentation fixes from Jonathan Corbet:
 "A cleanup from Mauro that needed to wait for the media pull, plus a
  handful of other fixes that wandered in"

* tag 'docs-4.14' of git://git.lwn.net/linux:
  kokr/memory-barriers.txt: Apply atomic_t.txt change
  kokr/doc: Update memory-barriers.txt for read-to-write dependencies
  docs-rst: don't require adjustbox anymore
  docs-rst: conf.py: only setup notice box colors if Sphinx < 1.6
  docs-rst: conf.py: remove lscape from LaTeX preamble

Pull fuse updates from Miklos Szeredi:
 "This fixes a regression (spotted by the Sandstorm.io folks) in the pid
  namespace handling introduced in 4.12.

  There's also a fix for honoring sync/dsync flags for pwritev2()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: getattr cleanup
  fuse: honor iocb sync flags on write
  fuse: allow server to run in different pid_ns

Pull overlayfs updates from Miklos Szeredi:
 "This fixes d_ino correctness in readdir, which brings overlayfs on par
  with normal filesystems regarding inode number semantics, as long as
  all layers are on the same filesystem.

  There are also some bug fixes, one in particular (random ioctl's
  shouldn't be able to modify lower layers) that touches some vfs code,
  but of course no-op for non-overlay fs"

* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: fix false positive ESTALE on lookup
  ovl: don't allow writing ioctl on lower layer
  ovl: fix relatime for directories
  vfs: add flags to d_real()
  ovl: cleanup d_real for negative
  ovl: constant d_ino for non-merge dirs
  ovl: constant d_ino across copy up
  ovl: fix readdir error value
  ovl: check snprintf return

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've mostly tuned f2fs to provide better user
  experience for Android. Especially, we've worked on atomic write
  feature again with SQLite community in order to support it officially.
  And we added or modified several facilities to analyze and enhance IO
  behaviors.

  Major changes include:
   - add app/fs io stat
   - add inode checksum feature
   - support project/journalled quota
   - enhance atomic write with new ioctl() which exposes feature set
   - enhance background gc/discard/fstrim flows with new gc_urgent mode
   - add F2FS_IOC_FS{GET,SET}XATTR
   - fix some quota flows"

* tag 'f2fs-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (63 commits)
  f2fs: hurry up to issue discard after io interruption
  f2fs: fix to show correct discard_granularity in sysfs
  f2fs: detect dirty inode in evict_inode
  f2fs: clear radix tree dirty tag of pages whose dirty flag is cleared
  f2fs: speed up gc_urgent mode with SSR
  f2fs: better to wait for fstrim completion
  f2fs: avoid race in between read xattr & write xattr
  f2fs: make get_lock_data_page to handle encrypted inode
  f2fs: use generic terms used for encrypted block management
  f2fs: introduce f2fs_encrypted_file for clean-up
  Revert "f2fs: add a new function get_ssr_cost"
  f2fs: constify super_operations
  f2fs: fix to wake up all sleeping flusher
  f2fs: avoid race in between atomic_read & atomic_inc
  f2fs: remove unneeded parameter of change_curseg
  f2fs: update i_flags correctly
  f2fs: don't check inode's checksum if it was dirtied or writebacked
  f2fs: don't need to update inode checksum for recovery
  f2fs: trigger fdatasync for non-atomic_write file
  f2fs: fix to avoid race in between aio and gc
  ...

Pull ceph updates from Ilya Dryomov:
 "The highlights include:

   - a large series of fixes and improvements to the snapshot-handling
     code (Zheng Yan)

   - individual read/write OSD requests passed down to libceph are now
     limited to 16M in size to avoid hitting OSD-side limits (Zheng Yan)

   - encode MStatfs v2 message to allow for more accurate space usage
     reporting (Douglas Fuller)

   - switch to the new writeback error tracking infrastructure (Jeff
     Layton)"

* tag 'ceph-for-4.14-rc1' of git://github.com/ceph/ceph-client: (35 commits)
  ceph: stop on-going cached readdir if mds revokes FILE_SHARED cap
  ceph: wait on writeback after writing snapshot data
  ceph: fix capsnap dirty pages accounting
  ceph: ignore wbc->range_{start,end} when write back snapshot data
  ceph: fix "range cyclic" mode writepages
  ceph: cleanup local variables in ceph_writepages_start()
  ceph: optimize pagevec iterating in ceph_writepages_start()
  ceph: make writepage_nounlock() invalidate page that beyonds EOF
  ceph: properly get capsnap's size in get_oldest_context()
  ceph: remove stale check in ceph_invalidatepage()
  ceph: queue cap snap only when snap realm's context changes
  ceph: handle race between vmtruncate and queuing cap snap
  ceph: fix message order check in handle_cap_export()
  ceph: fix NULL pointer dereference in ceph_flush_snaps()
  ceph: adjust 36 checks for NULL pointers
  ceph: delete an unnecessary return statement in update_dentry_lease()
  ceph: ENOMEM pr_err in __get_or_create_frag() is redundant
  ceph: check negative offsets in ceph_llseek()
  ceph: more accurate statfs
  ceph: properly set snap follows for cap reconnect
  ...

If using a kernel with CONFIG_XFS_RT=y and we set the RHINHERIT flag on
a directory in a filesystem that does not have a realtime device and
create a new file in that directory, it gets marked as a real time file.
When data is written and a fsync is issued, the filesystem attempts to
flush a non-existent rt device during the fsync process.

This results in a crash dereferencing a null buftarg pointer in
xfs_blkdev_issue_flush():

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  IP: xfs_blkdev_issue_flush+0xd/0x20
  .....
  Call Trace:
    xfs_file_fsync+0x188/0x1c0
    vfs_fsync_range+0x3b/0xa0
    do_fsync+0x3d/0x70
    SyS_fsync+0x10/0x20
    do_syscall_64+0x4d/0xb0
    entry_SYSCALL64_slow_path+0x25/0x25

Setting RT inode flags does not require special privileges so any
unprivileged user can cause this oops to occur.  To reproduce, confirm
kernel is compiled with CONFIG_XFS_RT=y and run:

  # mkfs.xfs -f /dev/pmem0
  # mount /dev/pmem0 /mnt/test
  # mkdir /mnt/test/foo
  # xfs_io -c 'chattr +t' /mnt/test/foo
  # xfs_io -f -c 'pwrite 0 5m' -c fsync /mnt/test/foo/bar

Or just run xfstests with MKFS_OPTIONS="-d rtinherit=1" and wait.

Kernels built with CONFIG_XFS_RT=n are not exposed to this bug.

Fixes: f538d4da ("[XFS] write barrier support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Richard Wareing <rwareing@fb.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull dma-mapping updates from Christoph Hellwig:

 - removal of the old dma_alloc_noncoherent interface

 - remove unused flags to dma_declare_coherent_memory

 - restrict OF DMA configuration to specific physical busses

 - use the iommu mailing list for dma-mapping questions and patches

* tag 'dma-mapping-4.14' of git://git.infradead.org/users/hch/dma-mapping:
  dma-coherent: fix dma_declare_coherent_memory() logic error
  ARM: imx: mx31moboard: Remove unused 'dma' variable
  dma-coherent: remove an unused variable
  MAINTAINERS: use the iommu list for the dma-mapping subsystem
  dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
  dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag
  of: restrict DMA configuration
  dma-mapping: remove dma_alloc_noncoherent and dma_free_noncoherent
  i825xx: switch to switch to dma_alloc_attrs
  au1000_eth: switch to dma_alloc_attrs
  sgiseeq: switch to dma_alloc_attrs
  dma-mapping: reduce dma_mapping_error inline bloat

Pull uuid updates from Christoph Hellwig:
 "Just a single conversion to the new UUID API for this merge window"

* tag 'uuid-for-4.14' of git://git.infradead.org/users/hch/uuid:
  efi: switch to use new generic UUID API

Pull selinux updates from Paul Moore:
 "A relatively quiet period for SELinux, 11 patches with only two/three
  having any substantive changes.

  These noteworthy changes include another tweak to the NNP/nosuid
  handling, per-file labeling for cgroups, and an object class fix for
  AF_UNIX/SOCK_RAW sockets; the rest of the changes are minor tweaks or
  administrative updates (Stephen's email update explains the file
  explosion in the diffstat).

  Everything passes the selinux-testsuite"

[ Also a couple of small patches from the security tree from Tetsuo
  Handa for Tomoyo and LSM cleanup. The separation of security policy
  updates wasn't all that clean - Linus ]

* tag 'selinux-pr-20170831' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: constify nf_hook_ops
  selinux: allow per-file labeling for cgroupfs
  lsm_audit: update my email address
  selinux: update my email address
  MAINTAINERS: update the NetLabel and Labeled Networking information
  selinux: use GFP_NOWAIT in the AVC kmem_caches
  selinux: Generalize support for NNP/nosuid SELinux domain transitions
  selinux: genheaders should fail if too many permissions are defined
  selinux: update the selinux info in MAINTAINERS
  credits: update Paul Moore's info
  selinux: Assign proper class to PF_UNIX/SOCK_RAW sockets
  tomoyo: Update URLs in Documentation/admin-guide/LSM/tomoyo.rst
  LSM: Remove security_task_create() hook.

Pull x86 fixes from Ingo Molnar:
 "Two fixes: dead code removal, plus a SME memory encryption fix on
  32-bit kernels that crashed Xen guests"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Remove unused and undefined __generic_processor_info() declaration
  x86/mm: Make the SME mask a u64

Pull scheduler fixes from Ingo Molnar:
 "Three fixes:

   - fix a suspend/resume cpusets bug

   - fix a !CONFIG_NUMA_BALANCING bug

   - fix a kerneldoc warning"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix nuisance kernel-doc warning
  sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
  sched/fair: Fix wake_affine_llc() balancing rules

Pull perf tooling updates from Ingo Molnar:
 "Perf tooling updates and fixes"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf annotate browser: Help for cycling thru hottest instructions with TAB/shift+TAB
  perf stat: Only auto-merge events that are PMU aliases
  perf test: Add test case for PERF_SAMPLE_PHYS_ADDR
  perf script: Support physical address
  perf mem: Support physical address
  perf sort: Add sort option for physical address
  perf tools: Support new sample type for physical address
  perf vendor events powerpc: Remove duplicate events
  perf intel-pt: Fix syntax in documentation of config option
  perf test powerpc: Fix 'Object code reading' test
  perf trace: Support syscall name globbing
  perf syscalltbl: Support glob matching on syscall names
  perf report: Calculate the average cycles of iterations