The zero iterator can work in folio-sized chunks instead of page-sized
chunks.  This will save a lot of page cache lookups if the file is cached
in large folios.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

In the future, we want write_begin to know the entire length of the
write so that it can choose to allocate large folios.  Pass the full
length in from __iomap_zero_iter() and limit it where necessary.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

If we write to any page in a folio, we have to mark the entire
folio as dirty, and potentially COW the entire folio, because it'll
all get written back as one unit.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Handle folios of arbitrary size instead of working in PAGE_SIZE units.
readahead_folio() decreases the page refcount for you, so this is not
quite a mechanical change.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

We still only support up to a single page of inline data (at least,
per call to iomap_read_inline_data()), but it can now be written into
the middle of a folio in case we decide to allocate a 16KiB page for
a file that's 8.1KiB in size.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Pass a folio around instead of the page, and make sure the offset
is relative to the start of the folio instead of the start of a page.
Also use size_t for offset & length to make it clear that these are byte
counts, and to support >2GB folios in the future.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Use bio_for_each_folio() to iterate over each folio in the bio
instead of iterating over each page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

All but one caller already has the iomap_page, so we can avoid getting
it again.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Keep iomap_invalidatepage around as a wrapper for use in address_space
operations.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

This is an address_space operation, so its argument must remain as a
struct page, but we can use a folio internally.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

iomap_page_release() was also assuming that it was being passed a
head page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

This function already assumed it was being passed a head page, so
just formalise that.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

The big comment about only using a head page can go away now that
it takes a folio argument.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

There are no plans to convert buffer_head infrastructure to use large
folios, but __block_write_begin_int() is called from iomap, and it's
more convenient and less error-prone if we pass in a folio from iomap.
It also has a nice saving of almost 200 bytes of code from removing
repeated calls to compound_head().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

Allow callers to iterate over each folio instead of each page.  The
bio need not have been constructed using folios originally.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

This is a thin wrapper around bio_add_page().  The main advantage here
is the documentation that folios larger than 2GiB are not supported.
It's not currently possible to allocate folios that large, but if it
ever becomes possible, this function will fail gracefully instead of
doing I/O to the wrong bytes.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 5.16-rc5.  They include:

   - gadget driver fixes for reported issues

   - xhci fixes for reported problems.

   - config endpoint parsing fixes for where we got bitfields wrong

  Most of these have been in linux-next, the remaining few were not, but
  got lots of local testing in my systems and in some cloud testing
  infrastructures"

* tag 'usb-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: core: config: using bit mask instead of individual bits
  usb: core: config: fix validation of wMaxPacketValue entries
  USB: gadget: zero allocate endpoint 0 buffers
  USB: gadget: detect too-big endpoint 0 requests
  xhci: avoid race between disable slot command and host runtime suspend
  xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending
  Revert "usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default"

Pull char/misc driver fixes from Greg KH:
 "Here are a bunch of small char/misc and other driver subsystem fixes.

  Included in here are:

   - iio driver fixes for reported problems

   - phy driver fixes for a number of reported problems

   - mhi resume bugfix for broken hardware

   - nvmem driver fix

   - rtsx driver fix for irq issues

   - fastrpc packet parsing fix

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (33 commits)
  bus: mhi: core: Add support for forced PM resume
  iio: trigger: stm32-timer: fix MODULE_ALIAS
  misc: rtsx: Avoid mangling IRQ during runtime PM
  nvmem: eeprom: at25: fix FRAM byte_len
  misc: fastrpc: fix improper packet size calculation
  MAINTAINERS: add maintainer for Qualcomm FastRPC driver
  bus: mhi: pci_generic: Fix device recovery failed issue
  iio: adc: stm32: fix null pointer on defer_probe error
  phy: HiSilicon: Fix copy and paste bug in error handling
  dt-bindings: phy: zynqmp-psgtr: fix USB phy name
  phy: ti: omap-usb2: Fix the kernel-doc style
  phy: qualcomm: ipq806x-usb: Fix kernel-doc style
  iio: at91-sama5d2: Fix incorrect sign extension
  iio: adc: axp20x_adc: fix charging current reporting on AXP22x
  iio: gyro: adxrs290: fix data signedness
  phy: ti: tusb1210: Fix the kernel-doc warn
  phy: qualcomm: usb-hsic: Fix the kernel-doc warn
  phy: qualcomm: qmp: Add missing struct documentation
  phy: mvebu-cp110-utmi: Fix kernel-doc warns
  iio: ad7768-1: Call iio_trigger_notify_done() on error
  ...

Pull timer fixes from Thomas Gleixner:
 "Two fixes for clock chip drivers:

   - A regression fix for the Designware APB timer. A recent change to
     the error checking code transformed the error condition wrongly so
     it turned into a fail if good condition.

   - Fix a clang build fail of the ARM architected timer driver"

* tag 'timers-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/arm_arch_timer: Force inlining of erratum_set_next_event_generic()
  clocksource/drivers/dw_apb_timer_of: Fix probe failure

Pull irq fixes from Thomas Gleixner:
 "A set of interrupt chip driver fixes:

   - Fix the multi vector MSI allocation on Armada 370XP

   - Do interrupt acknowledgement correctly in the aspeed-scu driver

   - Make the IPR register offset correct in the NVIC driver

   - Make redistribution table flushing correct by issueing a SYNC
     command to ensure that the invalidation command has been executed

   - Plug a device tree node reference leak in the bcm7210-l2 driver

   - Trivial fixes in the MIPS GIC and the Apple AIC drivers"

* tag 'irq-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/irq-bcm7120-l2: Add put_device() after of_find_device_by_node()
  irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL
  irqchip/apple-aic: Mark aic_init_smp() as __init
  irqchip: nvic: Fix offset for Interrupt Priority Offsets
  irqchip/mips-gic: Use bitfield helpers
  irqchip/aspeed-scu: Replace update_bits with write_bits.
  irqchip/armada-370-xp: Fix support for Multi-MSI interrupts
  irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc()

Pull scheduler fix from Thomas Gleixner:
 "A single fix for the x86 scheduler topology:

  Using cluster topology on hybrid CPUs, e.g. Alder Lake, biases the
  scheduler towards the ATOM cluster as that has more total capacity.
  Use selection based on CPU priority instead"

* tag 'sched-urgent-2021-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched,x86: Don't use cluster topology for x86 hybrid CPUs

Pull csky from Guo Ren:
 "Only one fix for csky: fix fpu config macro"

* tag 'csky-for-linus-5.16-rc5' of git://github.com/c-sky/csky-linux:
  csky: fix typo of fpu config macro

Using standard USB_EP_MAXP_MULT_MASK instead of individual bits for
extracting multiple-transactions bits from wMaxPacketSize value.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-2-pavel.hofman@ivitera.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The checks performed by commit aed9d65a ("USB: validate
wMaxPacketValue entries in endpoint descriptors") require that initial
value of the maxp variable contains both maximum packet size bits
(10..0) and multiple-transactions bits (12..11). However, the existing
code assings only the maximum packet size bits. This patch assigns all
bits of wMaxPacketSize to the variable.

Fixes: aed9d65a ("USB: validate wMaxPacketValue entries in endpoint descriptors")
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@ivitera.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Under some conditions, USB gadget devices can show allocated buffer
contents to a host.  Fix this up by zero-allocating them so that any
extra data will all just be zeros.
Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Sometimes USB hosts can ask for buffers that are too large from endpoint
0, which should not be allowed.  If this happens for OUT requests, stall
the endpoint, but for IN requests, trim the request size to the endpoint
buffer size.
Co-developed-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull SCSI fixes from James Bottomley:
 "Four fixes, all in drivers.

  Three are small and obvious, the qedi one is a bit larger but also
  pretty obvious"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: qla2xxx: Format log strings only if needed
  scsi: scsi_debug: Fix buffer size of REPORT ZONES command
  scsi: qedi: Fix cmd_cleanup_cmpl counter mismatch issue
  scsi: pm80xx: Do not call scsi_remove_host() in pm8001_alloc()

Pull xfs fix from Darrick Wong:
 "This fixes a race between a readonly remount process and other
  processes that hold a file IOLOCK on files that previously experienced
  copy on write, that could result in severe filesystem corruption if
  the filesystem is then remounted rw.

  I think this is fairly rare (since the only reliable reproducer I have
  that fits the second criteria is the experimental xfs_scrub program),
  but the race is clear, so we still need to fix this.

  Summary:

   - Fix a data corruption vector that can result from the ro remount
     process failing to clear all speculative preallocations from files
     and the rw remount process not noticing the incomplete cleanup"

* tag 'xfs-5.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: remove all COW fork extents when remounting readonly

Pull percpu fixes from Dennis Zhou:
 "This contains a fix for SMP && !MMU archs for percpu which has been
  tested by arm and sh. It seems in the past they have gotten away with
  it due to mapping of vm functions to km functions, but this fell apart
  a few releases ago and was just reported recently.

  The other is just a minor dependency clean up.

  I think queued up right now by Andrew is a fix in percpu that papers
  of what seems to be a bug in hotplug for a special situation with
  memoryless nodes. Michal Hocko is digging into it further"

* 'for-5.16-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu_ref: Replace kernel.h with the necessary inclusions
  percpu: km: ensure it is used with NOMMU (either UP or SMP)

Merge tag 'perf-tools-fixes-for-v5.16-2021-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Prevent out-of-bounds access to per sample registers.

 - Fix NULL vs IS_ERR_OR_NULL() checking on the python binding.

 - Intel PT fixes, half of those are one-liners:
      - Fix some PGE (packet generation enable/control flow packets) usage.
      - Fix sync state when a PSB (synchronization) packet is found.
      - Fix intel_pt_fup_event() assumptions about setting state type.
      - Fix state setting when receiving overflow (OVF) packet.
      - Fix next 'err' value, walking trace.
      - Fix missing 'instruction' events with 'q' option.
      - Fix error timestamp setting on the decoder error path.

* tag 'perf-tools-fixes-for-v5.16-2021-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf python: Fix NULL vs IS_ERR_OR_NULL() checking
  perf intel-pt: Fix error timestamp setting on the decoder error path
  perf intel-pt: Fix missing 'instruction' events with 'q' option
  perf intel-pt: Fix next 'err' value, walking trace
  perf intel-pt: Fix state setting when receiving overflow (OVF) packet
  perf intel-pt: Fix intel_pt_fup_event() assumptions about setting state type
  perf intel-pt: Fix sync state when a PSB (synchronization) packet is found
  perf intel-pt: Fix some PGE (packet generation enable/control flow packets) usage
  perf tools: Prevent out-of-bounds access to registers

Pull block fixes from Jens Axboe:
 "A few block fixes that should go into this release:

   - NVMe pull request:
        - set ana_log_size to 0 after freeing ana_log_buf (Hou Tao)
        - show subsys nqn for duplicate cntlids (Keith Busch)
        - disable namespace access for unsupported metadata (Keith
          Busch)
        - report write pointer for a full zone as zone start + zone len
          (Niklas Cassel)
        - fix use after free when disconnecting a reconnecting ctrl
          (Ruozhu Li)
        - fix a list corruption in nvmet-tcp (Sagi Grimberg)

   - Fix for a regression on DIO single bio async IO (Pavel)

   - ioprio seteuid fix (Davidlohr)

   - mtd fix that subsequently got reverted as it was broken, will get
     re-done and submitted for the next round

   - Two MD fixes via Song (Markus, zhangyue)"

* tag 'block-5.16-2021-12-10' of git://git.kernel.dk/linux-block:
  Revert "mtd_blkdevs: don't scan partitions for plain mtdblock"
  block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)
  md: fix double free of mddev->private in autorun_array()
  md: fix update super 1.0 on rdev size change
  nvmet-tcp: fix possible list corruption for unexpected command failure
  block: fix single bio async DIO error handling
  nvme: fix use after free when disconnecting a reconnecting ctrl
  nvme-multipath: set ana_log_size to 0 after free ana_log_buf
  mtd_blkdevs: don't scan partitions for plain mtdblock
  nvme: report write pointer for a full zone as zone start + zone len
  nvme: disable namespace access for unsupported metadata
  nvme: show subsys nqn for duplicate cntlids

Pull io_uring fixes from Jens Axboe:
 "A few fixes that are all bound for stable:

   - Two syzbot reports for io-wq that turned out to be separate fixes,
     but ultimately very closely related

   - io_uring task_work running on cancelations"

* tag 'io_uring-5.16-2021-12-10' of git://git.kernel.dk/linux-block:
  io-wq: check for wq exit after adding new worker task_work
  io_uring: ensure task_work gets run as part of cancelations
  io-wq: remove spurious bit clear on task_work addition

Pull i2c fixes from Wolfram Sang:
 "Two more I2C driver bugfixes"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mpc: Use atomic read and fix break condition
  i2c: virtio: fix completion handling

Pull clk driver fixes from Stephen Boyd:

 - Fix qcom mux logic to look at the proper parent table member. Luckily
   this clk type isn't very common.

 - Don't kill clks on qcom systems that use Trion PLLs that are enabled
   out of the bootloader. We will simply skip programming the PLL rate
   if it's already done.

 - Use the proper clk_ops for the qcom sm6125 ICE clks.

 - Use module_platform_driver() in i.MX as it can be a module.

 - Fix a UAF in the versatile clk driver on an error path.

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: versatile: clk-icst: use after free on error path
  clk: qcom: sm6125-gcc: Swap ops of ice and apps on sdcc1
  clk: imx: use module_platform_driver
  clk: qcom: clk-alpha-pll: Don't reconfigure running Trion
  clk: qcom: regmap-mux: fix parent clock lookup

Pull devicetree fixes from Rob Herring:

 - Revert schema checks on %.dtb targets. This was problematic for some
   external build tools.

 - A few DT binding example fixes

 - Add back dropped 'enet-phy-lane-no-swap' Ethernet PHY property

 - Drop erroneous if/then schema in nxp,imx7-mipi-csi2

 - Add a quirk to fix some interrupt controllers use of 'interrupt-map'

* tag 'devicetree-fixes-for-5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  Revert "kbuild: Enable DT schema checks for %.dtb targets"
  dt-bindings: bq25980: Fixup the example
  dt-bindings: input: gpio-keys: Fix interrupts in example
  dt-bindings: net: Reintroduce PHY no lane swap binding
  dt-bindings: media: nxp,imx7-mipi-csi2: Drop bad if/then schema
  of/irq: Add a quirk for controllers with their own definition of interrupt-map
  dt-bindings: iio: adc: exynos-adc: Fix node name in example

Merge misc fixes from Andrew Morton:
 "21 patches.

  Subsystems affected by this patch series: MAINTAINERS, mailmap, and mm
  (mlock, pagecache, damon, slub, memcg, hugetlb, and pagecache)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
  mm: bdi: initialize bdi_min_ratio when bdi is unregistered
  hugetlbfs: fix issue of preallocation of gigantic pages can't work
  mm/memcg: relocate mod_objcg_mlstate(), get_obj_stock() and put_obj_stock()
  mm/slub: fix endianness bug for alloc/free_traces attributes
  selftests/damon: split test cases
  selftests/damon: test debugfs file reads/writes with huge count
  selftests/damon: test wrong DAMOS condition ranges input
  selftests/damon: test DAMON enabling with empty target_ids case
  selftests/damon: skip test if DAMON is running
  mm/damon/vaddr-test: remove unnecessary variables
  mm/damon/vaddr-test: split a test function having >1024 bytes frame size
  mm/damon/vaddr: remove an unnecessary warning message
  mm/damon/core: remove unnecessary error messages
  mm/damon/dbgfs: remove an unnecessary error message
  mm/damon/core: use better timer mechanisms selection threshold
  mm/damon/core: fix fake load reports due to uninterruptible sleeps
  timers: implement usleep_idle_range()
  filemap: remove PageHWPoison check from next_uptodate_page()
  mailmap: update email address for Guo Ren
  MAINTAINERS: update kdump maintainers
  ...

Merge tag 'timers-v5.16-rc4' of https://git.linaro.org/people/daniel.lezcano/linux into timers/urgent

Pull timer fixes from Daniel Lezcano:

  - Fix build error with clang and some kernel configuration on the
    arm64 architected timer by inlining the
    erratum_set_next_event_generic() function (Marc Zyngier)

  - Fix probe error on the dw_apb_timer_of driver by fixing the
    incorrect condition previously introduced (Alexey Sheplyakov)

Link: https://lore.kernel.org/r/429b796d-9395-4ca8-81f3-30911f80a9a9@linaro.org

The function trace_event__tp_format_id may return ERR_PTR(-ENOMEM).  Use
IS_ERR_OR_NULL to check tp_format.
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Link: http://lore.kernel.org/lkml/20211211053856.19827-1-linmq006@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

An error timestamp shows the last known timestamp for the queue, but this
is not updated on the error path. Fix by setting it.

Fixes: f4aa0819 ("perf tools: Add Intel PT decoder")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org # v5.15+
Link: https://lore.kernel.org/r/20211210162303.2288710-8-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>