The $id path checks were inadequately checking the path part of the $id
value. With the check fixed, there's a number of errors that need to be
fixed. Most of the errors are including 'bindings/' in the path which
should not be as that is considered the root.

Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: "Nuno Sá" <nuno.sa@analog.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Stefan Popa <stefan.popa@analog.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Marcus Folkesson <marcus.folkesson@gmail.com>
Cc: Kent Gustavsson <kent@minoris.se>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-iio@vger.kernel.org
Cc: linux-input@vger.kernel.org
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Remove <dt-bindings/clock/intel,lgm-clk.h> dependency as
it is not present in the mainline tree. Use numeric value
instead of LGM_GCLK_PCIE10 macro.
Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
[robh: Also drop interrupt-parent from example]
Signed-off-by: Rob Herring <robh@kernel.org>

DT labels can't have '-' in them causing a compile failure in the example.
Fixing that leads to more warnings:

Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:23.13-33: Warning (reg_format): /example-0/chiptop@e0200000/emmc-phy@a8:reg: property has invalid length (8 bytes) (#address-cells == 2, #size-cells == 1)
Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dt.yaml: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:21.33-26.13: Warning (avoid_default_addr_size): /example-0/chiptop@e0200000/emmc-phy@a8: Relying on default #address-cells value
Documentation/devicetree/bindings/phy/intel,lgm-emmc-phy.example.dts:21.33-26.13: Warning (avoid_default_addr_size): /example-0/chiptop@e0200000/emmc-phy@a8: Relying on default #size-cells value

Fixes: 5bc99910 ("dt-bindings: phy: intel-emmc-phy: Add YAML schema for LGM eMMC PHY")
Cc: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Cc: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Pull networking fixes from David Miller:

 1) Use after free in rxrpc_put_local(), from David Howells.

 2) Fix 64-bit division error in mlxsw, from Nathan Chancellor.

 3) Make sure we clear various bits of TCP state in response to
    tcp_disconnect(). From Eric Dumazet.

 4) Fix netlink attribute policy in cls_rsvp, from Eric Dumazet.

 5) txtimer must be deleted in stmmac suspend(), from Nicolin Chen.

 6) Fix TC queue mapping in bnxt_en driver, from Michael Chan.

 7) Various netdevsim fixes from Taehee Yoo (use of uninitialized data,
    snapshot panics, stack out of bounds, etc.)

 8) cls_tcindex changes hash table size after allocating the table, fix
    from Cong Wang.

 9) Fix regression in the enforcement of session ID uniqueness in l2tp.
    We only have to enforce uniqueness for IP based tunnels not UDP
    ones. From Ridge Kennedy.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (46 commits)
  gtp: use __GFP_NOWARN to avoid memalloc warning
  l2tp: Allow duplicate session creation with UDP
  r8152: Add MAC passthrough support to new device
  net_sched: fix an OOB access in cls_tcindex
  qed: Remove set but not used variable 'p_link'
  tc-testing: add missing 'nsPlugin' to basic.json
  tc-testing: fix eBPF tests failure on linux fresh clones
  net: hsr: fix possible NULL deref in hsr_handle_frame()
  netdevsim: remove unused sdev code
  netdevsim: use __GFP_NOWARN to avoid memalloc warning
  netdevsim: use IS_ERR instead of IS_ERR_OR_NULL for debugfs
  netdevsim: fix stack-out-of-bounds in nsim_dev_debugfs_init()
  netdevsim: fix panic in nsim_dev_take_snapshot_write()
  netdevsim: disable devlink reload when resources are being used
  netdevsim: fix using uninitialized resources
  bnxt_en: Fix TC queue mapping.
  bnxt_en: Fix logic that disables Bus Master during firmware reset.
  bnxt_en: Fix RDMA driver failure with SRIOV after firmware reset.
  bnxt_en: Refactor logic to re-enable SRIOV after firmware reset detected.
  net: stmmac: Delete txtimer in suspend()
  ...

Pull ARM updates from Russell King:

 - decompressor updates

 - prevention of out-of-bounds access while stacktracing

 - fix a section mismatch warning with free_memmap()

 - make kexec depend on MMU to avoid some build errors

 - remove swapops stubs

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8954/1: NOMMU: remove stubs for swapops
  ARM: 8952/1: Disable kmemleak on XIP kernels
  ARM: 8951/1: Fix Kexec compilation issue.
  ARM: 8949/1: mm: mark free_memmap as __init
  ARM: 8948/1: Prevent OOB access in stacktrace
  ARM: 8945/1: decompressor: use CONFIG option instead of cc-option
  ARM: 8942/1: Revert "8857/1: efi: enable CP15 DMB instructions before cleaning the cache"
  ARM: 8941/1: decompressor: enable CP15 barrier instructions in v7 cache setup code

Pull powerpc updates from Michael Ellerman:
 "A pretty small batch for us, and apologies for it being a bit late, I
  wanted to sneak Christophe's user_access_begin() series in.

  Summary:

   - Implement user_access_begin() and friends for our platforms that
     support controlling kernel access to userspace.

   - Enable CONFIG_VMAP_STACK on 32-bit Book3S and 8xx.

   - Some tweaks to our pseries IOMMU code to allow SVMs ("secure"
     virtual machines) to use the IOMMU.

   - Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE to the 32-bit
     VDSO, and some other improvements.

   - A series to use the PCI hotplug framework to control opencapi
     card's so that they can be reset and re-read after flashing a new
     FPGA image.

  As well as other minor fixes and improvements as usual.

  Thanks to: Alastair D'Silva, Alexandre Ghiti, Alexey Kardashevskiy,
  Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Bai Yingjie, Chen
  Zhou, Christophe Leroy, Frederic Barrat, Greg Kurz, Jason A.
  Donenfeld, Joel Stanley, Jordan Niethe, Julia Lawall, Krzysztof
  Kozlowski, Laurent Dufour, Laurentiu Tudor, Linus Walleij, Michael
  Bringmann, Nathan Chancellor, Nicholas Piggin, Nick Desaulniers,
  Oliver O'Halloran, Peter Ujfalusi, Pingfan Liu, Ram Pai, Randy Dunlap,
  Russell Currey, Sam Bobroff, Sebastian Andrzej Siewior, Shawn
  Anastasio, Stephen Rothwell, Steve Best, Sukadev Bhattiprolu, Thiago
  Jung Bauermann, Tyrel Datwyler, Vaibhav Jain"

* tag 'powerpc-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (131 commits)
  powerpc: configs: Cleanup old Kconfig options
  powerpc/configs/skiroot: Enable some more hardening options
  powerpc/configs/skiroot: Disable xmon default & enable reboot on panic
  powerpc/configs/skiroot: Enable security features
  powerpc/configs/skiroot: Update for symbol movement only
  powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV
  powerpc/configs/skiroot: Drop HID_LOGITECH
  powerpc/configs: Drop NET_VENDOR_HP which moved to staging
  powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE
  powerpc/configs: Drop CONFIG_QLGE which moved to staging
  powerpc: Do not consider weak unresolved symbol relocations as bad
  powerpc/32s: Fix kasan_early_hash_table() for CONFIG_VMAP_STACK
  powerpc: indent to improve Kconfig readability
  powerpc: Provide initial documentation for PAPR hcalls
  powerpc: Implement user_access_save() and user_access_restore()
  powerpc: Implement user_access_begin and friends
  powerpc/32s: Prepare prevent_user_access() for user_access_end()
  powerpc/32s: Drop NULL addr verification
  powerpc/kuap: Fix set direction in allow/prevent_user_access()
  powerpc/32s: Fix bad_kuap_fault()
  ...

Pull Microblaze update from Michal Simek:

 - enable CMA

 - add support for MB v11

 - defconfig updates

 - minor fixes

* tag 'microblaze-v5.6-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: Add ID for Microblaze v11
  microblaze: Prevent the overflow of the start
  microblaze: Wire CMA allocator
  asm-generic: Make dma-contiguous.h a mandatory include/asm header
  microblaze: Sync defconfig with latest Kconfig layout
  microblaze: defconfig: Disable EXT2 driver and Enable EXT3 & EXT4 drivers
  microblaze: Align comments with register usage

Pull overlayfs update from Miklos Szeredi:

 - Try to preserve holes in sparse files when copying up, thus saving
   disk space and improving performance.

 - Fix a performance regression introduced in v4.19 by preserving
   asynchronicity of IO when fowarding to underlying layers. Add VFS
   helpers to submit async iocbs.

 - Fix a regression in lseek(2) introduced in v4.19 that breaks >2G
   seeks on 32bit kernels.

 - Fix a corner case where st_ino/st_dev was not preserved across copy
   up.

 - Miscellaneous fixes and cleanups.

* tag 'ovl-update-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: fix lseek overflow on 32bit
  ovl: add splice file read write helper
  ovl: implement async IO routines
  vfs: add vfs_iocb_iter_[read|write] helper functions
  ovl: layer is const
  ovl: fix corner case of non-constant st_dev;st_ino
  ovl: fix corner case of conflicting lower layer uuid
  ovl: generalize the lower_fs[] array
  ovl: simplify ovl_same_sb() helper
  ovl: generalize the lower_layers[] array
  ovl: improving copy-up efficiency for big sparse file
  ovl: use ovl_inode_lock in ovl_llseek()
  ovl: use pr_fmt auto generate prefix
  ovl: fix wrong WARN_ON() in ovl_cache_update_ino()

gtp hashtable size is received by user-space.
So, this hashtable size could be too large. If so, kmalloc will internally
print a warning message.
This warning message is actually not necessary for the gtp module.
So, this patch adds __GFP_NOWARN to avoid this message.

Splat looks like:
[ 2171.200049][ T1860] WARNING: CPU: 1 PID: 1860 at mm/page_alloc.c:4713 __alloc_pages_nodemask+0x2f3/0x740
[ 2171.238885][ T1860] Modules linked in: gtp veth openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv]
[ 2171.262680][ T1860] CPU: 1 PID: 1860 Comm: gtp-link Not tainted 5.5.0+ #321
[ 2171.263567][ T1860] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 2171.264681][ T1860] RIP: 0010:__alloc_pages_nodemask+0x2f3/0x740
[ 2171.265332][ T1860] Code: 64 fe ff ff 65 48 8b 04 25 c0 0f 02 00 48 05 f0 12 00 00 41 be 01 00 00 00 49 89 47 0
[ 2171.267301][ T1860] RSP: 0018:ffff8880b51af1f0 EFLAGS: 00010246
[ 2171.268320][ T1860] RAX: ffffed1016a35e43 RBX: 0000000000000000 RCX: 0000000000000000
[ 2171.269517][ T1860] RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000000
[ 2171.270305][ T1860] RBP: 0000000000040cc0 R08: ffffed1018893109 R09: dffffc0000000000
[ 2171.275973][ T1860] R10: 0000000000000001 R11: ffffed1018893108 R12: 1ffff11016a35e43
[ 2171.291039][ T1860] R13: 000000000000000b R14: 000000000000000b R15: 00000000000f4240
[ 2171.292328][ T1860] FS:  00007f53cbc83740(0000) GS:ffff8880da000000(0000) knlGS:0000000000000000
[ 2171.293409][ T1860] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2171.294586][ T1860] CR2: 000055f540014508 CR3: 00000000b49f2004 CR4: 00000000000606e0
[ 2171.295424][ T1860] Call Trace:
[ 2171.295756][ T1860]  ? mark_held_locks+0xa5/0xe0
[ 2171.296659][ T1860]  ? __alloc_pages_slowpath+0x21b0/0x21b0
[ 2171.298283][ T1860]  ? gtp_encap_enable_socket+0x13e/0x400 [gtp]
[ 2171.298962][ T1860]  ? alloc_pages_current+0xc1/0x1a0
[ 2171.299475][ T1860]  kmalloc_order+0x22/0x80
[ 2171.299936][ T1860]  kmalloc_order_trace+0x1d/0x140
[ 2171.300437][ T1860]  __kmalloc+0x302/0x3a0
[ 2171.300896][ T1860]  gtp_newlink+0x293/0xba0 [gtp]
[ ... ]

Fixes: 459aa660 ("gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the past it was possible to create multiple L2TPv3 sessions with the
same session id as long as the sessions belonged to different tunnels.
The resulting sessions had issues when used with IP encapsulated tunnels,
but worked fine with UDP encapsulated ones. Some applications began to
rely on this behaviour to avoid having to negotiate unique session ids.

Some time ago a change was made to require session ids to be unique across
all tunnels, breaking the applications making use of this "feature".

This change relaxes the duplicate session id check to allow duplicates
if both of the colliding sessions belong to UDP encapsulated tunnels.

Fixes: dbdbc73b ("l2tp: fix duplicate session creation")
Signed-off-by: Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz>
Acked-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Device 0xa387 also supports MAC passthrough, therefore add it to the
whitelst.

BugLink: https://bugs.launchpad.net/bugs/1827961/comments/30Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

As Eric noticed, tcindex_alloc_perfect_hash() uses cp->hash
to compute the size of memory allocation, but cp->hash is
set again after the allocation, this caused an out-of-bound
access.

So we have to move all cp->hash initialization and computation
before the memory allocation. Move cp->mask and cp->shift together
as cp->hash may need them for computation too.

Reported-and-tested-by: syzbot+35d4dea36c387813ed31@syzkaller.appspotmail.com
Fixes: 331b7292 ("net: sched: RCU cls_tcindex")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

List Microblaze v11 from PVR.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

In case the start + cache size is more than the max int the
start overflows.
Prevent the same.
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Based on commit 04e3543e ("microblaze: use the generic dma coherent
remap allocator")
CMA can be easily enabled by calling dma_contiguous_reserve() at the end of
mmu_init(). High limit is end of lowmem space which is completely unused at
this point of time.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

dma-continuguous.h is generic for all architectures except arm32 which has
its own version.

Similar change was done for msi.h by commit a1b39bae
("asm-generic: Make msi.h a mandatory include/asm header")
Suggested-by: Christoph Hellwig <hch@infradead.org>
Link: https://lore.kernel.org/linux-arm-kernel/20200117080446.GA8980@lst.de/T/#m92bb56b04161057635d4142e1b3b9b6b0a70122eSigned-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Paul Walmsley <paul.walmsley@sifive.com> # for arch/riscv

Layout was changed by commit 6210b640
("kernel-hacking: group sysrq/kgdb/ubsan into 'Generic Kernel Debugging Instruments'")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

As EXT4 filesystem driver is used for handling EXT2 file systems as
well. There is no need to enable EXT2 driver. This patch disables EXT2
and enables EXT3/EXT4 drivers.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Pull remoteproc updates from Bjorn Andersson:
 "This adds support for the Mediatek MT8183 SCP, modem remoteproc on
  Qualcomm SC7180 platform, audio and sensor remoteprocs on Qualcomm
  MSM8998 and audio, compute, modem and sensor remoteprocs on Qualcomm
  SM8150.

  It adds votes for necessary power-domains for all Qualcomm TrustZone
  based remoteproc instances are held, fixes a bug related to remoteproc
  drivers registering before the core has been initialized and does
  clean up the Qualcomm modem remoteproc driver"

* tag 'rproc-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc: (21 commits)
  remoteproc: qcom: q6v5-mss: Improve readability of reset_assert
  remoteproc: qcom: q6v5-mss: Use regmap_read_poll_timeout
  remoteproc: qcom: q6v5-mss: Rename boot status timeout
  remoteproc: qcom: q6v5-mss: Improve readability across clk handling
  remoteproc: use struct_size() helper
  remoteproc: Initialize rproc_class before use
  rpmsg: add rpmsg support for mt8183 SCP.
  remoteproc/mediatek: add SCP support for mt8183
  dt-bindings: Add a binding for Mediatek SCP
  remoteproc: mss: q6v5-mss: Add modem support on SC7180
  dt-bindings: remoteproc: qcom: Add Q6V5 Modem PIL binding for SC7180
  remoteproc: qcom: pas: Add MSM8998 ADSP and SLPI support
  dt-bindings: remoteproc: qcom: Add ADSP and SLPI support for MSM8998 SoC
  remoteproc: q6v5-mss: Remove mem clk from the active pool
  remoteproc: qcom: Remove unneeded semicolon
  remoteproc: qcom: pas: Add auto_boot flag
  remoteproc: qcom: pas: Add SM8150 ADSP, CDSP, Modem and SLPI support
  dt-bindings: remoteproc: qcom: SM8150 Add ADSP, CDSP, MPSS and SLPI support
  remoteproc: qcom: pas: Vote for active/proxy power domains
  dt-bindings: remoteproc: qcom: Add power-domain bindings for Q6V5 PAS
  ...

Pull hwspinlock updates from Bjorn Andersson:
 "This continues the transition of drivers to device managed resources
  and removal of unnecessary PM runtime integration, with cleanups to
  the SIRF, OMAP and Qualcomm hwspinlock drivers.

  It also adds Baolin as reviewer in MAINTAINERS"

* tag 'hwlock-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc:
  hwspinlock: sirf: Use devm_hwspin_lock_register() to register hwlock controller
  hwspinlock: sirf: Remove redundant PM runtime functions
  hwspinlock: sirf: Change to use devm_platform_ioremap_resource()
  hwspinlock: omap: Use devm_kzalloc() to allocate memory
  hwspinlock: omap: Change to use devm_platform_ioremap_resource()
  hwspinlock: qcom: Use devm_hwspin_lock_register() to register hwlock controller
  hwspinlock: qcom: Remove redundant PM runtime functions
  hwspinlock: stm32: convert to devm_platform_ioremap_resource
  MAINTAINERS: Add myself as reviewer for the hwspinlock subsystem

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/qlogic/qed/qed_cxt.c: In function 'qed_qm_init_pf':
drivers/net/ethernet/qlogic/qed/qed_cxt.c:1401:29: warning:
 variable 'p_link' set but not used [-Wunused-but-set-variable]

commit 92fae6fb ("qed: FW 8.42.2.0 Queue Manager changes")
leave behind this unused variable.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Davide Caratti says:

====================
unbreak 'basic' and 'bpf' tdc testcases

- patch 1/2 fixes tdc failures with 'bpf' action on fresch clones of the
  kernel tree
- patch 2/2 allow running tdc for the 'basic' classifier without tweaking
  tdc_config.py
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

since tdc tests for cls_basic need $DEV1, use 'nsPlugin' so that the
following command can be run without errors:

 [root@f31 tc-testing]# ./tdc.py -c basic

Fixes: 4717b053 ("tc-testing: Introduced tdc tests for basic filter")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

when the following command is done on a fresh clone of the kernel tree,

 [root@f31 tc-testing]# ./tdc.py -c bpf

test cases that need to build the eBPF sample program fail systematically,
because 'buildebpfPlugin' is unable to install the kernel headers (i.e, the
'khdr' target fails). Pass the correct environment to 'make', in place of
ENVIR, to allow running these tests.

Fixes: 4c2d39bd ("tc-testing: use a plugin to build eBPF program")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

hsr_port_get_rcu() can return NULL, so we need to be careful.

general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 10249 Comm: syz-executor.5 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:hsr_addr_is_self+0x86/0x330 net/hsr/hsr_framereg.c:44
Code: 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 6b ff 94 f9 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 75 02 00 00 48 8b 43 30 49 39 c6 49 89 47 c0 0f
RSP: 0018:ffffc90000da8a90 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87e0cc33
RDX: 0000000000000006 RSI: ffffffff87e035d5 RDI: 0000000000000000
RBP: ffffc90000da8b20 R08: ffff88808e7de040 R09: ffffed1015d2707c
R10: ffffed1015d2707b R11: ffff8880ae9383db R12: ffff8880a689bc5e
R13: 1ffff920001b5153 R14: 0000000000000030 R15: ffffc90000da8af8
FS:  00007fd7a42be700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32338000 CR3: 00000000a928c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hsr_handle_frame+0x1c5/0x630 net/hsr/hsr_slave.c:31
 __netif_receive_skb_core+0xfbc/0x30b0 net/core/dev.c:5099
 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:5196
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5312
 process_backlog+0x206/0x750 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x508/0x1120 net/core/dev.c:6650
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>

Fixes: c5a75911 ("net/hsr: Use list_head (and rcu) instead of array for slave devices.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge more updates from Andrew Morton:
 "The rest of MM and the rest of everything else: hotfixes, ipc, misc,
  procfs, lib, cleanups, arm"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (67 commits)
  ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
  treewide: remove redundant IS_ERR() before error code check
  include/linux/cpumask.h: don't calculate length of the input string
  lib: new testcases for bitmap_parse{_user}
  lib: rework bitmap_parse()
  lib: make bitmap_parse_user a wrapper on bitmap_parse
  lib: add test for bitmap_parse()
  bitops: more BITS_TO_* macros
  lib/string: add strnchrnul()
  proc: convert everything to "struct proc_ops"
  proc: decouple proc from VFS with "struct proc_ops"
  asm-generic/tlb: provide MMU_GATHER_TABLE_FREE
  asm-generic/tlb: rename HAVE_MMU_GATHER_NO_GATHER
  asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE
  asm-generic/tlb: rename HAVE_RCU_TABLE_FREE
  asm-generic/tlb: add missing CONFIG symbol
  asm-gemeric/tlb: remove stray function declarations
  asm-generic/tlb: avoid potential double flush
  mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush
  powerpc/mmu_gather: enable RCU_TABLE_FREE even for !SMP case
  ...

Pull drm ttm/mm updates from Dave Airlie:
 "Thomas Hellstrom has some more changes to the TTM layer that needed a
  patch to the mm subsystem.

  This adds a new mm API vmf_insert_mixed_prot to avoid an ugly hack
  that has limitations in the TTM layer"

* tag 'drm-next-2020-02-04' of git://anongit.freedesktop.org/drm/drm:
  mm, drm/ttm: Fix vm page protection handling
  mm: Add a vmf_insert_mixed_prot() function

Merge tag 'tag-chrome-platform-for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux

Pull chrome platform updates from Benson Leung:
 "CrOS EC:

   - Refactoring of some of cros_ec's headers:

     include/linux/mfd/cros_ec.h now removed, new cros_ec.h added to
     drivers/platform/chrome which contains shared operations of cros_ec
     transport drivers.

   - Response tracing in cros_ec_proto

  Wilco EC:

   - Fix unregistration order.

   - Fix keyboard backlight probing on systems without keyboard
     backlight

   - Minor cleanup (newlines in printks, COMPILE_TEST)

  Misc:

   - chromeos_laptop converted to use i2c_new_scanned_device instead of
     i2c_new_probed_device"

* tag 'tag-chrome-platform-for-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
  platform/chrome: cros_ec: Match implementation with headers
  platform/chrome: cros_ec: Drop unaligned.h include
  platform/chrome: wilco_ec: Allow wilco to be compiled in COMPILE_TEST
  platform/chrome: wilco_ec: Add newlines to printks
  platform/chrome: wilco_ec: Fix unregistration order
  cros_ec: treewide: Remove 'include/linux/mfd/cros_ec.h'
  platform/chrome: cros_ec_ishtp: Make init_lock static
  platform/chrome: chromeos_laptop: Convert to i2c_new_scanned_device
  platform/chrome: cros_ec_lpc: Use platform_get_irq_optional() for optional IRQs
  platform/chrome: cros_ec_proto: Add response tracing
  platform/chrome: cros_ec_trace: Match trace commands with EC commands

Pull RTC updates from Alexandre Belloni:
 "The VL_READ and VL_CLR ioctls have been reworked to be more useful.
  This will not break userspace as there are very few users and they are
  using the integer value as a boolean.

  Apart from that, two drivers were reworked and a few fixes here and
  there for a net reduction of number of lines.

  Summary:

  Subsystem:
   - the VL_READ and VL_CLR ioctls are now documented and their behavior
     is unified across all the drivers.
   - RTC_I2C_AND_SPI Kconfig option rework to avoid selecting both
     REGMAP_I2C and REGMAP_SPI unecessarily.

  Drivers:
   - at91rm9200: remove deprecated procfs, add sam9x60, sama5d4 and
     sama5d2 compatibles.
   - cmos: solve lost interrupts issue on MS Surface 3
   - hym8563: return proper errno when time is invalid
   - rv3029: many fixes, nvram support"

* tag 'rtc-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (63 commits)
  dt-bindings: rtc: at91rm9200: document clocks property
  rtc: i2c/spi: Avoid inclusion of REGMAP support when not needed
  rtc: Kconfig: select REGMAP_I2C when necessary
  rtc: Kconfig: properly indent sd3078 entry
  rtc: cmos: Refactor code by using the new dmi_get_bios_year() helper
  rtc: cmos: Use predefined value for RTC IRQ on legacy x86
  rtc: cmos: Stop using shared IRQ
  rtc: tps6586x: Use IRQ_NOAUTOEN flag
  rtc: at91rm9200: use FIELD_PREP/FIELD_GET
  rtc: at91rm9200: avoid time readout in at91_rtc_setalarm
  rtc: at91rm9200: move register definitions to C file
  rtc: at91rm9200: add sama5d4 and sama5d2 compatibles
  dt-bindings: rtc: at91rm9200: convert bindings to json-schema
  rtc: at91rm9200: remove procfs information
  dt-bindings: atmel, at91rm9200-rtc: add microchip, sam9x60-rtc
  rtc: pcf8563: Use BIT
  rtc: moxart: Convert to SPDX identifier
  rtc: ds1343: Remove unused struct spi_device in struct ds1343_priv
  rtc: rx8025: Remove struct i2c_client from struct rx8025_data
  rtc: hym8563: Read the valid flag directly instead of caching it
  ...

max_pfn, as set in arch/arm/mm/init.c:

    static void __init find_limits(unsigned long *min,
				   unsigned long *max_low,
				   unsigned long *max_high)
    {
	    *max_low = PFN_DOWN(memblock_get_current_limit());
	    *min = PFN_UP(memblock_start_of_DRAM());
	    *max_high = PFN_DOWN(memblock_end_of_DRAM());
    }

with memblock_end_of_DRAM() pointing to the next byte after DRAM.  As
such, max_pfn points to the PFN after the end of DRAM.

Thus when using max_pfn to check DMA masks, we should subtract one when
checking DMA ranges against it.

Commit 8bf1268f ("ARM: dma-api: fix off-by-one error in
__dma_supported()") fixed the same issue, but missed this spot.

This issue was found while working on the sun4i-csi v4l2 driver on the
Allwinner R40 SoC.  On Allwinner SoCs, DRAM is offset at 0x40000000, and
we are starting to use of_dma_configure() with the "dma-ranges" property
in the device tree to have the DMA API handle the offset.

In this particular instance, dma-ranges was set to the same range as the
actual available (2 GiB) DRAM.  The following error appeared when the
driver attempted to allocate a buffer:

    sun4i-csi 1c09000.csi: Coherent DMA mask 0x7fffffff (pfn 0x40000-0xc0000)
    covers a smaller range of system memory than the DMA zone pfn 0x0-0xc0001
    sun4i-csi 1c09000.csi: dma_alloc_coherent of size 307200 failed

Fixing the off-by-one error makes things work.

Link: http://lkml.kernel.org/r/20191224030239.5656-1-wens@kernel.org
Fixes: 11a5aa32 ("ARM: dma-mapping: check DMA mask against available memory")
Fixes: 9f28cde0 ("ARM: another fix for the DMA mapping checks")
Fixes: ab746573 ("ARM: dma-mapping: allow larger DMA mask than supported")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

'PTR_ERR(p) == -E*' is a stronger condition than IS_ERR(p).
Hence, IS_ERR(p) is unneeded.

The semantic patch that generates this commit is as follows:

// <smpl>
@@
expression ptr;
constant error_code;
@@
-IS_ERR(ptr) && (PTR_ERR(ptr) == - error_code)
+PTR_ERR(ptr) == - error_code
// </smpl>

Link: http://lkml.kernel.org/r/20200106045833.1725-1-masahiroy@kernel.orgSigned-off-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Acked-by: Stephen Boyd <sboyd@kernel.org> [drivers/clk/clk.c]
Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> [GPIO]
Acked-by: Wolfram Sang <wsa@the-dreams.de> [drivers/i2c]
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [acpi/scan.c]
Acked-by: Rob Herring <robh@kernel.org>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

New design of inner bitmap_parse() allows to avoid calculating the size of
a null-terminated string.

Link: http://lkml.kernel.org/r/20200102043031.30357-8-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

New version of bitmap_parse() is unified with bitmap_parse_list(),
and therefore:

- weakens rules on whitespaces and commas between hex chunks;

- in addition to

- allows passing UINT_MAX or any other big number as the length of input
  string instead of actual string length.

The patch covers the cases.

Link: http://lkml.kernel.org/r/20200102043031.30357-7-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

bitmap_parse() is ineffective and full of opaque variables and opencoded
parts.  It leads to hard understanding and usage of it.  This rework
includes:

- remove bitmap_shift_left() call from the cycle.  Now it makes the
  complexity of the algorithm as O(nbits^2).  In the suggested approach
  the input string is parsed in reverse direction, so no shifts needed;

- relax requirement on a single comma and no white spaces between
  chunks.  It is considered useful in scripting, and it aligns with
  bitmap_parselist();

- split bitmap_parse() to small readable helpers;

- make an explicit calculation of the end of input line at the
  beginning, so users of the bitmap_parse() won't bother doing this.

Link: http://lkml.kernel.org/r/20200102043031.30357-6-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Currently we parse user data byte after byte which leads to
overcomplicating of parsing algorithm.  There are no performance critical
users of bitmap_parse_user(), and so we can duplicate user data to kernel
buffer and simply call bitmap_parselist().  This rework lets us unify and
simplify bitmap_parse() and bitmap_parse_user(), which is done in the
following patch.

Link: http://lkml.kernel.org/r/20200102043031.30357-5-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The test is derived from bitmap_parselist() NO_LEN is reserved for use in
following patches.

[yury.norov@gmail.com: fix rebase issue]
  Link: http://lkml.kernel.org/r/20200102182659.6685-1-yury.norov@gmail.com
[andriy.shevchenko@linux.intel.com: fix address space when test user buffer]
  Link: http://lkml.kernel.org/r/20200109103601.45929-2-andriy.shevchenko@linux.intel.com
Link: http://lkml.kernel.org/r/20200102043031.30357-4-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Introduce BITS_TO_U64, BITS_TO_U32 and BITS_TO_BYTES as they are handy in
the following patches (BITS_TO_U32 specifically).  Reimplement tools/
version of the macros according to the kernel implementation.

Also fix indentation for BITS_PER_TYPE definition.

Link: http://lkml.kernel.org/r/20200102043031.30357-3-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Patch series "lib: rework bitmap_parse", v5.

Similarl to the recently revisited bitmap_parselist(), bitmap_parse() is
ineffective and overcomplicated.  This series reworks it, aligns its
interface with bitmap_parselist() and makes it simpler to use.

The series also adds a test for the function and fixes usage of it in
cpumask_parse() according to the new design - drops the calculating of
length of an input string.

bitmap_parse() takes the array of numbers to be put into the map in the BE
order which is reversed to the natural LE order for bitmaps.  For example,
to construct bitmap containing a bit on the position 42, we have to put a
line '400,0'.  Current implementation reads chunk one by one from the
beginning ('400' before '0') and makes bitmap shift after each successful
parse.  It makes the complexity of the whole process as O(n^2).  We can do
it in reverse direction ('0' before '400') and avoid shifting, but it
requires reverse parsing helpers.

This patch (of 7):

New function works like strchrnul() with a length limited string.

Link: http://lkml.kernel.org/r/20200102043031.30357-2-yury.norov@gmail.comSigned-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Amritha Nambiar <amritha.nambiar@intel.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Tobin C . Harding" <tobin@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Miklos Szeredi <mszeredi@redhat.com>
Cc: Vineet Gupta <vineet.gupta1@synopsys.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The most notable change is DEFINE_SHOW_ATTRIBUTE macro split in
seq_file.h.

Conversion rule is:

	llseek		=> proc_lseek
	unlocked_ioctl	=> proc_ioctl

	xxx		=> proc_xxx

	delete ".owner = THIS_MODULE" line

[akpm@linux-foundation.org: fix drivers/isdn/capi/kcapi_proc.c]
[sfr@canb.auug.org.au: fix kernel/sched/psi.c]
  Link: http://lkml.kernel.org/r/20200122180545.36222f50@canb.auug.org.au
Link: http://lkml.kernel.org/r/20191225172546.GB13378@avx2Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Currently core /proc code uses "struct file_operations" for custom hooks,
however, VFS doesn't directly call them.  Every time VFS expands
file_operations hook set, /proc code bloats for no reason.

Introduce "struct proc_ops" which contains only those hooks which /proc
allows to call into (open, release, read, write, ioctl, mmap, poll).  It
doesn't contain module pointer as well.

Save ~184 bytes per usage:

	add/remove: 26/26 grow/shrink: 1/4 up/down: 1922/-6674 (-4752)
	Function                                     old     new   delta
	sysvipc_proc_ops                               -      72     +72
				...
	config_gz_proc_ops                             -      72     +72
	proc_get_inode                               289     339     +50
	proc_reg_get_unmapped_area                   110     107      -3
	close_pdeo                                   227     224      -3
	proc_reg_open                                289     284      -5
	proc_create_data                              60      53      -7
	rt_cpu_seq_fops                              256       -    -256
				...
	default_affinity_proc_fops                   256       -    -256
	Total: Before=5430095, After=5425343, chg -0.09%

Link: http://lkml.kernel.org/r/20191225172228.GA13378@avx2Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>