Pull tracing fixes from Steven Rostedt:
 "Various tracing fixes:

   - kbuild found missing define of MCOUNT_INSN_SIZE for various build
     configs

   - Initialize variable to zero as gcc thinks it is used undefined (it
     really isn't but the code is subtle enough that this doesn't hurt)

   - Convert from do_div() to div64_ull() to prevent potential divide by
     zero

   - Unregister a trace point on error path in sched_wakeup tracer

   - Use signed offset for archs that can have stext not be first

   - A simple indentation fix (whitespace error)"

* tag 'trace-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix indentation issue
  kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail
  tracing: Change offset type to s32 in preempt/irq tracepoints
  ftrace: Avoid potential division by zero in function profiler
  tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined
  tracing: Define MCOUNT_INSN_SIZE when not defined without direct calls
  tracing: Initialize val to zero in parse_entry of inject code

Pull tpmd fixes from Jarkko Sakkinen:
 "There has been a bunch of reports (e.g. [*]) reporting that when
  commit 5b359c7c ("tpm_tis_core: Turn on the TPM before probing
  IRQ's") and subsequent fixes are applied it causes boot freezes on
  some machines.

  Unfortunately hardware where this causes a failure is not widely
  available (only one I'm aware is Lenovo T490), which means we cannot
  predict yet how long it will take to properly fix tpm_tis interrupt
  probing.

  Thus, the least worst short term action is to revert the code to the
  state before this commit. In long term we need fix the tpm_tis probing
  code to work on machines that Stefan's patches were supposed to fix.

  With these patches reverted nothing fatal happens, TPM is fallbacked
  to be used in polling mode (which is not in the end too bad because
  there are no high throughput workloads for TPM).

  [*] https://bugzilla.kernel.org/show_bug.cgi?id=205935"

* tag 'tpmdd-next-20200106' of git://git.infradead.org/users/jjs/linux-tpmdd:
  tpm: Revert "tpm_tis_core: Turn on the TPM before probing IRQ's"
  tpm: Revert "tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts"
  tpm: Revert "tpm_tis: reserve chip for duration of tpm_tis_core_init"

Pull watchdog fixes from Wim Van Sebroeck:
 - fix module aliases
 - fix potential build errors
 - fix missing conversion of imx7ulp_wdt_enable()
 - fix platform_get_irq() complaints
 - fix NCT6116D support

* tag 'linux-watchdog-5.5-fixes' of git://www.linux-watchdog.org/linux-watchdog:
  watchdog: orion: fix platform_get_irq() complaints
  watchdog: rn5t618_wdt: fix module aliases
  watchdog: tqmx86_wdt: Fix build error
  watchdog: max77620_wdt: fix potential build errors
  watchdog: imx7ulp: Fix missing conversion of imx7ulp_wdt_enable()
  watchdog: w83627hf_wdt: Fix support NCT6116D

Pull spi fixes from Mark Brown:
 "A small collection of fixes here, one to make the newly added PTP
  timestamping code more accurate, a few driver fixes and a fix for the
  core DT binding to document the fact that we support eight wire buses"

* tag 'spi-fix-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: Document Octal mode as valid SPI bus width
  spi: spi-dw: Add lock protect dw_spi rx/tx to prevent concurrent calls
  spi: spi-fsl-dspi: Fix 16-bit word order in 32-bit XSPI mode
  spi: Don't look at TX buffer for PTP system timestamping
  spi: uniphier: Fix FIFO threshold

Merge tag 'regulator-fix-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "Three small fixes here, two the result of Axel Lin's amazing work
  tracking down inconsistencies in drivers"

* tag 'regulator-fix-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: bd70528: Remove .set_ramp_delay for bd70528_ldo_ops
  regulator: axp20x: Fix axp20x_set_ramp_delay
  regulator: axp20x: Fix AXP22x ELDO2 regulator enable bitmask

Pull RTC fixes from Alexandre Belloni:
 "A few fixes for this cycle. The CMOS AltCentury support broke a few
  platforms with a recent BIOS so I reverted it. The mt6397 fix is not
  that critical but good to have. And finally, the sun6i fix repairs
  WiFi and BT on a few platforms.

  Summary:

   - cmos: revert AltCentury support on AMD/Hygon

   - mt6397: fix alarm register overwrite

   - sun6i: ensure clock is working on R40"

* tag 'rtc-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  rtc: cmos: Revert "rtc: Fix the AltCentury value on AMD/Hygon platform"
  rtc: mt6397: fix alarm register overwrite
  rtc: sun6i: Add support for RTC clocks on R40

Pull ARC fixes from Vineet Gupta:
 "Kconfig warning, stale define, duplicate asm-offset entry ..."

* tag 'arc-5.5-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: pt_regs: remove hardcoded registers offset
  ARC: asm-offsets: remove duplicate entry
  ARC: mm: drop stale define of __ARCH_USE_5LEVEL_HACK
  arc: eznps: fix allmodconfig kconfig warning

The ARMv8 64-bit architecture supports execute-only user permissions by
clearing the PTE_USER and PTE_UXN bits, practically making it a mostly
privileged mapping but from which user running at EL0 can still execute.

The downside, however, is that the kernel at EL1 inadvertently reading
such mapping would not trip over the PAN (privileged access never)
protection.

Revert the relevant bits from commit cab15ce6 ("arm64: Introduce
execute-only page access permissions") so that PROT_EXEC implies
PROT_READ (and therefore PTE_USER) until the architecture gains proper
support for execute-only user mappings.

Fixes: cab15ce6 ("arm64: Introduce execute-only page access permissions")
Cc: <stable@vger.kernel.org> # 4.9.x-
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

There has been a bunch of reports (one from kernel bugzilla linked)
reporting that when this commit is applied it causes on some machines
boot freezes.

Unfortunately hardware where this commit causes a failure is not widely
available (only one I'm aware is Lenovo T490), which means we cannot
predict yet how long it will take to properly fix tpm_tis interrupt
probing.

Thus, the least worst short term action is to revert the code to the
state before this commit. In long term we need fix the tpm_tis probing
code to work on machines that Stefan's fix was supposed to fix.

Fixes: 21df4a8b ("tpm_tis: reserve chip for duration of tpm_tis_core_init")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=205935
Cc: stable@vger.kernel.org
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Xiaoping Zhou <xiaoping.zhou@intel.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

There has been a bunch of reports (one from kernel bugzilla linked)
reporting that when this commit is applied it causes on some machines
boot freezes.

Unfortunately hardware where this commit causes a failure is not widely
available (only one I'm aware is Lenovo T490), which means we cannot
predict yet how long it will take to properly fix tpm_tis interrupt
probing.

Thus, the least worst short term action is to revert the code to the
state before this commit. In long term we need fix the tpm_tis probing
code to work on machines that Stefan's fix was supposed to fix.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=205935
Fixes: 1ea32c83 ("tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts")
Cc: stable@vger.kernel.org
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Xiaoping Zhou <xiaoping.zhou@intel.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Revert a commit, which was included in Linux v5.5-rc3 because it did not
properly fix the issues it was supposed to fix.

Fixes: 21df4a8b ("tpm_tis: reserve chip for duration of tpm_tis_core_init")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=205935
Cc: stable@vger.kernel.org
Cc: Jerry Snitselaar <jsnitsel@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Xiaoping Zhou <xiaoping.zhou@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Pull RISC-V fixes from Paul Walmsley:
 "Several fixes for RISC-V:

   - Fix function graph trace support

   - Prefix the CSR IRQ_* macro names with "RV_", to avoid collisions
     with macros elsewhere in the Linux kernel tree named "IRQ_TIMER"

   - Use __pa_symbol() when computing the physical address of a kernel
     symbol, rather than __pa()

   - Mark the RISC-V port as supporting GCOV

  One DT addition:

   - Describe the L2 cache controller in the FU540 DT file

  One documentation update:

   - Add patch acceptance guideline documentation"

* tag 'riscv/for-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  Documentation: riscv: add patch acceptance guidelines
  riscv: prefix IRQ_ macro names with an RV_ namespace
  clocksource: riscv: add notrace to riscv_sched_clock
  riscv: ftrace: correct the condition logic in function graph tracer
  riscv: dts: Add DT support for SiFive L2 cache controller
  riscv: gcov: enable gcov for RISC-V
  riscv: mm: use __pa_symbol for kernel symbols

Formalize, in kernel documentation, the patch acceptance policy for
arch/riscv.  In summary, it states that as maintainers, we plan to
only accept patches for new modules or extensions that have been
frozen or ratified by the RISC-V Foundation.

We've been following these guidelines for the past few months.  In the
meantime, we've received quite a bit of feedback that it would be
helpful to have these guidelines formally documented.

Based on a suggestion from Matthew Wilcox, we also add a link to this
file to Documentation/process/index.rst, to make this document easier
to find.  The format of this document has also been changed to align
to the format outlined in the maintainer entry profiles, in accordance
with comments from Jon Corbet and Dan Williams.
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Krste Asanovic <krste@berkeley.edu>
Cc: Andrew Waterman <waterman@eecs.berkeley.edu>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>

"IRQ_TIMER", used in the arch/riscv CSR header file, is a sufficiently
generic macro name that it's used by several source files across the
Linux code base.  Some of these other files ultimately include the
arch/riscv CSR include file, causing collisions.  Fix by prefixing the
RISC-V csr.h IRQ_ macro names with an RV_ prefix.

Fixes: a4c3733d ("riscv: abstract out CSR names for supervisor vs machine mode")
Reported-by: Olof Johansson <olof@lixom.net>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

When enabling ftrace graph tracer, it gets the tracing clock in
ftrace_push_return_trace().  Eventually, it invokes riscv_sched_clock()
to get the clock value.  If riscv_sched_clock() isn't marked with
'notrace', it will call ftrace_push_return_trace() and cause infinite
loop.

The result of failure as follow:

command: echo function_graph >current_tracer
[   46.176787] Unable to handle kernel paging request at virtual address ffffffe04fb38c48
[   46.177309] Oops [#1]
[   46.177478] Modules linked in:
[   46.177770] CPU: 0 PID: 256 Comm: $d Not tainted 5.5.0-rc1 #47
[   46.177981] epc: ffffffe00035e59a ra : ffffffe00035e57e sp : ffffffe03a7569b0
[   46.178216]  gp : ffffffe000d29b90 tp : ffffffe03a756180 t0 : ffffffe03a756968
[   46.178430]  t1 : ffffffe00087f408 t2 : ffffffe03a7569a0 s0 : ffffffe03a7569f0
[   46.178643]  s1 : ffffffe00087f408 a0 : 0000000ac054cda4 a1 : 000000000087f411
[   46.178856]  a2 : 0000000ac054cda4 a3 : 0000000000373ca0 a4 : ffffffe04fb38c48
[   46.179099]  a5 : 00000000153e22a8 a6 : 00000000005522ff a7 : 0000000000000005
[   46.179338]  s2 : ffffffe03a756a90 s3 : ffffffe00032811c s4 : ffffffe03a756a58
[   46.179570]  s5 : ffffffe000d29fe0 s6 : 0000000000000001 s7 : 0000000000000003
[   46.179809]  s8 : 0000000000000003 s9 : 0000000000000002 s10: 0000000000000004
[   46.180053]  s11: 0000000000000000 t3 : 0000003fc815749c t4 : 00000000000efc90
[   46.180293]  t5 : ffffffe000d29658 t6 : 0000000000040000
[   46.180482] status: 0000000000000100 badaddr: ffffffe04fb38c48 cause: 000000000000000f
Signed-off-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
[paul.walmsley@sifive.com: cleaned up patch description]
Fixes: 92e0d143 ("clocksource/drivers/riscv_timer: Provide the sched_clock")
Cc: stable@vger.kernel.org
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

Merge misc fixes from Andrew Morton:
 "17 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  hexagon: define ioremap_uc
  ocfs2: fix the crash due to call ocfs2_get_dlm_debug once less
  ocfs2: call journal flush to mark journal as empty after journal recovery when mount
  mm/hugetlb: defer freeing of huge pages if in non-task context
  mm/gup: fix memory leak in __gup_benchmark_ioctl
  mm/oom: fix pgtables units mismatch in Killed process message
  fs/posix_acl.c: fix kernel-doc warnings
  hexagon: work around compiler crash
  hexagon: parenthesize registers in asm predicates
  fs/namespace.c: make to_mnt_ns() static
  fs/nsfs.c: include headers for missing declarations
  fs/direct-io.c: include fs/internal.h for missing prototype
  mm: move_pages: return valid node id in status if the page is already on the target node
  memcg: account security cred as well to kmemcg
  kcov: fix struct layout for kcov_remote_arg
  mm/zsmalloc.c: fix the migrated zspage statistics.
  mm/memory_hotplug: shrink zones when offlining memory

Merge tag 'apparmor-pr-2020-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

Pull apparmor fixes from John Johansen:

 - performance regression: only get a label reference if the fast path
   check fails

 - fix aa_xattrs_match() may sleep while holding a RCU lock

 - fix bind mounts aborting with -ENOMEM

* tag 'apparmor-pr-2020-01-04' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor:
  apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock
  apparmor: only get a label reference if the fast path check fails
  apparmor: fix bind mounts aborting with -ENOMEM

aa_xattrs_match() is unfortunately calling vfs_getxattr_alloc() from a
context protected by an rcu_read_lock. This can not be done as
vfs_getxattr_alloc() may sleep regardles of the gfp_t value being
passed to it.

Fix this by breaking the rcu_read_lock on the policy search when the
xattr match feature is requested and restarting the search if a policy
changes occur.

Fixes: 8e51f908 ("apparmor: Add support for attaching profiles via xattr, presence and value")
Reported-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: John Johansen <john.johansen@canonical.com>

Pull MIPS fixes from Paul Burton:
 "A collection of MIPS fixes:

   - Fill the struct cacheinfo shared_cpu_map field with sensible
     values, notably avoiding issues with perf which was unhappy in the
     absence of these values.

   - A boot fix for Loongson 2E & 2F machines which was fallout from
     some refactoring performed this cycle.

   - A Kconfig dependency fix for the Loongson CPU HWMon driver.

   - A couple of VDSO fixes, ensuring gettimeofday() behaves
     appropriately for kernel configurations that don't include support
     for a clocksource the VDSO can use & fixing the calling convention
     for the n32 & n64 VDSOs which would previously clobber the $gp/$28
     register.

   - A build fix for vmlinuz compressed images which were
     inappropriately building with -fsanitize-coverage despite not being
     part of the kernel proper, then failing to link due to the missing
     __sanitizer_cov_trace_pc() function.

   - A couple of eBPF JIT fixes, including disabling it for MIPS32 due
     to a large number of issues with the code generated there &
     reflecting ISA dependencies in Kconfig to enforce that systems
     which don't support the JIT must include the interpreter"

* tag 'mips_fixes_5.5_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Avoid VDSO ABI breakage due to global register variable
  MIPS: BPF: eBPF JIT: check for MIPS ISA compliance in Kconfig
  MIPS: BPF: Disable MIPS32 eBPF JIT
  MIPS: Prevent link failure with kcov instrumentation
  MIPS: Kconfig: Use correct form for 'depends on'
  mips: Fix gettimeofday() in the vdso library
  MIPS: Fix boot on Fuloong2 systems
  mips: cacheinfo: report shared CPU map

Similar to commit 38e45d81 ("sparc64: implement ioremap_uc") define
ioremap_uc for hexagon to avoid errors from
-Wimplicit-function-definition.

Link: http://lkml.kernel.org/r/20191209222956.239798-2-ndesaulniers@google.com
Link: https://github.com/ClangBuiltLinux/linux/issues/797
Fixes: e537654b ("lib: devres: add a helper function for ioremap_uc")
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Brian Cain <bcain@codeaurora.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Tuowen Zhao <ztuowen@gmail.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Will Deacon <will@kernel.org>
Cc: Richard Fontana <rfontana@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Because ocfs2_get_dlm_debug() function is called once less here, ocfs2
file system will trigger the system crash, usually after ocfs2 file
system is unmounted.

This system crash is caused by a generic memory corruption, these crash
backtraces are not always the same, for exapmle,

    ocfs2: Unmounting device (253,16) on (node 172167785)
    general protection fault: 0000 [#1] SMP PTI
    CPU: 3 PID: 14107 Comm: fence_legacy Kdump:
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
    RIP: 0010:__kmalloc+0xa5/0x2a0
    Code: 00 00 4d 8b 07 65 4d 8b
    RSP: 0018:ffffaa1fc094bbe8 EFLAGS: 00010286
    RAX: 0000000000000000 RBX: d310a8800d7a3faf RCX: 0000000000000000
    RDX: 0000000000000000 RSI: 0000000000000dc0 RDI: ffff96e68fc036c0
    RBP: d310a8800d7a3faf R08: ffff96e6ffdb10a0 R09: 00000000752e7079
    R10: 000000000001c513 R11: 0000000004091041 R12: 0000000000000dc0
    R13: 0000000000000039 R14: ffff96e68fc036c0 R15: ffff96e68fc036c0
    FS:  00007f699dfba540(0000) GS:ffff96e6ffd80000(0000) knlGS:00000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000055f3a9d9b768 CR3: 000000002cd1c000 CR4: 00000000000006e0
    Call Trace:
     ext4_htree_store_dirent+0x35/0x100 [ext4]
     htree_dirblock_to_tree+0xea/0x290 [ext4]
     ext4_htree_fill_tree+0x1c1/0x2d0 [ext4]
     ext4_readdir+0x67c/0x9d0 [ext4]
     iterate_dir+0x8d/0x1a0
     __x64_sys_getdents+0xab/0x130
     do_syscall_64+0x60/0x1f0
     entry_SYSCALL_64_after_hwframe+0x49/0xbe
    RIP: 0033:0x7f699d33a9fb

This regression problem was introduced by commit e581595e ("ocfs: no
need to check return value of debugfs_create functions").

Link: http://lkml.kernel.org/r/20191225061501.13587-1-ghe@suse.com
Fixes: e581595e ("ocfs: no need to check return value of debugfs_create functions")
Signed-off-by: Gang He <ghe@suse.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>	[5.3+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

If journal is dirty when mount, it will be replayed but jbd2 sb log tail
cannot be updated to mark a new start because journal->j_flag has
already been set with JBD2_ABORT first in journal_init_common.

When a new transaction is committed, it will be recored in block 1
first(journal->j_tail is set to 1 in journal_reset).  If emergency
restart happens again before journal super block is updated
unfortunately, the new recorded trans will not be replayed in the next
mount.

The following steps describe this procedure in detail.
1. mount and touch some files
2. these transactions are committed to journal area but not checkpointed
3. emergency restart
4. mount again and its journals are replayed
5. journal super block's first s_start is 1, but its s_seq is not updated
6. touch a new file and its trans is committed but not checkpointed
7. emergency restart again
8. mount and journal is dirty, but trans committed in 6 will not be
replayed.

This exception happens easily when this lun is used by only one node.
If it is used by multi-nodes, other node will replay its journal and its
journal super block will be updated after recovery like what this patch
does.

ocfs2_recover_node->ocfs2_replay_journal.

The following jbd2 journal can be generated by touching a new file after
journal is replayed, and seq 15 is the first valid commit, but first seq
is 13 in journal super block.

logdump:
  Block 0: Journal Superblock
  Seq: 0   Type: 4 (JBD2_SUPERBLOCK_V2)
  Blocksize: 4096   Total Blocks: 32768   First Block: 1
  First Commit ID: 13   Start Log Blknum: 1
  Error: 0
  Feature Compat: 0
  Feature Incompat: 2 block64
  Feature RO compat: 0
  Journal UUID: 4ED3822C54294467A4F8E87D2BA4BC36
  FS Share Cnt: 1   Dynamic Superblk Blknum: 0
  Per Txn Block Limit    Journal: 0    Data: 0

  Block 1: Journal Commit Block
  Seq: 14   Type: 2 (JBD2_COMMIT_BLOCK)

  Block 2: Journal Descriptor
  Seq: 15   Type: 1 (JBD2_DESCRIPTOR_BLOCK)
  No. Blocknum        Flags
   0. 587             none
  UUID: 00000000000000000000000000000000
   1. 8257792         JBD2_FLAG_SAME_UUID
   2. 619             JBD2_FLAG_SAME_UUID
   3. 24772864        JBD2_FLAG_SAME_UUID
   4. 8257802         JBD2_FLAG_SAME_UUID
   5. 513             JBD2_FLAG_SAME_UUID JBD2_FLAG_LAST_TAG
  ...
  Block 7: Inode
  Inode: 8257802   Mode: 0640   Generation: 57157641 (0x3682809)
  FS Generation: 2839773110 (0xa9437fb6)
  CRC32: 00000000   ECC: 0000
  Type: Regular   Attr: 0x0   Flags: Valid
  Dynamic Features: (0x1) InlineData
  User: 0 (root)   Group: 0 (root)   Size: 7
  Links: 1   Clusters: 0
  ctime: 0x5de5d870 0x11104c61 -- Tue Dec  3 11:37:20.286280801 2019
  atime: 0x5de5d870 0x113181a1 -- Tue Dec  3 11:37:20.288457121 2019
  mtime: 0x5de5d870 0x11104c61 -- Tue Dec  3 11:37:20.286280801 2019
  dtime: 0x0 -- Thu Jan  1 08:00:00 1970
  ...
  Block 9: Journal Commit Block
  Seq: 15   Type: 2 (JBD2_COMMIT_BLOCK)

The following is journal recovery log when recovering the upper jbd2
journal when mount again.

syslog:
  ocfs2: File system on device (252,1) was not unmounted cleanly, recovering it.
  fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 0
  fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 1
  fs/jbd2/recovery.c:(do_one_pass, 449): Starting recovery pass 2
  fs/jbd2/recovery.c:(jbd2_journal_recover, 278): JBD2: recovery, exit status 0, recovered transactions 13 to 13

Due to first commit seq 13 recorded in journal super is not consistent
with the value recorded in block 1(seq is 14), journal recovery will be
terminated before seq 15 even though it is an unbroken commit, inode
8257802 is a new file and it will be lost.

Link: http://lkml.kernel.org/r/20191217020140.2197-1-li.kai4@h3c.comSigned-off-by: Kai Li <li.kai4@h3c.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Changwei Ge <gechangwei@live.cn>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The following lockdep splat was observed when a certain hugetlbfs test
was run:

  ================================
  WARNING: inconsistent lock state
  4.18.0-159.el8.x86_64+debug #1 Tainted: G        W --------- -  -
  --------------------------------
  inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
  swapper/30/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
  ffffffff9acdc038 (hugetlb_lock){+.?.}, at: free_huge_page+0x36f/0xaa0
  {SOFTIRQ-ON-W} state was registered at:
    lock_acquire+0x14f/0x3b0
    _raw_spin_lock+0x30/0x70
    __nr_hugepages_store_common+0x11b/0xb30
    hugetlb_sysctl_handler_common+0x209/0x2d0
    proc_sys_call_handler+0x37f/0x450
    vfs_write+0x157/0x460
    ksys_write+0xb8/0x170
    do_syscall_64+0xa5/0x4d0
    entry_SYSCALL_64_after_hwframe+0x6a/0xdf
  irq event stamp: 691296
  hardirqs last  enabled at (691296): [<ffffffff99bb034b>] _raw_spin_unlock_irqrestore+0x4b/0x60
  hardirqs last disabled at (691295): [<ffffffff99bb0ad2>] _raw_spin_lock_irqsave+0x22/0x81
  softirqs last  enabled at (691284): [<ffffffff97ff0c63>] irq_enter+0xc3/0xe0
  softirqs last disabled at (691285): [<ffffffff97ff0ebe>] irq_exit+0x23e/0x2b0

  other info that might help us debug this:
   Possible unsafe locking scenario:

         CPU0
         ----
    lock(hugetlb_lock);
    <Interrupt>
      lock(hugetlb_lock);

   *** DEADLOCK ***
      :
  Call Trace:
   <IRQ>
   __lock_acquire+0x146b/0x48c0
   lock_acquire+0x14f/0x3b0
   _raw_spin_lock+0x30/0x70
   free_huge_page+0x36f/0xaa0
   bio_check_pages_dirty+0x2fc/0x5c0
   clone_endio+0x17f/0x670 [dm_mod]
   blk_update_request+0x276/0xe50
   scsi_end_request+0x7b/0x6a0
   scsi_io_completion+0x1c6/0x1570
   blk_done_softirq+0x22e/0x350
   __do_softirq+0x23d/0xad8
   irq_exit+0x23e/0x2b0
   do_IRQ+0x11a/0x200
   common_interrupt+0xf/0xf
   </IRQ>

Both the hugetbl_lock and the subpool lock can be acquired in
free_huge_page().  One way to solve the problem is to make both locks
irq-safe.  However, Mike Kravetz had learned that the hugetlb_lock is
held for a linear scan of ALL hugetlb pages during a cgroup reparentling
operation.  So it is just too long to have irq disabled unless we can
break hugetbl_lock down into finer-grained locks with shorter lock hold
times.

Another alternative is to defer the freeing to a workqueue job.  This
patch implements the deferred freeing by adding a free_hpage_workfn()
work function to do the actual freeing.  The free_huge_page() call in a
non-task context saves the page to be freed in the hpage_freelist linked
list in a lockless manner using the llist APIs.

The generic workqueue is used to process the work, but a dedicated
workqueue can be used instead if it is desirable to have the huge page
freed ASAP.

Thanks to Kirill Tkhai <ktkhai@virtuozzo.com> for suggesting the use of
llist APIs which simplfy the code.

Link: http://lkml.kernel.org/r/20191217170331.30893-1-longman@redhat.comSigned-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

In the implementation of __gup_benchmark_ioctl() the allocated pages
should be released before returning in case of an invalid cmd.  Release
pages via kvfree().

[akpm@linux-foundation.org: rework code flow, return -EINVAL rather than -1]
Link: http://lkml.kernel.org/r/20191211174653.4102-1-navid.emamdoost@gmail.com
Fixes: 714a3a1e ("mm/gup_benchmark.c: add additional pinning methods")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

pr_err() expects kB, but mm_pgtables_bytes() returns the number of bytes.
As everything else is printed in kB, I chose to fix the value rather than
the string.

Before:

[  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
...
[   1878]  1000  1878   217253   151144  1269760        0             0 python
...
Out of memory: Killed process 1878 (python) total-vm:869012kB, anon-rss:604572kB, file-rss:4kB, shmem-rss:0kB, UID:1000 pgtables:1269760kB oom_score_adj:0

After:

[  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
...
[   1436]  1000  1436   217253   151890  1294336        0             0 python
...
Out of memory: Killed process 1436 (python) total-vm:869012kB, anon-rss:607516kB, file-rss:44kB, shmem-rss:0kB, UID:1000 pgtables:1264kB oom_score_adj:0

Link: http://lkml.kernel.org/r/20191211202830.1600-1-idryomov@gmail.com
Fixes: 70cb6d26 ("mm/oom: add oom_score_adj and pgtables to Killed process message")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Edward Chron <echron@arista.com>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Fix kernel-doc warnings in fs/posix_acl.c.
Also fix one typo (setgit -> setgid).

  fs/posix_acl.c:647: warning: Function parameter or member 'inode' not described in 'posix_acl_update_mode'
  fs/posix_acl.c:647: warning: Function parameter or member 'mode_p' not described in 'posix_acl_update_mode'
  fs/posix_acl.c:647: warning: Function parameter or member 'acl' not described in 'posix_acl_update_mode'

Link: http://lkml.kernel.org/r/29b0dc46-1f28-a4e5-b1d0-ba2b65629779@infradead.org
Fixes: 07393101 ("posix_acl: Clear SGID bit when setting file permissions")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Jan Kara <jack@suse.cz>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Clang cannot translate the string "r30" into a valid register yet.

Link: https://github.com/ClangBuiltLinux/linux/issues/755
Link: http://lkml.kernel.org/r/20191028155722.23419-1-ndesaulniers@google.comSigned-off-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Sid Manning <sidneym@quicinc.com>
Reviewed-by: Brian Cain <bcain@codeaurora.org>
Cc: Allison Randal <allison@lohutok.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Richard Fontana <rfontana@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Hexagon requires that register predicates in assembly be parenthesized.

Link: https://github.com/ClangBuiltLinux/linux/issues/754
Link: http://lkml.kernel.org/r/20191209222956.239798-3-ndesaulniers@google.comSigned-off-by: Nick Desaulniers <ndesaulniers@google.com>
Suggested-by: Sid Manning <sidneym@codeaurora.org>
Acked-by: Brian Cain <bcain@codeaurora.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Tuowen Zhao <ztuowen@gmail.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Allison Randal <allison@lohutok.net>
Cc: Will Deacon <will@kernel.org>
Cc: Richard Fontana <rfontana@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Make to_mnt_ns() static to address the following 'sparse' warning:

    fs/namespace.c:1731:22: warning: symbol 'to_mnt_ns' was not declared. Should it be static?

Link: http://lkml.kernel.org/r/20191209234830.156260-1-ebiggers@kernel.orgSigned-off-by: Eric Biggers <ebiggers@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Include linux/proc_fs.h and fs/internal.h to address the following
'sparse' warnings:

    fs/nsfs.c:41:32: warning: symbol 'ns_dentry_operations' was not declared. Should it be static?
    fs/nsfs.c:145:5: warning: symbol 'open_related_ns' was not declared. Should it be static?

Link: http://lkml.kernel.org/r/20191209234822.156179-1-ebiggers@kernel.orgSigned-off-by: Eric Biggers <ebiggers@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Include fs/internal.h to address the following 'sparse' warning:

    fs/direct-io.c:591:5: warning: symbol 'sb_init_dio_done_wq' was not declared. Should it be static?

Link: http://lkml.kernel.org/r/20191209234544.128302-1-ebiggers@kernel.orgSigned-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Felix Abecassis reports move_pages() would return random status if the
pages are already on the target node by the below test program:

  int main(void)
  {
	const long node_id = 1;
	const long page_size = sysconf(_SC_PAGESIZE);
	const int64_t num_pages = 8;

	unsigned long nodemask =  1 << node_id;
	long ret = set_mempolicy(MPOL_BIND, &nodemask, sizeof(nodemask));
	if (ret < 0)
		return (EXIT_FAILURE);

	void **pages = malloc(sizeof(void*) * num_pages);
	for (int i = 0; i < num_pages; ++i) {
		pages[i] = mmap(NULL, page_size, PROT_WRITE | PROT_READ,
				MAP_PRIVATE | MAP_POPULATE | MAP_ANONYMOUS,
				-1, 0);
		if (pages[i] == MAP_FAILED)
			return (EXIT_FAILURE);
	}

	ret = set_mempolicy(MPOL_DEFAULT, NULL, 0);
	if (ret < 0)
		return (EXIT_FAILURE);

	int *nodes = malloc(sizeof(int) * num_pages);
	int *status = malloc(sizeof(int) * num_pages);
	for (int i = 0; i < num_pages; ++i) {
		nodes[i] = node_id;
		status[i] = 0xd0; /* simulate garbage values */
	}

	ret = move_pages(0, num_pages, pages, nodes, status, MPOL_MF_MOVE);
	printf("move_pages: %ld\n", ret);
	for (int i = 0; i < num_pages; ++i)
		printf("status[%d] = %d\n", i, status[i]);
  }

Then running the program would return nonsense status values:

  $ ./move_pages_bug
  move_pages: 0
  status[0] = 208
  status[1] = 208
  status[2] = 208
  status[3] = 208
  status[4] = 208
  status[5] = 208
  status[6] = 208
  status[7] = 208

This is because the status is not set if the page is already on the
target node, but move_pages() should return valid status as long as it
succeeds.  The valid status may be errno or node id.

We can't simply initialize status array to zero since the pages may be
not on node 0.  Fix it by updating status with node id which the page is
already on.

Link: http://lkml.kernel.org/r/1575584353-125392-1-git-send-email-yang.shi@linux.alibaba.com
Fixes: a49bd4d7 ("mm, numa: rework do_pages_move")
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Reported-by: Felix Abecassis <fabecassis@nvidia.com>
Tested-by: Felix Abecassis <fabecassis@nvidia.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: <stable@vger.kernel.org>	[4.17+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

The cred_jar kmem_cache is already memcg accounted in the current kernel
but cred->security is not.  Account cred->security to kmemcg.

Recently we saw high root slab usage on our production and on further
inspection, we found a buggy application leaking processes.  Though that
buggy application was contained within its memcg but we observe much
more system memory overhead, couple of GiBs, during that period.  This
overhead can adversely impact the isolation on the system.

One source of high overhead we found was cred->security objects, which
have a lifetime of at least the life of the process which allocated
them.

Link: http://lkml.kernel.org/r/20191205223721.40034-1-shakeelb@google.comSigned-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Chris Down <chris@chrisdown.name>
Reviewed-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Make the layout of kcov_remote_arg the same for 32-bit and 64-bit code.
This makes it more convenient to write userspace apps that can be
compiled into 32-bit or 64-bit binaries and still work with the same
64-bit kernel.

Also use proper __u32 types in uapi headers instead of unsigned ints.

Link: http://lkml.kernel.org/r/9e91020876029cfefc9211ff747685eba9536426.1575638983.git.andreyknvl@google.com
Fixes: eec028c9 ("kcov: remote coverage support")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Cc: "Jacky . Cao @ sony . com" <Jacky.Cao@sony.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

When zspage is migrated to the other zone, the zone page state should be
updated as well, otherwise the NR_ZSPAGE for each zone shows wrong
counts including proc/zoneinfo in practice.

Link: http://lkml.kernel.org/r/1575434841-48009-1-git-send-email-chanho.min@lge.com
Fixes: 91537fee ("mm: add NR_ZSMALLOC to vmstat")
Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Jinsuk Choi <jjinsuk.choi@lge.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>        [4.9+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

We currently try to shrink a single zone when removing memory.  We use
the zone of the first page of the memory we are removing.  If that
memmap was never initialized (e.g., memory was never onlined), we will
read garbage and can trigger kernel BUGs (due to a stale pointer):

    BUG: unable to handle page fault for address: 000000000000353d
    #PF: supervisor write access in kernel mode
    #PF: error_code(0x0002) - not-present page
    PGD 0 P4D 0
    Oops: 0002 [#1] SMP PTI
    CPU: 1 PID: 7 Comm: kworker/u8:0 Not tainted 5.3.0-rc5-next-20190820+ #317
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.4
    Workqueue: kacpi_hotplug acpi_hotplug_work_fn
    RIP: 0010:clear_zone_contiguous+0x5/0x10
    Code: 48 89 c6 48 89 c3 e8 2a fe ff ff 48 85 c0 75 cf 5b 5d c3 c6 85 fd 05 00 00 01 5b 5d c3 0f 1f 840
    RSP: 0018:ffffad2400043c98 EFLAGS: 00010246
    RAX: 0000000000000000 RBX: 0000000200000000 RCX: 0000000000000000
    RDX: 0000000000200000 RSI: 0000000000140000 RDI: 0000000000002f40
    RBP: 0000000140000000 R08: 0000000000000000 R09: 0000000000000001
    R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000140000
    R13: 0000000000140000 R14: 0000000000002f40 R15: ffff9e3e7aff3680
    FS:  0000000000000000(0000) GS:ffff9e3e7bb00000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 000000000000353d CR3: 0000000058610000 CR4: 00000000000006e0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
     __remove_pages+0x4b/0x640
     arch_remove_memory+0x63/0x8d
     try_remove_memory+0xdb/0x130
     __remove_memory+0xa/0x11
     acpi_memory_device_remove+0x70/0x100
     acpi_bus_trim+0x55/0x90
     acpi_device_hotplug+0x227/0x3a0
     acpi_hotplug_work_fn+0x1a/0x30
     process_one_work+0x221/0x550
     worker_thread+0x50/0x3b0
     kthread+0x105/0x140
     ret_from_fork+0x3a/0x50
    Modules linked in:
    CR2: 000000000000353d

Instead, shrink the zones when offlining memory or when onlining failed.
Introduce and use remove_pfn_range_from_zone(() for that.  We now
properly shrink the zones, even if we have DIMMs whereby

 - Some memory blocks fall into no zone (never onlined)

 - Some memory blocks fall into multiple zones (offlined+re-onlined)

 - Multiple memory blocks that fall into different zones

Drop the zone parameter (with a potential dubious value) from
__remove_pages() and __remove_section().

Link: http://lkml.kernel.org/r/20191006085646.5768-6-david@redhat.com
Fixes: f1dd2cd1 ("mm, memory_hotplug: do not associate hotadded memory to zones until online")	[visible after d0dc12e8]
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: <stable@vger.kernel.org>	[5.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull dmaengine fixes from Vinod Koul:
 "A bunch of fixes for:

   - uninitialized dma_slave_caps access

   - virt-dma use after free in vchan_complete()

   - driver fixes for ioat, k3dma and jz4780"

* tag 'dmaengine-fix-5.5-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
  ioat: ioat_alloc_ring() failure handling.
  dmaengine: virt-dma: Fix access after free in vchan_complete()
  dmaengine: k3dma: Avoid null pointer traversal
  dmaengine: dma-jz4780: Also break descriptor chains on JZ4725B
  dmaengine: Fix access to uninitialized dma_slave_caps

Pull media fixes from Mauro Carvalho Chehab:

 - some fixes at CEC core to comply with HDMI 2.0 specs and fix some
   border cases

 - a fix at the transmission logic of the pulse8-cec driver

 - one alignment fix on a data struct at ipu3 when built with 32 bits

* tag 'media/v5.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: intel-ipu3: Align struct ipu3_uapi_awb_fr_config_s to 32 bytes
  media: pulse8-cec: fix lost cec_transmit_attempt_done() call
  media: cec: check 'transmit_in_progress', not 'transmitting'
  media: cec: avoid decrementing transmit_queue_sz if it is 0
  media: cec: CEC 2.0-only bcast messages were ignored

There are multiple reports of this patch breaking RTC time setting for AMD
platforms.

This reverts commit 7ad295d5.

Cc: Jinke Fan <fanjinke@hygon.cn>
Link: https://lore.kernel.org/r/CABXGCsMLob0DC25JS8wwAYydnDoHBSoMh2_YLPfqm3TTvDE-Zw@mail.gmail.com
Fixes: 7ad295d5 ("rtc: Fix the AltCentury value on AMD/Hygon platform")
Link: https://lore.kernel.org/r/20200104043110.707810-1-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>