Currently, "echo 0 > /proc/fs/cifs/Stats" resets all of the stats
except the session and share reconnect counts.  Fix it to
reset those as well.

CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>

When "backup intent" is requested on the mount (e.g. backupuid or
backupgid mount options), the corresponding flag was missing from
some of the new compounding operations as well (now that
open_query_close is gone).

Related to kernel bugzilla #200953

Reported-and-tested-by: <whh@rubrik.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

So we don't overflow the io vector arrays accidentally
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Get rid of smb2_open_op_close() as all operations are now migrated
to smb2_compound_op().
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

We never pass is_falloc==true here anyway and if we ever need to support
is_falloc in the future, SMB2_set_eof is such a trivial wrapper around
send_set_info() that we can/should just create a differently named wrapper
for that new functionality.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Cuts number of network roundtrips significantly for some common syscalls
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

This changes SMB2_OP_SET_EOF to use compounding in some situations.
This is part of the path based API to truncate a file.
Most of the time this will however not be invoked for SMB2 since
cifs_set_file_size() will as far as I can tell almost always just
open the file synchronously and switch to the handle based truncate
code path, thus bypassing the compounding we add here.

Rewriting cifs_set_file_size() and make that whole pile of code more
compounding friendly, and also easier to read and understand, is a
different project though and not for this patch.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

This and previous patches drop the number of roundtrips we need for rmdir()
from 6 to 2.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

so that we can use these later for compounded set-info calls.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

This,and previous patches, drops the number of roundtrips from five to two
for unlink()
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

This with the previous patch changes mkdir() from needing 6 roundtrips to
just 3.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

This turns most open/query-info/close patterns in cifs.ko
to become compounds.

This changes stat from using 3 roundtrips to just a single one.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

When processing the mids for compounds we would only add credits based on
the last successful mid in the compound which would leak credits and
eventually triggering a re-connect.

Fix this by splitting the mid processing part into two loops instead of one
where the first loop just waits for all mids and then counts how many
credits we were granted for the whole compound.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Add tracepoint to catch potential cases where a pending operation overlapping a
reconnect could fail and incorrectly refund its credits causing the client
to think it has more credits available than the server thinks it does.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

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

fs/cifs/ioctl.c: In function 'cifs_ioctl':
fs/cifs/ioctl.c:164:23: warning:
 variable 'cifs_sb' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Use kmemdup rather than duplicating its implementation
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

Some servers (e.g. Azure) return "STATUS_NOT_IMPLEMENTED" rather
than "STATUS_INVALID_DEVICE_REQUEST" on query network interface
info at mount.  This shouldn't cause us to log a warning message
automatically.  Don't log this unless noisier cifsFYI is enabled.
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

Pull parisc updates from Helge Deller:
 "Lots of small fixes and enhancements, most noteably:

   - Many TLB and cache flush optimizations (Dave)

   - Fixed HPMC/crash handler on 64-bit kernel (Dave and myself)

   - Added alternative infrastructre. The kernel now live-patches itself
     for various situations, e.g. replace SMP code when running on one
     CPU only or drop cache flushes when system has no cache installed.

   - vmlinuz now contains a full copy of the compressed vmlinux file.
     This simplifies debugging the currently booted kernel.

   - Unused driver removal (Christoph)

   - Reduced warnings of Dino PCI bridge when running in qemu

   - Removed gcc version check (Masahiro)"

* 'parisc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: (23 commits)
  parisc: Retrieve and display the PDC PAT capabilities
  parisc: Optimze cache flush algorithms
  parisc: Remove pte_inserted define
  parisc: Add PDC PAT cell_info() and pd_get_pdc_revisions() functions
  parisc: Drop two instructions from pte lookup code
  parisc: Use zdep for shlw macro on PA1.1 and PA2.0
  parisc: Add alternative coding infrastructure
  parisc: Include compressed vmlinux file in vmlinuz boot kernel
  extract-vmlinux: Check for uncompressed image as fallback
  parisc: Fix address in HPMC IVA
  parisc: Fix exported address of os_hpmc handler
  parisc: Fix map_pages() to not overwrite existing pte entries
  parisc: Purge TLB entries after updating page table entry and set page accessed flag in TLB handler
  parisc: Release spinlocks using ordered store
  parisc: Ratelimit dino stuck interrupt warnings
  parisc: dino: Utilize DINO_MASK_IRQ() macro
  parisc: Clean up crash header output
  parisc: Add SYSTEM_INFO and REGISTER TOC PAT functions
  parisc: Remove PTE load and fault check from L2_ptep macro
  parisc: Reorder TLB flush timing calculation
  ...

Pull ARM updates from Russell King:
 "The main item in this pull request are the Spectre variant 1.1 fixes
  from Julien Thierry.

  A few other patches to improve various areas, and removal of some
  obsolete mcount bits and a redundant kbuild conditional"

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8802/1: Call syscall_trace_exit even when system call skipped
  ARM: 8797/1: spectre-v1.1: harden __copy_to_user
  ARM: 8796/1: spectre-v1,v1.1: provide helpers for address sanitization
  ARM: 8795/1: spectre-v1.1: use put_user() for __put_user()
  ARM: 8794/1: uaccess: Prevent speculative use of the current addr_limit
  ARM: 8793/1: signal: replace __put_user_error with __put_user
  ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()
  ARM: 8791/1: vfp: use __copy_to_user() when saving VFP state
  ARM: 8790/1: signal: always use __copy_to_user to save iwmmxt context
  ARM: 8789/1: signal: copy registers using __copy_to_user()
  ARM: 8801/1: makefile: use ARMv3M mode for RiscPC
  ARM: 8800/1: use choice for kernel unwinders
  ARM: 8798/1: remove unnecessary KBUILD_SRC ifeq conditional
  ARM: 8788/1: ftrace: remove old mcount support
  ARM: 8786/1: Debug kernel copy by printing

Pull x86 vdso updates from Ingo Molnar:
 "Two main changes:

   - Cleanups, simplifications and CLOCK_TAI support (Thomas Gleixner)

   - Improve code generation (Andy Lutomirski)"

* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/vdso: Rearrange do_hres() to improve code generation
  x86/vdso: Document vgtod_ts better
  x86/vdso: Remove "memory" clobbers in the vDSO syscall fallbacks
  x66/vdso: Add CLOCK_TAI support
  x86/vdso: Move cycle_last handling into the caller
  x86/vdso: Simplify the invalid vclock case
  x86/vdso: Replace the clockid switch case
  x86/vdso: Collapse coarse functions
  x86/vdso: Collapse high resolution functions
  x86/vdso: Introduce and use vgtod_ts
  x86/vdso: Use unsigned int consistently for vsyscall_gtod_data:: Seq
  x86/vdso: Enforce 64bit clocksource
  x86/time: Implement clocksource_arch_init()
  clocksource: Provide clocksource_arch_init()

Pull x86 pti updates from Ingo Molnar:
 "The main changes:

   - Make the IBPB barrier more strict and add STIBP support (Jiri
     Kosina)

   - Micro-optimize and clean up the entry code (Andy Lutomirski)

   - ... plus misc other fixes"

* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/speculation: Propagate information about RSB filling mitigation to sysfs
  x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation
  x86/speculation: Apply IBPB more strictly to avoid cross-process data leak
  x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant
  x86/CPU: Fix unused variable warning when !CONFIG_IA32_EMULATION
  x86/pti/64: Remove the SYSCALL64 entry trampoline
  x86/entry/64: Use the TSS sp2 slot for SYSCALL/SYSRET scratch space
  x86/entry/64: Document idtentry

Pull x86 platform updates from Ingo Molnar:
 "Two minor OLPC changes: a build fix and a new quirk"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/olpc: Fix build error with CONFIG_MFD_CS5535=m
  x86/olpc: Indicate that legacy PC XO-1 platform should not register RTC

Pull x86 paravirt updates from Ingo Molnar:
 "Two main changes:

   - Remove no longer used parts of the paravirt infrastructure and put
     large quantities of paravirt ops under a new config option
     PARAVIRT_XXL=y, which is selected by XEN_PV only. (Joergen Gross)

   - Enable PV spinlocks on Hyperv (Yi Sun)"

* 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Enable PV qspinlock for Hyper-V
  x86/hyperv: Add GUEST_IDLE_MSR support
  x86/paravirt: Clean up native_patch()
  x86/paravirt: Prevent redefinition of SAVE_FLAGS macro
  x86/xen: Make xen_reservation_lock static
  x86/paravirt: Remove unneeded mmu related paravirt ops bits
  x86/paravirt: Move the Xen-only pv_mmu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella
  x86/paravirt: Move items in pv_info under PARAVIRT_XXL umbrella
  x86/paravirt: Introduce new config option PARAVIRT_XXL
  x86/paravirt: Remove unused paravirt bits
  x86/paravirt: Use a single ops structure
  x86/paravirt: Remove clobbers from struct paravirt_patch_site
  x86/paravirt: Remove clobbers parameter from paravirt patch functions
  x86/paravirt: Make paravirt_patch_call() and paravirt_patch_jmp() static
  x86/xen: Add SPDX identifier in arch/x86/xen files
  x86/xen: Link platform-pci-unplug.o only if CONFIG_XEN_PVHVM
  x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c
  x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella

Pull x86 mm updates from Ingo Molnar:
 "Lots of changes in this cycle:

   - Lots of CPA (change page attribute) optimizations and related
     cleanups (Thomas Gleixner, Peter Zijstra)

   - Make lazy TLB mode even lazier (Rik van Riel)

   - Fault handler cleanups and improvements (Dave Hansen)

   - kdump, vmcore: Enable kdumping encrypted memory with AMD SME
     enabled (Lianbo Jiang)

   - Clean up VM layout documentation (Baoquan He, Ingo Molnar)

   - ... plus misc other fixes and enhancements"

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
  x86/stackprotector: Remove the call to boot_init_stack_canary() from cpu_startup_entry()
  x86/mm: Kill stray kernel fault handling comment
  x86/mm: Do not warn about PCI BIOS W+X mappings
  resource: Clean it up a bit
  resource: Fix find_next_iomem_res() iteration issue
  resource: Include resource end in walk_*() interfaces
  x86/kexec: Correct KEXEC_BACKUP_SRC_END off-by-one error
  x86/mm: Remove spurious fault pkey check
  x86/mm/vsyscall: Consider vsyscall page part of user address space
  x86/mm: Add vsyscall address helper
  x86/mm: Fix exception table comments
  x86/mm: Add clarifying comments for user addr space
  x86/mm: Break out user address space handling
  x86/mm: Break out kernel address space handling
  x86/mm: Clarify hardware vs. software "error_code"
  x86/mm/tlb: Make lazy TLB mode lazier
  x86/mm/tlb: Add freed_tables element to flush_tlb_info
  x86/mm/tlb: Add freed_tables argument to flush_tlb_mm_range
  smp,cpumask: introduce on_each_cpu_cond_mask
  smp: use __cpumask_set_cpu in on_each_cpu_cond
  ...

Pull x86 hyperv updates from Ingo Molnar:
 "Two small changes: a boot warning removal and a minor cleanup"

* 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyperv: Remove unused include
  x86/hyperv: Suppress "PCI: Fatal: No config space access function found"

Pull x86 grub2 updates from Ingo Molnar:
 "This extends the x86 boot protocol to include an address for the RSDP
  table - utilized by Xen currently.

  Matching Grub2 patches are pending as well. (Juergen Gross)"

* 'x86-grub2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/acpi, x86/boot: Take RSDP address for boot params if available
  x86/boot: Add ACPI RSDP address to setup_header
  x86/xen: Fix boot loader version reported for PVH guests

Pull x86 cpu updates from Ingo Molnar:
 "The main changes in this cycle were:

   - Add support for the "Dhyana" x86 CPUs by Hygon: these are licensed
     based on the AMD Zen architecture, and are built and sold in China,
     for domestic datacenter use. The code is pretty close to AMD
     support, mostly with a few quirks and enumeration differences. (Pu
     Wen)

   - Enable CPUID support on Cyrix 6x86/6x86L processors"

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tools/cpupower: Add Hygon Dhyana support
  cpufreq: Add Hygon Dhyana support
  ACPI: Add Hygon Dhyana support
  x86/xen: Add Hygon Dhyana support to Xen
  x86/kvm: Add Hygon Dhyana support to KVM
  x86/mce: Add Hygon Dhyana support to the MCA infrastructure
  x86/bugs: Add Hygon Dhyana to the respective mitigation machinery
  x86/apic: Add Hygon Dhyana support
  x86/pci, x86/amd_nb: Add Hygon Dhyana support to PCI and northbridge
  x86/amd_nb: Check vendor in AMD-only functions
  x86/alternative: Init ideal_nops for Hygon Dhyana
  x86/events: Add Hygon Dhyana support to PMU infrastructure
  x86/smpboot: Do not use BSP INIT delay and MWAIT to idle on Dhyana
  x86/cpu/mtrr: Support TOP_MEM2 and get MTRR number
  x86/cpu: Get cache info and setup cache cpumap for Hygon Dhyana
  x86/cpu: Create Hygon Dhyana architecture support file
  x86/CPU: Change query logic so CPUID is enabled before testing
  x86/CPU: Use correct macros for Cyrix calls

Pull x86 build update from Ingo Molnar:
 "A small cleanup to x86 Kconfigs"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kconfig: Remove redundant 'default n' lines from all x86 Kconfig's

Pull x86 boot updates from Ingo Molnar:
 "Two cleanups and a bugfix for a rare boot option combination"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot/KASLR: Remove return value from handle_mem_options()
  x86/corruption-check: Use pr_*() instead of printk()
  x86/corruption-check: Fix panic in memory_corruption_check() when boot option without value is provided

Pull x86 asm updates from Ingo Molnar:
 "The main changes in this cycle were the fsgsbase related preparatory
  patches from Chang S. Bae - but there's also an optimized
  memcpy_flushcache() and a cleanup for the __cmpxchg_double() assembly
  glue"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fsgsbase/64: Clean up various details
  x86/segments: Introduce the 'CPUNODE' naming to better document the segment limit CPU/node NR trick
  x86/vdso: Initialize the CPU/node NR segment descriptor earlier
  x86/vdso: Introduce helper functions for CPU and node number
  x86/segments/64: Rename the GDT PER_CPU entry to CPU_NUMBER
  x86/fsgsbase/64: Factor out FS/GS segment loading from __switch_to()
  x86/fsgsbase/64: Convert the ELF core dump code to the new FSGSBASE helpers
  x86/fsgsbase/64: Make ptrace use the new FS/GS base helpers
  x86/fsgsbase/64: Introduce FS/GS base helper functions
  x86/fsgsbase/64: Fix ptrace() to read the FS/GS base accurately
  x86/asm: Use CC_SET()/CC_OUT() in __cmpxchg_double()
  x86/asm: Optimize memcpy_flushcache()

Pull x86 apic updates from Ingo Molnar:
 "Improve the spreading of managed IRQs at allocation time"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irq/matrix: Spread managed interrupts on allocation
  irq/matrix: Split out the CPU selection code into a helper

Pull scheduler updates from Ingo Molnar:
 "The main changes are:

   - Migrate CPU-intense 'misfit' tasks on asymmetric capacity systems,
     to better utilize (much) faster 'big core' CPUs. (Morten Rasmussen,
     Valentin Schneider)

   - Topology handling improvements, in particular when CPU capacity
     changes and related load-balancing fixes/improvements (Morten
     Rasmussen)

   - ... plus misc other improvements, fixes and updates"

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (28 commits)
  sched/completions/Documentation: Add recommendation for dynamic and ONSTACK completions
  sched/completions/Documentation: Clean up the document some more
  sched/completions/Documentation: Fix a couple of punctuation nits
  cpu/SMT: State SMT is disabled even with nosmt and without "=force"
  sched/core: Fix comment regarding nr_iowait_cpu() and get_iowait_load()
  sched/fair: Remove setting task's se->runnable_weight during PELT update
  sched/fair: Disable LB_BIAS by default
  sched/pelt: Fix warning and clean up IRQ PELT config
  sched/topology: Make local variables static
  sched/debug: Use symbolic names for task state constants
  sched/numa: Remove unused numa_stats::nr_running field
  sched/numa: Remove unused code from update_numa_stats()
  sched/debug: Explicitly cast sched_feat() to bool
  sched/core: Disable SD_PREFER_SIBLING on asymmetric CPU capacity domains
  sched/fair: Don't move tasks to lower capacity CPUs unless necessary
  sched/fair: Set rq->rd->overload when misfit
  sched/fair: Wrap rq->rd->overload accesses with READ/WRITE_ONCE()
  sched/core: Change root_domain->overload type to int
  sched/fair: Change 'prefer_sibling' type to bool
  sched/fair: Kick nohz balance if rq->misfit_task_load
  ...

Pull RAS updates from Ingo Molnar:
 "Misc smaller fixes and cleanups"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mcelog: Remove one mce_helper definition
  x86/mce: Add macros for the corrected error count bit field
  x86/mce: Use BIT_ULL(x) for bit mask definitions
  x86/mce-inject: Reset injection struct after injection

Pull perf updates from Ingo Molnar:
 "The main updates in this cycle were:

   - Lots of perf tooling changes too voluminous to list (big perf trace
     and perf stat improvements, lots of libtraceevent reorganization,
     etc.), so I'll list the authors and refer to the changelog for
     details:

       Benjamin Peterson, Jérémie Galarneau, Kim Phillips, Peter
       Zijlstra, Ravi Bangoria, Sangwon Hong, Sean V Kelley, Steven
       Rostedt, Thomas Gleixner, Ding Xiang, Eduardo Habkost, Thomas
       Richter, Andi Kleen, Sanskriti Sharma, Adrian Hunter, Tzvetomir
       Stoyanov, Arnaldo Carvalho de Melo, Jiri Olsa.

     ... with the bulk of the changes written by Jiri Olsa, Tzvetomir
     Stoyanov and Arnaldo Carvalho de Melo.

   - Continued intel_rdt work with a focus on playing well with perf
     events. This also imported some non-perf RDT work due to
     dependencies. (Reinette Chatre)

   - Implement counter freezing for Arch Perfmon v4 (Skylake and newer).
     This allows to speed up the PMI handler by avoiding unnecessary MSR
     writes and make it more accurate. (Andi Kleen)

   - kprobes cleanups and simplification (Masami Hiramatsu)

   - Intel Goldmont PMU updates (Kan Liang)

   - ... plus misc other fixes and updates"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (155 commits)
  kprobes/x86: Use preempt_enable() in optimized_callback()
  x86/intel_rdt: Prevent pseudo-locking from using stale pointers
  kprobes, x86/ptrace.h: Make regs_get_kernel_stack_nth() not fault on bad stack
  perf/x86/intel: Export mem events only if there's PEBS support
  x86/cpu: Drop pointless static qualifier in punit_dev_state_show()
  x86/intel_rdt: Fix initial allocation to consider CDP
  x86/intel_rdt: CBM overlap should also check for overlap with CDP peer
  x86/intel_rdt: Introduce utility to obtain CDP peer
  tools lib traceevent, perf tools: Move struct tep_handler definition in a local header file
  tools lib traceevent: Separate out tep_strerror() for strerror_r() issues
  perf python: More portable way to make CFLAGS work with clang
  perf python: Make clang_has_option() work on Python 3
  perf tools: Free temporary 'sys' string in read_event_files()
  perf tools: Avoid double free in read_event_file()
  perf tools: Free 'printk' string in parse_ftrace_printk()
  perf tools: Cleanup trace-event-info 'tdata' leak
  perf strbuf: Match va_{add,copy} with va_end
  perf test: S390 does not support watchpoints in test 22
  perf auxtrace: Include missing asm/bitsperlong.h to get BITS_PER_LONG
  tools include: Adopt linux/bits.h
  ...

Pull locking and misc x86 updates from Ingo Molnar:
 "Lots of changes in this cycle - in part because locking/core attracted
  a number of related x86 low level work which was easier to handle in a
  single tree:

   - Linux Kernel Memory Consistency Model updates (Alan Stern, Paul E.
     McKenney, Andrea Parri)

   - lockdep scalability improvements and micro-optimizations (Waiman
     Long)

   - rwsem improvements (Waiman Long)

   - spinlock micro-optimization (Matthew Wilcox)

   - qspinlocks: Provide a liveness guarantee (more fairness) on x86.
     (Peter Zijlstra)

   - Add support for relative references in jump tables on arm64, x86
     and s390 to optimize jump labels (Ard Biesheuvel, Heiko Carstens)

   - Be a lot less permissive on weird (kernel address) uaccess faults
     on x86: BUG() when uaccess helpers fault on kernel addresses (Jann
     Horn)

   - macrofy x86 asm statements to un-confuse the GCC inliner. (Nadav
     Amit)

   - ... and a handful of other smaller changes as well"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (57 commits)
  locking/lockdep: Make global debug_locks* variables read-mostly
  locking/lockdep: Fix debug_locks off performance problem
  locking/pvqspinlock: Extend node size when pvqspinlock is configured
  locking/qspinlock_stat: Count instances of nested lock slowpaths
  locking/qspinlock, x86: Provide liveness guarantee
  x86/asm: 'Simplify' GEN_*_RMWcc() macros
  locking/qspinlock: Rework some comments
  locking/qspinlock: Re-order code
  locking/lockdep: Remove duplicated 'lock_class_ops' percpu array
  x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y
  futex: Replace spin_is_locked() with lockdep
  locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y
  x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs
  x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs
  x86/extable: Macrofy inline assembly code to work around GCC inlining bugs
  x86/paravirt: Work around GCC inlining bugs when compiling paravirt ops
  x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs
  x86/alternatives: Macrofy lock prefixes to work around GCC inlining bugs
  x86/refcount: Work around GCC inlining bug
  x86/objtool: Use asm macros to work around GCC inlining bugs
  ...

Pull EFI updates from Ingo Molnar:
 "The main changes are:

   - Add support for enlisting the help of the EFI firmware to create
     memory reservations that persist across kexec.

   - Add page fault handling to the runtime services support code on x86
     so we can more gracefully recover from buggy EFI firmware.

   - Fix command line handling on x86 for the boot path that omits the
     stub's PE/COFF entry point.

   - Other assorted fixes and updates"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: boot: Fix EFI stub alignment
  efi/x86: Call efi_parse_options() from efi_main()
  efi/x86: earlyprintk - Add 64bit efi fb address support
  efi/x86: drop task_lock() from efi_switch_mm()
  efi/x86: Handle page faults occurring while running EFI runtime services
  efi: Make efi_rts_work accessible to efi page fault handler
  efi/efi_test: add exporting ResetSystem runtime service
  efi/libstub: arm: support building with clang
  efi: add API to reserve memory persistently across kexec reboot
  efi/arm: libstub: add a root memreserve config table
  efi: honour memory reservations passed via a linux specific config table

Pull RCU updates from Ingo Molnar:
 "The biggest change in this cycle is the conclusion of the big
  'simplify RCU to two primary flavors' consolidation work - i.e.
  there's a single RCU flavor for any kernel variant (PREEMPT and
  !PREEMPT):

    - Consolidate the RCU-bh, RCU-preempt, and RCU-sched flavors into a
      single flavor similar to RCU-sched in !PREEMPT kernels and into a
      single flavor similar to RCU-preempt (but also waiting on
      preempt-disabled sequences of code) in PREEMPT kernels.

      This branch also includes a refactoring of
      rcu_{nmi,irq}_{enter,exit}() from Byungchul Park.

    - Now that there is only one RCU flavor in any given running kernel,
      the many "rsp" pointers are no longer required, and this cleanup
      series removes them.

    - This branch carries out additional cleanups made possible by the
      RCU flavor consolidation, including inlining now-trivial
      functions, updating comments and definitions, and removing
      now-unneeded rcutorture scenarios.

    - Now that there is only one flavor of RCU in any running kernel,
      there is also only on rcu_data structure per CPU. This means that
      the rcu_dynticks structure can be merged into the rcu_data
      structure, a task taken on by this branch. This branch also
      contains a -rt-related fix from Mike Galbraith.

  There were also other updates:

    - Documentation updates, including some good-eye catches from Joel
      Fernandes.

    - SRCU updates, most notably changes enabling call_srcu() to be
      invoked very early in the boot sequence.

    - Torture-test updates, including some preliminary work towards
      making rcutorture better able to find problems that result in
      insufficient grace-period forward progress.

    - Initial changes to RCU to better promote forward progress of grace
      periods, including fixing a bug found by Marius Hillenbrand and
      David Woodhouse, with the fix suggested by Peter Zijlstra"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (140 commits)
  srcu: Make early-boot call_srcu() reuse workqueue lists
  rcutorture: Test early boot call_srcu()
  srcu: Make call_srcu() available during very early boot
  rcu: Convert rcu_state.ofl_lock to raw_spinlock_t
  rcu: Remove obsolete ->dynticks_fqs and ->cond_resched_completed
  rcu: Switch ->dynticks to rcu_data structure, remove rcu_dynticks
  rcu: Switch dyntick nesting counters to rcu_data structure
  rcu: Switch urgent quiescent-state requests to rcu_data structure
  rcu: Switch lazy counts to rcu_data structure
  rcu: Switch last accelerate/advance to rcu_data structure
  rcu: Switch ->tick_nohz_enabled_snap to rcu_data structure
  rcu: Merge rcu_dynticks structure into rcu_data structure
  rcu: Remove unused rcu_dynticks_snap() from Tiny RCU
  rcu: Convert "1UL << x" to "BIT(x)"
  rcu: Avoid resched_cpu() when rescheduling the current CPU
  rcu: More aggressively enlist scheduler aid for nohz_full CPUs
  rcu: Compute jiffies_till_sched_qs from other kernel parameters
  rcu: Provide functions for determining if call_rcu() has been invoked
  rcu: Eliminate ->rcu_qs_ctr from the rcu_dynticks structure
  rcu: Motivate Tiny RCU forward progress
  ...

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Pull s390 updates from Martin Schwidefsky:

 - Improved access control for the zcrypt driver, multiple device nodes
   can now be created with different access control lists

 - Extend the pkey API to provide random protected keys, this is useful
   for encrypted swap device with ephemeral protected keys

 - Add support for virtually mapped kernel stacks

 - Rework the early boot code, this moves the memory detection into the
   boot code that runs prior to decompression.

 - Add KASAN support

 - Bug fixes and cleanups

* tag 's390-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (83 commits)
  s390/pkey: move pckmo subfunction available checks away from module init
  s390/kasan: support preemptible kernel build
  s390/pkey: Load pkey kernel module automatically
  s390/perf: Return error when debug_register fails
  s390/sthyi: Fix machine name validity indication
  s390/zcrypt: fix broken zcrypt_send_cprb in-kernel api function
  s390/vmalloc: fix VMALLOC_START calculation
  s390/mem_detect: add missing include
  s390/dumpstack: print psw mask and address again
  s390/crypto: Enhance paes cipher to accept variable length key material
  s390/pkey: Introduce new API for transforming key blobs
  s390/pkey: Introduce new API for random protected key verification
  s390/pkey: Add sysfs attributes to emit secure key blobs
  s390/pkey: Add sysfs attributes to emit protected key blobs
  s390/pkey: Define protected key blob format
  s390/pkey: Introduce new API for random protected key generation
  s390/zcrypt: add ap_adapter_mask sysfs attribute
  s390/zcrypt: provide apfs failure code on type 86 error reply
  s390/zcrypt: zcrypt device driver cleanup
  s390/kasan: add support for mem= kernel parameter
  ...

Pull ia64 updates from Tony Luck:
 "Miscellaneous ia64 fixes from Christoph"

* tag 'please-pull-next' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
  intel-iommu: mark intel_dma_ops static
  ia64: remove machvec_dma_sync_{single,sg}
  ia64/sn2: remove no-ops dma sync methods
  ia64: remove the unused iommu_dma_init function
  ia64: remove the unused pci_iommu_shutdown function
  ia64: remove the unused bad_dma_address symbol
  ia64: remove iommu_dma_supported
  ia64: remove the dead iommu_sac_force variable
  ia64: remove the kern_mem_attribute export