[GIT PULL] locking changes for v5.7

From: Ingo Molnar
Date: Mon Mar 30 2020 - 11:18:48 EST

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Linus,

Please pull the latest locking-core-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git locking-core-for-linus

# HEAD: f1e67e355c2aafeddf1eac31335709236996d2fe fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t

The main changes in this cycle were:

- Continued user-access cleanups in the futex code.

- percpu-rwsem rewrite that uses its own waitqueue and atomic_t instead
of an embedded rwsem. This addresses a couple of weaknesses, but the
primary motivation was complications on the -rt kernel.

- Introduce raw lock nesting detection on lockdep
(CONFIG_PROVE_RAW_LOCK_NESTING=y), document the raw_lock vs. normal
lock differences. This too originates from -rt.

- Reuse lockdep zapped chain_hlocks entries, to conserve RAM footprint
on distro-ish kernels running into the "BUG: MAX_LOCKDEP_CHAIN_HLOCKS
too low!" depletion of the lockdep chain-entries pool.

- Misc cleanups, smaller fixes and enhancements - see the changelog for
details.

Thanks,

Ingo

------------------>
Al Viro (8):
futex: arch_futex_atomic_op_inuser() calling conventions change
sh: no need of access_ok() in arch_futex_atomic_op_inuser()
[parisc, s390, sparc64] no need for access_ok() in futex handling
objtool: whitelist __sanitizer_cov_trace_switch()
x86: convert arch_futex_atomic_op_inuser() to user_access_begin/user_access_end()
x86: don't reload after cmpxchg in unsafe_atomic_op2() loop
generic arch_futex_atomic_op_inuser() doesn't need access_ok()
x86: get rid of user_atomic_cmpxchg_inatomic()

Boqun Feng (1):
locking/lockdep: Avoid recursion in lockdep_count_{for,back}ward_deps()

Clark Williams (1):
thermal/x86_pkg_temp: Make pkg_temp_lock a raw_spinlock_t

Davidlohr Bueso (2):
locking/percpu-rwsem: Fold __percpu_up_read()
locking/percpu-rwsem: Add might_sleep() for writer locking

Logan Gunthorpe (1):
PCI/switchtec: Fix init_completion race condition with poll_wait()

Peter Zijlstra (13):
locking/percpu-rwsem, lockdep: Make percpu-rwsem use its own lockdep_map
locking/percpu-rwsem: Convert to bool
locking/percpu-rwsem: Move __this_cpu_inc() into the slowpath
locking/percpu-rwsem: Extract __percpu_down_read_trylock()
locking/percpu-rwsem: Remove the embedded rwsem
locking/rwsem: Remove RWSEM_OWNER_UNKNOWN
futex: Remove pointless mmgrap() + mmdrop()
futex: Remove {get,drop}_futex_key_refs()
locking/lockdep: Fix bad recursion pattern
locking/lockdep: Rework lockdep_lock
lockdep: Teach lockdep about "USED" <- "IN-NMI" inversions
acpi: Remove header dependency
lockdep: Introduce wait-type checks

Peter Zijlstra (Intel) (2):
rcuwait: Add @state argument to rcuwait_wait_event()
powerpc/ps3: Convert half completion to rcuwait

Randy Dunlap (1):
Documentation/locking/locktypes: Minor copy editor fixes

Sebastian Andrzej Siewior (9):
pci/switchtec: Replace completion wait queue usage for poll
nds32: Remove mm.h from asm/uaccess.h
csky: Remove mm.h from asm/uaccess.h
hexagon: Remove mm.h from asm/uaccess.h
ia64: Remove mm.h from asm/uaccess.h
microblaze: Remove mm.h from asm/uaccess.h
lockdep: Add hrtimer context tracing bits
lockdep: Annotate irq_work
lockdep: Add posixtimer context tracing bits

Sebastian Siewior (1):
completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()

Thomas Gleixner (9):
usb: gadget: Use completion interface instead of open coding it
orinoco_usb: Use the regular completion interfaces
Documentation: Add lock ordering and nesting documentation
timekeeping: Split jiffies seqlock
sched/swait: Prepare usage in completions
completion: Use simple wait queues
m68knommu: Remove mm.h include from uaccess_no.h
Documentation/locking/locktypes: Further clarifications and wordsmithing
fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t

Waiman Long (6):
locking/lockdep: Decrement IRQ context counters when removing lock chain
locking/lockdep: Display irq_context names in /proc/lockdep_chains
locking/lockdep: Track number of zapped classes
locking/lockdep: Throw away all lock chains with zapped class
locking/lockdep: Track number of zapped lock chains
locking/lockdep: Reuse freed chain_hlocks entries

Will Deacon (1):
asm-generic/bitops: Update stale comment

Documentation/locking/index.rst | 1 +
Documentation/locking/locktypes.rst | 347 +++++++++++
arch/alpha/include/asm/futex.h | 5 +-
arch/arc/include/asm/futex.h | 5 +-
arch/arm/include/asm/futex.h | 5 +-
arch/arm64/include/asm/futex.h | 5 +-
arch/csky/include/asm/uaccess.h | 1 -
arch/hexagon/include/asm/futex.h | 5 +-
arch/hexagon/include/asm/uaccess.h | 1 -
arch/ia64/include/asm/futex.h | 5 +-
arch/ia64/include/asm/uaccess.h | 1 -
arch/ia64/kernel/process.c | 1 +
arch/ia64/mm/ioremap.c | 1 +
arch/m68k/include/asm/uaccess_no.h | 1 -
arch/microblaze/include/asm/futex.h | 5 +-
arch/microblaze/include/asm/uaccess.h | 1 -
arch/mips/include/asm/futex.h | 5 +-
arch/nds32/include/asm/futex.h | 6 +-
arch/nds32/include/asm/uaccess.h | 1 -
arch/openrisc/include/asm/futex.h | 5 +-
arch/parisc/include/asm/futex.h | 2 -
arch/powerpc/include/asm/futex.h | 5 +-
arch/powerpc/platforms/ps3/device-init.c | 18 +-
arch/riscv/include/asm/futex.h | 5 +-
arch/s390/include/asm/futex.h | 2 -
arch/sh/include/asm/futex.h | 4 -
arch/sparc/include/asm/futex_64.h | 4 -
arch/x86/include/asm/futex.h | 99 +--
arch/x86/include/asm/uaccess.h | 93 ---
arch/xtensa/include/asm/futex.h | 5 +-
.../net/wireless/intersil/orinoco/orinoco_usb.c | 21 +-
drivers/pci/switch/switchtec.c | 22 +-
drivers/platform/x86/dell-smo8800.c | 1 +
drivers/platform/x86/wmi.c | 1 +
.../intel/int340x_thermal/acpi_thermal_rel.c | 1 +
drivers/thermal/intel/x86_pkg_temp_thermal.c | 24 +-
drivers/usb/gadget/function/f_fs.c | 2 +-
drivers/usb/gadget/legacy/inode.c | 4 +-
fs/buffer.c | 19 +-
fs/ext4/page-io.c | 8 +-
fs/ntfs/aops.c | 9 +-
include/acpi/acpi_bus.h | 2 +-
include/asm-generic/bitops.h | 5 +-
include/asm-generic/futex.h | 2 -
include/linux/buffer_head.h | 6 +-
include/linux/completion.h | 8 +-
include/linux/irq_work.h | 2 +
include/linux/irqflags.h | 48 +-
include/linux/lockdep.h | 86 ++-
include/linux/mutex.h | 7 +-
include/linux/percpu-rwsem.h | 83 +--
include/linux/rcuwait.h | 12 +-
include/linux/rwlock_types.h | 6 +-
include/linux/rwsem.h | 12 +-
include/linux/sched.h | 2 +
include/linux/spinlock.h | 35 +-
include/linux/spinlock_types.h | 24 +-
include/linux/wait.h | 1 +
kernel/cpu.c | 4 +-
kernel/exit.c | 1 +
kernel/futex.c | 107 +---
kernel/irq/handle.c | 7 +
kernel/irq_work.c | 2 +
kernel/locking/lockdep.c | 674 +++++++++++++++++----
kernel/locking/lockdep_internals.h | 14 +-
kernel/locking/lockdep_proc.c | 31 +-
kernel/locking/mutex-debug.c | 2 +-
kernel/locking/percpu-rwsem.c | 194 ++++--
kernel/locking/rwsem.c | 9 +-
kernel/locking/rwsem.h | 10 -
kernel/locking/spinlock_debug.c | 6 +-
kernel/rcu/tree.c | 1 +
kernel/rcu/update.c | 24 +-
kernel/sched/completion.c | 36 +-
kernel/sched/sched.h | 3 +
kernel/sched/swait.c | 15 +-
kernel/time/hrtimer.c | 6 +-
kernel/time/jiffies.c | 7 +-
kernel/time/posix-cpu-timers.c | 6 +-
kernel/time/tick-common.c | 10 +-
kernel/time/tick-sched.c | 20 +-
kernel/time/timekeeping.c | 6 +-
kernel/time/timekeeping.h | 3 +-
lib/Kconfig.debug | 17 +
tools/objtool/check.c | 1 +
85 files changed, 1611 insertions(+), 702 deletions(-)
create mode 100644 Documentation/locking/locktypes.rst

Next message: Jason Baron: "Re: [RFC PATCH V2] dynamic_debug: Add config option of DYNAMIC_DEBUG_CORE"
Previous message: Stefan Berger: "[PATCH v2 2/3] tpm: Rearrange ACPI log code to easier extend for TPM2 case"
Next in thread: pr-tracker-bot: "Re: [GIT PULL] locking changes for v5.7"
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