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Date: Tue, 23 Oct 2018 12:26:07 +0200 From: Ingo Molnar <mingo@...nel.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: linux-kernel@...r.kernel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Thomas Gleixner <tglx@...utronix.de>, "Paul E. McKenney" <paulmck@...ibm.com>, Andrew Morton <akpm@...ux-foundation.org>, Borislav Petkov <bp@...en8.de> Subject: [GIT PULL] locking and misc x86 updates for v4.20 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: 01a14bda11add9dcd4a59200f13834d634559935 locking/lockdep: Make global debug_locks* variables read-mostly 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. Thanks, Ingo ------------------> Adam Borowski (1): x86/defconfig: Enable CONFIG_USB_XHCI_HCD=y Alan Stern (1): tools/memory-model: Add extra ordering for locks and remove it for ordinary release/acquire Andrea Parri (1): locking/memory-barriers: Replace smp_cond_acquire() with smp_cond_load_acquire() Andrew Murray (1): Documentation/lockstat: Fix trivial typo Ard Biesheuvel (10): jump_label: Abstract jump_entry member accessors jump_label: Implement generic support for relative references arm64/kernel: jump_label: Switch to relative references x86: Add support for 64-bit place relative relocations x86/jump_label: Switch to jump_entry accessors x86/jump_table: Use relative references jump_label: Annotate entries that operate on __init code earlier jump_table: Move entries into ro_after_init region s390/vmlinux.lds: Move JUMP_TABLE_DATA into output section jump_label: Fix NULL dereference bug in __jump_label_mod_update() Borislav Petkov (1): jump_label: Use static_key_linked() accessor Heiko Carstens (1): s390/jump_label: Switch to relative references Jann Horn (7): x86/kprobes: Refactor kprobes_fault() like kprobe_exceptions_notify() x86/kprobes: Inline kprobe_exceptions_notify() into do_general_protection() x86/kprobes: Stop calling fixup_exception() from kprobe_fault_handler() x86/extable: Introduce _ASM_EXTABLE_UA for uaccess fixups x86/fault: Plumb error code and fault address through to fault handlers x86/fault: BUG() when uaccess helpers fault on kernel addresses lkdtm: Test copy_to_user() on bad kernel pointer under KERNEL_DS Lance Roy (1): futex: Replace spin_is_locked() with lockdep Masahiro Yamada (1): x86/build: Remove unused CONFIG_AS_CRC32 Matthew Wilcox (1): locking/spinlocks: Remove an instruction from spin and write locks Nadav Amit (10): kbuild/arch/xtensa: Define LINKER_SCRIPT for the linker script kbuild/Makefile: Prepare for using macros in inline assembly code to work around asm() related GCC inlining bugs x86/objtool: Use asm macros to work around GCC inlining bugs x86/refcount: Work around GCC inlining bug x86/alternatives: Macrofy lock prefixes to work around GCC inlining bugs x86/bug: Macrofy the BUG table section handling, to work around GCC inlining bugs x86/paravirt: Work around GCC inlining bugs when compiling paravirt ops x86/extable: Macrofy inline assembly code to work around GCC inlining bugs x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs Paul E. McKenney (2): tools/memory-model: Add litmus-test naming scheme tools/memory-model: Add more LKMM limitations Peter Zijlstra (6): jump_label/lockdep: Assert we hold the hotplug lock for _cpuslocked() operations locking/lockdep, cpu/hotplug: Annotate AP thread locking/qspinlock: Re-order code locking/qspinlock: Rework some comments x86/asm: 'Simplify' GEN_*_RMWcc() macros locking/qspinlock, x86: Provide liveness guarantee SeongJae Park (1): tools/memory-model: Fix a README typo Steven Rostedt (VMware) (1): locking/rtmutex: Fix the preprocessor logic with normal #ifdef #else #endif Waiman Long (11): locking/rwsem: Exit read lock slowpath if queue empty & no writer locking/rwsem: Make owner store task pointer of last owning reader locking/lockdep: Remove add_chain_cache_classes() locking/lockdep: Eliminate redundant IRQs check in __lock_acquire() locking/lockdep: Add a faster path in __lock_release() locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y locking/lockdep: Remove duplicated 'lock_class_ops' percpu array locking/qspinlock_stat: Count instances of nested lock slowpaths locking/pvqspinlock: Extend node size when pvqspinlock is configured locking/lockdep: Fix debug_locks off performance problem locking/lockdep: Make global debug_locks* variables read-mostly Documentation/locking/lockstat.txt | 2 +- Documentation/memory-barriers.txt | 3 +- Makefile | 9 +- arch/Kconfig | 3 + arch/arm64/Kconfig | 1 + arch/arm64/include/asm/jump_label.h | 38 ++--- arch/arm64/kernel/jump_label.c | 6 +- arch/s390/Kconfig | 1 + arch/s390/include/asm/jump_label.h | 40 ++--- arch/s390/kernel/jump_label.c | 11 +- arch/s390/kernel/vmlinux.lds.S | 1 + arch/x86/Kconfig | 1 + arch/x86/Makefile | 8 +- arch/x86/configs/i386_defconfig | 1 + arch/x86/configs/x86_64_defconfig | 1 + arch/x86/entry/calling.h | 2 +- arch/x86/include/asm/alternative-asm.h | 20 ++- arch/x86/include/asm/alternative.h | 11 +- arch/x86/include/asm/asm.h | 57 +++---- arch/x86/include/asm/atomic.h | 8 +- arch/x86/include/asm/atomic64_64.h | 8 +- arch/x86/include/asm/bitops.h | 9 +- arch/x86/include/asm/bug.h | 98 ++++++----- arch/x86/include/asm/cpufeature.h | 82 +++++---- arch/x86/include/asm/elf.h | 3 +- arch/x86/include/asm/extable.h | 3 +- arch/x86/include/asm/fpu/internal.h | 2 +- arch/x86/include/asm/futex.h | 6 +- arch/x86/include/asm/jump_label.h | 80 ++------- arch/x86/include/asm/local.h | 8 +- arch/x86/include/asm/paravirt_types.h | 56 +++---- arch/x86/include/asm/preempt.h | 2 +- arch/x86/include/asm/ptrace.h | 2 + arch/x86/include/asm/qspinlock.h | 15 ++ arch/x86/include/asm/refcount.h | 79 +++++---- arch/x86/include/asm/rmwcc.h | 69 ++++---- arch/x86/include/asm/uaccess.h | 22 +-- arch/x86/kernel/cpu/mcheck/mce.c | 2 +- arch/x86/kernel/jump_label.c | 62 +++---- arch/x86/kernel/kprobes/core.c | 38 ----- arch/x86/kernel/macros.S | 16 ++ arch/x86/kernel/module.c | 6 + arch/x86/kernel/traps.c | 16 +- arch/x86/lib/checksum_32.S | 4 +- arch/x86/lib/copy_user_64.S | 90 +++++----- arch/x86/lib/csum-copy_64.S | 8 +- arch/x86/lib/getuser.S | 12 +- arch/x86/lib/putuser.S | 10 +- arch/x86/lib/usercopy_32.c | 126 +++++++------- arch/x86/lib/usercopy_64.c | 4 +- arch/x86/mm/extable.c | 114 +++++++++++-- arch/x86/mm/fault.c | 26 +-- arch/x86/tools/relocs.c | 10 ++ arch/x86/um/asm/elf.h | 3 +- arch/xtensa/kernel/Makefile | 4 +- drivers/misc/lkdtm/core.c | 1 + drivers/misc/lkdtm/lkdtm.h | 1 + drivers/misc/lkdtm/usercopy.c | 13 ++ fs/namespace.c | 2 + include/asm-generic/bug.h | 8 +- include/asm-generic/qrwlock.h | 7 +- include/asm-generic/qspinlock.h | 16 +- include/asm-generic/vmlinux.lds.h | 11 +- include/linux/compiler.h | 56 +++++-- include/linux/debug_locks.h | 4 +- include/linux/jump_label.h | 65 ++++++- include/linux/lockdep.h | 7 +- include/linux/rwsem.h | 4 +- include/linux/sched.h | 6 + init/main.c | 1 - kernel/cpu.c | 28 ++++ kernel/futex.c | 4 +- kernel/jump_label.c | 107 ++++++------ kernel/locking/lockdep.c | 116 ++++--------- kernel/locking/lockdep_internals.h | 27 +++ kernel/locking/lockdep_proc.c | 2 +- kernel/locking/qspinlock.c | 143 +++++++++++----- kernel/locking/qspinlock_paravirt.h | 4 +- kernel/locking/qspinlock_stat.h | 6 + kernel/locking/rtmutex.c | 4 +- kernel/locking/rwsem-xadd.c | 15 +- kernel/locking/rwsem.c | 7 +- kernel/locking/rwsem.h | 95 ++++++++--- kernel/module.c | 9 + lib/debug_locks.c | 6 +- mm/maccess.c | 6 + scripts/Kbuild.include | 4 +- scripts/mod/Makefile | 2 + tools/memory-model/Documentation/explanation.txt | 186 ++++++++++++++++----- tools/memory-model/Documentation/recipes.txt | 2 +- tools/memory-model/README | 39 +++++ tools/memory-model/linux-kernel.cat | 8 +- .../ISA2+pooncelock+pooncelock+pombonce.litmus | 7 +- tools/memory-model/litmus-tests/README | 104 +++++++++++- tools/objtool/special.c | 4 +- 95 files changed, 1522 insertions(+), 934 deletions(-) create mode 100644 arch/x86/kernel/macros.S
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