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2019-03-08Merge tag 'io_uring-2019-03-06' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull io_uring IO interface from Jens Axboe: "Second attempt at adding the io_uring interface. Since the first one, we've added basic unit testing of the three system calls, that resides in liburing like the other unit tests that we have so far. It'll take a while to get full coverage of it, but we're working towards it. I've also added two basic test programs to tools/io_uring. One uses the raw interface and has support for all the various features that io_uring supports outside of standard IO, like fixed files, fixed IO buffers, and polled IO. The other uses the liburing API, and is a simplified version of cp(1). This adds support for a new IO interface, io_uring. io_uring allows an application to communicate with the kernel through two rings, the submission queue (SQ) and completion queue (CQ) ring. This allows for very efficient handling of IOs, see the v5 posting for some basic numbers: https://lore.kernel.org/linux-block/20190116175003.17880-1-axboe@kernel.dk/ Outside of just efficiency, the interface is also flexible and extendable, and allows for future use cases like the upcoming NVMe key-value store API, networked IO, and so on. It also supports async buffered IO, something that we've always failed to support in the kernel. Outside of basic IO features, it supports async polled IO as well. This particular feature has already been tested at Facebook months ago for flash storage boxes, with 25-33% improvements. It makes polled IO actually useful for real world use cases, where even basic flash sees a nice win in terms of efficiency, latency, and performance. These boxes were IOPS bound before, now they are not. This series adds three new system calls. One for setting up an io_uring instance (io_uring_setup(2)), one for submitting/completing IO (io_uring_enter(2)), and one for aux functions like registrating file sets, buffers, etc (io_uring_register(2)). Through the help of Arnd, I've coordinated the syscall numbers so merge on that front should be painless. Jon did a writeup of the interface a while back, which (except for minor details that have been tweaked) is still accurate. Find that here: https://lwn.net/Articles/776703/ Huge thanks to Al Viro for helping getting the reference cycle code correct, and to Jann Horn for his extensive reviews focused on both security and bugs in general. There's a userspace library that provides basic functionality for applications that don't need or want to care about how to fiddle with the rings directly. It has helpers to allow applications to easily set up an io_uring instance, and submit/complete IO through it without knowing about the intricacies of the rings. It also includes man pages (thanks to Jeff Moyer), and will continue to grow support helper functions and features as time progresses. Find it here: git://git.kernel.dk/liburing Fio has full support for the raw interface, both in the form of an IO engine (io_uring), but also with a small test application (t/io_uring) that can exercise and benchmark the interface" * tag 'io_uring-2019-03-06' of git://git.kernel.dk/linux-block: io_uring: add a few test tools io_uring: allow workqueue item to handle multiple buffered requests io_uring: add support for IORING_OP_POLL io_uring: add io_kiocb ref count io_uring: add submission polling io_uring: add file set registration net: split out functions related to registering inflight socket files io_uring: add support for pre-mapped user IO buffers block: implement bio helper to add iter bvec pages to bio io_uring: batch io_kiocb allocation io_uring: use fget/fput_many() for file references fs: add fget_many() and fput_many() io_uring: support for IO polling io_uring: add fsync support Add io_uring IO interface
2019-03-08bpf, libbpf: fixing leak when kernel does not support btfNikita V. Shirokov
We could end up in situation when we have object file w/ all btf info, but kernel does not support btf yet. In this situation currently libbpf just set obj->btf to NULL w/o freeing it first. This patch is fixing it by making sure to run btf__free first. Fixes: d29d87f7e612 ("btf: separate btf creation and loading") Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-08Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching Pull livepatching updates from Jiri Kosina: - support for something we call 'atomic replace', and allows for much better handling of cumulative patches (which is something very useful for distros), from Jason Baron with help of Petr Mladek and Joe Lawrence - improvement of handling of tasks blocking finalization, from Miroslav Benes - update of MAINTAINERS file to reflect move towards group maintainership * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching: (22 commits) livepatch/selftests: use "$@" to preserve argument list livepatch: Module coming and going callbacks can proceed with all listed patches livepatch: Proper error handling in the shadow variables selftest livepatch: return -ENOMEM on ptr_id() allocation failure livepatch: Introduce klp_for_each_patch macro livepatch: core: Return EOPNOTSUPP instead of ENOSYS selftests/livepatch: add DYNAMIC_DEBUG config dependency livepatch: samples: non static warnings fix livepatch: update MAINTAINERS livepatch: Remove signal sysfs attribute livepatch: Send a fake signal periodically selftests/livepatch: introduce tests livepatch: Remove ordering (stacking) of the livepatches livepatch: Atomic replace and cumulative patches documentation livepatch: Remove Nop structures when unused livepatch: Add atomic replace livepatch: Use lists to manage patches, objects and functions livepatch: Simplify API by removing registration step livepatch: Don't block the removal of patches loaded after a forced transition livepatch: Consolidate klp_free functions ...
2019-03-07Merge tag 'powerpc-5.1-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Notable changes: - Enable THREAD_INFO_IN_TASK to move thread_info off the stack. - A big series from Christoph reworking our DMA code to use more of the generic infrastructure, as he said: "This series switches the powerpc port to use the generic swiotlb and noncoherent dma ops, and to use more generic code for the coherent direct mapping, as well as removing a lot of dead code." - Increase our vmalloc space to 512T with the Hash MMU on modern CPUs, allowing us to support machines with larger amounts of total RAM or distance between nodes. - Two series from Christophe, one to optimise TLB miss handlers on 6xx, and another to optimise the way STRICT_KERNEL_RWX is implemented on some 32-bit CPUs. - Support for KCOV coverage instrumentation which means we can run syzkaller and discover even more bugs in our code. And as always many clean-ups, reworks and minor fixes etc. Thanks to: Alan Modra, Alexey Kardashevskiy, Alistair Popple, Andrea Arcangeli, Andrew Donnellan, Aneesh Kumar K.V, Aravinda Prasad, Balbir Singh, Brajeswar Ghosh, Breno Leitao, Christian Lamparter, Christian Zigotzky, Christophe Leroy, Christoph Hellwig, Corentin Labbe, Daniel Axtens, David Gibson, Diana Craciun, Firoz Khan, Gustavo A. R. Silva, Igor Stoppa, Joe Lawrence, Joel Stanley, Jonathan Neuschäfer, Jordan Niethe, Laurent Dufour, Madhavan Srinivasan, Mahesh Salgaonkar, Mark Cave-Ayland, Masahiro Yamada, Mathieu Malaterre, Matteo Croce, Meelis Roos, Michael W. Bringmann, Nathan Chancellor, Nathan Fontenot, Nicholas Piggin, Nick Desaulniers, Nicolai Stange, Oliver O'Halloran, Paul Mackerras, Peter Xu, PrasannaKumar Muralidharan, Qian Cai, Rashmica Gupta, Reza Arbab, Robert P. J. Day, Russell Currey, Sabyasachi Gupta, Sam Bobroff, Sandipan Das, Sergey Senozhatsky, Souptick Joarder, Stewart Smith, Tyrel Datwyler, Vaibhav Jain, YueHaibing" * tag 'powerpc-5.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (200 commits) powerpc/32: Clear on-stack exception marker upon exception return powerpc: Remove export of save_stack_trace_tsk_reliable() powerpc/mm: fix "section_base" set but not used powerpc/mm: Fix "sz" set but not used warning powerpc/mm: Check secondary hash page table powerpc: remove nargs from __SYSCALL powerpc/64s: Fix unrelocated interrupt trampoline address test powerpc/powernv/ioda: Fix locked_vm counting for memory used by IOMMU tables powerpc/fsl: Fix the flush of branch predictor. powerpc/powernv: Make opal log only readable by root powerpc/xmon: Fix opcode being uninitialized in print_insn_powerpc powerpc/powernv: move OPAL call wrapper tracing and interrupt handling to C powerpc/64s: Fix data interrupts vs d-side MCE reentrancy powerpc/64s: Prepare to handle data interrupts vs d-side MCE reentrancy powerpc/64s: system reset interrupt preserve HSRRs powerpc/64s: Fix HV NMI vs HV interrupt recoverability test powerpc/mm/hash: Handle mmap_min_addr correctly in get_unmapped_area topdown search powerpc/hugetlb: Handle mmap_min_addr correctly in get_unmapped_area callback selftests/powerpc: Remove duplicate header powerpc sstep: Add support for modsd, modud instructions ...
2019-03-07Merge branch 'next-general' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security Pull security subsystem updates from James Morris: - Extend LSM stacking to allow sharing of cred, file, ipc, inode, and task blobs. This paves the way for more full-featured LSMs to be merged, and is specifically aimed at LandLock and SARA LSMs. This work is from Casey and Kees. - There's a new LSM from Micah Morton: "SafeSetID gates the setid family of syscalls to restrict UID/GID transitions from a given UID/GID to only those approved by a system-wide whitelist." This feature is currently shipping in ChromeOS. * 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (62 commits) keys: fix missing __user in KEYCTL_PKEY_QUERY LSM: Update list of SECURITYFS users in Kconfig LSM: Ignore "security=" when "lsm=" is specified LSM: Update function documentation for cap_capable security: mark expected switch fall-throughs and add a missing break tomoyo: Bump version. LSM: fix return value check in safesetid_init_securityfs() LSM: SafeSetID: add selftest LSM: SafeSetID: remove unused include LSM: SafeSetID: 'depend' on CONFIG_SECURITY LSM: Add 'name' field for SafeSetID in DEFINE_LSM LSM: add SafeSetID module that gates setid calls LSM: add SafeSetID module that gates setid calls tomoyo: Allow multiple use_group lines. tomoyo: Coding style fix. tomoyo: Swicth from cred->security to task_struct->security. security: keys: annotate implicit fall throughs security: keys: annotate implicit fall throughs security: keys: annotate implicit fall through capabilities:: annotate implicit fall through ...
2019-03-07bpf: fix replace_map_fd_with_map_ptr's ldimm64 second imm fieldDaniel Borkmann
Non-zero imm value in the second part of the ldimm64 instruction for BPF_PSEUDO_MAP_FD is invalid, and thus must be rejected. The map fd only ever sits in the first instructions' imm field. None of the BPF loaders known to us are using it, so risk of regression is minimal. For clarity and consistency, the few insn->{src_reg,imm} occurrences are rewritten into insn[0].{src_reg,imm}. Add a test case to the BPF selftest suite as well. Fixes: 0246e64d9a5f ("bpf: handle pseudo BPF_LD_IMM64 insn") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2019-03-07selftests: bpf: test_progs: initialize duration in singal_pending testStanislav Fomichev
CHECK macro implicitly uses duration. We call CHECK() a couple of times before duration is initialized from bpf_prog_test_run(). Explicitly set duration to 0 to avoid compiler warnings. Fixes: 740f8a657221 ("selftests/bpf: make sure signal interrupts BPF_PROG_TEST_RUN") Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-07libbpf: force fixdep compilation at the start of the buildStanislav Fomichev
libbpf targets don't explicitly depend on fixdep target, so when we do 'make -j$(nproc)', there is a high probability, that some objects will be built before fixdep binary is available. Fix this by running sub-make; this makes sure that fixdep dependency is properly accounted for. For the same issue in perf, see commit abb26210a395 ("perf tools: Force fixdep compilation at the start of the build"). Before: $ rm -rf /tmp/bld; mkdir /tmp/bld; make -j$(nproc) O=/tmp/bld -C tools/lib/bpf/ Auto-detecting system features: ... libelf: [ on ] ... bpf: [ on ] HOSTCC /tmp/bld/fixdep.o CC /tmp/bld/libbpf.o CC /tmp/bld/bpf.o CC /tmp/bld/btf.o CC /tmp/bld/nlattr.o CC /tmp/bld/libbpf_errno.o CC /tmp/bld/str_error.o CC /tmp/bld/netlink.o CC /tmp/bld/bpf_prog_linfo.o CC /tmp/bld/libbpf_probes.o CC /tmp/bld/xsk.o HOSTLD /tmp/bld/fixdep-in.o LINK /tmp/bld/fixdep LD /tmp/bld/libbpf-in.o LINK /tmp/bld/libbpf.a LINK /tmp/bld/libbpf.so LINK /tmp/bld/test_libbpf $ head /tmp/bld/.libbpf.o.cmd # cannot find fixdep (/usr/local/google/home/sdf/src/linux/xxx//fixdep) # using basic dep data /tmp/bld/libbpf.o: libbpf.c /usr/include/stdc-predef.h \ /usr/include/stdlib.h /usr/include/features.h \ /usr/include/x86_64-linux-gnu/sys/cdefs.h \ /usr/include/x86_64-linux-gnu/bits/wordsize.h \ /usr/include/x86_64-linux-gnu/gnu/stubs.h \ /usr/include/x86_64-linux-gnu/gnu/stubs-64.h \ /usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h \ After: $ rm -rf /tmp/bld; mkdir /tmp/bld; make -j$(nproc) O=/tmp/bld -C tools/lib/bpf/ Auto-detecting system features: ... libelf: [ on ] ... bpf: [ on ] HOSTCC /tmp/bld/fixdep.o HOSTLD /tmp/bld/fixdep-in.o LINK /tmp/bld/fixdep CC /tmp/bld/libbpf.o CC /tmp/bld/bpf.o CC /tmp/bld/nlattr.o CC /tmp/bld/btf.o CC /tmp/bld/libbpf_errno.o CC /tmp/bld/str_error.o CC /tmp/bld/netlink.o CC /tmp/bld/bpf_prog_linfo.o CC /tmp/bld/libbpf_probes.o CC /tmp/bld/xsk.o LD /tmp/bld/libbpf-in.o LINK /tmp/bld/libbpf.a LINK /tmp/bld/libbpf.so LINK /tmp/bld/test_libbpf $ head /tmp/bld/.libbpf.o.cmd cmd_/tmp/bld/libbpf.o := gcc -Wp,-MD,/tmp/bld/.libbpf.o.d -Wp,-MT,/tmp/bld/libbpf.o -g -Wall -DHAVE_LIBELF_MMAP_SUPPORT -DCOMPAT_NEED_REALLOCARRAY -Wbad-function-cast -Wdeclaration-after-statement -Wformat-security -Wformat-y2k -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wno-system-headers -Wold-style-definition -Wpacked -Wredundant-decls -Wshadow -Wstrict-prototypes -Wswitch-default -Wswitch-enum -Wundef -Wwrite-strings -Wformat -Wstrict-aliasing=3 -Werror -Wall -fPIC -I. -I/usr/local/google/home/sdf/src/linux/tools/include -I/usr/local/google/home/sdf/src/linux/tools/arch/x86/include/uapi -I/usr/local/google/home/sdf/src/linux/tools/include/uapi -fvisibility=hidden -D"BUILD_STR(s)=$(pound)s" -c -o /tmp/bld/libbpf.o libbpf.c source_/tmp/bld/libbpf.o := libbpf.c deps_/tmp/bld/libbpf.o := \ /usr/include/stdc-predef.h \ /usr/include/stdlib.h \ /usr/include/features.h \ /usr/include/x86_64-linux-gnu/sys/cdefs.h \ /usr/include/x86_64-linux-gnu/bits/wordsize.h \ Fixes: 7c422f557266 ("tools build: Build fixdep helper from perf and basic libs") Reported-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-07selftests: bpf: fix compilation with out-of-tree $(OUTPUT)Stanislav Fomichev
A bunch of related changes lumped together: * Create prog_tests and verifier output directories; these don't exist with out-of-tree $(OUTPUT) * Add missing -I (via separate TEST_{PROGS,VERIFIER}_CFLAGS) for the main tree ($(PWD) != $(OUTPUT) for out-of-tree) * Add libbpf.a dependency for test_progs_32 (parallel make fails otherwise) * Add missing "; \" after "cd" when generating test.h headers Tested by: $ alias m="make -s -j$(nproc)" $ m -C tools/testing/selftests/bpf/ clean $ m -C tools/lib/bpf/ clean $ rm -rf xxx; mkdir xxx; m -C tools/testing/selftests/bpf/ OUTPUT=$PWD/xxx $ m -C tools/testing/selftests/bpf/ Fixes: 3f30658830f3 ("selftests: bpf: break up test_progs - preparations") Fixes: 2dfb40121ee8 ("selftests: bpf: prepare for break up of verifier tests") Fixes: 3ef84346c561 ("selftests: bpf: makefile support sub-register code-gen test mode") Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-07selftests/bpf: test that GSO works in lwt_ip_encapPeter Oskolkov
Add a test on egress that a large TCP packet successfully goes through the lwt+bpf encap tunnel. Although there is no direct evidence that GSO worked, as opposed to e.g. TCP segmentation or IP fragmentation (maybe a kernel stats counter should be added to track the number of failed GSO attempts?), without the previous patch in the patchset this test fails, and printk-debugging showed that software-based GSO succeeded here (veth is not compatible with SKB_GSO_DODGY, so GSO happens in the software stack). Also removed an unnecessary nodad and added a missed failed flag. Signed-off-by: Peter Oskolkov <posk@google.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-03-06Merge tag 'staging-5.1-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO updates from Greg KH: "Here is the big staging/iio driver pull request for 5.1-rc1. Lots of good IIO driver updates and cleanups in here as always. Combined with the removal of the xgifb driver, we have a net "loss" of over 9000 lines in the pull request, always a nice thing. As the outreachy application process is currently happening, there are loads of tiny checkpatch cleanup fixes all over the staging tree, which accounts for the majority of the fixups" * tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (341 commits) staging: mt7621-dma: remove license boilerplate text staging: mt7621-dma: add SPDX GPL-2.0+ license identifier Staging: ks7010: Replace typecast to int Staging: vt6655: Align a static function declaration staging: speakup: fix line over 80 characters. staging: mt7621-eth: Remove license boilerplate text staging: mt7621-eth: Add SPDX license identifier staging: ks7010: removed custom Michael MIC implementation. staging: rtl8192e: Fix space and suspect issue Staging: vt6655: Modify comment style of SPDX License Identifier Staging: vt6655: Modify comment style for SPDX-License-Identifier Staging: vt6655: Align a function declaration Staging: vt6655: Alignment of function declaration staging: rtl8712: Fix indentation issue staging: wilc1000: fix incorrent type in initializer staging: rtl8188eu: remove unused P2P_PRIVATE_IOCTL_SET_LEN staging: rtl8188eu: remove unused enum P2P_PROTO_WK_ID staging: rtl8723bs: Remove duplicated include from drv_types.h Staging: vt6655: Alignment should match open parenthesis staging: erofs: fix mis-acted TAIL merging behavior ...
2019-03-06Merge tag 'driver-core-5.1-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg KH: "Here is the big driver core patchset for 5.1-rc1 More patches than "normal" here this merge window, due to some work in the driver core by Alexander Duyck to rework the async probe functionality to work better for a number of devices, and independant work from Rafael for the device link functionality to make it work "correctly". Also in here is: - lots of BUS_ATTR() removals, the macro is about to go away - firmware test fixups - ihex fixups and simplification - component additions (also includes i915 patches) - lots of minor coding style fixups and cleanups. All of these have been in linux-next for a while with no reported issues" * tag 'driver-core-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (65 commits) driver core: platform: remove misleading err_alloc label platform: set of_node in platform_device_register_full() firmware: hardcode the debug message for -ENOENT driver core: Add missing description of new struct device_link field driver core: Fix PM-runtime for links added during consumer probe drivers/component: kerneldoc polish async: Add cmdline option to specify drivers to be async probed driver core: Fix possible supplier PM-usage counter imbalance PM-runtime: Fix __pm_runtime_set_status() race with runtime resume driver: platform: Support parsing GpioInt 0 in platform_get_irq() selftests: firmware: fix verify_reqs() return value Revert "selftests: firmware: remove use of non-standard diff -Z option" Revert "selftests: firmware: add CONFIG_FW_LOADER_USER_HELPER_FALLBACK to config" device: Fix comment for driver_data in struct device kernfs: Allocating memory for kernfs_iattrs with kmem_cache. sysfs: remove unused include of kernfs-internal.h driver core: Postpone DMA tear-down until after devres release driver core: Document limitation related to DL_FLAG_RPM_ACTIVE PM-runtime: Take suppliers into account in __pm_runtime_set_status() device.h: Add __cold to dev_<level> logging functions ...
2019-03-06Merge tag 'acpi-5.1-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull ACPI updates from Rafael Wysocki: "These are ACPICA updates including ACPI 6.3 support among other things, APEI updates including the ARM Software Delegated Exception Interface (SDEI) support, ACPI EC driver fixes and cleanups and other assorted improvements. Specifics: - Update the ACPICA code in the kernel to upstream revision 20190215 including ACPI 6.3 support and more: * New predefined methods: _NBS, _NCH, _NIC, _NIH, and _NIG (Erik Schmauss). * Update of the PCC Identifier structure in PDTT (Erik Schmauss). * Support for new Generic Affinity Structure subtable in SRAT (Erik Schmauss). * New PCC operation region support (Erik Schmauss). * Support for GICC statistical profiling for MADT (Erik Schmauss). * New Error Disconnect Recover notification support (Erik Schmauss). * New PPTT Processor Structure Flags fields support (Erik Schmauss). * ACPI 6.3 HMAT updates (Erik Schmauss). * GTDT Revision 3 support (Erik Schmauss). * Legacy module-level code (MLC) support removal (Erik Schmauss). * Update/clarification of messages for control method failures (Bob Moore). * Warning on creation of a zero-length opregion (Bob Moore). * acpiexec option to dump extra info for memory leaks (Bob Moore). * More ACPI error to firmware error conversions (Bob Moore). * Debugger fix (Bob Moore). * Copyrights update (Bob Moore) - Clean up sleep states support code in ACPICA (Christoph Hellwig) - Rework in_nmi() handling in the APEI code and add suppor for the ARM Software Delegated Exception Interface (SDEI) to it (James Morse) - Fix possible out-of-bounds accesses in BERT-related core (Ross Lagerwall) - Fix the APEI code parsing HEST that includes a Deferred Machine Check subtable (Yazen Ghannam) - Use DEFINE_DEBUGFS_ATTRIBUTE for APEI-related debugfs files (YueHaibing) - Switch the APEI ERST code to the new generic UUID API (Andy Shevchenko) - Update the MAINTAINERS entry for APEI (Borislav Petkov) - Fix and clean up the ACPI EC driver (Rafael Wysocki, Zhang Rui) - Fix DMI checks handling in the ACPI backlight driver and add the "Lunch Box" chassis-type check to it (Hans de Goede) - Add support for using ACPI table overrides included in built-in initrd images (Shunyong Yang) - Update ACPI device enumeration to treat the PWM2 device as "always present" on Lenovo Yoga Book (Yauhen Kharuzhy) - Fix up the enumeration of device objects with the PRP0001 device ID (Andy Shevchenko) - Clean up PPTT parsing error messages (John Garry) - Clean up debugfs files creation handling (Greg Kroah-Hartman, Rafael Wysocki) - Clean up the ACPI DPTF Makefile (Masahiro Yamada)" * tag 'acpi-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (65 commits) ACPI / bus: Respect PRP0001 when retrieving device match data ACPICA: Update version to 20190215 ACPI/ACPICA: Trivial: fix spelling mistakes and fix whitespace formatting ACPICA: ACPI 6.3: add GTDT Revision 3 support ACPICA: ACPI 6.3: HMAT updates ACPICA: ACPI 6.3: PPTT add additional fields in Processor Structure Flags ACPICA: ACPI 6.3: add Error Disconnect Recover Notification value ACPICA: ACPI 6.3: MADT: add support for statistical profiling in GICC ACPICA: ACPI 6.3: add PCC operation region support for AML interpreter efi: cper: Fix possible out-of-bounds access ACPI: APEI: Fix possible out-of-bounds access to BERT region ACPICA: ACPI 6.3: SRAT: add Generic Affinity Structure subtable ACPICA: ACPI 6.3: Add Trigger order to PCC Identifier structure in PDTT ACPICA: ACPI 6.3: Adding predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG ACPICA: Update/clarify messages for control method failures ACPICA: Debugger: Fix possible fault with the "test objects" command ACPICA: Interpreter: Emit warning for creation of a zero-length op region ACPICA: Remove legacy module-level code support ACPI / x86: Make PWM2 device always present at Lenovo Yoga Book ACPI / video: Extend chassis-type detection with a "Lunch Box" check ..
2019-03-06perf data: Force perf_data__open|close zero data->file.pathJiri Olsa
Making sure the data->file.path is zeroed on perf_data__open error path and in perf_data__close, so we don't double free it in case someone call it twice. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-9-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf session: Fix double free in perf_data__closeJiri Olsa
We can't call perf_data__close and subsequently perf_session__delete, because it will call perf_data__close again and cause double free for data->file.path. $ perf report -i . incompatible file format (rerun with -v to learn more) free(): double free detected in tcache 2 Aborted (core dumped) In fact we don't need to call perf_data__close at all, because at the time the got out_close is reached, session->data is already initialized, so the perf_data__close call will be triggered from perf_session__delete. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Fixes: 2d4f27999b88 ("perf data: Add global path holder") Link: http://lkml.kernel.org/r/20190305152536.21035-8-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf evsel: Probe for precise_ip with simple attrJiri Olsa
Currently we probe for precise_ip with user specified perf_event_attr, which might fail because of unsupported kernel features, which would get disabled during the open time anyway. Switching the probe to take place on simple hw cycles, so the following record sets proper precise_ip: # perf record -e cycles:P ls # perf evlist -v cycles:P: size: 112, ... precise_ip: 3, ... Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-7-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf tools: Read and store caps/max_precise in perf_pmuJiri Olsa
Read the caps/max_precise value and store it in struct perf_pmu to be used when setting the maximum precise_ip field in following patch. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-5-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf hist: Fix memory leak of srclineJiri Olsa
We can't allocate he->srcline unconditionaly, only when new hist_entry is created. Moving he->srcline allocation into hist_entry__init function. Original-patch-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Suggested-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Nageswara R Sastry <nasastry@in.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-4-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf hist: Add error path into hist_entry__initJiri Olsa
Adding error path into hist_entry__init to unify error handling, so every new member does not need to free everything else. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: nageswara r sastry <nasastry@in.ibm.com> Link: http://lkml.kernel.org/r/20190305152536.21035-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf c2c: Fix c2c report for empty numa nodeJiri Olsa
Ravi Bangoria reported that we fail with an empty NUMA node with the following message: $ lscpu NUMA node0 CPU(s): NUMA node1 CPU(s): 0-4 $ sudo ./perf c2c report node/cpu topology bugFailed setup nodes Fix this by detecting the empty node and keeping its CPU set empty. Reported-by: Nageswara R Sastry <nasastry@in.ibm.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190305152536.21035-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf script python: Add Python3 support to intel-pt-events.pyTony Jones
Support both Python2 and Python3 in the intel-pt-events.py script There may be differences in the ordering of output lines due to differences in dictionary ordering etc. However the format within lines should be unchanged. The use of 'from __future__' implies the minimum supported Python2 version is now v2.6 Signed-off-by: Tony Jones <tonyj@suse.de> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/fd26acf9-0c0f-717f-9664-a3c33043ce19@suse.de Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf script python: Add Python3 support to event_analyzing_sample.pyTony Jones
Support both Python2 and Python3 in the event_analyzing_sample.py script There may be differences in the ordering of output lines due to differences in dictionary ordering etc. However the format within lines should be unchanged. The use of 'from __future__' implies the minimum supported Python2 version is now v2.6 Signed-off-by: Tony Jones <tonyj@suse.de> Cc: Feng Tang <feng.tang@intel.com> Link: http://lkml.kernel.org/r/20190302011903.2416-5-tonyj@suse.de Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf script python: add Python3 support to check-perf-trace.pyTony Jones
Support both Python 2 and Python 3 in the check-perf-trace.py script. There may be differences in the ordering of output lines due to differences in dictionary ordering etc. However the format within lines should be unchanged. The use of from __future__ implies the minimum supported version of Python2 is now v2.6 Signed-off-by: Tony Jones <tonyj@suse.de> Cc: Tom Zanussi <tzanussi@gmail.com> Link: http://lkml.kernel.org/r/20190302011903.2416-4-tonyj@suse.de Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf script python: Add Python3 support to futex-contention.pyTony Jones
Support both Python2 and Python3 in the futex-contention.py script There may be differences in the ordering of output lines due to differences in dictionary ordering etc. However the format within lines should be unchanged. The use of 'from __future__' implies the minimum supported Python2 version is now v2.6 Signed-off-by: Tony Jones <tonyj@suse.de> Link: http://lkml.kernel.org/r/20190302011903.2416-3-tonyj@suse.de Signed-off-by: Seeteena Thoufeek <s1seetee@linux.vnet.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf script python: Remove mixed indentationTony Jones
Remove mixed indentation in Python scripts. Revert to either all tabs (most common form) or all spaces (4 or 8) depending on what was the intent of the original commit. This is necessary to complete Python3 support as it will flag an error if it encounters mixed indentation. Signed-off-by: Tony Jones <tonyj@suse.de> Link: http://lkml.kernel.org/r/20190302011903.2416-2-tonyj@suse.de Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf diff: Support --pid/--tid filter optionsJin Yao
Using the existing symbol_conf.pid_list_str and symbol_conf.tid_list_str logic. For example: perf diff --tid 13965 It'll only diff the samples for thread 13965. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1551791143-10334-4-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf diff: Support --cpu filter optionJin Yao
To improve 'perf diff', implement a --cpu filter option. Multiple CPUs can be provided as a comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. Default is to report samples on all CPUs. For example, perf diff --cpu 0,1 It only diff the samples for CPU0 and CPU1. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1551791143-10334-3-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf diff: Support --time filter optionJin Yao
To improve 'perf diff', implement a --time filter option to diff the samples within given time window. It supports time percent with multiple time ranges. The time string format is 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'. For example: Select the second 10% time slice to diff: perf diff --time 10%/2 Select from 0% to 10% time slice to diff: perf diff --time 0%-10% Select the first and the second 10% time slices to diff: perf diff --time 10%/1,10%/2 Select from 0% to 10% and 30% to 40% slices to diff: perf diff --time 0%-10%,30%-40% It also supports analysing samples within a given time window <start>,<stop>. Times have the format seconds.microseconds. If 'start' is not given (i.e., time string is ',x.y') then analysis starts at the beginning of the file. If the stop time is not given (i.e, time string is 'x.y,') then analysis goes to end of file. Time string is 'a1.b1,c1.d1:a2.b2,c2.d2'. Use ':' to separate timestamps for different perf.data files. For example, we get the timestamp information from perf script. perf script -i perf.data.old mgen 13940 [000] 3946.361400: ... perf script -i perf.data mgen 13940 [000] 3971.150589 ... perf diff --time 3946.361400,:3971.150589, It analyzes the perf.data.old from the timestamp 3946.361400 to the end of perf.data.old and analyzes the perf.data from the timestamp 3971.150589 to the end of perf.data. v4: --- Update abstime_str_dup(), let it return error if strdup is failed, and update __cmd_diff() accordingly. Signed-off-by: Jin Yao <yao.jin@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jin Yao <yao.jin@intel.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1551791143-10334-2-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf thread: Generalize function to copy from thread addr space from ↵Andi Kleen
intel-bts code Add a utility function to fetch executable code. Convert one user over to it. There are more places doing that, but they do significantly different actions, so they are not easy to fit into a single library function. Committer changes: . No need to cast around, make 'buf' be a void pointer. . Rename it to thread__memcpy() to reflect the fact it is about copying a chunk of memory from a thread, i.e. from its address space. . No need to have it in a separate object file, move it to thread.[ch] . Check the return of map__load(), the original code didn't do it, but since we're moving this around, check that as well. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/r/20190305144758.12397-2-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06io_uring: add a few test toolsJens Axboe
This adds two test programs in tools/io_uring/ that demonstrate both the raw io_uring API (and all features) through a small benchmark app, io_uring-bench, and the liburing exposed API in a simplified cp(1) implementation through io_uring-cp. Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-03-06perf annotate: Calculate the max instruction name, align column to thatArnaldo Carvalho de Melo
We were hardcoding '6' as the max instruction name, and we have lots that are longer than that, see the diff from two 'P' printed TUI annotations for a libc function that uses instructions with long names, such as 'vpmovmskb' with its 9 chars: --- __strcmp_avx2.annotation.before 2019-03-06 16:31:39.368020425 -0300 +++ __strcmp_avx2.annotation 2019-03-06 16:32:12.079450508 -0300 @@ -2,284 +2,284 @@ Event: cycles:ppp Percent endbr64 - 0.10 mov %edi,%eax + 0.10 mov %edi,%eax - xor %edx,%edx + xor %edx,%edx - 3.54 vpxor %ymm7,%ymm7,%ymm7 + 3.54 vpxor %ymm7,%ymm7,%ymm7 - or %esi,%eax + or %esi,%eax - and $0xfff,%eax + and $0xfff,%eax - cmp $0xf80,%eax + cmp $0xf80,%eax - ↓ jg 370 + ↓ jg 370 - 27.07 vmovdqu (%rdi),%ymm1 + 27.07 vmovdqu (%rdi),%ymm1 - 7.97 vpcmpeqb (%rsi),%ymm1,%ymm0 + 7.97 vpcmpeqb (%rsi),%ymm1,%ymm0 - 2.15 vpminub %ymm1,%ymm0,%ymm0 + 2.15 vpminub %ymm1,%ymm0,%ymm0 - 4.09 vpcmpeqb %ymm7,%ymm0,%ymm0 + 4.09 vpcmpeqb %ymm7,%ymm0,%ymm0 - 0.43 vpmovmskb %ymm0,%ecx + 0.43 vpmovmskb %ymm0,%ecx - 1.53 test %ecx,%ecx + 1.53 test %ecx,%ecx - ↓ je b0 + ↓ je b0 - 5.26 tzcnt %ecx,%edx + 5.26 tzcnt %ecx,%edx - 18.40 movzbl (%rdi,%rdx,1),%eax + 18.40 movzbl (%rdi,%rdx,1),%eax - 7.09 movzbl (%rsi,%rdx,1),%edx + 7.09 movzbl (%rsi,%rdx,1),%edx - 3.34 sub %edx,%eax + 3.34 sub %edx,%eax 2.37 vzeroupper ← retq nop - 50: tzcnt %ecx,%edx + 50: tzcnt %ecx,%edx - movzbl 0x20(%rdi,%rdx,1),%eax + movzbl 0x20(%rdi,%rdx,1),%eax - movzbl 0x20(%rsi,%rdx,1),%edx + movzbl 0x20(%rsi,%rdx,1),%edx - sub %edx,%eax + sub %edx,%eax vzeroupper ← retq - data16 nopw %cs:0x0(%rax,%rax,1) + data16 nopw %cs:0x0(%rax,%rax,1) Reported-by: Travis Downs <travis.downs@gmail.com> LPU-Reference: CAOBGo4z1KfmWeOm6Et0cnX5Z6DWsG2PQbAvRn1MhVPJmXHrc5g@mail.gmail.com Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-89wsdd9h9g6bvq52sgp6d0u4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc updates from Andrew Morton: - a few misc things - ocfs2 updates - most of MM * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (159 commits) tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate include proc: more robust bulk read test proc: test /proc/*/maps, smaps, smaps_rollup, statm proc: use seq_puts() everywhere proc: read kernel cpu stat pointer once proc: remove unused argument in proc_pid_lookup() fs/proc/thread_self.c: code cleanup for proc_setup_thread_self() fs/proc/self.c: code cleanup for proc_setup_self() proc: return exit code 4 for skipped tests mm,mremap: bail out earlier in mremap_to under map pressure mm/sparse: fix a bad comparison mm/memory.c: do_fault: avoid usage of stale vm_area_struct writeback: fix inode cgroup switching comment mm/huge_memory.c: fix "orig_pud" set but not used mm/hotplug: fix an imbalance with DEBUG_PAGEALLOC mm/memcontrol.c: fix bad line in comment mm/cma.c: cma_declare_contiguous: correct err handling mm/page_ext.c: fix an imbalance with kmemleak mm/compaction: pass pgdat to too_many_isolated() instead of zone mm: remove zone_lru_lock() function, access ->lru_lock directly ...
2019-03-06Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf updates from Ingo Molnar: "Lots of tooling updates - too many to list, here's a few highlights: - Various subcommand updates to 'perf trace', 'perf report', 'perf record', 'perf annotate', 'perf script', 'perf test', etc. - CPU and NUMA topology and affinity handling improvements, - HW tracing and HW support updates: - Intel PT updates - ARM CoreSight updates - vendor HW event updates - BPF updates - Tons of infrastructure updates, both on the build system and the library support side - Documentation updates. - ... and lots of other changes, see the changelog for details. Kernel side updates: - Tighten up kprobes blacklist handling, reduce the number of places where developers can install a kprobe and hang/crash the system. - Fix/enhance vma address filter handling. - Various PMU driver updates, small fixes and additions. - refcount_t conversions - BPF updates - error code propagation enhancements - misc other changes" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (238 commits) perf script python: Add Python3 support to syscall-counts-by-pid.py perf script python: Add Python3 support to syscall-counts.py perf script python: Add Python3 support to stat-cpi.py perf script python: Add Python3 support to stackcollapse.py perf script python: Add Python3 support to sctop.py perf script python: Add Python3 support to powerpc-hcalls.py perf script python: Add Python3 support to net_dropmonitor.py perf script python: Add Python3 support to mem-phys-addr.py perf script python: Add Python3 support to failed-syscalls-by-pid.py perf script python: Add Python3 support to netdev-times.py perf tools: Add perf_exe() helper to find perf binary perf script: Handle missing fields with -F +.. perf data: Add perf_data__open_dir_data function perf data: Add perf_data__(create_dir|close_dir) functions perf data: Fail check_backup in case of error perf data: Make check_backup work over directories perf tools: Add rm_rf_perf_data function perf tools: Add pattern name checking to rm_rf perf tools: Add depth checking to rm_rf perf data: Add global path holder ...
2019-03-06Merge branch 'locking-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking updates from Ingo Molnar: "The biggest part of this tree is the new auto-generated atomics API wrappers by Mark Rutland. The primary motivation was to allow instrumentation without uglifying the primary source code. The linecount increase comes from adding the auto-generated files to the Git space as well: include/asm-generic/atomic-instrumented.h | 1689 ++++++++++++++++-- include/asm-generic/atomic-long.h | 1174 ++++++++++--- include/linux/atomic-fallback.h | 2295 +++++++++++++++++++++++++ include/linux/atomic.h | 1241 +------------ I preferred this approach, so that the full call stack of the (already complex) locking APIs is still fully visible in 'git grep'. But if this is excessive we could certainly hide them. There's a separate build-time mechanism to determine whether the headers are out of date (they should never be stale if we do our job right). Anyway, nothing from this should be visible to regular kernel developers. Other changes: - Add support for dynamic keys, which removes a source of false positives in the workqueue code, among other things (Bart Van Assche) - Updates to tools/memory-model (Andrea Parri, Paul E. McKenney) - qspinlock, wake_q and lockdep micro-optimizations (Waiman Long) - misc other updates and enhancements" * 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits) locking/lockdep: Shrink struct lock_class_key locking/lockdep: Add module_param to enable consistency checks lockdep/lib/tests: Test dynamic key registration lockdep/lib/tests: Fix run_tests.sh kernel/workqueue: Use dynamic lockdep keys for workqueues locking/lockdep: Add support for dynamic keys locking/lockdep: Verify whether lock objects are small enough to be used as class keys locking/lockdep: Check data structure consistency locking/lockdep: Reuse lock chains that have been freed locking/lockdep: Fix a comment in add_chain_cache() locking/lockdep: Introduce lockdep_next_lockchain() and lock_chain_count() locking/lockdep: Reuse list entries that are no longer in use locking/lockdep: Free lock classes that are no longer in use locking/lockdep: Update two outdated comments locking/lockdep: Make it easy to detect whether or not inside a selftest locking/lockdep: Split lockdep_free_key_range() and lockdep_reset_lock() locking/lockdep: Initialize the locks_before and locks_after lists earlier locking/lockdep: Make zap_class() remove all matching lock order entries locking/lockdep: Reorder struct lock_class members locking/lockdep: Avoid that add_chain_cache() adds an invalid chain to the cache ...
2019-03-06perf clang: Remove needless extra semicolonYang Wei
Delete a superfluous semicolon in getBPFObjectFromModule(). Signed-off-by: Yang Wei <yang.wei9@zte.com.cn> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yang Wei <albin_yang@163.com> Link: http://lkml.kernel.org/r/1551710174-3349-1-git-send-email-albin_yang@163.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06perf bpf: Automatically add BTF ELF markersArnaldo Carvalho de Melo
The libbpf loader expects that some __btf_map_<MAP_NAME> structs be in place with the keys and values types of maps so that one can store the struct definitions and have them sent to the kernel via sys_bpf(fd, cmd = BTF_LOAD) and then later be retrievable via sys_bpf(fd, cmd = BPF_OBJ_GET_INFO_BY_FD) for use by tools such as 'bpftool map dump id MAP_ID'. Since we already have this for defining maps in 'perf trace' BPF events: bpf_map(name, _type, type_key, type_val, _max_entries) As used in the tools/perf/examples/bpf/augmented_raw_syscalls.c: --- 8< --- struct syscall { bool enabled; }; bpf_map(syscalls, ARRAY, int, struct syscall, 512); --- 8< --- All we need is to get all that already available info, piggyback on the 'bpf_map' define in tools/perf/include/bpf/bpf.h, that is included by 'perf trace' BPF programs and do that without requiring changes to the BPF programs already defining maps using 'bpf_map()'. So this is what we have before this patch: 1) With this in ~/.perfconfig to dump .c events as .o, aka save a copy so that we can use the .o later as a pre-compiled BPF bytecode: # grep '\[llvm\]' -A2 ~/.perfconfig [llvm] dump-obj = true clang-opt = -g # # clang --version clang version 9.0.0 (https://git.llvm.org/git/clang.git/ 7906282d3afec5dfdc2b27943fd6c0309086c507) (https://git.llvm.org/git/llvm.git/ a1b5de1ff8ae8bc79dc8e86e1f82565229bd0500) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /opt/llvm/bin 2) Note the -g there so that we get clang to generate debuginfo, and since the target is 'bpf' it will generate the BTF info in this clang version (9.0). 3) Run a simple 'perf record' specifiying as an event the augmented_raw_syscalls.c source code: # perf record -e /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.c sleep 1 LLVM: dumping /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.025 MB perf.data ] # file /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o: ELF 64-bit LSB relocatable, eBPF, version 1 (SYSV), with debug_info, not stripped 4) Look at the BTF structs encoded in it: # pahole -F btf --sizes /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o syscall_enter_args 64 0 augmented_filename 264 0 syscall 1 0 syscall_exit_args 24 0 bpf_map 28 0 # # pahole -F btf -C syscalls /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # pahole -F btf -C syscall /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o struct syscall { bool enabled; /* 0 1 */ /* size: 1, cachelines: 1, members: 1 */ /* last cacheline: 1 bytes */ }; # 5) Ok, with just this we don't have the markers expected by the libbpf loader and when we run with this BPF bytecode, because we have: # grep '\[trace\]' -A1 ~/.perfconfig [trace] add_events = /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # 6) Lets do a 'perf trace' system wide session using this BPF program: # perf trace -e *mmsg,open* Cache2 I/O/6885 openat(AT_FDCWD, "/home/acme/.cache/mozilla/firefox/ina67tev.default/cache2/entries/BA220AB2914006A7AE96D27BE6EA13DD77519FCA", O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR) = 106 Cache2 I/O/6885 openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 121 Cache2 I/O/6885 openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 121 Cache2 I/O/6885 openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 121 Cache2 I/O/6885 openat(AT_FDCWD, "/proc/self/mountinfo", O_RDONLY) = 121 DNS Res~ver #3/23340 openat(AT_FDCWD, "/etc/hosts", O_RDONLY|O_CLOEXEC) = 106 DNS Res~ver #3/23340 sendmmsg(106<socket:[3482690]>, 0x7f252f1fcaf0, 2, MSG_NOSIGNAL) = 2 Cache2 I/O/6885 openat(AT_FDCWD, "/home/acme/.cache/mozilla/firefox/ina67tev.default/cache2/entries/BA220AB2914006A7AE96D27BE6EA13DD77519FCA", O_RDWR) = 106 lighttpd/18915 openat(AT_FDCWD, "/proc/loadavg", O_RDONLY) = 12 7) While it runs lets see the maps that 'perf trace' + libbpf's BPF loader loaded into the kernel via sys_bpf(fd, BPF_BTF_LOAD, ...): # bpftool map list | tail -6 149: perf_event_array name __augmented_sys flags 0x0 key 4B value 4B max_entries 8 memlock 4096B 150: array name syscalls flags 0x0 key 4B value 1B max_entries 512 memlock 8192B 151: hash name pids_filtered flags 0x0 key 4B value 1B max_entries 64 memlock 8192B # 8) Dump the "pids_filtered", map, that will have one entry per PID that 'perf trace' wants filtered, which includes its own, to avoid a tracing feedback loop (perf trace shows the syscalls it does which generates more syscalls that it has to show that...), it also auto-filters the 'gnome-terminal' and 'sshd' parent PIDs, for the same reason: # bpftool map dump id 151 key: a5 0c 00 00 value: 01 key: 14 63 00 00 value: 01 Found 2 elements # 9) Since there is no BTF info available, it does a generic hex dump :-\ 10) Now, with this patch applied, we'll do steps 3 to 6 again and look with pahole if there are extra structs encoded in BTF: # pahole -F btf --sizes /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o syscall_enter_args 64 0 augmented_filename 264 0 syscall 1 0 syscall_exit_args 24 0 bpf_map 28 0 ____btf_map___augmented_syscalls__ 8 0 ____btf_map_syscalls 8 0 ____btf_map_pids_filtered 8 0 # 11) Yes, those __btf_map_ + the map names, lets see how they look like: # pahole -F btf -C ____btf_map_syscalls /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o struct ____btf_map_syscalls { int key; /* 0 4 */ struct syscall value; /* 4 1 */ /* size: 8, cachelines: 1, members: 2 */ /* padding: 3 */ /* last cacheline: 8 bytes */ }; # 12) Lets repeat step 7 to get the new map ids: # bpftool map list | tail -6 155: perf_event_array name __augmented_sys flags 0x0 key 4B value 4B max_entries 8 memlock 4096B 156: array name syscalls flags 0x0 key 4B value 1B max_entries 512 memlock 8192B 157: hash name pids_filtered flags 0x0 key 4B value 1B max_entries 64 memlock 8192B # 13) And finally lets dump the 'pids_filtered': # bpftool map dump id 157 [{ "key": 3237, "value": true },{ "key": 26435, "value": true } ] # Looks much better! BTF info was used to interpret the key as an integer and the value as a struct with just one boolean member, so to make it more compact, show just the 'true' value where we saw '01'. Now to make 'perf trace --dump-map' to use BTF! Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: Yonghong Song <yhs@fb.com> Link: https://lkml.kernel.org/n/tip-ybuf9wpkm30xk28iq7jbwb40@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2019-03-06Merge tag 'linux-cpupower-5.1-rc1' of ↵Rafael J. Wysocki
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux Pull cpupower updates for 5.1-rc1 from Shuah Khan: "This cpupower update for Linux 5.1-rc1 consists of a patch to add support to display boost frequency separately from Abhishek Goel." * tag 'linux-cpupower-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux: tools/power/cpupower: Display boost frequency separately
2019-03-05tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate includeSouptick Joarder
Remove duplicate header which is included twice. Link: http://lkml.kernel.org/r/20190304182719.GA6606@jordon-HP-15-Notebook-PC Signed-off-by: Sabyasachi Gupta <sabyasachi.linux@gmail.com> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05proc: more robust bulk read testAlexey Dobriyan
/proc may not be mounted and test will exit successfully. Ensure proc is mounted at /proc. Link: http://lkml.kernel.org/r/20190209105613.GA10384@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05proc: test /proc/*/maps, smaps, smaps_rollup, statmAlexey Dobriyan
Start testing VM related fiels found in per-process files. Do it by jiting small executable which brings its address space to precisely known state, then comparing /proc/*/maps, smaps, smaps_rollup, and statm files to expected values. Currently only x86_64 is supported. [adobriyan@gmail.com: exit correctly in /proc/*/maps test] Link: http://lkml.kernel.org/r/20190206073659.GB15311@avx2 Link: http://lkml.kernel.org/r/20190203165806.GA14568@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05proc: return exit code 4 for skipped testsAlexey Dobriyan
Test harness uses 4 for SKIP, not 2. Link: http://lkml.kernel.org/r/20190108193108.GA12259@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05tmpfs: test link accounting with O_TMPFILEAlexey Dobriyan
Mount tmpfs with "nr_inodes=3" for easy check. Link: http://lkml.kernel.org/r/20190219215016.GA20084@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: Hugh Dickins <hughd@google.com> Cc: Matej Kupljen <matej.kupljen@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05tools/vm/slabinfo: clean up usage menu debug itemsTobin C. Harding
Attempt to make the usage comment for debug options a little cleaner. Link: http://lkml.kernel.org/r/20190212001219.27769-5-tobin@kernel.org Signed-off-by: Tobin C. Harding <tobin@kernel.org> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05tools/vm/slabinfo: align usage output columnsTobin C. Harding
Usage message uses spaces not tabspaces, a few tabspaces have snuck in making the columns not align correctly when output. Align usage output columns using spaces instead of tabspaces. Link: http://lkml.kernel.org/r/20190212001219.27769-4-tobin@kernel.org Signed-off-by: Tobin C. Harding <tobin@kernel.org> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05tools/vm/slabinfo: put options in alphabetic orderTobin C. Harding
Primarily the usage message lists options in alphabetic order however there are a bunch of the options that are not in alphabetic order. Put options in alphabetic order. Link: http://lkml.kernel.org/r/20190212001219.27769-3-tobin@kernel.org Signed-off-by: Tobin C. Harding <tobin@kernel.org> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05tools/vm/slabinfo: update options in usage messageTobin C. Harding
Currently usage message list only a subset of the available options. should list them all. Update options in usage massage to include all available options. Link: http://lkml.kernel.org/r/20190212001219.27769-2-tobin@kernel.org Signed-off-by: Tobin C. Harding <tobin@kernel.org> Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05selftests/memfd: add tests for F_SEAL_FUTURE_WRITE sealJoel Fernandes (Google)
Add tests to verify sealing memfds with the F_SEAL_FUTURE_WRITE works as expected. Link: http://lkml.kernel.org/r/20190112203816.85534-3-joel@joelfernandes.org Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> Reviewed-by: Shuah Khan <shuah@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Jann Horn <jannh@google.com> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Jeff Layton <jlayton@kernel.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Marc-Andr Lureau <marcandre.lureau@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05selftests/vm: add script helper for CONFIG_TEST_VMALLOC_MODULEUladzislau Rezki (Sony)
Add the test script for the kernel test driver to analyse vmalloc allocator for benchmarking and stressing purposes. It is just a kernel module loader. You can specify and pass different parameters in order to investigate allocations behaviour. See "usage" output for more details. Also add basic vmalloc smoke test to the "run_vmtests" suite. Link: http://lkml.kernel.org/r/20190103142108.20744-4-urezki@gmail.com Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Reviewed-by: Shuah Khan <shuah@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.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>
2019-03-05tools/: replace open encodings for NUMA_NO_NODEStephen Rothwell
This replaces all open encodings in tools with NUMA_NO_NODE. Also linux/numa.h is now needed for the perf build. [sfr@canb.auug.org.au: fix for replace open encodings for NUMA_NO_NODE] Link: http://lkml.kernel.org/r/20190108131141.730e9c4f@canb.auug.org.au Link: http://lkml.kernel.org/r/1545127933-10711-3-git-send-email-anshuman.khandual@arm.com Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: David Hildenbrand <david@redhat.com> Cc: Doug Ledford <dledford@redhat.com> [drivers/infiniband] Cc: Hans Verkuil <hverkuil@xs4all.nl> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> [ixgbe] Cc: Jens Axboe <axboe@kernel.dk> [mtip32xx] Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: Vinod Koul <vkoul@kernel.org> [dmaengine.c] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-05mm: convert PG_balloon to PG_offlineDavid Hildenbrand
PG_balloon was introduced to implement page migration/compaction for pages inflated in virtio-balloon. Nowadays, it is only a marker that a page is part of virtio-balloon and therefore logically offline. We also want to make use of this flag in other balloon drivers - for inflated pages or when onlining a section but keeping some pages offline (e.g. used right now by XEN and Hyper-V via set_online_page_callback()). We are going to expose this flag to dump tools like makedumpfile. But instead of exposing PG_balloon, let's generalize the concept of marking pages as logically offline, so it can be reused for other purposes later on. Rename PG_balloon to PG_offline. This is an indicator that the page is logically offline, the content stale and that it should not be touched (e.g. a hypervisor would have to allocate backing storage in order for the guest to dump an unused page). We can then e.g. exclude such pages from dumps. We replace and reuse KPF_BALLOON (23), as this shouldn't really harm (and for now the semantics stay the same). In following patches, we will make use of this bit also in other balloon drivers. While at it, document PGTABLE. [akpm@linux-foundation.org: fix comment text, per David] Link: http://lkml.kernel.org/r/20181119101616.8901-3-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Konstantin Khlebnikov <koct9i@gmail.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Pankaj gupta <pagupta@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Christian Hansen <chansen3@cisco.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Miles Chen <miles.chen@mediatek.com> Cc: David Rientjes <rientjes@google.com> Cc: Kazuhito Hagio <k-hagio@ab.jp.nec.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Dave Young <dyoung@redhat.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Juergen Gross <jgross@suse.com> Cc: Julien Freche <jfreche@vmware.com> Cc: Kairui Song <kasong@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Len Brown <len.brown@intel.com> Cc: Lianbo Jiang <lijiang@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Nadav Amit <namit@vmware.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Xavier Deguillard <xdeguillard@vmware.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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