d4414bc0e93d8da170fd0fc9fef65fe84015677d
25 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Paul E. McKenney
|
58679ad363 |
BACKPORT: rcu-tasks: Add an RCU Tasks Trace to simplify protection of tracing hooks
Because RCU does not watch exception early-entry/late-exit, idle-loop, or CPU-hotplug execution, protection of tracing and BPF operations is needlessly complicated. This commit therefore adds a variant of Tasks RCU that: o Has explicit read-side markers to allow finite grace periods in the face of in-kernel loops for PREEMPT=n builds. These markers are rcu_read_lock_trace() and rcu_read_unlock_trace(). o Protects code in the idle loop, exception entry/exit, and CPU-hotplug code paths. In this respect, RCU-tasks trace is similar to SRCU, but with lighter-weight readers. o Avoids expensive read-side instruction, having overhead similar to that of Preemptible RCU. There are of course downsides: o The grace-period code can send IPIs to CPUs, even when those CPUs are in the idle loop or in nohz_full userspace. This is mitigated by later commits. o It is necessary to scan the full tasklist, much as for Tasks RCU. o There is a single callback queue guarded by a single lock, again, much as for Tasks RCU. However, those early use cases that request multiple grace periods in quick succession are expected to do so from a single task, which makes the single lock almost irrelevant. If needed, multiple callback queues can be provided using any number of schemes. Perhaps most important, this variant of RCU does not affect the vanilla flavors, rcu_preempt and rcu_sched. The fact that RCU Tasks Trace readers can operate from idle, offline, and exception entry/exit in no way enables rcu_preempt and rcu_sched readers to do so. The memory ordering was outlined here: https://lore.kernel.org/lkml/20200319034030.GX3199@paulmck-ThinkPad-P72/ This effort benefited greatly from off-list discussions of BPF requirements with Alexei Starovoitov and Andrii Nakryiko. At least some of the on-list discussions are captured in the Link: tags below. In addition, KCSAN was quite helpful in finding some early bugs. Link: https://lore.kernel.org/lkml/20200219150744.428764577@infradead.org/ Link: https://lore.kernel.org/lkml/87mu8p797b.fsf@nanos.tec.linutronix.de/ Link: https://lore.kernel.org/lkml/20200225221305.605144982@linutronix.de/ Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Andrii Nakryiko <andriin@fb.com> [ paulmck: Apply feedback from Steve Rostedt and Joel Fernandes. ] [ paulmck: Decrement trc_n_readers_need_end upon IPI failure. ] [ paulmck: Fix locking issue reported by rcutorture. ] Change-Id: I8d076264fb9d08951262eb05b4d109ebe7c41f4f Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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JohnnLee
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fad96b1c77 |
Merge branch 'LA.UM.9.12.R1.11.00.00.597.108' via branch 'qcom-msm-4.19-7250' into android-msm-pixel-4.19
Conflicts: Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt Documentation/devicetree/bindings/iio/multiplexer/io-channel-mux.txt Documentation/devicetree/bindings/sound/wm8994.txt Documentation/devicetree/bindings/usb/dwc3.txt arch/arm64/configs/vendor/kona_defconfig arch/arm64/mm/init.c drivers/base/base.h drivers/base/core.c drivers/char/diag/diagfwd_rpmsg.c drivers/clk/clk.c drivers/gpu/msm/kgsl.c drivers/hwtracing/coresight/coresight-tmc-etf.c drivers/md/dm-default-key.c drivers/mmc/core/block.c drivers/mmc/core/queue.c drivers/mmc/host/sdhci-msm.c drivers/platform/msm/ipa/Makefile drivers/platform/msm/ipa/ipa_api.h drivers/platform/msm/usb_bam.c drivers/power/supply/power_supply_sysfs.c drivers/power/supply/qcom/qpnp-qg.c drivers/scsi/ufs/ufs-qcom.c drivers/scsi/ufs/ufshcd-crypto-qti.h drivers/scsi/ufs/ufshcd.c drivers/slimbus/qcom-ngd-ctrl.c drivers/soc/qcom/minidump_log.c drivers/soc/qcom/rq_stats.c drivers/tty/serial/msm_geni_serial.c drivers/usb/dwc3/gadget.c fs/crypto/crypto.c fs/crypto/keysetup_v1.c fs/f2fs/data.c fs/proc/task_mmu.c fs/sdcardfs/main.c include/crypto/ice.h include/linux/mm.h include/linux/power_supply.h include/linux/sched.h include/net/cfg80211.h include/soc/qcom/socinfo.h include/uapi/linux/v4l2-controls.h kernel/sched/cpufreq_schedutil.c kernel/sched/fair.c kernel/signal.c kernel/time/tick-sched.c mm/memory.c mm/oom_kill.c mm/vmalloc.c net/qrtr/qrtr.c Bug: 182748782 Change-Id: I81b2744d0ce40a5e524c5e3aa4d505b3ed305f8e Signed-off-by: JohnnLee <johnnlee@google.com> |
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Greg Kroah-Hartman
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98d8ec1f71 |
Merge 4.19.176 into android-4.19-stable
Changes in 4.19.176 tracing/kprobe: Fix to support kretprobe events on unloaded modules block: fix NULL pointer dereference in register_disk fgraph: Initialize tracing_graph_pause at task creation remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load af_key: relax availability checks for skb size calculation regulator: core: avoid regulator_resolve_supply() race condition chtls: Fix potential resource leak pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process() iwlwifi: mvm: take mutex for calling iwl_mvm_get_sync_time() iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap iwlwifi: pcie: fix context info memory leak iwlwifi: mvm: guard against device removal in reprobe SUNRPC: Move simple_get_bytes and simple_get_netobj into private header SUNRPC: Handle 0 length opaque XDR object data properly lib/string: Add strscpy_pad() function include/trace/events/writeback.h: fix -Wstringop-truncation warnings memcg: fix a crash in wb_workfn when a device disappears Fix unsynchronized access to sev members through svm_register_enc_region block: don't hold q->sysfs_lock in elevator_init_mq blk-mq: don't hold q->sysfs_lock in blk_mq_map_swqueue squashfs: add more sanity checks in id lookup squashfs: add more sanity checks in inode lookup squashfs: add more sanity checks in xattr id lookup regulator: core: enable power when setting up constraints regulator: core: Clean enabling always-on regulators + their supplies regulator: Fix lockdep warning resolving supplies Linux 4.19.176 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I33c221717e4e5c3213a7a21a648933a013bb2753 |
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Steven Rostedt (VMware)
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a19749a5fb |
fgraph: Initialize tracing_graph_pause at task creation
commit 7e0a9220467dbcfdc5bc62825724f3e52e50ab31 upstream.
On some archs, the idle task can call into cpu_suspend(). The cpu_suspend()
will disable or pause function graph tracing, as there's some paths in
bringing down the CPU that can have issues with its return address being
modified. The task_struct structure has a "tracing_graph_pause" atomic
counter, that when set to something other than zero, the function graph
tracer will not modify the return address.
The problem is that the tracing_graph_pause counter is initialized when the
function graph tracer is enabled. This can corrupt the counter for the idle
task if it is suspended in these architectures.
CPU 1 CPU 2
----- -----
do_idle()
cpu_suspend()
pause_graph_tracing()
task_struct->tracing_graph_pause++ (0 -> 1)
start_graph_tracing()
for_each_online_cpu(cpu) {
ftrace_graph_init_idle_task(cpu)
task-struct->tracing_graph_pause = 0 (1 -> 0)
unpause_graph_tracing()
task_struct->tracing_graph_pause-- (0 -> -1)
The above should have gone from 1 to zero, and enabled function graph
tracing again. But instead, it is set to -1, which keeps it disabled.
There's no reason that the field tracing_graph_pause on the task_struct can
not be initialized at boot up.
Cc: stable@vger.kernel.org
Fixes:
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Abhijeet Dharmapurikar
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bca62a0ae5 |
sched/tune: Fix improper accounting of tasks
cgroup_migrate_execute() calls can_attach() and css_set_move_task()
separately without holding rq->lock.
The schedtune implementation breaks here, since can_attach() accounts
for the task move way before the group move is committed. If the task
sleeps right after can_attach(), the sleep is accounted towards the
previous group. This ends up in disparity of counts between group.
Consider this race:
TaskA is moved from root_grp to topapp_grp, root_grp's tasks = 1 and
topapp tasks =0 right before the move and TaskB is moving it.
On cpu X
TaskA runs
* cgroup_migrate_execute()
schedtune_can_attach()
root_grp.tasks--; topapp_grp.tasks++;
(root_grp.tasks = 0 and topapp_grp.tasks = 1)
*right at this moment context is switched and TaskA runs.
*TaskA sleeps
dequeue_task()
schedtune_dequeue_task()
schedtune_task_update
root_grp.tasks--; //TaskA has not really "switched" group, so it
decrements from the root_grp, however can_attach() has accounted
the task move and this leaves us with
root_grp.tasks = 0 (it is -ve value protected)
topapp.grp.tasks = 1
Now even if cpuX is idle (TaskA is long gone sleeping), its
topapp_grp.tasks continues to stay +ve and it is subject to topapp's
boost unnecessarily.
An easy way to fix this is to move the group change accounting in
attach() callback which gets called _after_ css_set_move_task(). Also
maintain the task's current idx in struct task_struct as it moves
between groups. The task's enqueue/dequeue is accounted towards the
cached idx value. In an event when the task dequeues just
before group changes, it gets subtracted from the old group, which is
correct because the task would have bumped up the old group's count. If
the task changes group while its running, the attach() callback has to
decrement from the old group and increment from the new group so that
the next dequeue will subtract from the new group. IOW the attach()
callback has to account only for running task but has to update the
cached index for both running and sleeping task.
The current uses task->on_rq != 0 check to determine whether a task
is queued on the runqueue or not. This is an incorrect check. Because
task->on_rq is set to TASK_ON_RQ_MIGRATING (value = 2) during
migration. Fix this by using task_on_rq_queued() to check if a task
is queued or not.
Change-Id: If412da5a239c18d9122cfad2be59b355c14c068f
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Co-developed-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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Pavankumar Kondeti
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37d63f2459 |
ANDROID: GKI: cpuset: add field for task affinity for cpusets
This updates the struct task_struct ABI to include a field for vendors
to support task affinity for cpusets.
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Bug: 148872640
Bug: 149816871
Change-Id: I6c2ec1d5e3d994e176926d94b9e0cc92418020cc
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit
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Ivaylo Georgiev
|
4c30d46517 |
Merge android-4.19.95 (5da1114) into msm-4.19
* refs/heads/tmp-5da1114:
Revert crypto changes from android-4.19.79-95
Revert "UPSTREAM: PM / wakeup updates"
Revert "ANDROID: of: property: Enable of_devlink by default"
Revert "UPSTREAM: dt-bindings: arm: coresight: Add support for coresight-loses-context-with-cpu"
UPSTREAM: net: usbnet: Fix -Wcast-function-type
UPSTREAM: USB: dummy-hcd: use usb_urb_dir_in instead of usb_pipein
UPSTREAM: USB: dummy-hcd: increase max number of devices to 32
ANDROID: tty: serdev: Fix broken serial console input
ANDROID: update kernel ABI (perf_event changes)
BACKPORT: perf_event: Add support for LSM and SELinux checks
UPSTREAM: iommu: Allow io-pgtable to be used outside of drivers/iommu/
ANDROID: update abi for 4.19.94 release
ANDROID: update abi due to revert
Revert "BACKPORT: perf_event: Add support for LSM and SELinux checks"
UPSTREAM: selinux: sidtab reverse lookup hash table
UPSTREAM: selinux: avoid atomic_t usage in sidtab
UPSTREAM: selinux: check sidtab limit before adding a new entry
UPSTREAM: selinux: fix context string corruption in convert_context()
UPSTREAM: selinux: overhaul sidtab to fix bug and improve performance
UPSTREAM: selinux: refactor mls_context_to_sid() and make it stricter
UPSTREAM: selinux: use separate table for initial SID lookup
UPSTREAM: selinux: make "selinux_policycap_names[]" const char *
UPSTREAM: selinux: refactor sidtab conversion
ANDROID: Update ABI representation
ANDROID: GKI: clk: Don't disable unused clocks with sync state support
ANDROID: GKI: clk: Add support for clock providers with sync state
ANDROID: GKI: driver core: Add dev_has_sync_state()
ANDROID: update kernel ABI representation
BACKPORT: perf_event: Add support for LSM and SELinux checks
ANDROID: update ABI representation
UPSTREAM: exit: panic before exit_mm() on global init exit
ANDROID: serdev: Fix platform device support
ANDROID: Kconfig.gki: Add Hidden SPRD DRM configs
ANDROID: gki_defconfig: Disable TRANSPARENT_HUGEPAGE
ANDROID: gki_defconfig: Enable CONFIG_GNSS_CMDLINE_SERIAL
ANDROID: gnss: Add command line test driver
ANDROID: serdev: add platform device support
ANDROID: gki_defconfig: enable ARM64_SW_TTBR0_PAN
ANDROID: gki_defconfig: Set BINFMT_MISC as =m
UPSTREAM: binder: fix incorrect calculation for num_valid
ABI: Update ABI after f2fs merge
ANDROID: add initial ABI whitelist for android-4.19
ANDROID: staging: android: ion: Fix build when CONFIG_ION_SYSTEM_HEAP=n
ANDROID: staging: android: ion: Expose total heap and pool sizes via sysfs
ANDROID: Update ABI representation due to vmstat counter changes
UPSTREAM: include/linux/slab.h: fix sparse warning in kmalloc_type()
UPSTREAM: mm, slab: shorten kmalloc cache names for large sizes
UPSTREAM: mm, proc: add KReclaimable to /proc/meminfo
UPSTREAM: mm: rename and change semantics of nr_indirectly_reclaimable_bytes
UPSTREAM: dcache: allocate external names from reclaimable kmalloc caches
UPSTREAM: mm, slab/slub: introduce kmalloc-reclaimable caches
UPSTREAM: mm, slab: combine kmalloc_caches and kmalloc_dma_caches
ANDROID: abi update for 4.19.89
ANDROID: update abi_gki_aarch64.xml for LTO, CFI, and SCS
ANDROID: gki_defconfig: enable LTO, CFI, and SCS
ANDROID: update abi_gki_aarch64.xml for CONFIG_GNSS
ANDROID: cuttlefish_defconfig: Enable CONFIG_GNSS
UPSTREAM: arm64: Validate tagged addresses in access_ok() called from kernel threads
ANDROID: mm: Throttle rss_stat tracepoint
UPSTREAM: mm: slub: really fix slab walking for init_on_free
ANDROID: update abi_gki_aarch64.xml for nf change
ANDROID: kbuild: limit LTO inlining
ANDROID: kbuild: merge module sections with LTO
ANDROID: netfilter: nf_nat: remove static from nf_nat_ipv4_fn
UPSTREAM: drm/client: remove the exporting of drm_client_close
ANDROID: f2fs: fix possible merge of unencrypted with encrypted I/O
UPSTREAM: binder: Add binder_proc logging to binderfs
UPSTREAM: binder: Make transaction_log available in binderfs
UPSTREAM: binder: Add stats, state and transactions files
UPSTREAM: binder: add a mount option to show global stats
UPSTREAM: binder: Validate the default binderfs device names.
UPSTREAM: binder: Add default binder devices through binderfs when configured
UPSTREAM: binder: fix CONFIG_ANDROID_BINDER_DEVICES
UPSTREAM: android: binder: use kstrdup instead of open-coding it
UPSTREAM: binderfs: remove separate device_initcall()
UPSTREAM: binderfs: respect limit on binder control creation
UPSTREAM: binderfs: switch from d_add() to d_instantiate()
UPSTREAM: binderfs: drop lock in binderfs_binder_ctl_create
UPSTREAM: binderfs: kill_litter_super() before cleanup
UPSTREAM: binderfs: rework binderfs_binder_device_create()
UPSTREAM: binderfs: rework binderfs_fill_super()
UPSTREAM: binderfs: prevent renaming the control dentry
UPSTREAM: binderfs: remove outdated comment
UPSTREAM: binderfs: fix error return code in binderfs_fill_super()
UPSTREAM: binderfs: handle !CONFIG_IPC_NS builds
UPSTREAM: binderfs: reserve devices for initial mount
UPSTREAM: binderfs: rename header to binderfs.h
UPSTREAM: binderfs: implement "max" mount option
UPSTREAM: binderfs: make each binderfs mount a new instance
UPSTREAM: binderfs: remove wrong kern_mount() call
UPSTREAM: binder: implement binderfs
UPSTREAM: binder: remove BINDER_DEBUG_ENTRY()
ANDROID: Don't base allmodconfig on gki_defconfig
ANDROID: Disable UNWINDER_ORC for allmodconfig
ANDROID: update abi_gki_aarch64.xml for 4.19.87
BACKPORT: ARM: 8905/1: Emit __gnu_mcount_nc when using Clang 10.0.0 or newer
ANDROID: update abi_gki_aarch64.xml
ANDROID: gki_defconfig: =m's applied for virtio configs in arm64
UPSTREAM: of: property: Add device link support for interrupt-parent, dmas and -gpio(s)
UPSTREAM: of: property: Add device link support for "iommu-map"
UPSTREAM: of: property: Fix the semantics of of_is_ancestor_of()
UPSTREAM: i2c: of: Populate fwnode in of_i2c_get_board_info()
UPSTREAM: driver core: Clarify documentation for fwnode_operations.add_links()
UPSTREAM: dt-bindings: arm: coresight: Add support for coresight-loses-context-with-cpu
BACKPORT: coresight: etm4x: Save/restore state across CPU low power states
ANDROID: Update ABI representation
ANDROID: gki_defconfig: IIO=y
f2fs: stop GC when the victim becomes fully valid
f2fs: expose main_blkaddr in sysfs
f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()
f2fs: Fix deadlock in f2fs_gc() context during atomic files handling
f2fs: show f2fs instance in printk_ratelimited
f2fs: fix potential overflow
f2fs: fix to update dir's i_pino during cross_rename
f2fs: support aligned pinned file
f2fs: avoid kernel panic on corruption test
f2fs: fix wrong description in document
f2fs: cache global IPU bio
f2fs: fix to avoid memory leakage in f2fs_listxattr
f2fs: check total_segments from devices in raw_super
f2fs: update multi-dev metadata in resize_fs
f2fs: mark recovery flag correctly in read_raw_super_block()
f2fs: fix to update time in lazytime mode
vfs: don't allow writes to swap files
mm: set S_SWAPFILE on blockdev swap devices
BACKPORT: ARM: 8900/1: UNWINDER_FRAME_POINTER implementation for Clang
ANDROID: update abi_gki_aarch64.xml for 4.19.87
ANDROID: gki_defconfig: FW_CACHE to no
FROMGIT: firmware_class: make firmware caching configurable
FROMLIST: arm64: implement Shadow Call Stack
FROMLIST: arm64: disable SCS for hypervisor code
BACKPORT: FROMLIST: arm64: vdso: disable Shadow Call Stack
FROMLIST: arm64: efi: restore x18 if it was corrupted
FROMLIST: arm64: preserve x18 when CPU is suspended
FROMLIST: arm64: reserve x18 from general allocation with SCS
FROMLIST: arm64: disable function graph tracing with SCS
FROMLIST: scs: add support for stack usage debugging
FROMLIST: scs: add accounting
FROMLIST: add support for Clang's Shadow Call Stack (SCS)
FROMLIST: arm64: kernel: avoid x18 in __cpu_soft_restart
FROMLIST: arm64: kvm: stop treating register x18 as caller save
FROMLIST: arm64/lib: copy_page: avoid x18 register in assembler code
FROMLIST: arm64: mm: avoid x18 in idmap_kpti_install_ng_mappings
ANDROID: use non-canonical CFI jump tables
ANDROID: arm64: add __nocfi to __apply_alternatives
ANDROID: arm64: add __pa_function
ANDROID: arm64: allow ThinLTO to be selected
ANDROID: soc/tegra: disable ARCH_TEGRA_210_SOC with LTO
FROMLIST: arm64: fix alternatives with LLVM's integrated assembler
ANDROID: irqchip/gic-v3: rename gic_of_init to work around a ThinLTO+CFI bug
ANDROID: init: ensure initcall ordering with LTO
Revert "ANDROID: init: ensure initcall ordering with LTO"
ANDROID: add support for ThinLTO
ANDROID: clang: update to 10.0.1
ANDROID: gki_defconfig: enable CONFIG_REGULATOR_FIXED_VOLTAGE
ANDROID: gki_defconfig: removed CONFIG_PM_WAKELOCKS
ANDROID: gki_defconfig: enable CONFIG_IKHEADERS as m
FROMGIT: pinctrl: devicetree: Avoid taking direct reference to device name string
ANDROID: update abi_gki_aarch64.xml for 4.19.86 update
ANDROID: Update ABI representation
ANDROID: gki_defconfig: disable FUNCTION_TRACER
ANDROID: Update the ABI representation
ANDROID: update ABI representation
ANDROID: add unstripped modules to the distribution
FROMLIST: vsprintf: Inline call to ptr_to_hashval
UPSTREAM: rss_stat: Add support to detect RSS updates of external mm
UPSTREAM: mm: emit tracepoint when RSS changes
FROMGIT: driver core: Allow device link operations inside sync_state()
ANDROID: uid_sys_stats: avoid double accounting of dying threads
ANDROID: scsi: ufs-qcom: Enable BROKEN_CRYPTO quirk flag
ANDROID: scsi: ufs-hisi: Enable BROKEN_CRYPTO quirk flag
ANDROID: scsi: ufs: Add quirk bit for controllers that don't play well with inline crypto
ANDROID: scsi: ufs: UFS init should not require inline crypto
ANDROID: scsi: ufs: UFS crypto variant operations API
ANDROID: gki_defconfig: enable inline encryption
BACKPORT: FROMLIST: ext4: add inline encryption support
BACKPORT: FROMLIST: f2fs: add inline encryption support
BACKPORT: FROMLIST: fscrypt: add inline encryption support
BACKPORT: FROMLIST: scsi: ufs: Add inline encryption support to UFS
BACKPORT: FROMLIST: scsi: ufs: UFS crypto API
BACKPORT: FROMLIST: scsi: ufs: UFS driver v2.1 spec crypto additions
BACKPORT: FROMLIST: block: blk-crypto for Inline Encryption
ANDROID: block: Fix bio_crypt_should_process WARN_ON
BACKPORT: FROMLIST: block: Add encryption context to struct bio
BACKPORT: FROMLIST: block: Keyslot Manager for Inline Encryption
FROMLIST: f2fs: add support for IV_INO_LBLK_64 encryption policies
FROMLIST: ext4: add support for IV_INO_LBLK_64 encryption policies
BACKPORT: FROMLIST: fscrypt: add support for IV_INO_LBLK_64 policies
FROMLIST: fscrypt: zeroize fscrypt_info before freeing
FROMLIST: fscrypt: remove struct fscrypt_ctx
BACKPORT: FROMLIST: fscrypt: invoke crypto API for ESSIV handling
ANDROID: build kernels with llvm-nm and llvm-objcopy
ANDROID: Fix allmodconfig build with CC=clang
UPSTREAM: mm/page_poison: expose page_poisoning_enabled to kernel modules
FROMGIT: of: property: Add device link support for iommus, mboxes and io-channels
FROMGIT: of: property: Make it easy to add device links from DT properties
FROMGIT: of: property: Minor style clean up of of_link_to_phandle()
Revert "ANDROID: of/property: Add device link support for iommus"
ANDROID: Add allmodconfig build.configs for x86_64 and aarch64
ANDROID: fix allmodconfig build
ANDROID: nf: IDLETIMER: Fix possible use before initialization in idletimer_resume
BACKPORT: coresight: funnel: Support static funnel
BACKPORT:FROMGIT: coresight: replicator: Fix missing spin_lock_init()
BACKPORT:FROMGIT: coresight: funnel: Fix missing spin_lock_init()
BACKPORT:FROMGIT: coresight: Serialize enabling/disabling a link device.
UPSTREAM: coresight: tmc-etr: Add barrier packets when moving offset forward
UPSTREAM: coresight: tmc-etr: Decouple buffer sync and barrier packet insertion
UPSTREAM: coresight: tmc: Make memory width mask computation into a function
UPSTREAM: coresight: tmc-etr: Fix perf_data check
UPSTREAM: coresight: tmc-etr: Fix updating buffer in not-snapshot mode.
UPSTREAM: coresight: tmc-etr: Check if non-secure access is enabled
UPSTREAM: coresight: tmc-etr: Handle memory errors
BACKPORT: coresight: etr_buf: Consolidate refcount initialization
UPSTREAM: coresight: Fix DEBUG_LOCKS_WARN_ON for uninitialized attribute
UPSTREAM: coresight: Use coresight device names for sinks in PMU attribute
UPSTREAM: coresight: tmc-etr: alloc_perf_buf: Do not call smp_processor_id from preemptible
UPSTREAM: coresight: tmc-etr: Do not call smp_processor_id() from preemptible
UPSTREAM: coresight: perf: Don't set the truncated flag in snapshot mode
UPSTREAM: coresight: tmc-etf: Fix snapshot mode update function
UPSTREAM: coresight: tmc-etr: Properly set AUX buffer head in snapshot mode
UPSTREAM: coresight: tmc-etr: Add support for CPU-wide trace scenarios
UPSTREAM: coresight: tmc-etr: Allocate and free ETR memory buffers for CPU-wide scenarios
UPSTREAM: coresight: tmc-etr: Introduce the notion of IDR to ETR devices
UPSTREAM: coresight: tmc-etr: Introduce the notion of reference counting to ETR devices
UPSTREAM: coresight: tmc-etr: Introduce the notion of process ID to ETR devices
UPSTREAM: coresight: tmc-etr: Create per-thread buffer allocation function
UPSTREAM: coresight: tmc-etr: Refactor function tmc_etr_setup_perf_buf()
UPSTREAM: coresight: Communicate perf event to sink buffer allocation functions
UPSTREAM: coresight: perf: Refactor function free_event_data()
UPSTREAM: coresight: perf: Clean up function etm_setup_aux()
UPSTREAM: coresight: Properly address concurrency in sink::update() functions
UPSTREAM: coresight: Properly address errors in sink::disable() functions
UPSTREAM: coresight: Move reference counting inside sink drivers
UPSTREAM: coresight: Adding return code to sink::disable() operation
UPSTREAM: coresight: etm4x: Configure tracers to emit timestamps
UPSTREAM: coresight: etm4x: Skip selector pair 0
UPSTREAM: coresight: etm4x: Add kernel configuration for CONTEXTID
UPSTREAM: coresight: pmu: Adding ITRACE property to cs_etm PMU
UPSTREAM: coresight: tmc: Cleanup power management
UPSTREAM: coresight: Fix freeing up the coresight connections
UPSTREAM: coresight: tmc: Report DMA setup failures
UPSTREAM: coresight: catu: fix clang build warning
UPSTREAM: perf/core: Fix the address filtering fix
UPSTREAM: perf, pt, coresight: Fix address filters for vmas with non-zero offset
UPSTREAM: perf: Copy parent's address filter offsets on clone
UPSTREAM: coresight: Use event attributes for sink selection
UPSTREAM: coresight: perf: Add "sinks" group to PMU directory
UPSTREAM: coresight: etb10: Add support for CLAIM tag
UPSTREAM: coreisght: tmc: Claim device before use
UPSTREAM: coresight: dynamic-replicator: Claim device for use
UPSTREAM: coresight: funnel: Claim devices before use
UPSTREAM: coresight: etmx: Claim devices before use
UPSTREAM: coresight: Add support for CLAIM tag protocol
UPSTREAM: coresight: dynamic-replicator: Handle multiple connections
UPSTREAM: coresight: etb10: Handle errors enabling the device
UPSTREAM: coresight: etm3: Add support for handling errors
UPSTREAM: coresight: etm4x: Add support for handling errors
UPSTREAM: coresight: tmc-etb/etf: Prepare to handle errors enabling
UPSTREAM: coresight: tmc-etr: Handle errors enabling CATU
UPSTREAM: coresight: tmc-etr: Refactor for handling errors
UPSTREAM: coresight: Handle failures in enabling a trace path
UPSTREAM: coresight: tmc: Fix byte-address alignment for RRP
UPSTREAM: coresight: etm4x: Configure EL2 exception level when kernel is running in HYP
UPSTREAM: coresight: etb10: Splitting function etb_enable()
UPSTREAM: coresight: etb10: Refactor etb_drvdata::mode handling
UPSTREAM: coresight: etm-perf: Add support for ETR backend
UPSTREAM: coresight: perf: Remove set_buffer call back
UPSTREAM: coresight: perf: Add helper to retrieve sink configuration
UPSTREAM: coresight: perf: Remove reset_buffer call back for sinks
UPSTREAM: coresight: Convert driver messages to dev_dbg
UPSTREAM: coresight: tmc-etr: Relax collection of trace from sysfs mode
UPSTREAM: coresight: tmc-etr: Handle driver mode specific ETR buffers
UPSTREAM: coresight: perf: Disable trace path upon source error
UPSTREAM: coresight: perf: Allow tracing on hotplugged CPUs
UPSTREAM: coresight: perf: Avoid unncessary CPU hotplug read lock
UPSTREAM: coresight: perf: Fix per cpu path management
UPSTREAM: coresight: Fix handling of sinks
UPSTREAM: coresight: Use ERR_CAST instead of ERR_PTR
UPSTREAM: coresight: Fix remote endpoint parsing
UPSTREAM: coresight: platform: Fix leaking device reference
UPSTREAM: coresight: platform: Fix refcounting for graph nodes
UPSTREAM: coresight: platform: Refactor graph endpoint parsing
UPSTREAM: coresight: Document error handling in coresight_register
ANDROID: regression introduced override_creds=off
ANDROID: overlayfs: internal getxattr operations without sepolicy checking
ANDROID: overlayfs: add __get xattr method
ANDROID: Add optional __get xattr method paired to __vfs_getxattr
UPSTREAM: scsi: ufs: override auto suspend tunables for ufs
UPSTREAM: scsi: core: allow auto suspend override by low-level driver
FROMGIT: of: property: Skip adding device links to suppliers that aren't devices
ANDROID: gki_defconfig: enable CONFIG_KEYBOARD_GPIO
UPSTREAM: dm bufio: introduce a global cache replacement
UPSTREAM: dm bufio: remove old-style buffer cleanup
UPSTREAM: dm bufio: introduce a global queue
UPSTREAM: dm bufio: refactor adjust_total_allocated
UPSTREAM: dm bufio: call adjust_total_allocated from __link_buffer and __unlink_buffer
ANDROID: dummy_cpufreq: Implement get()
ANDROID: gki_defconfig: enable CONFIG_CPUSETS
ANDROID: virtio: virtio_input: Set the amount of multitouch slots in virtio input
rtlwifi: Fix potential overflow on P2P code
ANDROID: cpufreq: create dummy cpufreq driver
ANDROID: Allow DRM_IOCTL_MODE_*_DUMB for render clients.
Cuttlefish Wifi: Add data ops in virt_wifi driver for scan data simulation
ANDROID: of: property: Enable of_devlink by default
ANDROID: of: property: Make sure child dependencies don't block probing of parent
ANDROID: driver core: Allow fwnode_operations.add_links to differentiate errors
ANDROID: driver core: Allow a device to wait on optional suppliers
ANDROID: driver core: Add device link support for SYNC_STATE_ONLY flag
FROMGIT: docs: driver-model: Add documentation for sync_state
FROMGIT: driver: core: Improve documentation for fwnode_operations.add_links()
FROMGIT: of: property: Minor code formatting/style clean ups
ANDROID: of/property: Add device link support for iommus
ANDROID: move up spin_unlock_bh() ahead of remove_proc_entry()
BACKPORT: arm64: tags: Preserve tags for addresses translated via TTBR1
UPSTREAM: arm64: memory: Implement __tag_set() as common function
UPSTREAM: arm64/mm: fix variable 'tag' set but not used
UPSTREAM: arm64: avoid clang warning about self-assignment
ANDROID: sdcardfs: evict dentries on fscrypt key removal
ANDROID: fscrypt: add key removal notifier chain
ANDROID: refactor build.config files to remove duplication
ANDROID: Move from clang r353983c to r365631c
ANDROID: gki_defconfig: remove PWRSEQ_EMMC and PWRSEQ_SIMPLE
ANDROID: unconditionally compile sig_ok in struct module
ANDROID: gki_defconfig: enable fs-verity
UPSTREAM: mm: vmalloc: show number of vmalloc pages in /proc/meminfo
BACKPORT: PM/sleep: Expose suspend stats in sysfs
UPSTREAM: power: supply: Init device wakeup after device_add()
UPSTREAM: PM / wakeup: Unexport wakeup_source_sysfs_{add,remove}()
UPSTREAM: PM / wakeup: Register wakeup class kobj after device is added
UPSTREAM: PM / wakeup: Fix sysfs registration error path
UPSTREAM: PM / wakeup: Show wakeup sources stats in sysfs
UPSTREAM: PM / wakeup: Use wakeup_source_register() in wakelock.c
UPSTREAM: PM / wakeup: Drop wakeup_source_init(), wakeup_source_prepare()
UPSTREAM: PM / wakeup: Drop wakeup_source_drop()
UPSTREAM: PM / core: Add support to skip power management in device/driver model
gki_defconfig: Enable CONFIG_DM_SNAPSHOT
ANDROID: gki_defconfig: enable accelerated AES and SHA-256
ANDROID: fix overflow in /proc/uid_cputime/remove_uid_range
ANDROID: kasan: fix has_attribute check on older GCC versions
ANDROID: gki_defconfig: enable CONFIG_PARAVIRT and CONFIG_HYPERVISOR_GUEST
ANDROID: gki_defconfig: enable CONFIG_NLS_*
ANDROID: gki_defconfig: Enable BPF_JIT and BPF_JIT_ALWAYS_ON
FROMGIT: of: property: Create device links for all child-supplier depencencies
FROMGIT: of/platform: Pause/resume sync state during init and of_platform_populate()
BACKPORT: FROMGIT: driver core: Add sync_state driver/bus callback
BACKPORT: FROMGIT: of: property: Add functional dependency link from DT bindings
FROMGIT: driver core: Add support for linking devices during device addition
FROMGIT: driver core: Add fwnode_to_dev() to look up device from fwnode
UPSTREAM: mm: untag user pointers in mmap/munmap/mremap/brk
UPSTREAM: vfio/type1: untag user pointers in vaddr_get_pfn
UPSTREAM: tee/shm: untag user pointers in tee_shm_register
UPSTREAM: media/v4l2-core: untag user pointers in videobuf_dma_contig_user_get
UPSTREAM: drm/radeon: untag user pointers in radeon_gem_userptr_ioctl
BACKPORT: drm/amdgpu: untag user pointers
UPSTREAM: userfaultfd: untag user pointers
UPSTREAM: fs/namespace: untag user pointers in copy_mount_options
UPSTREAM: mm: untag user pointers in get_vaddr_frames
UPSTREAM: mm: untag user pointers in mm/gup.c
UPSTREAM: mm: untag user pointers passed to memory syscalls
BACKPORT: lib: untag user pointers in strn*_user
UPSTREAM: arm64: Fix reference to docs for ARM64_TAGGED_ADDR_ABI
UPSTREAM: selftests, arm64: add kernel headers path for tags_test
BACKPORT: arm64: Relax Documentation/arm64/tagged-pointers.rst
UPSTREAM: arm64: Define Documentation/arm64/tagged-address-abi.rst
UPSTREAM: arm64: Change the tagged_addr sysctl control semantics to only prevent the opt-in
UPSTREAM: arm64: Tighten the PR_{SET, GET}_TAGGED_ADDR_CTRL prctl() unused arguments
UPSTREAM: selftests, arm64: fix uninitialized symbol in tags_test.c
UPSTREAM: arm64: mm: Really fix sparse warning in untagged_addr()
UPSTREAM: selftests, arm64: add a selftest for passing tagged pointers to kernel
BACKPORT: arm64: Introduce prctl() options to control the tagged user addresses ABI
UPSTREAM: arm64: untag user pointers in access_ok and __uaccess_mask_ptr
UPSTREAM: uaccess: add noop untagged_addr definition
BACKPORT: block: annotate refault stalls from IO submission
f2fs: add a condition to detect overflow in f2fs_ioc_gc_range()
f2fs: fix to add missing F2FS_IO_ALIGNED() condition
f2fs: fix to fallback to buffered IO in IO aligned mode
f2fs: fix to handle error path correctly in f2fs_map_blocks
f2fs: fix extent corrupotion during directIO in LFS mode
f2fs: check all the data segments against all node ones
f2fs: Add a small clarification to CONFIG_FS_F2FS_FS_SECURITY
f2fs: fix inode rwsem regression
f2fs: fix to avoid accessing uninitialized field of inode page in is_alive()
f2fs: avoid infinite GC loop due to stale atomic files
f2fs: Fix indefinite loop in f2fs_gc()
f2fs: convert inline_data in prior to i_size_write
f2fs: fix error path of f2fs_convert_inline_page()
f2fs: add missing documents of reserve_root/resuid/resgid
f2fs: fix flushing node pages when checkpoint is disabled
f2fs: enhance f2fs_is_checkpoint_ready()'s readability
f2fs: clean up __bio_alloc()'s parameter
f2fs: fix wrong error injection path in inc_valid_block_count()
f2fs: fix to writeout dirty inode during node flush
f2fs: optimize case-insensitive lookups
f2fs: introduce f2fs_match_name() for cleanup
f2fs: Fix indefinite loop in f2fs_gc()
f2fs: allocate memory in batch in build_sit_info()
f2fs: support FS_IOC_{GET,SET}FSLABEL
f2fs: fix to avoid data corruption by forbidding SSR overwrite
f2fs: Fix build error while CONFIG_NLS=m
Revert "f2fs: avoid out-of-range memory access"
f2fs: cleanup the code in build_sit_entries.
f2fs: fix wrong available node count calculation
f2fs: remove duplicate code in f2fs_file_write_iter
f2fs: fix to migrate blocks correctly during defragment
f2fs: use wrapped f2fs_cp_error()
f2fs: fix to use more generic EOPNOTSUPP
f2fs: use wrapped IS_SWAPFILE()
f2fs: Support case-insensitive file name lookups
f2fs: include charset encoding information in the superblock
fs: Reserve flag for casefolding
f2fs: fix to avoid call kvfree under spinlock
fs: f2fs: Remove unnecessary checks of SM_I(sbi) in update_general_status()
f2fs: disallow direct IO in atomic write
f2fs: fix to handle quota_{on,off} correctly
f2fs: fix to detect cp error in f2fs_setxattr()
f2fs: fix to spread f2fs_is_checkpoint_ready()
f2fs: support fiemap() for directory inode
f2fs: fix to avoid discard command leak
f2fs: fix to avoid tagging SBI_QUOTA_NEED_REPAIR incorrectly
f2fs: fix to drop meta/node pages during umount
f2fs: disallow switching io_bits option during remount
f2fs: fix panic of IO alignment feature
f2fs: introduce {page,io}_is_mergeable() for readability
f2fs: fix livelock in swapfile writes
f2fs: add fs-verity support
ext4: update on-disk format documentation for fs-verity
ext4: add fs-verity read support
ext4: add basic fs-verity support
fs-verity: support builtin file signatures
fs-verity: add SHA-512 support
fs-verity: implement FS_IOC_MEASURE_VERITY ioctl
fs-verity: implement FS_IOC_ENABLE_VERITY ioctl
fs-verity: add data verification hooks for ->readpages()
fs-verity: add the hook for file ->setattr()
fs-verity: add the hook for file ->open()
fs-verity: add inode and superblock fields
fs-verity: add Kconfig and the helper functions for hashing
fs: uapi: define verity bit for FS_IOC_GETFLAGS
fs-verity: add UAPI header
fs-verity: add MAINTAINERS file entry
fs-verity: add a documentation file
ext4: fix kernel oops caused by spurious casefold flag
ext4: fix coverity warning on error path of filename setup
ext4: optimize case-insensitive lookups
ext4: fix dcache lookup of !casefolded directories
unicode: update to Unicode 12.1.0 final
unicode: add missing check for an error return from utf8lookup()
ext4: export /sys/fs/ext4/feature/casefold if Unicode support is present
unicode: refactor the rule for regenerating utf8data.h
ext4: Support case-insensitive file name lookups
ext4: include charset encoding information in the superblock
unicode: update unicode database unicode version 12.1.0
unicode: introduce test module for normalized utf8 implementation
unicode: implement higher level API for string handling
unicode: reduce the size of utf8data[]
unicode: introduce code for UTF-8 normalization
unicode: introduce UTF-8 character database
ext4 crypto: fix to check feature status before get policy
fscrypt: document the new ioctls and policy version
ubifs: wire up new fscrypt ioctls
f2fs: wire up new fscrypt ioctls
ext4: wire up new fscrypt ioctls
fscrypt: require that key be added when setting a v2 encryption policy
fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl
fscrypt: allow unprivileged users to add/remove keys for v2 policies
fscrypt: v2 encryption policy support
fscrypt: add an HKDF-SHA512 implementation
fscrypt: add FS_IOC_GET_ENCRYPTION_KEY_STATUS ioctl
fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY ioctl
fscrypt: add FS_IOC_ADD_ENCRYPTION_KEY ioctl
fscrypt: rename keyinfo.c to keysetup.c
fscrypt: move v1 policy key setup to keysetup_v1.c
fscrypt: refactor key setup code in preparation for v2 policies
fscrypt: rename fscrypt_master_key to fscrypt_direct_key
fscrypt: add ->ci_inode to fscrypt_info
fscrypt: use FSCRYPT_* definitions, not FS_*
fscrypt: use FSCRYPT_ prefix for uapi constants
fs, fscrypt: move uapi definitions to new header <linux/fscrypt.h>
fscrypt: use ENOPKG when crypto API support missing
fscrypt: improve warnings for missing crypto API support
fscrypt: improve warning messages for unsupported encryption contexts
fscrypt: make fscrypt_msg() take inode instead of super_block
fscrypt: clean up base64 encoding/decoding
fscrypt: remove loadable module related code
Updated following files to fix build errors:
drivers/gpu/msm/kgsl_pool.c
drivers/hwtracing/coresight/coresight-dummy.c
drivers/iommu/dma-mapping-fast.c
drivers/iommu/io-pgtable-fast.c
drivers/iommu/io-pgtable-msm-secure.c
kernel/taskstats.c
mm/vmalloc.c
security/selinux/ss/sidtab.h
Conflicts:
arch/arm/Makefile
arch/arm64/Kconfig
arch/x86/include/asm/syscall_wrapper.h
build.config.common
drivers/clk/clk.c
drivers/hwtracing/coresight/coresight-etm-perf.c
drivers/hwtracing/coresight/coresight-funnel.c
drivers/hwtracing/coresight/coresight-tmc-etf.c
drivers/hwtracing/coresight/coresight-tmc-etr.c
drivers/hwtracing/coresight/coresight-tmc.c
drivers/hwtracing/coresight/coresight-tmc.h
drivers/hwtracing/coresight/coresight.c
drivers/hwtracing/coresight/of_coresight.c
drivers/iommu/arm-smmu.c
drivers/iommu/io-pgtable-arm.c
drivers/iommu/io-pgtable.c
drivers/scsi/scsi_sysfs.c
drivers/scsi/sd.c
drivers/scsi/ufs/ufshcd.c
drivers/scsi/ufs/ufshcd.h
drivers/staging/android/ion/ion.c
drivers/staging/android/ion/ion.h
drivers/staging/android/ion/ion_page_pool.c
fs/ext4/readpage.c
fs/f2fs/data.c
fs/f2fs/f2fs.h
fs/f2fs/file.c
fs/f2fs/segment.c
fs/f2fs/super.c
include/linux/clk-provider.h
include/linux/compiler_types.h
include/linux/coresight.h
include/linux/mmzone.h
include/scsi/scsi_device.h
include/trace/events/kmem.h
kernel/events/core.c
kernel/sched/core.c
mm/vmstat.c
Change-Id: I2eca52b08b484f2b5c30437671cab8cb0195b8d6
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>
|
||
|
Sami Tolvanen
|
16e13c60ff |
FROMLIST: add support for Clang's Shadow Call Stack (SCS)
This change adds generic support for Clang's Shadow Call Stack, which uses a shadow stack to protect return addresses from being overwritten by an attacker. Details are available here: https://clang.llvm.org/docs/ShadowCallStack.html Note that security guarantees in the kernel differ from the ones documented for user space. The kernel must store addresses of shadow stacks used by other tasks and interrupt handlers in memory, which means an attacker capable reading and writing arbitrary memory may be able to locate them and hijack control flow by modifying shadow stacks that are not currently in use. Bug: 145210207 Change-Id: Ia5f1650593fa95da4efcf86f84830a20989f161c (am from https://lore.kernel.org/patchwork/patch/1149054/) Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> |
||
|
Pavankumar Kondeti
|
b4fee475f8 |
cpuset: Restore tasks affinity while moving across cpusets
When tasks move across cpusets, the current affinity settings are lost. Cache the task affinity and restore it during cpuset migration. The restoring happens only when the cached affinity is subset of the current cpuset settings. Change-Id: I6c2ec1d5e3d994e176926d94b9e0cc92418020cc Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org> |
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|
Eric W. Biederman
|
c3ad2c3b02 |
signal: Don't restart fork when signals come in.
Wen Yang <wen.yang99@zte.com.cn> and majiang <ma.jiang@zte.com.cn>
report that a periodic signal received during fork can cause fork to
continually restart preventing an application from making progress.
The code was being overly pessimistic. Fork needs to guarantee that a
signal sent to multiple processes is logically delivered before the
fork and just to the forking process or logically delivered after the
fork to both the forking process and it's newly spawned child. For
signals like periodic timers that are always delivered to a single
process fork can safely complete and let them appear to logically
delivered after the fork().
While examining this issue I also discovered that fork today will miss
signals delivered to multiple processes during the fork and handled by
another thread. Similarly the current code will also miss blocked
signals that are delivered to multiple process, as those signals will
not appear pending during fork.
Add a list of each thread that is currently forking, and keep on that
list a signal set that records all of the signals sent to multiple
processes. When fork completes initialize the new processes
shared_pending signal set with it. The calculate_sigpending function
will see those signals and set TIF_SIGPENDING causing the new task to
take the slow path to userspace to handle those signals. Making it
appear as if those signals were received immediately after the fork.
It is not possible to send real time signals to multiple processes and
exceptions don't go to multiple processes, which means that that are
no signals sent to multiple processes that require siginfo. This
means it is safe to not bother collecting siginfo on signals sent
during fork.
The sigaction of a child of fork is initially the same as the
sigaction of the parent process. So a signal the parent ignores the
child will also initially ignore. Therefore it is safe to ignore
signals sent to multiple processes and ignored by the forking process.
Signals sent to only a single process or only a single thread and delivered
during fork are treated as if they are received after the fork, and generally
not dealt with. They won't cause any problems.
V2: Added removal from the multiprocess list on failure.
V3: Use -ERESTARTNOINTR directly
V4: - Don't queue both SIGCONT and SIGSTOP
- Initialize signal_struct.multiprocess in init_task
- Move setting of shared_pending to before the new task
is visible to signals. This prevents signals from comming
in before shared_pending.signal is set to delayed.signal
and being lost.
V5: - rework list add and delete to account for idle threads
v6: - Use sigdelsetmask when removing stop signals
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200447
Reported-by: Wen Yang <wen.yang99@zte.com.cn> and
Reported-by: majiang <ma.jiang@zte.com.cn>
Fixes:
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||
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Eric W. Biederman
|
6883f81aac |
pid: Implement PIDTYPE_TGID
Everywhere except in the pid array we distinguish between a tasks pid and a tasks tgid (thread group id). Even in the enumeration we want that distinction sometimes so we have added __PIDTYPE_TGID. With leader_pid we almost have an implementation of PIDTYPE_TGID in struct signal_struct. Add PIDTYPE_TGID as a first class member of the pid_type enumeration and into the pids array. Then remove the __PIDTYPE_TGID special case and the leader_pid in signal_struct. The net size increase is just an extra pointer added to struct pid and an extra pair of pointers of an hlist_node added to task_struct. The effect on code maintenance is the removal of a number of special cases today and the potential to remove many more special cases as PIDTYPE_TGID gets used to it's fullest. The long term potential is allowing zombie thread group leaders to exit, which will remove a lot more special cases in the code. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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Eric W. Biederman
|
2c4704756c |
pids: Move the pgrp and session pid pointers from task_struct to signal_struct
To access these fields the code always has to go to group leader so going to signal struct is no loss and is actually a fundamental simplification. This saves a little bit of memory by only allocating the pid pointer array once instead of once for every thread, and even better this removes a few potential races caused by the fact that group_leader can be changed by de_thread, while signal_struct can not. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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Eric W. Biederman
|
2896b0f09f |
pids: Initialize leader_pid in init_task
This is cheap and no cost so we might as well. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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Richard Guy Briggs
|
f0b752168d |
audit: convert sessionid unset to a macro
Use a macro, "AUDIT_SID_UNSET", to replace each instance of initialization and comparison to an audit session ID. Signed-off-by: Richard Guy Briggs <rgb@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com> |
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David Howells
|
3678e2fcc2 |
Expand the INIT_SIGNALS and INIT_SIGHAND macros and remove
There doesn't seem to be any need to have the INIT_SIGNALS and INIT_SIGHAND macros, so expand them in their single places of use and remove them. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> Tested-by: Will Deacon <will.deacon@arm.com> (arm64) Tested-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> |
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David Howells
|
4e7e3adbba |
Expand various INIT_* macros and remove
Expand various INIT_* macros into the single places they're used in init/init_task.c and remove them. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> Tested-by: Will Deacon <will.deacon@arm.com> (arm64) Tested-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> |
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David Howells
|
d11ed3ab31 |
Expand INIT_TASK() in init/init_task.c and remove
It's no longer necessary to have an INIT_TASK() macro, and this can be expanded into the one place it is now used and removed. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> Tested-by: Will Deacon <will.deacon@arm.com> (arm64) Tested-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> |
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David Howells
|
0500871f21 |
Construct init thread stack in the linker script rather than by union
Construct the init thread stack in the linker script rather than doing it by means of a union so that ia64's init_task.c can be got rid of. The following symbols are then made available from INIT_TASK_DATA() linker script macro: init_thread_union init_stack INIT_TASK_DATA() also expands the region to THREAD_SIZE to accommodate the size of the init stack. init_thread_union is given its own section so that it can be placed into the stack space in the right order. I'm assuming that the ia64 ordering is correct and that the task_struct is first and the thread_info second. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com> Tested-by: Will Deacon <will.deacon@arm.com> (arm64) Tested-by: Palmer Dabbelt <palmer@sifive.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> |
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Greg Kroah-Hartman
|
b24413180f |
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Ingo Molnar
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9164bb4a18 |
sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>
Update all usage sites first. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Linus Torvalds
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7c0f6ba682 |
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
This was entirely automated, using the script by Al:
PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
$(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)
to do the replacement at the end of the merge window.
Requested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Andy Lutomirski
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c65eacbe29 |
sched/core: Allow putting thread_info into task_struct
If an arch opts in by setting CONFIG_THREAD_INFO_IN_TASK_STRUCT, then thread_info is defined as a single 'u32 flags' and is the first entry of task_struct. thread_info::task is removed (it serves no purpose if thread_info is embedded in task_struct), and thread_info::cpu gets its own slot in task_struct. This is heavily based on a patch written by Linus. Originally-from: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jann Horn <jann@thejh.net> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/a0898196f0476195ca02713691a5037a14f2aac5.1473801993.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Clark Williams
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8bd75c77b7 |
sched/rt: Move rt specific bits into new header file
Move rt scheduler definitions out of include/linux/sched.h into new file include/linux/sched/rt.h Signed-off-by: Clark Williams <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094707.7b9f825f@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Clark Williams
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cf4aebc292 |
sched: Move sched.h sysctl bits into separate header
Move the sysctl-related bits from include/linux/sched.h into a new file: include/linux/sched/sysctl.h. Then update source files requiring access to those bits by including the new header file. Signed-off-by: Clark Williams <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094659.06dced96@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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Thomas Gleixner
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a4a2eb490e |
init_task: Create generic init_task instance
All archs define init_task in the same way (except ia64, but there is no particular reason why ia64 cannot use the common version). Create a generic instance so all archs can be converted over. The config switch is temporary and will be removed when all archs are converted over. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Chris Zankel <chris@zankel.net> Cc: David Howells <dhowells@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: James E.J. Bottomley <jejb@parisc-linux.org> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Mark Salter <msalter@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@arm.linux.org.uk> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20120503085034.092585287@linutronix.de |