Steven Rostedt (Google)
e65ac2bdda
tracing/ring-buffer: Have polling block on watermark ...
commit 42fb0a1e84ff525ebe560e2baf9451ab69127e2b upstream.
Currently the way polling works on the ring buffer is broken. It will
return immediately if there's any data in the ring buffer whereas a read
will block until the watermark (defined by the tracefs buffer_percent file)
is hit.
That is, a select() or poll() will return as if there's data available,
but then the following read will block. This is broken for the way
select()s and poll()s are supposed to work.
Have the polling on the ring buffer also block the same way reads and
splice does on the ring buffer.
Link: https://lkml.kernel.org/r/20221020231427.41be3f26@gandalf.local.home
Cc: Linux Trace Kernel <linux-trace-kernel@vger.kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Primiano Tucci <primiano@google.com>
Cc: stable@vger.kernel.org
Fixes: 1e0d6714ac
2022-12-08 11:23:05 +01:00
net: introduce CAN specific pointer in the struct net_device
2021-04-07 14:47:41 +02:00
iio: st_sensors: Add a local lock for protecting odr
2022-06-14 18:11:59 +02:00
mfd: t7l66xb: Drop platform disable callback
2022-08-25 11:18:04 +02:00
RDMA/mlx4: Do not map the core_clock page to user space unless enabled
2021-06-16 11:59:44 +02:00
net/mlx5: Fix possible use-after-free in async command interface
2022-11-03 23:56:56 +09:00
mmc: core: Fix ambiguous TRIM and DISCARD arg
2022-12-08 11:23:04 +01:00
mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N
2022-06-14 18:12:03 +02:00
netfilter: x_tables: Use correct memory barriers.
2021-03-30 14:35:28 +02:00
netfilter: arp_tables: add pre_exit hook for table unregister
2021-04-21 12:56:16 +02:00
netfilter: ebtables: reject blobs that don't provide all entry points
2022-09-05 10:27:41 +02:00
platform/x86: pmc_atom: Fix SLP_TYPx bitfield mask
2022-09-15 12:04:50 +02:00
power: supply: max17042_battery: fix typo in MAx17042_TOFF
2021-09-15 09:47:27 +02:00
task_stack, x86/cea: Force-inline stack helpers
2022-09-28 11:03:57 +02:00
spi: Fix use-after-free with devm_spi_alloc_*
2021-05-14 09:44:20 +02:00
SUNRPC: Don't call connect() more than once on a TCP socket
2022-05-25 09:14:34 +02:00
usb: typec: altmodes/displayport: correct pin assignment for UFP receptacles
2022-09-15 12:04:52 +02:00
ACPI: tables: x86: Reserve memory occupied by ACPI tables
2021-05-07 10:51:36 +02:00
arm64: entry: Add vectors that have the bhb mitigation sequences
2022-03-19 13:40:15 +01:00
ata: fix ata_id_has_dipm()
2022-10-26 13:22:39 +02:00
block: return the correct bvec when checking for gaps
2021-07-14 16:53:48 +02:00
bitfield.h: Fix "type of reg too small for mask" test
2022-07-29 17:14:18 +02:00
block: don't merge across cgroup boundaries if blkcg is enabled
2022-04-15 14:18:01 +02:00
block: return ELEVATOR_DISCARD_MERGE if possible
2022-05-25 09:14:38 +02:00
x86/speculation: Add missing prototype for unpriv_ebpf_notify()
2022-06-14 18:11:34 +02:00
bpf: Fix pointer arithmetic mask tightening under state pruning
2021-09-15 09:47:39 +02:00
fs: only do a memory barrier for the first set_buffer_uptodate()
2022-09-15 12:04:49 +02:00
drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()
2021-09-26 14:07:10 +02:00
cgroup: Use separate src/dst nodes when preloading css_sets for migration
2022-07-21 20:59:17 +02:00
compiler.h: Introduce absolute_pointer macro
2021-09-30 10:09:25 +02:00
vmlinux.lds.h: Create section for protection against instrumentation
2021-02-17 10:35:16 +01:00
serial: core: Fix initializing and restoring termios speed
2021-11-17 09:48:25 +01:00
vt: Fix character height handling with VT_RESIZEX
2021-05-26 12:05:20 +02:00
x86/bugs: Report AMD retbleed vulnerability
2022-10-07 09:16:54 +02:00
random: clear fast pool, crng, and batches in cpuhp bring up
2022-06-22 14:11:12 +02:00
crypto - shash: reduce minimum alignment of shash_desc structure
2021-03-09 11:09:38 +01:00
debugfs: add debugfs_lookup_and_remove()
2022-09-15 12:04:54 +02:00
dm: remove special-casing of bio-based immutable singleton target on NVMe
2022-06-25 12:44:35 +02:00
PCI/MSI: Protect msi_desc::masked for multi-MSI
2021-08-18 08:57:03 +02:00
linux/dim: Fix divide by 0 in RDMA DIM
2022-07-07 17:36:49 +02:00
Reinstate some of "swiotlb: rework "fix info leak with DMA_FROM_DEVICE""
2022-05-25 09:14:38 +02:00
dyndbg: fix module.dyndbg handling
2022-10-26 13:22:37 +02:00
misc: eeprom_93xx46: Add quirk to support Microchip 93LC46B eeprom
2021-03-11 14:06:50 +01:00
efi: random: reduce seed size to 32 bytes
2022-11-10 17:57:55 +01:00
kyber: fix out of bounds access when preempted
2021-05-19 10:08:30 +02:00
elfcore: correct reference to CONFIG_UML
2021-10-27 09:54:27 +02:00
PM: EM: Increase energy calculation precision
2021-09-15 09:47:33 +02:00
etherdevice: Adjust ether_addr* prototypes to silence -Wstringop-overead
2022-04-27 13:50:45 +02:00
extcon: Add stubs for extcon_register_notifier_all() functions
2021-04-07 14:47:43 +02:00
fbcon: Prevent that screen size is smaller than font size
2022-07-12 16:30:47 +02:00
bpf: Prevent increasing bpf_jit_limit above max
2021-11-17 09:48:20 +01:00
io_uring: disable polling pollfree files
2022-09-05 10:27:47 +02:00
devtmpfs regression fix: reconfigure on each mount
2022-01-20 09:19:17 +01:00
fscrypt: add fscrypt_symlink_getattr() for computing st_size
2021-09-12 08:56:38 +02:00
fsnotify: invalidate dcache before IN_DELETE event
2022-02-01 17:24:39 +01:00
module/ftrace: handle patchable-function-entry
2022-02-23 11:59:56 +01:00
HID: quirks: Allow inverting the absolute X/Y values
2022-01-27 09:19:43 +01:00
hrtimer: Ensure timerfd notification for HIGHRES=n
2021-09-15 09:47:26 +02:00
mm/thp: make is_huge_zero_pmd() safe and quicker
2021-06-30 08:47:52 -04:00
mm/hugetlb: initialize hugetlb_usage in mm_init
2021-09-22 12:26:37 +02:00
random: pull add_hwgenerator_randomness() declaration into random.h
2022-06-22 14:11:12 +02:00
i2c: Add I2C_AQ_NO_REP_START adapter quirk
2021-05-19 10:08:22 +02:00
net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending
2021-03-04 10:26:53 +01:00
net: handle ARPHRD_PIMREG in dev_is_mac_header_xmit()
2022-03-23 09:12:07 +01:00
macvlan: macvlan_count_rx() needs to be aware of preemption
2021-03-30 14:35:25 +02:00
net: igmp: increase size of mr_ifc_count
2021-08-18 08:57:01 +02:00
iomap: iomap that extends beyond EOF should be marked dirty
2022-09-28 11:03:58 +02:00
iommu/iova: Fix module config properly
2022-10-26 13:22:46 +02:00
shm: extend forced shm destroy to support objects from several IPC nses
2021-12-01 09:23:35 +01:00
ipv6: make mc_forwarding atomic
2022-04-15 14:18:32 +02:00
genirq: Provide IRQCHIP_AFFINITY_PRE_STARTUP
2021-08-18 08:57:02 +02:00
hex2bin: make the function hex_to_bin constant-time
2022-05-09 09:03:22 +02:00
kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]
2022-07-02 16:28:50 +02:00
certs: Fix blacklist flag type confusion
2021-03-04 10:26:29 +01:00
kfifo: fix kfifo_to_user() return type
2022-08-25 11:18:04 +02:00
kprobes: Limit max data_size of the kretprobe instances
2021-12-08 09:01:10 +01:00
kthread: Extract KTHREAD_IS_PER_CPU
2021-02-07 15:35:49 +01:00
x86/kvm/vmx: Make noinstr clean
2022-10-07 09:16:54 +02:00
libata: fix read log timeout value
2021-11-17 09:48:17 +01:00
include/linux/list.h: add a macro to test if entry is pointing to the head
2021-09-22 12:26:20 +02:00
binder: use cred instead of task for selinux checks
2021-11-17 09:48:16 +01:00
mailbox: forward the hrtimer if not queued and under a lock
2022-06-14 18:11:42 +02:00
net: phy: marvell: fix detection of PHY on Topaz switches
2021-04-21 12:56:18 +02:00
rtc: mc146818-lib: Fix the AltCentury for AMD platforms
2022-05-25 09:14:32 +02:00
net: mdio: introduce a shutdown method to mdio device drivers
2021-10-09 14:39:49 +02:00
memblock: fix memblock_phys_alloc() section mismatch error
2022-01-05 12:37:44 +01:00
mm: memcontrol: fix occasional OOMs due to proportional memory.low reclaim
2021-08-26 08:36:22 -04:00
mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()
2021-09-22 12:26:43 +02:00
mmap locking API: initial implementation as rwsem wrappers
2022-07-29 17:14:18 +02:00
mm: fix struct page layout on 32-bit systems
2021-05-19 10:08:31 +02:00
mmap locking API: initial implementation as rwsem wrappers
2022-07-29 17:14:18 +02:00
mm: Fix '.data.once' orphan section warning
2022-12-08 11:23:04 +01:00
arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
2022-05-15 19:54:46 +02:00
x86/cpu: Add a steppings field to struct x86_cpu_id
2022-10-07 09:16:54 +02:00
modules: inherit TAINT_PROPRIETARY_MODULE
2021-05-11 14:04:04 +02:00
PCI/MSI: Protect msi_desc::masked for multi-MSI
2021-08-18 08:57:03 +02:00
locking/mutex: Fix non debug version of mutex_lock_io_nested()
2021-03-30 14:35:29 +02:00
net: Fix features skip in for_each_netdev_feature()
2022-05-18 09:47:24 +02:00
netdevice: add the case if dev is NULL
2022-04-15 14:17:56 +02:00
NFS: swap IO handling is slightly different for O_DIRECT IO
2022-04-15 14:18:35 +02:00
watchdog: export lockup_detector_reconfigure
2022-08-25 11:18:37 +02:00
nodemask: Fix return values to be unsigned
2022-06-14 18:12:02 +02:00
of: clk: Make <linux/of_clk.h> self-contained
2021-12-08 09:01:08 +01:00
once: fix section mismatch on clang builds
2022-11-01 19:06:42 +01:00
mm, oom: make the calculation of oom badness more accurate
2021-09-03 10:08:12 +02:00
mm, futex: fix shared futex pgoff on shmem huge page
2021-06-30 08:47:55 -04:00
PCI/ACPI: Add Ampere Altra SOC MCFG quirk
2021-09-26 14:07:05 +02:00
PCI: Reduce warnings on possible RW1C corruption
2022-04-15 14:18:15 +02:00
PCI: Add defines for normal and subtractive PCI bridges
2022-08-25 11:17:25 +02:00
perf: Protect perf_guest_cbs with RCU
2022-01-20 09:19:18 +01:00
PM: runtime: Fix unpaired parent child_count for force_resume
2021-05-19 10:08:20 +02:00
siphash: use one source of truth for siphash permutations
2022-06-22 14:11:16 +02:00
psi: Fix uaf issue when psi trigger is destroyed while being polled
2022-02-05 12:35:36 +01:00
psi: Fix uaf issue when psi trigger is destroyed while being polled
2022-02-05 12:35:36 +01:00
ptp: improve max_adj check against unreasonable values
2021-06-23 14:41:26 +02:00
ptrace/xtensa: Replace PT_SINGLESTEP with TIF_SINGLESTEP
2022-06-14 18:11:24 +02:00
random: mark bootloader randomness code as __init
2022-06-22 14:11:19 +02:00
random: quiet urandom warning ratelimit suppression message
2022-06-29 08:58:45 +02:00
rcu/nocb: Perform deferred wake up before last idle's need_resched() check
2021-03-04 10:26:47 +01:00
locking/refcount: Consolidate implementations of refcount_t
2022-07-29 17:14:17 +02:00
tracing/ring-buffer: Have polling block on watermark
2022-12-08 11:23:05 +01:00
mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse
2022-09-05 10:27:46 +02:00
rpmsg: Fix rpmsg_create_ept return when RPMSG config is not defined
2021-11-17 09:48:44 +01:00
misc: rtsx_usb: use separate command and response buffers
2022-07-12 16:30:49 +02:00
kernel/sched: Remove dl_boosted flag comment
2022-09-05 10:27:39 +02:00
lockdown: also lock down previous kgdb use
2022-06-06 08:33:48 +02:00
serial: Create uart_xmit_advance()
2022-09-28 11:04:08 +02:00
siphash: use one source of truth for siphash permutations
2022-06-22 14:11:16 +02:00
io_uring/af_unix: defer registered files gc to io_uring release
2022-10-26 13:22:59 +02:00
bpf, sockmap: Fix sk->prot unhash op reset
2021-04-14 08:24:12 +02:00
smp: Fix smp_call_function_single_async prototype
2021-05-14 09:44:33 +02:00
net: make get_net_ns return error if NET_NS is disabled
2021-06-23 14:41:25 +02:00
net: stmmac: disable Split Header (SPH) for Intel platforms
2022-05-25 09:14:38 +02:00
stop_machine: mark helpers __always_inline
2021-03-17 17:03:56 +01:00
PM: s2idle: ACPI: Fix wakeup interrupts handling
2022-02-16 12:52:50 +01:00
swap: fix swapfile read/write offset
2021-03-07 12:20:49 +01:00
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2021-03-07 12:20:48 +01:00
tcp: fix tcp_cwnd_validate() to not forget is_cwnd_limited
2022-10-26 13:22:26 +02:00
tee: export teedev_open() and teedev_close_context()
2022-03-02 11:41:04 +01:00
thermal/core: Fix thermal_cooling_device_register() prototype
2021-09-26 14:07:10 +02:00
kernel, fs: Introduce and use set_restart_fn() and arch_set_restart_data()
2021-03-24 11:26:44 +01:00
Revert "time: Handle negative seconds correctly in timespec64_to_ns()"
2021-09-16 12:56:13 +02:00
timekeeping: Add raw clock fallback for random_get_entropy()
2022-06-22 14:11:15 +02:00
sched/topology: Make sched_init_numa() use a set for the deduplicating sort
2022-03-08 19:07:48 +01:00
tpm: eventlog: Fix section mismatch for DEBUG_SECTION_MISMATCH
2022-08-25 11:18:11 +02:00
tracepoint: Add tracepoint_probe_register_may_exist() for BPF tracing
2021-07-14 16:53:08 +02:00
tty: fix return value for unsupported ioctls
2021-05-14 09:44:22 +02:00
tty: use new tty_insert_flip_string_and_push_buffer() in pty_write()
2022-07-29 17:14:20 +02:00
u64_stats,lockdep: Fix u64_stats_init() vs lockdep
2021-03-30 14:35:22 +02:00
udp: fix skb_copy_and_csum_datagram with odd segment sizes
2021-02-17 10:35:19 +01:00
USB: core: Prevent nested device-reset calls
2022-09-15 12:04:52 +02:00
usb-storage: Add quirk to defeat Kindle's automatic unload
2021-03-24 11:26:40 +01:00
virtio: unexport virtio_finalize_features
2022-03-16 13:21:48 +01:00
virtio: acknowledge all features before access
2022-03-16 13:21:48 +01:00
net: skip virtio_net_hdr_set_proto if protocol already set
2021-12-29 12:23:34 +01:00
wait: Fix __wait_event_hrtimeout for RT/DL tasks
2022-08-25 11:17:29 +02:00
XArray: add xas_split
2021-06-10 13:37:14 +02:00
zsmalloc: account the number of compacted pages correctly
2021-03-07 12:20:49 +01:00
