Thomas Gleixner
e8646f5d34
serial: core: Provide port lock wrappers ...
[ Upstream commit b0af4bcb49464c221ad5f95d40f2b1b252ceedcc ]
When a serial port is used for kernel console output, then all
modifications to the UART registers which are done from other contexts,
e.g. getty, termios, are interference points for the kernel console.
So far this has been ignored and the printk output is based on the
principle of hope. The rework of the console infrastructure which aims to
support threaded and atomic consoles, requires to mark sections which
modify the UART registers as unsafe. This allows the atomic write function
to make informed decisions and eventually to restore operational state. It
also allows to prevent the regular UART code from modifying UART registers
while printk output is in progress.
All modifications of UART registers are guarded by the UART port lock,
which provides an obvious synchronization point with the console
infrastructure.
Provide wrapper functions for spin_[un]lock*(port->lock) invocations so
that the console mechanics can be applied later on at a single place and
does not require to copy the same logic all over the drivers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-2-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 54c4ec5f8c47 ("serial: mxs-auart: add spinlock around changing cts state")
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-05-02 16:18:35 +02:00
can: sja1000: fix size of OCR_MODE_MASK define
2022-12-19 12:24:16 +01:00
firmware: meson_sm: Rework driver as a proper platform driver
2024-04-13 12:51:26 +02:00
iio: st_sensors: Add a local lock for protecting odr
2022-06-14 18:11:59 +02:00
mailbox: zynqmp: Fix typo in IPI documentation
2023-05-17 11:35:55 +02:00
net: xgene: Move shared header file into include/linux
2023-02-06 07:52:47 +01:00
mfd: t7l66xb: Drop platform disable callback
2022-08-25 11:18:04 +02:00
net/mlx5_core: Clean driver version and name
2023-11-28 16:50:17 +00:00
mmc: core: add helpers mmc_regulator_enable/disable_vqmmc
2023-12-13 18:18:15 +01:00
mtd: cfi_cmdset_0002: Use chip_ready() for write on S29GL064N
2022-06-14 18:12:03 +02:00
netfilter: ipset: fix performance regression in swap operation
2024-02-23 08:25:14 +01:00
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: bq27xxx: Fix poll_interval handling and races on remove
2023-05-30 12:44:10 +01:00
kernel/fork: beware of __put_task_struct() calling context
2023-09-23 11:00:03 +02:00
firmware: ti_sci: Replace HTTP links with HTTPS ones
2023-11-20 10:30:12 +01:00
spi: introduce SPI_MODE_X_MASK macro
2024-02-23 08:24:48 +01:00
SUNRPC: increase size of rpc_wait_queue.qlen from unsigned short to unsigned int
2024-04-13 12:51:38 +02:00
usb: typec: bus: verify partner exists in typec_altmode_attention
2023-09-23 11:00:01 +02:00
ACPI/IORT: Make iort_msi_map_rid() PCI agnostic
2023-12-13 18:18:10 +01:00
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
bitfield.h: Fix "type of reg too small for mask" test
2022-07-29 17:14:18 +02:00
ocfs2/dlm: move BITS_TO_BYTES() to bitops.h for wider use
2023-06-09 10:28:54 +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
bpf: Add map and need_defer parameters to .map_fd_put_ptr()
2024-02-23 08:24:57 +01:00
fs: only do a memory barrier for the first set_buffer_uptodate()
2022-09-15 12:04:49 +02:00
cgroup: Use separate src/dst nodes when preloading css_sets for migration
2022-07-21 20:59:17 +02:00
memcg: fix possible use-after-free in memcg_write_event_control()
2022-12-14 11:30:43 +01:00
clk: Fix undefined reference to `clk_rate_exclusive_{get,put}'
2023-08-30 16:27:27 +02:00
init: Provide arch_cpu_finalize_init()
2023-08-08 19:56:33 +02:00
hrtimers: Push pending hrtimers away from outgoing CPU earlier
2023-12-13 18:18:09 +01:00
cred: switch to using atomic_long_t
2023-12-20 15:41:18 +01:00
debugfs: regset32: Add Runtime PM support
2023-05-17 11:35:32 +02:00
PM/devfreq: governor: Add a private governor_data for governor
2023-01-18 11:41:52 +01:00
dm: remove special-casing of bio-based immutable singleton target on NVMe
2022-06-25 12:44:35 +02:00
driver: platform: Add helper for safer setting of driver_override
2023-11-08 11:23:39 +01:00
linux/dim: Do nothing if no time delta between samples
2023-05-30 12:44:01 +01:00
dma-mapping: add generic helpers for mapping sgtable objects
2023-02-25 11:53:25 +01:00
dma-mapping: drop the dev argument to arch_sync_dma_for_*
2023-04-05 11:16:43 +02:00
dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV
2024-02-23 08:25:06 +01:00
dyndbg: fix module.dyndbg handling
2022-10-26 13:22:37 +02:00
efi: random: reduce seed size to 32 bytes
2022-11-10 17:57:55 +01:00
net: create netdev->dev_addr assignment helpers
2023-07-27 08:37:08 +02:00
eventfd: Export eventfd_ctx_do_read()
2023-09-23 10:59:40 +02:00
fbcon: Prevent that screen size is smaller than font size
2022-07-12 16:30:47 +02:00
bpf: Mark bpf_spin_{lock,unlock}() helpers with notrace correctly
2024-03-26 18:22:15 -04:00
objtool: Add support for intra-function calls
2024-04-13 12:51:29 +02:00
fs: add a vfs_fchmod helper
2024-04-13 12:51:35 +02:00
devtmpfs regression fix: reconfigure on each mount
2022-01-20 09:19:17 +01:00
fsnotify: invalidate dcache before IN_DELETE event
2022-02-01 17:24:39 +01:00
ftrace: Mark get_lock_parent_ip() __always_inline
2023-04-20 12:07:34 +02:00
mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations
2024-04-13 12:51:34 +02:00
HID: fix HID device resource race between HID core and debugging support
2023-12-08 08:44:23 +01:00
mm/highmem: Lift memcpy_[to|from]_page to core
2023-01-18 11:41:55 +01:00
gpu: host1x: mipi: Update tegra_mipi_request() to be node based
2024-03-26 18:22:18 -04:00
hrtimer: Report offline hrtimer enqueue
2024-02-23 08:25:08 +01:00
hugetlb: check for undefined shift on 32 bit architectures
2023-02-22 12:50:39 +01:00
random: pull add_hwgenerator_randomness() declaration into random.h
2022-06-22 14:11:12 +02:00
Fix termination state for idr_for_each_entry_ul()
2023-11-20 10:30:15 +01:00
net: handle ARPHRD_PPP in dev_is_mac_header_xmit()
2023-09-23 10:59:55 +02:00
team: fix null-ptr-deref when team device type is changed
2023-10-10 21:46:37 +02:00
net: add vlan_get_protocol_and_depth() helper
2023-05-30 12:44:01 +01:00
ima: Align ima_file_mmap() parameters with mmap_file LSM hook
2023-03-11 16:44:02 +01:00
interconnect: Add helpers for enabling/disabling a path
2023-08-30 16:27:13 +02:00
genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()
2023-05-17 11:35:46 +02:00
iomap: iomap that extends beyond EOF should be marked dirty
2022-09-28 11:03:58 +02:00
iommu: Add gfp parameter to iommu_ops::map
2023-02-22 12:50:31 +01:00
resource: Add irqresource_disabled()
2023-10-25 11:53:22 +02:00
iommu/iova: Fix module config properly
2022-10-26 13:22:46 +02:00
ipv6: make mc_forwarding atomic
2022-04-15 14:18:32 +02:00
irqdomain: Change the type of 'size' in __irq_domain_add() to be consistent
2023-03-17 08:32:49 +01:00
jbd2: fix kernel-doc markups
2023-08-11 11:53:43 +02:00
panic: Consolidate open-coded panic_on_warn checks
2023-02-06 07:52:50 +01:00
genirq: Fix the return type of kstat_cpu_irqs_sum()
2023-03-11 16:43:38 +01:00
kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]
2022-07-02 16:28:50 +02:00
kfifo: fix kfifo_to_user() return type
2022-08-25 11:18:04 +02:00
x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range
2023-03-11 16:44:02 +01:00
x86/kvm/vmx: Make noinstr clean
2022-10-07 09:16:54 +02:00
ata: libata-sata: increase PMP SRST timeout to 10s
2023-10-10 21:46:42 +02:00
list: add "list_del_init_careful()" to go with "list_empty_careful()"
2023-06-28 10:18:35 +02:00
drm/syncobj: make lockdep complain on WAIT_FOR_SUBMIT v3
2024-03-01 13:13:38 +01:00
lsm: new security_file_ioctl_compat() hook
2024-02-23 08:25:15 +01:00
mailbox: forward the hrtimer if not queued and under a lock
2022-06-14 18:11:42 +02:00
ext4: fix deadlock due to mbcache entry corruption
2023-01-18 11:41:56 +01:00
rtc: mc146818-lib: Fix the AltCentury for AMD platforms
2022-05-25 09:14:32 +02:00
mcb: remove is_added flag from mcb_device struct
2023-10-25 11:53:19 +02:00
memblock: fix memblock_phys_alloc() section mismatch error
2022-01-05 12:37:44 +01:00
mm: allow a controlled amount of unfairness in the page lock
2023-08-30 16:27:26 +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
new helper: lookup_positive_unlocked()
2023-09-23 10:59:40 +02:00
net: Fix features skip in for_each_netdev_feature()
2022-05-18 09:47:24 +02:00
net: add DEV_STATS_READ() helper
2023-11-20 10:30:10 +01:00
Remove DECnet support from kernel
2023-06-21 15:44:10 +02:00
Remove DECnet support from kernel
2023-06-21 15:44:10 +02:00
NFS: swap IO handling is slightly different for O_DIRECT IO
2022-04-15 14:18:35 +02:00
fs/nls: make load_nls() take a const parameter
2023-09-23 10:59:38 +02:00
watchdog/perf: define dummy watchdog_update_hrtimer_threshold() on correct config
2023-07-27 08:37:10 +02:00
nodemask: Fix return values to be unsigned
2022-06-14 18:12:02 +02:00
uaccess: Add speculation barrier to copy_from_user()
2023-02-25 11:53:26 +01:00
nvme-tcp: fix nvme_tcp_term_pdu to match spec
2023-04-05 11:16:38 +02:00
nvme: handle the persistent internal error AER
2023-05-17 11:35:43 +02:00
of: Add missing 'Return' section in kerneldoc comments
2023-12-13 18:18:11 +01:00
of/irq: Make of_msi_map_rid() PCI bus agnostic
2023-12-13 18:18:11 +01:00
once: fix section mismatch on clang builds
2022-11-01 19:06:42 +01:00
PCI: Add pci_clear_master() stub for non-CONFIG_PCI
2023-07-27 08:37:16 +02:00
PCI: add INTEL_HDA_ARL to pci_ids.h
2024-02-23 08:25:01 +01:00
perf/core: Add a new read format to get a number of lost samples
2023-12-13 18:18:15 +01:00
driver: platform: Add helper for safer setting of driver_override
2023-11-08 11:23:39 +01:00
PM: domains: Restore comment indentation for generic_pm_domain.child_links
2023-05-17 11:36:04 +02:00
PM: runtime: Have devm_pm_runtime_enable() handle pm_runtime_dont_use_autosuspend()
2024-02-23 08:25:14 +01:00
PM / wakeirq: support enabling wake-up irq after runtime_suspend called
2023-08-11 11:54:00 +02:00
fs/select: rework stack allocation hack for clang
2024-03-26 18:22:13 -04:00
power: supply: core: Refactor power_supply_set_input_current_limit_from_supplier()
2023-06-05 08:17:31 +02:00
siphash: use one source of truth for siphash permutations
2022-06-22 14:11:16 +02:00
sched/rt: Provide migrate_disable/enable() inlines
2023-11-20 10:30:12 +01:00
printk: declare printk_deferred_{enter,safe}() in include/linux/printk.h
2023-05-17 11:36:04 +02:00
net, proc: Provide PROC_FS=n fallback for proc_create_net_single_write()
2023-01-18 11:41:02 +01:00
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
ptrace/xtensa: Replace PT_SINGLESTEP with TIF_SINGLESTEP
2022-06-14 18:11:24 +02:00
pwm: Fix double shift bug
2023-11-28 16:50:16 +00:00
quota: Fix slow quotaoff
2023-10-25 11:53:18 +02:00
quota: Fix slow quotaoff
2023-10-25 11:53:18 +02:00
scsi: core: raid_class: Remove raid_component_add()
2023-08-30 16:27:27 +02:00
random: always mix cycle counter in add_latent_entropy()
2023-02-25 11:53:25 +01:00
random: quiet urandom warning ratelimit suppression message
2022-06-29 08:58:45 +02:00
rcu: add a helper to report consolidated flavor QS
2024-03-26 18:22:25 -04:00
locking/refcount: Consolidate implementations of refcount_t
2022-07-29 17:14:17 +02:00
regmap: Add bulk read/write callbacks into regmap_config
2024-03-15 10:48:20 -04:00
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 calling device_lock() on non-initialized device
2023-11-08 11:23:39 +01:00
misc: rtsx_usb: use separate command and response buffers
2022-07-12 16:30:49 +02:00
scatterlist: add generic wrappers for iterating over sgtable objects
2023-02-25 11:53:25 +01:00
kernel/sched: Remove dl_boosted flag comment
2022-09-05 10:27:39 +02:00
lsm: new security_file_ioctl_compat() hook
2024-02-23 08:25:15 +01:00
Revert "8250: add support for ASIX devices with a FIFO bug"
2023-07-27 08:37:38 +02:00
serial: core: Provide port lock wrappers
2024-05-02 16:18:35 +02:00
sh: intc: Avoid spurious sizeof-pointer-div warning
2023-03-22 13:28:08 +01:00
siphash: use one source of truth for siphash permutations
2022-06-22 14:11:16 +02:00
netfilter: nf_tables: fix ifdef to also consider nf_tables=m
2023-04-26 11:24:02 +02:00
net: stmmac: do not stop RX_CLK in Rx LPI state for qcs404 SoC
2023-02-22 12:50:34 +01:00
lib/string_helpers: Introduce string_upper() and string_lower() helpers
2023-05-30 12:44:08 +01:00
PM: s2idle: ACPI: Fix wakeup interrupts handling
2022-02-16 12:52:50 +01:00
x86/entry/ia32: Ensure s32 is sign extended to s64
2024-02-23 08:24:53 +01:00
sysctl: add a new register_sysctl_init() interface
2023-02-06 07:52:48 +01:00
tcp: annotate data-races around fastopenq.max_qlen
2023-07-27 08:37:45 +02:00
tee: export teedev_open() and teedev_close_context()
2022-03-02 11:41:04 +01:00
tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
2023-05-17 11:35:57 +02:00
timers: Rename del_timer_sync() to timer_delete_sync()
2024-04-13 12:51:21 +02:00
timerqueue: Use rb_entry_safe() in timerqueue_getnext()
2023-01-18 11:40:53 +01:00
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
efi: tpm: Avoid READ_ONCE() for accessing the event log
2023-01-18 11:42:00 +01:00
tracing: Have trace_event_file have ref counters
2023-11-28 16:50:22 +00:00
tracing: Make tracepoint lockdep check actually test something
2023-03-22 13:28:08 +01:00
tty: Prevent writing chars during tcsetattr TCSADRAIN/FLUSH
2023-05-17 11:36:04 +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: fix u64_stats_init() for lockdep when used repeatedly in one file
2024-05-02 16:18:28 +02:00
uaccess: Add minimum bounds check on kernel buffer size
2023-03-11 16:43:56 +01:00
units: add the HZ macros
2024-02-23 08:24:47 +01:00
USB: core: Add routines for endpoint checks in old drivers
2023-05-30 12:44:10 +01:00
vfio: Introduce interface to flush virqfd inject workqueue
2024-04-13 12:51:34 +02:00
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: do not allow gso_size to be set to GSO_BY_FRAGS
2023-08-30 16:27:17 +02:00
linux/vt_buffer.h: allow either builtin or modular for macros
2023-05-17 11:35:46 +02:00
mm: allow a controlled amount of unfairness in the page lock
2023-08-30 16:27:26 +02:00
workqueue: clean up WORK_* constant types, clarify masking
2023-07-27 08:37:29 +02:00
