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i3c_xfers was left undocumented, document it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://patch.msgid.link/20251202153804.2640623-2-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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0x31 is decimal 49 and doesn't fit in a 32 bit integer, switch to the
intended decimal 31.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202512020956.Dnz8A2H0-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512021613.97jVprvJ-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202512021644.lp8ZMSx5-lkp@intel.com/
Link: https://patch.msgid.link/20251202153804.2640623-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scoped user access updates from Thomas Gleixner:
"Scoped user mode access and related changes:
- Implement the missing u64 user access function on ARM when
CONFIG_CPU_SPECTRE=n.
This makes it possible to access a 64bit value in generic code with
[unsafe_]get_user(). All other architectures and ARM variants
provide the relevant accessors already.
- Ensure that ASM GOTO jump label usage in the user mode access
helpers always goes through a local C scope label indirection
inside the helpers.
This is required because compilers are not supporting that a ASM
GOTO target leaves a auto cleanup scope. GCC silently fails to emit
the cleanup invocation and CLANG fails the build.
[ Editor's note: gcc-16 will have fixed the code generation issue
in commit f68fe3ddda4 ("eh: Invoke cleanups/destructors in asm
goto jumps [PR122835]"). But we obviously have to deal with clang
and older versions of gcc, so.. - Linus ]
This provides generic wrapper macros and the conversion of affected
architecture code to use them.
- Scoped user mode access with auto cleanup
Access to user mode memory can be required in hot code paths, but
if it has to be done with user controlled pointers, the access is
shielded with a speculation barrier, so that the CPU cannot
speculate around the address range check. Those speculation
barriers impact performance quite significantly.
This cost can be avoided by "masking" the provided pointer so it is
guaranteed to be in the valid user memory access range and
otherwise to point to a guaranteed unpopulated address space. This
has to be done without branches so it creates an address dependency
for the access, which the CPU cannot speculate ahead.
This results in repeating and error prone programming patterns:
if (can_do_masked_user_access())
from = masked_user_read_access_begin((from));
else if (!user_read_access_begin(from, sizeof(*from)))
return -EFAULT;
unsafe_get_user(val, from, Efault);
user_read_access_end();
return 0;
Efault:
user_read_access_end();
return -EFAULT;
which can be replaced with scopes and automatic cleanup:
scoped_user_read_access(from, Efault)
unsafe_get_user(val, from, Efault);
return 0;
Efault:
return -EFAULT;
- Convert code which implements the above pattern over to
scope_user.*.access(). This also corrects a couple of imbalanced
masked_*_begin() instances which are harmless on most
architectures, but prevent PowerPC from implementing the masking
optimization.
- Add a missing speculation barrier in copy_from_user_iter()"
* tag 'core-uaccess-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lib/strn*,uaccess: Use masked_user_{read/write}_access_begin when required
scm: Convert put_cmsg() to scoped user access
iov_iter: Add missing speculation barrier to copy_from_user_iter()
iov_iter: Convert copy_from_user_iter() to masked user access
select: Convert to scoped user access
x86/futex: Convert to scoped user access
futex: Convert to get/put_user_inline()
uaccess: Provide put/get_user_inline()
uaccess: Provide scoped user access regions
arm64: uaccess: Use unsafe wrappers for ASM GOTO
s390/uaccess: Use unsafe wrappers for ASM GOTO
riscv/uaccess: Use unsafe wrappers for ASM GOTO
powerpc/uaccess: Use unsafe wrappers for ASM GOTO
x86/uaccess: Use unsafe wrappers for ASM GOTO
uaccess: Provide ASM GOTO safe wrappers for unsafe_*_user()
ARM: uaccess: Implement missing __get_user_asm_dword()
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- Bring in a couple more BPF drivers for various devices (Benjamin Tissoires)
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- Power management/hibernation improvements in intel-ish (Zhang Lixu)
- Switch of intel-ish to unbound workqueues (Zhang Lixu)
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- switch to WQ_PERCPU workaueues (Marco Crivellari)
- reduce potential initialization blocking time of hid-nintendo (Willy Huang)
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Commit 9b8b84879d4a ("block: Increase BLK_DEF_MAX_SECTORS_CAP") increased
the default max_sectors_kb from 1280 KiB to 4096 KiB.
DELLBOSS VD with FW rev MV.R00-0 times out when sending I/Os of size
4096 KiB.
Enable ATA_QUIRK_MAX_SEC, with value 8191 (sectors) for this device,
since any I/O with more sectors than that lead to I/O timeouts.
With this, the DELLBOSS VD SATA controller is usable again.
Cc: stable+noautosel@kernel.org # depends on Move quirk flags to their own enum
Fixes: 9b8b84879d4a ("block: Increase BLK_DEF_MAX_SECTORS_CAP")
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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The anonymous enum in include/linux/libata.h that is used to store
various global constants can currently be backed by type int.
(It contains both negative and positive constants.)
__ATA_QUIRK_MAX is currently 31.
The quirk flags in the various global constants enum are defined as
"1U << quirk_flag_bit".
Thus if we simply add an additional quirk, the quirk flag will be 1 << 31,
which is a value that is too large to be represented by a signed int.
The various global constants enum will thus therefore be backed by type
long.
This will lead to error prints like e.g.:
ata_port_err(ap, "EH pending after %d tries, giving up\n",
ATA_EH_MAX_TRIES);
now failing to build, with build error:
error: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Werror=format=]
This is because all constants in the various global constants enum now
has to be printed as a long, as that is now the backing type of the enum.
Since the compiler will use the smallest possible backing type for an
enum, it is good practice to not mix unrelated things in a single enum.
Move the quirk flags to a separate enum, so that we don't need to change
the printf specifier for all other constants in the "various global
constants" enum when adding an additional quirk.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
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https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
Extra drm-misc-next for v6.19-rc1:
UAPI Changes:
- Add support for drm colorop pipeline.
- Add COLOR PIPELINE plane property.
- Add DRM_CLIENT_CAP_PLANE_COLOR_PIPELINE.
Cross-subsystem Changes:
- Attempt to use higher order mappings in system heap allocator.
- Always taint kernel with sw-sync.
Core Changes:
- Small fixes to drm/gem.
- Support emergency restore to drm-client.
- Allocate and release fb_info in single place.
- Rework ttm pipelined eviction fence handling.
Driver Changes:
- Support the drm color pipeline in vkms, amdgfx.
- Add NVJPG driver for tegra.
- Assorted small fixes and updates to rockchip, bridge/dw-hdmi-qp,
panthor.
- Add ASL CS5263 DP-to-HDMI simple bridge.
- Add and improve support for G LD070WX3-SL01 MIPI DSI, Samsung LTL106AL0,
Samsung LTL106AL01, Raystar RFF500F-AWH-DNN, Winstar WF70A8SYJHLNGA,
Wanchanglong w552946aaa, Samsung SOFEF00, Lenovo X13s panel.
- Add support for it66122 to it66121.
- Support mali-G1 gpu in panthor.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patch.msgid.link/aa5cbd50-7676-4a59-bbed-e8428af86804@linux.intel.com
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https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v6.19
This is a very large set of updates, as well as some more extensive
cleanup work from Morimto-san we've also added a generic SCDA class
driver for SoundWire devices enabling us to support many chips with
no custom code. There's also a batch of new drivers added for both
SoCs and CODECs.
- Added a SoundWire SCDA generic class driver, pulling in a little
regmap work to support it.
- A *lot* of cleaup and API improvement work from Morimoto-san.
- Lots of work on the existing Cirrus, Intel, Maxim and Qualcomm
drivers.
- Support for Allwinner A523, Mediatek MT8189, Qualcomm QCM2290,
QRB2210 and SM6115, SpacemiT K1, and TI TAS2568, TAS5802, TAS5806,
TAS5815, TAS5828 and TAS5830.
This also pulls in some gpiolib changes supporting shared GPIOs in the
core there so we can convert some of the ASoC drivers open coding
handling of that to the core functionality.
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull bug handling infrastructure updates from Ingo Molnar:
"Core updates:
- Improve WARN(), which has vararg printf like arguments, to work
with the x86 #UD based WARN-optimizing infrastructure by hiding the
format in the bug_table and replacing this first argument with the
address of the bug-table entry, while making the actual function
that's called a UD1 instruction (Peter Zijlstra)
- Introduce the CONFIG_DEBUG_BUGVERBOSE_DETAILED Kconfig switch (Ingo
Molnar, s390 support by Heiko Carstens)
Fixes and cleanups:
- bugs/s390: Remove private WARN_ON() implementation (Heiko Carstens)
- <asm/bugs.h>: Make i386 use GENERIC_BUG_RELATIVE_POINTERS (Peter
Zijlstra)"
* tag 'core-bugs-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
x86/bugs: Make i386 use GENERIC_BUG_RELATIVE_POINTERS
x86/bug: Fix BUG_FORMAT vs KASLR
x86_64/bug: Inline the UD1
x86/bug: Implement WARN_ONCE()
x86_64/bug: Implement __WARN_printf()
x86/bug: Use BUG_FORMAT for DEBUG_BUGVERBOSE_DETAILED
x86/bug: Add BUG_FORMAT basics
bug: Allow architectures to provide __WARN_printf()
bug: Implement WARN_ON() using __WARN_FLAGS()
bug: Add report_bug_entry()
bug: Add BUG_FORMAT_ARGS infrastructure
bug: Clean up CONFIG_GENERIC_BUG_RELATIVE_POINTERS
bug: Add BUG_FORMAT infrastructure
x86: Rework __bug_table helpers
bugs/s390: Remove private WARN_ON() implementation
bugs/core: Reorganize fields in the first line of WARNING output, add ->comm[] output
bugs/sh: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/parisc: Concatenate 'cond_str' with '__FILE__' in __WARN_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/riscv: Concatenate 'cond_str' with '__FILE__' in __BUG_FLAGS(), to extend WARN_ON/BUG_ON output
bugs/riscv: Pass in 'cond_str' to __BUG_FLAGS()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Scalability and load-balancing improvements:
- Enable scheduler feature NEXT_BUDDY (Mel Gorman)
- Reimplement NEXT_BUDDY to align with EEVDF goals (Mel Gorman)
- Skip sched_balance_running cmpxchg when balance is not due (Tim
Chen)
- Implement generic code for architecture specific sched domain NUMA
distances (Tim Chen)
- Optimize the NUMA distances of the sched-domains builds of Intel
Granite Rapids (GNR) and Clearwater Forest (CWF) platforms (Tim
Chen)
- Implement proportional newidle balance: a randomized algorithm that
runs newidle balancing proportional to its success rate. (Peter
Zijlstra)
Scheduler infrastructure changes:
- Implement the 'sched_change' scoped_guard() pattern for the entire
scheduler (Peter Zijlstra)
- More broadly utilize the sched_change guard (Peter Zijlstra)
- Add support to pick functions to take runqueue-flags (Joel
Fernandes)
- Provide and use set_need_resched_current() (Peter Zijlstra)
Fair scheduling enhancements:
- Forfeit vruntime on yield (Fernand Sieber)
- Only update stats for allowed CPUs when looking for dst group (Adam
Li)
CPU-core scheduling enhancements:
- Optimize core cookie matching check (Fernand Sieber)
Deadline scheduler fixes:
- Only set free_cpus for online runqueues (Doug Berger)
- Fix dl_server time accounting (Peter Zijlstra)
- Fix dl_server stop condition (Peter Zijlstra)
Proxy scheduling fixes:
- Yield the donor task (Fernand Sieber)
Fixes and cleanups:
- Fix do_set_cpus_allowed() locking (Peter Zijlstra)
- Fix migrate_disable_switch() locking (Peter Zijlstra)
- Remove double update_rq_clock() in __set_cpus_allowed_ptr_locked()
(Hao Jia)
- Increase sched_tick_remote timeout (Phil Auld)
- sched/deadline: Use cpumask_weight_and() in dl_bw_cpus() (Shrikanth
Hegde)
- sched/deadline: Clean up select_task_rq_dl() (Shrikanth Hegde)"
* tag 'sched-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (44 commits)
sched: Provide and use set_need_resched_current()
sched/fair: Proportional newidle balance
sched/fair: Small cleanup to update_newidle_cost()
sched/fair: Small cleanup to sched_balance_newidle()
sched/fair: Revert max_newidle_lb_cost bump
sched/fair: Reimplement NEXT_BUDDY to align with EEVDF goals
sched/fair: Enable scheduler feature NEXT_BUDDY
sched: Increase sched_tick_remote timeout
sched/fair: Have SD_SERIALIZE affect newidle balancing
sched/fair: Skip sched_balance_running cmpxchg when balance is not due
sched/deadline: Minor cleanup in select_task_rq_dl()
sched/deadline: Use cpumask_weight_and() in dl_bw_cpus
sched/deadline: Document dl_server
sched/deadline: Fix dl_server stop condition
sched/deadline: Fix dl_server time accounting
sched/core: Remove double update_rq_clock() in __set_cpus_allowed_ptr_locked()
sched/eevdf: Fix min_vruntime vs avg_vruntime
sched/core: Add comment explaining force-idle vruntime snapshots
sched/core: Optimize core cookie matching check
sched/proxy: Yield the donor task
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance events updates from Ingo Molnar:
"Callchain support:
- Add support for deferred user-space stack unwinding for perf,
enabled on x86. (Peter Zijlstra, Steven Rostedt)
- unwind_user/x86: Enable frame pointer unwinding on x86 (Josh
Poimboeuf)
x86 PMU support and infrastructure:
- x86/insn: Simplify for_each_insn_prefix() (Peter Zijlstra)
- x86/insn,uprobes,alternative: Unify insn_is_nop() (Peter Zijlstra)
Intel PMU driver:
- Large series to prepare for and implement architectural PEBS
support for Intel platforms such as Clearwater Forest (CWF) and
Panther Lake (PTL). (Dapeng Mi, Kan Liang)
- Check dynamic constraints (Kan Liang)
- Optimize PEBS extended config (Peter Zijlstra)
- cstates:
- Remove PC3 support from LunarLake (Zhang Rui)
- Add Pantherlake support (Zhang Rui)
- Clearwater Forest support (Zide Chen)
AMD PMU driver:
- x86/amd: Check event before enable to avoid GPF (George Kennedy)
Fixes and cleanups:
- task_work: Fix NMI race condition (Peter Zijlstra)
- perf/x86: Fix NULL event access and potential PEBS record loss
(Dapeng Mi)
- Misc other fixes and cleanups (Dapeng Mi, Ingo Molnar, Peter
Zijlstra)"
* tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
perf/x86/intel: Fix and clean up intel_pmu_drain_arch_pebs() type use
perf/x86/intel: Optimize PEBS extended config
perf/x86/intel: Check PEBS dyn_constraints
perf/x86/intel: Add a check for dynamic constraints
perf/x86/intel: Add counter group support for arch-PEBS
perf/x86/intel: Setup PEBS data configuration and enable legacy groups
perf/x86/intel: Update dyn_constraint base on PEBS event precise level
perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR
perf/x86/intel: Process arch-PEBS records or record fragments
perf/x86/intel/ds: Factor out PEBS group processing code to functions
perf/x86/intel/ds: Factor out PEBS record processing code to functions
perf/x86/intel: Initialize architectural PEBS
perf/x86/intel: Correct large PEBS flag check
perf/x86/intel: Replace x86_pmu.drain_pebs calling with static call
perf/x86: Fix NULL event access and potential PEBS record loss
perf/x86: Remove redundant is_x86_event() prototype
entry,unwind/deferred: Fix unwind_reset_info() placement
unwind_user/x86: Fix arch=um build
perf: Support deferred user unwind
unwind_user/x86: Teach FP unwind about start of function
...
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https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/wireguard-linux
Jason A. Donenfeld says:
====================
WireGuard updates for Linux 6.19-rc1.
Please find here Asbjørn's ynl series. This has been sitting in my
testing for the last week or so, since he sent out the latest series.
I've dropped the yml sample code, as he found an issue in that last
minute, but otherwise, we've sat on this code for long enough, so
let's see how it goes.
* tag 'wireguard-6.19-rc1-for-jakub' of https://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/wireguard-linux:
wireguard: netlink: generate netlink code
wireguard: uapi: generate header with ynl-gen
wireguard: uapi: move flag enums
wireguard: uapi: move enum wg_cmd
wireguard: netlink: add YNL specification
wireguard: netlink: lower .maxattr for WG_CMD_GET_DEVICE
wireguard: netlink: convert to split ops
wireguard: netlink: use WG_KEY_LEN in policies
wireguard: netlink: validate nested arrays in policy
wireguard: netlink: enable strict genetlink validation
====================
Link: https://patch.msgid.link/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
- klp-build livepatch module generation (Josh Poimboeuf)
Introduce new objtool features and a klp-build script to generate
livepatch modules using a source .patch as input.
This builds on concepts from the longstanding out-of-tree kpatch
project which began in 2012 and has been used for many years to
generate livepatch modules for production kernels. However, this is a
complete rewrite which incorporates hard-earned lessons from 12+
years of maintaining kpatch.
Key improvements compared to kpatch-build:
- Integrated with objtool: Leverages objtool's existing control-flow
graph analysis to help detect changed functions.
- Works on vmlinux.o: Supports late-linked objects, making it
compatible with LTO, IBT, and similar.
- Simplified code base: ~3k fewer lines of code.
- Upstream: No more out-of-tree #ifdef hacks, far less cruft.
- Cleaner internals: Vastly simplified logic for
symbol/section/reloc inclusion and special section extraction.
- Robust __LINE__ macro handling: Avoids false positive binary diffs
caused by the __LINE__ macro by introducing a fix-patch-lines
script which injects #line directives into the source .patch to
preserve the original line numbers at compile time.
- Disassemble code with libopcodes instead of running objdump
(Alexandre Chartre)
- Disassemble support (-d option to objtool) by Alexandre Chartre,
which supports the decoding of various Linux kernel code generation
specials such as alternatives:
17ef: sched_balance_find_dst_group+0x62f mov 0x34(%r9),%edx
17f3: sched_balance_find_dst_group+0x633 | <alternative.17f3> | X86_FEATURE_POPCNT
17f3: sched_balance_find_dst_group+0x633 | call 0x17f8 <__sw_hweight64> | popcnt %rdi,%rax
17f8: sched_balance_find_dst_group+0x638 cmp %eax,%edx
... jump table alternatives:
1895: sched_use_asym_prio+0x5 test $0x8,%ch
1898: sched_use_asym_prio+0x8 je 0x18a9 <sched_use_asym_prio+0x19>
189a: sched_use_asym_prio+0xa | <jump_table.189a> | JUMP
189a: sched_use_asym_prio+0xa | jmp 0x18ae <sched_use_asym_prio+0x1e> | nop2
189c: sched_use_asym_prio+0xc mov $0x1,%eax
18a1: sched_use_asym_prio+0x11 and $0x80,%ecx
... exception table alternatives:
native_read_msr:
5b80: native_read_msr+0x0 mov %edi,%ecx
5b82: native_read_msr+0x2 | <ex_table.5b82> | EXCEPTION
5b82: native_read_msr+0x2 | rdmsr | resume at 0x5b84 <native_read_msr+0x4>
5b84: native_read_msr+0x4 shl $0x20,%rdx
.... x86 feature flag decoding (also see the X86_FEATURE_POPCNT
example in sched_balance_find_dst_group() above):
2faaf: start_thread_common.constprop.0+0x1f jne 0x2fba4 <start_thread_common.constprop.0+0x114>
2fab5: start_thread_common.constprop.0+0x25 | <alternative.2fab5> | X86_FEATURE_ALWAYS | X86_BUG_NULL_SEG
2fab5: start_thread_common.constprop.0+0x25 | jmp 0x2faba <.altinstr_aux+0x2f4> | jmp 0x4b0 <start_thread_common.constprop.0+0x3f> | nop5
2faba: start_thread_common.constprop.0+0x2a mov $0x2b,%eax
... NOP sequence shortening:
1048e2: snapshot_write_finalize+0xc2 je 0x104917 <snapshot_write_finalize+0xf7>
1048e4: snapshot_write_finalize+0xc4 nop6
1048ea: snapshot_write_finalize+0xca nop11
1048f5: snapshot_write_finalize+0xd5 nop11
104900: snapshot_write_finalize+0xe0 mov %rax,%rcx
104903: snapshot_write_finalize+0xe3 mov 0x10(%rdx),%rax
... and much more.
- Function validation tracing support (Alexandre Chartre)
- Various -ffunction-sections fixes (Josh Poimboeuf)
- Clang AutoFDO (Automated Feedback-Directed Optimizations) support
(Josh Poimboeuf)
- Misc fixes and cleanups (Borislav Petkov, Chen Ni, Dylan Hatch, Ingo
Molnar, John Wang, Josh Poimboeuf, Pankaj Raghav, Peter Zijlstra,
Thorsten Blum)
* tag 'objtool-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
objtool: Fix segfault on unknown alternatives
objtool: Build with disassembly can fail when including bdf.h
objtool: Trim trailing NOPs in alternative
objtool: Add wide output for disassembly
objtool: Compact output for alternatives with one instruction
objtool: Improve naming of group alternatives
objtool: Add Function to get the name of a CPU feature
objtool: Provide access to feature and flags of group alternatives
objtool: Fix address references in alternatives
objtool: Disassemble jump table alternatives
objtool: Disassemble exception table alternatives
objtool: Print addresses with alternative instructions
objtool: Disassemble group alternatives
objtool: Print headers for alternatives
objtool: Preserve alternatives order
objtool: Add the --disas=<function-pattern> action
objtool: Do not validate IBT for .return_sites and .call_sites
objtool: Improve tracing of alternative instructions
objtool: Add functions to better name alternatives
objtool: Identify the different types of alternatives
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"Mutexes:
- Redo __mutex_init() to reduce generated code size (Sebastian
Andrzej Siewior)
Seqlocks:
- Introduce scoped_seqlock_read() (Peter Zijlstra)
- Change thread_group_cputime() to use scoped_seqlock_read() (Oleg
Nesterov)
- Change do_task_stat() to use scoped_seqlock_read() (Oleg Nesterov)
- Change do_io_accounting() to use scoped_seqlock_read() (Oleg
Nesterov)
- Fix the incorrect documentation of read_seqbegin_or_lock() /
need_seqretry() (Oleg Nesterov)
- Allow KASAN to fail optimizing (Peter Zijlstra)
Local lock updates:
- Fix all kernel-doc warnings (Randy Dunlap)
- Add the <linux/local_lock*.h> headers to MAINTAINERS (Sebastian
Andrzej Siewior)
- Reduce the risk of shadowing via s/l/__l/ and s/tl/__tl/ (Vincent
Mailhol)
Lock debugging:
- spinlock/debug: Fix data-race in do_raw_write_lock (Alexander
Sverdlin)
Atomic primitives infrastructure:
- atomic: Skip alignment check for try_cmpxchg() old arg (Arnd
Bergmann)
Rust runtime integration:
- sync: atomic: Enable generated Atomic<T> usage (Boqun Feng)
- sync: atomic: Implement Debug for Atomic<Debug> (Boqun Feng)
- debugfs: Remove Rust native atomics and replace them with Linux
versions (Boqun Feng)
- debugfs: Implement Reader for Mutex<T> only when T is Unpin (Boqun
Feng)
- lock: guard: Add T: Unpin bound to DerefMut (Daniel Almeida)
- lock: Pin the inner data (Daniel Almeida)
- lock: Add a Pin<&mut T> accessor (Daniel Almeida)"
* tag 'locking-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/local_lock: Fix all kernel-doc warnings
locking/local_lock: s/l/__l/ and s/tl/__tl/ to reduce the risk of shadowing
locking/local_lock: Add the <linux/local_lock*.h> headers to MAINTAINERS
locking/mutex: Redo __mutex_init() to reduce generated code size
rust: debugfs: Replace the usage of Rust native atomics
rust: sync: atomic: Implement Debug for Atomic<Debug>
rust: sync: atomic: Make Atomic*Ops pub(crate)
seqlock: Allow KASAN to fail optimizing
rust: debugfs: Implement Reader for Mutex<T> only when T is Unpin
seqlock: Change do_io_accounting() to use scoped_seqlock_read()
seqlock: Change do_task_stat() to use scoped_seqlock_read()
seqlock: Change thread_group_cputime() to use scoped_seqlock_read()
seqlock: Introduce scoped_seqlock_read()
documentation: seqlock: fix the wrong documentation of read_seqbegin_or_lock/need_seqretry
atomic: Skip alignment check for try_cmpxchg() old arg
rust: lock: Add a Pin<&mut T> accessor
rust: lock: Pin the inner data
rust: lock: guard: Add T: Unpin bound to DerefMut
locking/spinlock/debug: Fix data-race in do_raw_write_lock
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Use ynl-gen to generate the UAPI header for WireGuard.
The cosmetic changes in this patch confirms that the spec is aligned
with the implementation. By using the generated version, it ensures
that they stay in sync.
Changes in the generated header:
* Trivial header guard rename.
* Trivial white space changes.
* Trivial comment changes.
* Precompute bitflags in ynl-gen (see [1]).
* Drop __*_F_ALL constants (see [1]).
[1] https://lore.kernel.org/r/20251014123201.6ecfd146@kernel.org/
No behavioural changes intended.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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Move the wg*_flag enums, so they are defined above the attribute set
enums, where ynl-gen would place them.
This is an incremental step towards adopting an UAPI header generated
by ynl-gen. This is split out to keep the patches readable.
This is a trivial patch with no behavioural changes intended.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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This patch moves enum wg_cmd to the end of the file, where ynl-gen
would generate it.
This is an incremental step towards adopting an UAPI header generated
by ynl-gen. This is split out to keep the patches readable.
This is a trivial patch with no behavioural changes intended.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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This patch adds a near[1] complete YNL specification for WireGuard,
documenting the protocol in a machine-readable format, rather than
comments in wireguard.h, and eases usage from C and non-C programming
languages alike.
The generated C library will be featured in a later patch, so in
this patch I will use the in-kernel python client for examples.
This makes the documentation in the UAPI header redundant, it is
therefore removed. The in-line documentation in the spec is based
on the existing comment in wireguard.h, and once released it will
be available in the kernel documentation at:
https://docs.kernel.org/netlink/specs/wireguard.html
(until then run: make htmldocs)
Generate wireguard.rst from this spec:
$ make -C tools/net/ynl/generated/ wireguard.rst
Query wireguard interface through pyynl:
$ sudo ./tools/net/ynl/pyynl/cli.py --family wireguard \
--dump get-device \
--json '{"ifindex":3}'
[{'fwmark': 0,
'ifindex': 3,
'ifname': 'wg-test',
'listen-port': 54318,
'peers': [{0: {'allowedips': [{0: {'cidr-mask': 0,
'family': 2,
'ipaddr': '0.0.0.0'}},
{0: {'cidr-mask': 0,
'family': 10,
'ipaddr': '::'}}],
'endpoint': b'[...]',
'last-handshake-time': {'nsec': 42, 'sec': 42},
'persistent-keepalive-interval': 42,
'preshared-key': '[...]',
'protocol-version': 1,
'public-key': '[...]',
'rx-bytes': 42,
'tx-bytes': 42}}],
'private-key': '[...]',
'public-key': '[...]'}]
Add another allowed IP prefix:
$ sudo ./tools/net/ynl/pyynl/cli.py --family wireguard \
--do set-device --json '{"ifindex":3,"peers":[
{"public-key":"6a df b1 83 a4 ..","allowedips":[
{"cidr-mask":0,"family":10,"ipaddr":"::"}]}]}'
[1] As can be seen above, the "endpoint" is only dumped as binary data,
as it can't be fully described in YNL. It's either a struct
sockaddr_in or struct sockaddr_in6 depending on the attribute length.
Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull fd prepare updates from Christian Brauner:
"This adds the FD_ADD() and FD_PREPARE() primitive. They simplify the
common pattern of get_unused_fd_flags() + create file + fd_install()
that is used extensively throughout the kernel and currently requires
cumbersome cleanup paths.
FD_ADD() - For simple cases where a file is installed immediately:
fd = FD_ADD(O_CLOEXEC, vfio_device_open_file(device));
if (fd < 0)
vfio_device_put_registration(device);
return fd;
FD_PREPARE() - For cases requiring access to the fd or file, or
additional work before publishing:
FD_PREPARE(fdf, O_CLOEXEC, sync_file->file);
if (fdf.err) {
fput(sync_file->file);
return fdf.err;
}
data.fence = fd_prepare_fd(fdf);
if (copy_to_user((void __user *)arg, &data, sizeof(data)))
return -EFAULT;
return fd_publish(fdf);
The primitives are centered around struct fd_prepare. FD_PREPARE()
encapsulates all allocation and cleanup logic and must be followed by
a call to fd_publish() which associates the fd with the file and
installs it into the caller's fdtable. If fd_publish() isn't called,
both are deallocated automatically. FD_ADD() is a shorthand that does
fd_publish() immediately and never exposes the struct to the caller.
I've implemented this in a way that it's compatible with the cleanup
infrastructure while also being usable separately. IOW, it's centered
around struct fd_prepare which is aliased to class_fd_prepare_t and so
we can make use of all the basica guard infrastructure"
* tag 'vfs-6.19-rc1.fd_prepare.fs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (42 commits)
io_uring: convert io_create_mock_file() to FD_PREPARE()
file: convert replace_fd() to FD_PREPARE()
vfio: convert vfio_group_ioctl_get_device_fd() to FD_ADD()
tty: convert ptm_open_peer() to FD_ADD()
ntsync: convert ntsync_obj_get_fd() to FD_PREPARE()
media: convert media_request_alloc() to FD_PREPARE()
hv: convert mshv_ioctl_create_partition() to FD_ADD()
gpio: convert linehandle_create() to FD_PREPARE()
pseries: port papr_rtas_setup_file_interface() to FD_ADD()
pseries: convert papr_platform_dump_create_handle() to FD_ADD()
spufs: convert spufs_gang_open() to FD_PREPARE()
papr-hvpipe: convert papr_hvpipe_dev_create_handle() to FD_PREPARE()
spufs: convert spufs_context_open() to FD_PREPARE()
net/socket: convert __sys_accept4_file() to FD_ADD()
net/socket: convert sock_map_fd() to FD_ADD()
net/kcm: convert kcm_ioctl() to FD_PREPARE()
net/handshake: convert handshake_nl_accept_doit() to FD_PREPARE()
secretmem: convert memfd_secret() to FD_ADD()
memfd: convert memfd_create() to FD_ADD()
bpf: convert bpf_token_create() to FD_PREPARE()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Luiz Augusto von Dentz says:
====================
bluetooth-next pull request for net-next:
core:
- HCI: Add initial support for PAST
- hci_core: Introduce HCI_CONN_FLAG_PAST
- ISO: Add support to bind to trigger PAST
- HCI: Always use the identity address when initializing a connection
- ISO: Attempt to resolve broadcast address
- MGMT: Allow use of Set Device Flags without Add Device
- ISO: Fix not updating BIS sender source address
- HCI: Add support for LL Extended Feature Set
driver:
- btusb: Add new VID/PID 2b89/6275 for RTL8761BUV
- btusb: MT7920: Add VID/PID 0489/e135
- btusb: MT7922: Add VID/PID 0489/e170
- btusb: Add new VID/PID 13d3/3533 for RTL8821CE
- btusb: Add new VID/PID 0x0489/0xE12F for RTL8852BE-VT
- btusb: Add new VID/PID 0x13d3/0x3618 for RTL8852BE-VT
- btusb: Add new VID/PID 0x13d3/0x3619 for RTL8852BE-VT
- btusb: Reclassify Qualcomm WCN6855 debug packets
- btintel_pcie: Introduce HCI Driver protocol
- btintel_pcie: Support for S4 (Hibernate)
- btintel_pcie: Suspend/Resume: Controller doorbell interrupt handling
- dt-bindings: net: Convert Marvell 8897/8997 bindings to DT schema
- btbcm: Use kmalloc_array() to prevent overflow
- btrtl: Add the support for RTL8761CUV
- hci_h5: avoid sending two SYNC messages
- hci_h5: implement CRC data integrity
MAINTAINERS:
- Add Bartosz Golaszewski as Qualcomm hci_qca maintainer
* tag 'for-net-next-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next: (29 commits)
Bluetooth: btusb: Add new VID/PID 13d3/3533 for RTL8821CE
Bluetooth: HCI: Add support for LL Extended Feature Set
drivers/bluetooth: btbcm: Use kmalloc_array() to prevent overflow
Bluetooth: btintel_pcie: Introduce HCI Driver protocol
Bluetooth: btusb: add new custom firmwares
Bluetooth: btusb: Add new VID/PID 0x13d3/0x3619 for RTL8852BE-VT
Bluetooth: btusb: Add new VID/PID 0x13d3/0x3618 for RTL8852BE-VT
Bluetooth: btusb: Add new VID/PID 0x0489/0xE12F for RTL8852BE-VT
Bluetooth: iso: fix socket matching ambiguity between BIS and CIS
Bluetooth: MAINTAINERS: Add Bartosz Golaszewski as Qualcomm hci_qca maintainer
Bluetooth: btrtl: Add the support for RTL8761CUV
Bluetooth: Remove redundant pm_runtime_mark_last_busy() calls
dt-bindings: net: Convert Marvell 8897/8997 bindings to DT schema
Bluetooth: btusb: Reclassify Qualcomm WCN6855 debug packets
Bluetooth: btusb: Add new VID/PID 2b89/6275 for RTL8761BUV
Bluetooth: btintel_pcie: Suspend/Resume: Controller doorbell interrupt handling
Bluetooth: btintel_pcie: Support for S4 (Hibernate)
Bluetooth: btusb: MT7922: Add VID/PID 0489/e170
Bluetooth: btusb: MT7920: Add VID/PID 0489/e135
Bluetooth: ISO: Fix not updating BIS sender source address
...
====================
Link: https://patch.msgid.link/20251201213818.97249-1-luiz.dentz@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It turns out that HSR offloads are so fine-grained that many DSA
switches can do a small part even though they weren't specifically
designed for the protocols supported by that driver (HSR and PRP).
Specifically NETIF_F_HW_HSR_DUP - it is simple packet duplication on
transmit, towards all (aka 2) ports members of the HSR device.
For many DSA switches, we know how to duplicate a packet, even though we
never typically use that feature. The transmit port mask from the
tagging protocol can have multiple bits set, and the switch should send
the packet once to every port with a bit set from that mask.
Nonetheless, not all tagging protocols are like this, and sometimes the
port is a single numeric value rather than a bit mask. For that reason,
and also because switches can sometimes change tagging protocols for
different ones, we need to make HSR offload helpers opt-in.
For devices that can do nothing else HSR-specific, we introduce
dsa_port_simple_hsr_join() and dsa_port_simple_hsr_leave(). These
functions monitor when two user ports of the same switch are part of the
same HSR device, and when that condition is true, they toggle the
NETIF_F_HW_HSR_DUP feature flag of both net devices.
Normally only dsa_port_simple_hsr_join() and dsa_port_simple_hsr_leave()
are needed. The dsa_port_simple_hsr_validate() helper is just to see
what kind of configuration could be offloadable using the generic
helpers. This is used by switch drivers which are not currently using
the right tagging protocol to offload this HSR ring, but could in
principle offload it after changing the tagger.
Suggested-by: David Yang <mmyangfl@gmail.com>
Cc: "Alvin Šipraga" <alsi@bang-olufsen.dk>
Cc: Chester A. Unal" <chester.a.unal@arinc9.com>
Cc: "Clément Léger" <clement.leger@bootlin.com>
Cc: Daniel Golle <daniel@makrotopia.org>
Cc: DENG Qingfang <dqfext@gmail.com>
Cc: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: George McCollister <george.mccollister@gmail.com>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Jonas Gorski <jonas.gorski@gmail.com>
Cc: Kurt Kanzenbach <kurt@linutronix.de>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: UNGLinuxDriver@microchip.com
Cc: Woojung Huh <woojung.huh@microchip.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://patch.msgid.link/20251130131657.65080-6-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Since the introduction of HSR_PT_INTERLINK in commit 5055cccfc2d1 ("net:
hsr: Provide RedBox support (HSR-SAN)"), we see that different port
types require different settings for hardware offload, which was not the
case before when we only had HSR_PT_SLAVE_A and HSR_PT_SLAVE_B. But
there is currently no way to know which port is which type, so create
the hsr_get_port_type() API function and export it.
When hsr_get_port_type() is called from the device driver, the port can
must be found in the HSR port list. An important use case is for this
function to work from offloading drivers' NETDEV_CHANGEUPPER handler,
which is triggered by hsr_portdev_setup() -> netdev_master_upper_dev_link().
Therefore, we need to move the addition of the hsr_port to the HSR port
list prior to calling hsr_portdev_setup(). This makes the error
restoration path also more similar to hsr_del_port(), where
kfree_rcu(port) is already used.
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Łukasz Majewski <lukma@nabladev.com>
Link: https://patch.msgid.link/20251130131657.65080-3-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull autofs update from Christian Brauner:
"Prevent futile mount triggers in private mount namespaces.
Fix a problematic loop in autofs when a mount namespace contains
autofs mounts that are propagation private and there is no
namespace-specific automount daemon to handle possible automounting.
Previously, attempted path resolution would loop until MAXSYMLINKS was
reached before failing, causing significant noise in the log.
The fix adds a check in autofs ->d_automount() so that the VFS can
immediately return EPERM in this case. Since the mount is propagation
private, EPERM is the most appropriate error code"
* tag 'vfs-6.19-rc1.autofs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
autofs: dont trigger mount if it cant succeed
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull directory locking updates from Christian Brauner:
"This contains the work to add centralized APIs for directory locking
operations.
This series is part of a larger effort to change directory operation
locking to allow multiple concurrent operations in a directory. The
ultimate goal is to lock the target dentry(s) rather than the whole
parent directory.
To help with changing the locking protocol, this series centralizes
locking and lookup in new helper functions. The helpers establish a
pattern where it is the dentry that is being locked and unlocked
(currently the lock is held on dentry->d_parent->d_inode, but that can
change in the future).
This also changes vfs_mkdir() to unlock the parent on failure, as well
as dput()ing the dentry. This allows end_creating() to only require
the target dentry (which may be IS_ERR() after vfs_mkdir()), not the
parent"
* tag 'vfs-6.19-rc1.directory.locking' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
nfsd: fix end_creating() conversion
VFS: introduce end_creating_keep()
VFS: change vfs_mkdir() to unlock on failure.
ecryptfs: use new start_creating/start_removing APIs
Add start_renaming_two_dentries()
VFS/ovl/smb: introduce start_renaming_dentry()
VFS/nfsd/ovl: introduce start_renaming() and end_renaming()
VFS: add start_creating_killable() and start_removing_killable()
VFS: introduce start_removing_dentry()
smb/server: use end_removing_noperm for for target of smb2_create_link()
VFS: introduce start_creating_noperm() and start_removing_noperm()
VFS/nfsd/cachefiles/ovl: introduce start_removing() and end_removing()
VFS/nfsd/cachefiles/ovl: add start_creating() and end_creating()
VFS: tidy up do_unlinkat()
VFS: introduce start_dirop() and end_dirop()
debugfs: rename end_creating() to debugfs_end_creating()
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull directory delegations update from Christian Brauner:
"This contains the work for recall-only directory delegations for
knfsd.
Add support for simple, recallable-only directory delegations. This
was decided at the fall NFS Bakeathon where the NFS client and server
maintainers discussed how to merge directory delegation support.
The approach starts with recallable-only delegations for several reasons:
1. RFC8881 has gaps that are being addressed in RFC8881bis. In
particular, it requires directory position information for
CB_NOTIFY callbacks, which is difficult to implement properly
under Linux. The spec is being extended to allow that information
to be omitted.
2. Client-side support for CB_NOTIFY still lags. The client side
involves heuristics about when to request a delegation.
3. Early indication shows simple, recallable-only delegations can
help performance. Anna Schumaker mentioned seeing a multi-minute
speedup in xfstests runs with them enabled.
With these changes, userspace can also request a read lease on a
directory that will be recalled on conflicting accesses. This may be
useful for applications like Samba. Users can disable leases
altogether via the fs.leases-enable sysctl if needed.
VFS changes:
- Dedicated Type for Delegations
Introduce struct delegated_inode to track inodes that may have
delegations that need to be broken. This replaces the previous
approach of passing raw inode pointers through the delegation
breaking code paths, providing better type safety and clearer
semantics for the delegation machinery.
- Break parent directory delegations in open(..., O_CREAT) codepath
- Allow mkdir to wait for delegation break on parent
- Allow rmdir to wait for delegation break on parent
- Add try_break_deleg calls for parents to vfs_link(), vfs_rename(),
and vfs_unlink()
- Make vfs_create(), vfs_mknod(), and vfs_symlink() break delegations
on parent directory
- Clean up argument list for vfs_create()
- Expose delegation support to userland
Filelock changes:
- Make lease_alloc() take a flags argument
- Rework the __break_lease API to use flags
- Add struct delegated_inode
- Push the S_ISREG check down to ->setlease handlers
- Lift the ban on directory leases in generic_setlease
NFSD changes:
- Allow filecache to hold S_IFDIR files
- Allow DELEGRETURN on directories
- Wire up GET_DIR_DELEGATION handling
Fixes:
- Fix kernel-doc warnings in __fcntl_getlease
- Add needed headers for new struct delegation definition"
* tag 'vfs-6.19-rc1.directory.delegations' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
vfs: add needed headers for new struct delegation definition
filelock: __fcntl_getlease: fix kernel-doc warnings
vfs: expose delegation support to userland
nfsd: wire up GET_DIR_DELEGATION handling
nfsd: allow DELEGRETURN on directories
nfsd: allow filecache to hold S_IFDIR files
filelock: lift the ban on directory leases in generic_setlease
vfs: make vfs_symlink break delegations on parent dir
vfs: make vfs_mknod break delegations on parent directory
vfs: make vfs_create break delegations on parent directory
vfs: clean up argument list for vfs_create()
vfs: break parent dir delegations in open(..., O_CREAT) codepath
vfs: allow rmdir to wait for delegation break on parent
vfs: allow mkdir to wait for delegation break on parent
vfs: add try_break_deleg calls for parents to vfs_{link,rename,unlink}
filelock: push the S_ISREG check down to ->setlease handlers
filelock: add struct delegated_inode
filelock: rework the __break_lease API to use flags
filelock: make lease_alloc() take a flags argument
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Add support for reading Signal Quality Indicator (SQI) and enhanced SQI+
from OATC14 10Base-T1S PHYs.
- Introduce MDIO register definitions for DCQ_SQI and DCQ_SQIPLUS.
- Add `genphy_c45_oatc14_get_sqi_max()` to return the maximum supported
SQI/SQI+ level.
- Add `genphy_c45_oatc14_get_sqi()` to return the current SQI or SQI+
value.
- Update `include/linux/phy.h` to expose the new APIs.
SQI+ capability is read from the Advanced Diagnostic Features Capability
register (ADFCAP). If SQI+ is supported, the driver calculates the value
from the MSBs of the DCQ_SQIPLUS register; otherwise, it falls back to
basic SQI (0-7 levels). This enables ethtool to report the SQI value for
OATC14 10Base-T1S PHYs.
Open Alliance TC14 10BASE-T1S Advanced Diagnostic PHY Features
Specification ref:
https://opensig.org/wp-content/uploads/2025/06/OPEN_Alliance_10BASE-T1S_Advanced_PHY_features_for-automotive_Ethernet_V2.1b.pdf
Signed-off-by: Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20251201032346.6699-2-parthiban.veerasooran@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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