wireguard-linux/arch/arm/Kconfig, branch stable

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux

2026-08-30T16:43:01Z

Pull arm updates from Russell King: "Updates for 7.3: - add module description for kprobes testing module - remove references to CONFIG_CPU_ARM92x_CPU_IDLE options - expand comment in ARM's __switch_to() Also a number of fixes that missed 7.2: - disable broken eBPF on RiscPC - more BKPT fixes (guys, it's a *very* bad idea when everyone uses the BKPT instruction for their own differing purposes) - another preempt-rt fix, this time for siglock / CPU timers - fix another path where we try to send signals to processes with interrupts disabled - acquire mmap write lock for show_pte() with user faults" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux: ARM: 9480/1: entry: expand comment in __switch_to ARM: 9478/1: Remove references to removed CONFIG_CPU_ARM92x_CPU_IDLE options ARM: 9485/1: mm: acquire mmap write lock around show_pte() for user faults ARM: 9484/1: enable interrupts when unhandled user faults are triggered ARM: 9483/1: select HAVE_POSIX_CPU_TIMERS_TASK_WORK ARM: 9481/2: breakpoint: CFI breakpoints only on demand ARM: 9477/1: Disable broken eBPF JIT on the Risc PC ARM: 9473/1: kprobes: test: add MODULE_DESCRIPTION

Merge tag 'soc-arm-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2026-08-19T02:50:40Z

Pull ARM SoC platform updates from Arnd Bergmann: "The 32-bit Arm platforms are a bit more interesting this time: I refreshed an earlier series to mark code as deprecated that does have the tendency of getting in the way of cleanups and new features but has close to zero users. Among these are: - 22 of the remaining 28 legacy board files that predate the current devicetree based descriptions, using old chips from Intel and Marvell. The remaining six board files are for TI OMAP1 and Samsung s3c64xx chips and all still have known users. - support for Cortex-M3/M4/M7 and ARM1136r0 CPU cores and the 25 machines based on these. These all use devicetree but the CPU support causes disproportional work. Most of them are just reference boards, the notable exceptions being the Nokia N800/N810 tablet and the Buglabs BUG platform. - be8, be32, oabi and iwmmxt userspace binaries, which were mostly associated with the platforms now scheduled for removal and are increasingly problematic to support with modern toolchains. Nothing is actually removed at this point, to ensure that any remaining users continue to have the 7.3-LTS for a while longer. Patches for removal are currently being tested. Other updates include a continued work to convert GPIO number based interfaces to descriptors, a patch to restore little-endian mode on the one Arm platform (ixp4xx) that only worked in big-endian mode recently, and some minor cleanups and bugfixes" * tag 'soc-arm-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (41 commits) MAINTAINERS: Drop redundant lists from various Samsung entries ARM: tegra: Replace __ASSEMBLY__ with __ASSEMBLER__ ARM: tegra: Fix OF node reference leaks in IRQ init ARM: lpc32xx: remove a few manually populated OF devices ARM: lpc32xx: only run SoC init on LPC32xx hardware firmware: imx: scu: manage mailbox channels and global handle ARM: sa1100: h3xxx: convert gpio-keys to use software nodes ARM: sa1100: collie: convert gpio-keys to use software nodes ARM: sa1100: assabet: convert gpio-keys to use software nodes gpio: sa1100: register software node for GPIO controller ARM: ixp4xx: Relax endianness ARM: replace linux/gpio.h inclusions soc: imx9: devm_kasprintf error handling ARM: mark mv78xx0 support as deprecated ARM: mark axxia platform as deprecated ARM: mark Cortex-M3/M4/M7 based boards as deprecated ARM: mark footbridge as deprecated ARM: mark RiscPC as deprecated ARM: mark mach-sa1100 as deprecated ARM: orion5x: mark all board files as deprecated ...

ARM: 9483/1: select HAVE_POSIX_CPU_TIMERS_TASK_WORK

2026-08-05T15:14:44Z

Commit c6e61c06d606 ("ARM: 9463/1: Allow to enable RT") enabled PREEMPT_RT on ARM but did not select HAVE_POSIX_CPU_TIMERS_TASK_WORK. This leaves CONFIG_POSIX_CPU_TIMERS_TASK_WORK disabled, so CPU timers expire in hard IRQ context. On PREEMPT_RT this makes run_posix_cpu_timers() take the sleeping sighand->siglock: BUG: sleeping function called from invalid context at spinlock_rt.c:48 rt_spin_lock from lock_task_sighand lock_task_sighand from run_posix_cpu_timers run_posix_cpu_timers from update_process_times ARM handles TIF_NOTIFY_RESUME on all return-to-user paths, including v7-M. ARM32 KVM host support was removed by commit 541ad0150ca4 ("arm: Remove 32bit KVM host support"), so the select need not be conditional on KVM. Select it to defer POSIX CPU timer expiry to task context. Reproduced with setrlimit(RLIMIT_CPU, ...) and a busy loop. The same path is used by setitimer(ITIMER_PROF or ITIMER_VIRTUAL) and POSIX CPU timers created with timer_create(). Assisted-by: Claude:claude-fable-5 Fixes: c6e61c06d606 ("ARM: 9463/1: Allow to enable RT") Signed-off-by: Karl Mehltretter Reviewed-by: Arnd Bergmann Reviewed-by: Sebastian Andrzej Siewior Signed-off-by: Russell King

ARM: 9477/1: Disable broken eBPF JIT on the Risc PC

2026-08-05T15:12:24Z

The eBPF JIT unconditionally generates ldrh/strh instructions, which do not function correctly on the Risc PC because its bus is unable to signal half-word accesses. Work around this issue by disabling the eBPF JIT when building for ARMv3 (the Risc PC is the only currently supported machine whose kernel is built for ARMv3). Comments from Ethan Nelson-Moore: From LKML: https://lore.kernel.org/all/CAD++jL=0qYGoygUwGEXQL7C_ROnC7kfpRv8RA+H5tNWwYu+pQA@mail.gmail.com/ The commit message has been updated slightly relative to the version on LKML to clarify that the Risc PC is not actually ARMv3. Fixes: 39c13c204bb1 ("arm: eBPF JIT compiler") Cc: stable@vger.kernel.org Signed-off-by: Ethan Nelson-Moore Reviewed-by: Linus Walleij Signed-off-by: Russell King

calibrate: Rework delay timer calibration

2026-07-15T13:04:55Z

The header define in asm/timex,h and the naming of the function to read the delay timer are confusing at best. Convert it to a config switch selected by the archictures which provide the functionality and rename the function to delay_read_timer(), which makes the purpose clear. Move the declaration to linux/delay.h where it belongs. Remove the resulting empty asm/timex.h files as well. No functional change. Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20260410120317.978403520@kernel.org

ARM: mark Cortex-M3/M4/M7 based boards as deprecated

2026-07-10T21:21:50Z

The Cortex-M3/M4/M7 cores were designed as a replacement for the earlier ARM7TDMI and ARM9TDMI microarchitectures used in older microcontrollers. At the moment, Linux can run these cores either when they are integrated into a larger SoC, or as standalone microcontrollers. While there was a lot of development work going into Cortex-M support from 2011 to 2016, this largely stopped when it became clear that Zephyr and other RTOS had taken over that market. To date, the only Cortex-M based based microcontroller boards supported upstream are reference implementations. Schedule these for removal after the next LTS kernel, so if any users remain that want to update their kernels, they can stay on that version for a few years before having to maintain the platform support out of tree. Acked-by: Vladimir Zapolskiy # NXP LPC18xx/LPC43xx Acked-by: Vladimir Murzin # MPS2 Acked-by: Nicolas Ferre Acked-by: Frank Li # i.MX Signed-off-by: Arnd Bergmann

ARM: mark IWMMXT as deprecated

2026-07-03T18:36:07Z

With no remaining users and support getting removed from future compilers, there seems little point in keeping iwmmxt around much longer. On the other hand, the iwmmxt support in the kernel rarely gets in the way, so there is little cost, so set a removal date of early 2027 for the moment. If anyone is still using this, it can be extended as long there is binutils support. Signed-off-by: Arnd Bergmann

ARM: update FPE_NWFPE help text

2026-07-03T18:36:07Z

The help text is seriously outdated and predates the introduction of VFP floating point units that were available as early as some ARM926 based systems. Change the help text to reflect that this is now a legacy feature and that it will go away along with OABI support in the future. Acked-by: Linus Walleij Acked-by: Ralph Siemsen Signed-off-by: Arnd Bergmann

ARM: update DEPRECATED_PARAM_STRUCT removal timeline

2026-07-03T18:36:07Z

This configuration option is for the older boot method that preceeded ATAGS. This was scheduled for removal back in 2001, but the removal never happened, presumably because nobody cared enough to actually do it, not because there are any users left. Add "(DEPRECATED)' to the Kconfig line and update the timeline so we can remove it next year along with the other options that are not scheduled for that timeframe. Acked-by: Linus Walleij Signed-off-by: Arnd Bergmann

ARM: turn CONFIG_ATAGS off by default

2026-07-03T18:36:07Z

Only a very small number of machines remain that rely on traditional board files with the ATAGS boot data instead of devicetree, and we have not accepted new ones for a decade. Most of the remaining ones are on their way out of the kernel, but the Kconfig option that controls ATAGS is still enabled by default. To reflect the actual status of ATAGS support and alert the remaining users of upstream and out-of-tree platforms with this, change it to being default-disabled and add a dependency on CONFIG_EXPERT. The board specific defconfig files that rely on ATAGS are changed to turn on both EXPERT and ATAGS if they were not doing that already, and the ones that explicitly turned it off before no longer need to. Acked-by: Linus Walleij Reviewed-by: Ethan Nelson-Moore Acked-by: Aaro Koskinen # OMAP Signed-off-by: Arnd Bergmann