kernel/git/stable/linux.git/arch/arm/mach-rpc, branch master

ARM: mark RiscPC as deprecated

2026-07-03T18:36:07+00:00

This platform is the oldest still supported machine, dating back to the original 1994 ARM610 version. The only currently supported configuration uses an ARMv4 StrongARM but still requires building for ARMv3 because of the board design not supporting 16-bit data access. ARMv3 support has been removed in gcc-9, and the gcc-8 release is already old but still supported for building the kernel. The only set of machines that lacks support for 16-bit load/store instructions (Alpha EV5 and older) was recently removed from the kernel. Since there is little hope of this being maintainable much longer, plan to remove it in early 2027 while it is still expected to mostly work. Signed-off-by: Arnd Bergmann

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

ARM: riscpc: make ecard_bus_type constant

2025-01-10T14:42:06+00:00

Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type a const *"), the driver core can properly handle constant struct bus_type, move the ecard_bus_type variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Suggested-by: Greg Kroah-Hartman Signed-off-by: Kunwu Chan Reviewed-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20240823081444.150976-1-kunwu.chan@linux.dev Signed-off-by: Greg Kroah-Hartman

ARM: riscpc: ecard: Fix the build

2024-08-13T09:34:52+00:00

Fix a recently introduced build failure. Cc: Russell King Fixes: d69d80484598 ("driver core: have match() callback in struct bus_type take a const *") Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20240805232026.65087-2-bvanassche@acm.org Signed-off-by: Greg Kroah-Hartman

lazy tlb: introduce lazy tlb mm refcount helper functions

2023-03-28T23:20:08+00:00

Add explicit _lazy_tlb annotated functions for lazy tlb mm refcounting. This makes the lazy tlb mm references more obvious, and allows the refcounting scheme to be modified in later changes. There is no functional change with this patch. Link: https://lkml.kernel.org/r/20230203071837.1136453-3-npiggin@gmail.com Signed-off-by: Nicholas Piggin Acked-by: Linus Torvalds Cc: Andy Lutomirski Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: Michael Ellerman Cc: Nadav Amit Cc: Peter Zijlstra Cc: Rik van Riel Cc: Will Deacon Signed-off-by: Andrew Morton

ARM: Kconfig: clean up platform selection

2022-08-18T14:44:59+00:00

The top-level platform selection is mostly meaningless these days after almost everything is sorted below the CONFIG_ARCH_MULTIPLATFORM, with the only exception being the 20+ year old StrongARM based machines. Make this more consistent by removing the entire choice statement and moving the StrongARM specific options into regular platform specific Kconfig files. The three platforms (footbridge, rpc and sa1100) are still mutually exclusive and cannot coexist with other ARMv4/v5 machines, but since there are only three of them and we will not add more, this can be expressed using Kconfig 'depends on' statements. Signed-off-by: Arnd Bergmann

ARM: remove obsolete Makefile.boot infrastructure

2022-08-18T14:44:59+00:00

There are a number of old Makefile.boot files that remain from the multiplatform conversion, and three that are still in use. These provide the "ZRELADDR", "PARAMS_PHYS" and "INITRD_PHYS" values that are platform specific. It turns out that we can generally just derive this from information that is available elsewhere: - ZRELADDR is normally detected at runtime with the CONFIG_AUTO_ZRELADDR flag, but also needed to be passed to for 'make uImage'. In a multiplatform kernel, one always has to pass this as the $(LOADADDR) variable, but in the StrongARM kernels we can derive it from the sum of $(CONFIG_PHYS_OFFSET) and $(TEXT_OFFSET) that are already known. - PARAMS_PHYS and INITRD_PHYS are only used for bootpImage, which in turn is only used for the pre-ATAGS 'param_struct' based boot interface on StrongARM based machines with old boot loaders. They can both be derived from CONFIG_PHYS_OFFSET and a machine specific offset for the initrd, so all of the logic for these can be part of arch/arm/boot/bootp/Makefile. Signed-off-by: Arnd Bergmann

ARM: riscpc: use GENERIC_IRQ_MULTI_HANDLER

2021-12-03T17:43:38+00:00

This is one of the last platforms using the old entry path. While this code path is spread over a few files, it is fairly straightforward to convert it into an equivalent C version, leaving the existing algorithm and all the priority handling the same. Unlike most irqchip drivers, this means reading the status register(s) in a loop and always handling the highest-priority irq first. The IOMD_IRQREQC and IOMD_IRQREQD registers are not actaully used here, but I left the code in place for the time being, to keep the conversion as direct as possible. It could be removed in a cleanup on top. Signed-off-by: Arnd Bergmann [ardb: drop obsolete IOMD_IRQREQC/IOMD_IRQREQD handling] Signed-off-by: Ard Biesheuvel Tested-by: Marc Zyngier Tested-by: Vladimir Murzin # ARMv7M

Merge tag 'printk-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2021-09-02T01:41:13+00:00

Pull printk updates from Petr Mladek: - Optionally, provide an index of possible printk messages via /printk/index/. It can be used when monitoring important kernel messages on a farm of various hosts. The monitor has to be updated when some messages has changed or are not longer available by a newly deployed kernel. - Add printk.console_no_auto_verbose boot parameter. It allows to generate crash dump even with slow consoles in a reasonable time frame. - Remove printk_safe buffers. The messages are always stored directly to the main logbuffer, even in NMI or recursive context. Also it allows to serialize syslog operations by a mutex instead of a spin lock. - Misc clean up and build fixes. * tag 'printk-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk/index: Fix -Wunused-function warning lib/nmi_backtrace: Serialize even messages about idle CPUs printk: Add printk.console_no_auto_verbose boot parameter printk: Remove console_silent() lib/test_scanf: Handle n_bits == 0 in random tests printk: syslog: close window between wait and read printk: convert @syslog_lock to mutex printk: remove NMI tracking printk: remove safe buffers printk: track/limit recursion lib/nmi_backtrace: explicitly serialize banner and regs printk: Move the printk() kerneldoc comment to its new home printk/index: Fix warning about missing prototypes MIPS/asm/printk: Fix build failure caused by printk printk: index: Add indexing support to dev_printk printk: Userspace format indexing support printk: Rework parse_prefix into printk_parse_prefix printk: Straighten out log_flags into printk_info_flags string_helpers: Escape double quotes in escape_special printk/console: Check consistent sequence number when handling race in console_unlock()