mips: mm: enable MMU_GATHER_RCU_TABLE_FREE

On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of
empty PTE page table pages (such as 100GB+). To resolve this problem,
first enable

mips: mm: enable MMU_GATHER_RCU_TABLE_FREE

On a 64-bit system, madvise(MADV_DONTNEED) may cause a large number of
empty PTE page table pages (such as 100GB+). To resolve this problem,
first enable MMU_GATHER_RCU_TABLE_FREE to prepare for enabling the
PT_RECLAIM feature, which resolves this problem.

Link: https://lkml.kernel.org/r/0d17f00a724f77aaca2da7c847acd490c3a47571.1769515122.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand (Red Hat) <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Lance Yang <ioworker0@gmail.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Magnus Lindholm <linmag7@gmail.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Gleixner <tglx@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

show more ...

MIPS: Fix HOTPLUG_PARALLEL dependency

With MIPS, it is possible to have SMP enabled without HOTPLUG_CPU
selected. However, in kernel/cpu.c, some code that uses
HOTPLUG_PARALLEL also requires HOTPLUG

MIPS: Fix HOTPLUG_PARALLEL dependency

With MIPS, it is possible to have SMP enabled without HOTPLUG_CPU
selected. However, in kernel/cpu.c, some code that uses
HOTPLUG_PARALLEL also requires HOTPLUG_CPU to be selected. Therefore,
we should fix the HOTPLUG_PARALLEL dependency to depend on
HOTPLUG_CPU, not just SMP.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202510270120.21wA1aX1-lkp@intel.com/
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

show more ...

Merge tag 'mips_6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

- switch longson32 platform to DT and use MIPS_GENERIC framework

- c

Merge tag 'mips_6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

- switch longson32 platform to DT and use MIPS_GENERIC framework

- cleanups/fixes for lantiq DTs

- other cleanups and fixes

* tag 'mips_6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (30 commits)
mips: math-emu: replace deprecated strcpy() in me-debugfs
MIPS: configs: Consolidate Loongson1 defconfigs
MIPS: Unify Loongson1 PRID_REV
MIPS: loongson32: Switch to generic core
MIPS: loongson: Add built-in DTB support
MIPS: dts: loongson: Add CQ-T300B board
MIPS: dts: loongson: Add Smartloong-1C board
MIPS: dts: loongson: Add LSGZ_1B_DEV board
MIPS: dts: loongson: Add LS1B-DEMO board
dt-bindings: mips: loongson: Add LS1B-DEMO and CQ-T300B
mips: lantiq: danube: rename stp node on EASY50712 reference board
mips: lantiq: xway: sysctrl: rename stp clock
MIPS: RB532: Replace deprecated strcpy() with memcpy() and strscpy()
MIPS: Loongson64: Replace deprecated strcpy() with strscpy_pad()
MIPS: generic: Replace deprecated strcpy() in ocelot_detect()
MIPS: octeon: Replace deprecated strcpy() in octeon_model_get_string_buffer()
MIPS: octeon: Replace memset(0) + deprecated strcpy() with strscpy_pad()
MIPS: arc: Replace deprecated strcpy() with memcpy()
MIPS: txx9: Replace deprecated strcpy() with strscpy()
MIPS: sni: Replace deprecated strcpy() in sni_console_setup()
...

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Merge tag 'kbuild-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

Pull Kbuild updates from Nathan Chancellor:

- Extend modules.builtin.modinfo to include module aliases from

Merge tag 'kbuild-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

Pull Kbuild updates from Nathan Chancellor:

- Extend modules.builtin.modinfo to include module aliases from
MODULE_DEVICE_TABLE for builtin modules so that userspace tools (such
as kmod) can verify that a particular module alias will be handled by
a builtin module

- Bump the minimum version of LLVM for building the kernel to 15.0.0

- Upgrade several userspace API checks in headers_check.pl to errors

- Unify and consolidate CONFIG_WERROR / W=e handling

- Turn assembler and linker warnings into errors with CONFIG_WERROR /
W=e

- Respect CONFIG_WERROR / W=e when building userspace programs
(userprogs)

- Enable -Werror unconditionally when building host programs
(hostprogs)

- Support copy_file_range() and data segment alignment in gen_init_cpio
to improve performance on filesystems that support reflinks such as
btrfs and XFS

- Miscellaneous small changes to scripts and configuration files

* tag 'kbuild-6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (47 commits)
modpost: Initialize builtin_modname to stop SIGSEGVs
Documentation: kbuild: note CONFIG_DEBUG_EFI in reproducible builds
kbuild: vmlinux.unstripped should always depend on .vmlinux.export.o
modpost: Create modalias for builtin modules
modpost: Add modname to mod_device_table alias
scsi: Always define blogic_pci_tbl structure
kbuild: extract modules.builtin.modinfo from vmlinux.unstripped
kbuild: keep .modinfo section in vmlinux.unstripped
kbuild: always create intermediate vmlinux.unstripped
s390: vmlinux.lds.S: Reorder sections
KMSAN: Remove tautological checks
objtool: Drop noinstr hack for KCSAN_WEAK_MEMORY
lib/Kconfig.debug: Drop CLANG_VERSION check from DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
riscv: Remove ld.lld version checks from many TOOLCHAIN_HAS configs
riscv: Unconditionally use linker relaxation
riscv: Remove version check for LTO_CLANG selects
powerpc: Drop unnecessary initializations in __copy_inst_from_kernel_nofault()
mips: Unconditionally select ARCH_HAS_CURRENT_STACK_POINTER
arm64: Remove tautological LLVM Kconfig conditions
ARM: Clean up definition of ARM_HAS_GROUP_RELOCS
...

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Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull VDSO updates from Thomas Gleixner:

- Further consolidation of the VDSO infrastructure and the commo

Merge tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull VDSO updates from Thomas Gleixner:

- Further consolidation of the VDSO infrastructure and the common data
store

- Simplification of the related Kconfig logic

- Improve the VDSO selftest suite

* tag 'timers-vdso-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests: vDSO: Drop vdso_test_clock_getres
selftests: vDSO: vdso_test_abi: Add tests for clock_gettime64()
selftests: vDSO: vdso_test_abi: Test CPUTIME clocks
selftests: vDSO: vdso_test_abi: Use explicit indices for name array
selftests: vDSO: vdso_test_abi: Drop clock availability tests
selftests: vDSO: vdso_test_abi: Use ksft_finished()
selftests: vDSO: vdso_test_abi: Correctly skip whole test with missing vDSO
selftests: vDSO: Fix -Wunitialized in powerpc VDSO_CALL() wrapper
vdso: Add struct __kernel_old_timeval forward declaration to gettime.h
vdso: Gate VDSO_GETRANDOM behind HAVE_GENERIC_VDSO
vdso: Drop Kconfig GENERIC_VDSO_TIME_NS
vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE
vdso: Drop kconfig GENERIC_COMPAT_VDSO
vdso: Drop kconfig GENERIC_VDSO_32
riscv: vdso: Untangle Kconfig logic
time: Build generic update_vsyscall() only with generic time vDSO
vdso/gettimeofday: Remove !CONFIG_TIME_NS stubs
vdso: Move ENABLE_COMPAT_VDSO from core to arm64
ARM: VDSO: Remove cntvct_ok global variable
vdso/datastore: Gate time data behind CONFIG_GENERIC_GETTIMEOFDAY

show more ...

vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE

All users of the generic vDSO library also use the generic vDSO datastore.

Remove the now unnecessary Kconfig symbol.

Signed-off-by: Thomas Weißschuh <th

vdso: Drop Kconfig GENERIC_VDSO_DATA_STORE

All users of the generic vDSO library also use the generic vDSO datastore.

Remove the now unnecessary Kconfig symbol.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-9-d9b65750e49f@linutronix.de

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sched: Unify the SCHED_{SMT,CLUSTER,MC} Kconfig

Like many Kconfig symbols, SCHED_{SMT,CLUSTER,MC} are duplicated
across arch/*/Kconfig. Try and clean up a little.

Suggested-by: Christophe Leroy <ch

sched: Unify the SCHED_{SMT,CLUSTER,MC} Kconfig

Like many Kconfig symbols, SCHED_{SMT,CLUSTER,MC} are duplicated
across arch/*/Kconfig. Try and clean up a little.

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Tested-by: Shrikanth Hegde <sshegde@linux.ibm.com> # powerpc
Link: https://lkml.kernel.org/r/20250826094358.GG3245006@noisy.programming.kicks-ass.net

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MIPS: loongson32: Switch to generic core

The generic MIPS core is fully compatible with Loongson-1 SoCs,
so migrate Loongson-1 to it.

Main changes are:
- Merge CPU_LOONGSON1B and CPU_LOONGSON1C in

MIPS: loongson32: Switch to generic core

The generic MIPS core is fully compatible with Loongson-1 SoCs,
so migrate Loongson-1 to it.

Main changes are:
- Merge CPU_LOONGSON1B and CPU_LOONGSON1C into a unified CPU_LOONGSON32,
as both are based on the GS232 core.
- Consolidate LOONGSON1_LS1B and LOONGSON1_LS1C Kconfig options into
MACH_LOONGSON32.
- Enable MACH_GENERIC_CORE and remove the legacy custom implementation.
- Remove all Loongson-1 platform devices and associated code,
which are now obsolete due to Device Tree support.
- Misc cleanup.

Partially based on earlier work by Jiaxun Yang.

Link: https://lore.kernel.org/all/20190411121915.8040-4-jiaxun.yang@flygoat.com/
Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

show more ...

mips: Unconditionally select ARCH_HAS_CURRENT_STACK_POINTER

Now that the minimum supported version of LLVM for building the kernel
has been bumped to 15.0.0, the selection of
ARCH_HAS_CURRENT_STACK_

mips: Unconditionally select ARCH_HAS_CURRENT_STACK_POINTER

Now that the minimum supported version of LLVM for building the kernel
has been bumped to 15.0.0, the selection of
ARCH_HAS_CURRENT_STACK_POINTER can be made unconditional since it is
always true.

Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/r/20250821-bump-min-llvm-ver-15-v2-5-635f3294e5f0@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

show more ...

Merge tag 'mips_6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

- DT updates for ralink, mobileye and atheros/qualcomm

- Clean up of

Merge tag 'mips_6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

- DT updates for ralink, mobileye and atheros/qualcomm

- Clean up of mc146818 usage

- Speed up delay calibration for CPS

- Other cleanups and fixes

* tag 'mips_6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (50 commits)
MIPS: Don't use %pK through printk
MIPS: Update Joshua Kinard's e-mail address
MIPS: mobileye: dts: eyeq5,eyeq6h: rename the emmc controller
MIPS: mm: tlb-r4k: Uniquify TLB entries on init
MIPS: SGI-IP27: Delete an unnecessary check before kfree() in hub_domain_free()
mips/malta,loongson2ef: use generic mc146818_get_time function
mips: remove redundant macro mc146818_decode_year
mips/mach-rm: remove custom mc146818rtc.h file
mips: remove unused function mc146818_set_rtc_mmss
MIPS: CPS: Optimise delay CPU calibration for SMP
MIPS: CPS: Improve mips_cps_first_online_in_cluster()
MIPS: disable MMID when not supported by the hardware
MIPS: eyeq5_defconfig: add I2C subsystem, driver and temp sensor driver
MIPS: eyeq5_defconfig: add GPIO subsystem & driver
MIPS: mobileye: eyeq5: add two GPIO bank nodes
MIPS: mobileye: eyeq5: add evaluation board I2C temp sensor
MIPS: mobileye: eyeq5: add 5 I2C controller nodes
MIPS: eyeq5_defconfig: Update for v6.16-rc1
MIPS: vpe-mt: add missing prototypes for vpe_{alloc,start,stop,free}
mips: boot: use 'targets' instead of extra-y in Makefile
...

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Merge tag 'ftrace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull ftrace updates from Steven Rostedt:

- Keep track of when fgraph_ops are registered or not

Keep

Merge tag 'ftrace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull ftrace updates from Steven Rostedt:

- Keep track of when fgraph_ops are registered or not

Keep accounting of when fgraph_ops are registered as if a fgraph_ops
is registered twice it can mess up the accounting and it will not
work as expected later. Trigger a warning if something registers it
twice as to catch bugs before they are found by things just not
working as expected.

- Make DYNAMIC_FTRACE always enabled for architectures that support it

As static ftrace (where all functions are always traced) is very
expensive and only exists to help architectures support ftrace, do
not make it an option. As soon as an architecture supports
DYNAMIC_FTRACE make it use it. This simplifies the code.

- Remove redundant config HAVE_FTRACE_MCOUNT_RECORD

The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the
DYNAMIC_FTRACE work, but now every architecture that implements
DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it
redundant with the HAVE_DYNAMIC_FTRACE.

- Make pid_ptr string size match the comment

In print_graph_proc() the pid_ptr string is of size 11, but the
comment says /* sign + log10(MAX_INT) + '\0' */ which is actually 12.

* tag 'ftrace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD
ftrace: Make DYNAMIC_FTRACE always enabled for architectures that support it
fgraph: Keep track of when fgraph_ops are registered or not
fgraph: Make pid_str size match the comment

show more ...

tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD

Ftrace is tightly coupled with architecture specific code because it
requires the use of trampolines written in assembly. This means that w

tracing: Remove redundant config HAVE_FTRACE_MCOUNT_RECORD

Ftrace is tightly coupled with architecture specific code because it
requires the use of trampolines written in assembly. This means that when
a new feature or optimization is made, it must be done for all
architectures. To simplify the approach, CONFIG_HAVE_FTRACE_* configs are
added to denote which architecture has the new enhancement so that other
architectures can still function until they too have been updated.

The CONFIG_HAVE_FTRACE_MCOUNT was added to help simplify the
DYNAMIC_FTRACE work, but now every architecture that implements
DYNAMIC_FTRACE also has HAVE_FTRACE_MCOUNT set too, making it redundant
with the HAVE_DYNAMIC_FTRACE.

Remove the HAVE_FTRACE_MCOUNT config and use DYNAMIC_FTRACE directly where
applicable.

Link: https://lore.kernel.org/all/20250703154916.48e3ada7@gandalf.local.home/

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/20250704104838.27a18690@gandalf.local.home
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

show more ...

mips/malta,loongson2ef: use generic mc146818_get_time function

mc146818_get_cmos_time() is now mostly equivalent to mc146818_get_time()
from drivers/rtc/rtc-mc146818-lib.c, with the latter using a m

mips/malta,loongson2ef: use generic mc146818_get_time function

mc146818_get_cmos_time() is now mostly equivalent to mc146818_get_time()
from drivers/rtc/rtc-mc146818-lib.c, with the latter using a more
advanced algorithm (which checks the UIP bit in the CMOS). The Malta
and Loongson2ef platforms, the only users of mc146818_get_cmos_time()
have RTC devices that should be MC146818 compatible.

So, rewrite mc146818_get_cmos_time() in a way that uses
mc146818_get_time() and add CONFIG_RTC_MC146818_LIB as a dependency of
CONFIG_MIPS_MALTA and CONFIG_CPU_LOONGSON2EF.

The should be safe as:

- malta_defconfig already uses a standard RTC CMOS driver
(CONFIG_RTC_DRV_CMOS=y). The Malta board has an Intel 82371EB (PIIX4E)
south bridge with the CMOS RTC, so should work correctly with the
modification,

- Loongson2e and 2f apparently use the VIA686B south bridge and the AMD
CS5536 south bridge respectively (at least according to Kconfig). I
have checked datasheets of both and these appear to be MC146818
software compatible.

Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

show more ...

lib/crc: mips: Migrate optimized CRC code into lib/crc/

Move the mips-optimized CRC code from arch/mips/lib/crc* into its new
location in lib/crc/mips/, and wire it up in the new way. This new way

lib/crc: mips: Migrate optimized CRC code into lib/crc/

Move the mips-optimized CRC code from arch/mips/lib/crc* into its new
location in lib/crc/mips/, and wire it up in the new way. This new way
of organizing the CRC code eliminates the need to artificially split the
code for each CRC variant into separate arch and generic modules,
enabling better inlining and dead code elimination. For more details,
see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/".

Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20250607200454.73587-7-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

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mips: econet: Fix incorrect Kconfig dependencies

config ECONET selects SERIAL_OF_PLATFORM and that depends on SERIAL_8250
so we need to select SERIAL_8250 directly.
Also do not enable DEBUG_ZBOOT un

mips: econet: Fix incorrect Kconfig dependencies

config ECONET selects SERIAL_OF_PLATFORM and that depends on SERIAL_8250
so we need to select SERIAL_8250 directly.
Also do not enable DEBUG_ZBOOT unless DEBUG_KERNEL is set.

Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202505211654.CBdIsoTq-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202505211451.WRjyf3a9-lkp@intel.com/
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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mips: Add EcoNet MIPS platform support

Add platform support for EcoNet MIPS SoCs.

Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: SMP: Implement parallel CPU bring up for EyeQ

Added support for starting CPUs in parallel on EyeQ to speed up boot time.

On EyeQ5, booting 8 CPUs is now ~90ms faster.
On EyeQ6, booting 32 CPU

MIPS: SMP: Implement parallel CPU bring up for EyeQ

Added support for starting CPUs in parallel on EyeQ to speed up boot time.

On EyeQ5, booting 8 CPUs is now ~90ms faster.
On EyeQ6, booting 32 CPUs is now ~650ms faster.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

- Improve performance in gendwarfksyms

- Remove depreca

Merge tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

- Improve performance in gendwarfksyms

- Remove deprecated EXTRA_*FLAGS and KBUILD_ENABLE_EXTRA_GCC_CHECKS

- Support CONFIG_HEADERS_INSTALL for ARCH=um

- Use more relative paths to sources files for better reproducibility

- Support the loong64 Debian architecture

- Add Kbuild bash completion

- Introduce intermediate vmlinux.unstripped for architectures that need
static relocations to be stripped from the final vmlinux

- Fix versioning in Debian packages for -rc releases

- Treat missing MODULE_DESCRIPTION() as an error

- Convert Nios2 Makefiles to use the generic rule for built-in DTB

- Add debuginfo support to the RPM package

* tag 'kbuild-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits)
kbuild: rpm-pkg: build a debuginfo RPM
kconfig: merge_config: use an empty file as initfile
nios2: migrate to the generic rule for built-in DTB
rust: kbuild: skip `--remap-path-prefix` for `rustdoc`
kbuild: pacman-pkg: hardcode module installation path
kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally
modpost: require a MODULE_DESCRIPTION()
kbuild: make all file references relative to source root
x86: drop unnecessary prefix map configuration
kbuild: deb-pkg: add comment about future removal of KDEB_COMPRESS
kbuild: Add a help message for "headers"
kbuild: deb-pkg: remove "version" variable in mkdebian
kbuild: deb-pkg: fix versioning for -rc releases
Documentation/kbuild: Fix indentation in modules.rst example
x86: Get rid of Makefile.postlink
kbuild: Create intermediate vmlinux build with relocations preserved
kbuild: Introduce Kconfig symbol for linking vmlinux with relocations
kbuild: link-vmlinux.sh: Make output file name configurable
kbuild: do not generate .tmp_vmlinux*.map when CONFIG_VMLINUX_MAP=y
Revert "kheaders: Ignore silly-rename files"
...

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Merge tag 'asm-generic-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
"This is mainly set of cleanups of asm-generic/io.h, re

Merge tag 'asm-generic-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
"This is mainly set of cleanups of asm-generic/io.h, resolving problems
with inconsistent semantics of ioread64/iowrite64 that were causing
runtime and build issues.

The "GENERIC_IOMAP" version that switches between inb()/outb() and
readb()/writeb() style accessors is now only used on architectures
that have PC-style ISA devices that are not memory mapped (x86, uml,
m68k-q40 and powerpc-powernv), while alpha and parisc use a more
complicated variant and everything else just maps the ioread
interfaces to plan MMIO (readb/writeb etc).

In addition there are two small changes from Raag Jadav to simplify
the asm-generic/io.h indirect inclusions and from Jann Horn to fix a
corner case with read_word_at_a_time"

* tag 'asm-generic-6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
rwonce: fix crash by removing READ_ONCE() for unaligned read
rwonce: handle KCSAN like KASAN in read_word_at_a_time()
m68k: coldfire: select PCI_IOMAP for PCI
mips: export pci_iounmap()
mips: fix PCI_IOBASE definition
m68k/nommu: stop using GENERIC_IOMAP
mips: drop GENERIC_IOMAP wrapper
powerpc: asm/io.h: remove split ioread64/iowrite64 helpers
parisc: stop using asm-generic/iomap.h
sh: remove duplicate ioread/iowrite helpers
alpha: stop using asm-generic/iomap.h
io.h: drop unused headers
drm/draw: include missing headers
asm-generic/io.h: rework split ioread64/iowrite64 helpers

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kbuild: Introduce Kconfig symbol for linking vmlinux with relocations

Some architectures build vmlinux with static relocations preserved, but
strip them again from the final vmlinux image. Arch spec

kbuild: Introduce Kconfig symbol for linking vmlinux with relocations

Some architectures build vmlinux with static relocations preserved, but
strip them again from the final vmlinux image. Arch specific tools
consume these static relocations in order to construct relocation tables
for KASLR.

The fact that vmlinux is created, consumed and subsequently updated goes
against the typical, declarative paradigm used by Make, which is based
on rules and dependencies. So as a first step towards cleaning this up,
introduce a Kconfig symbol to declare that the arch wants to consume the
static relocations emitted into vmlinux. This will be wired up further
in subsequent patches.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

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mips: drop GENERIC_IOMAP wrapper

All PIO on MIPS platforms is memory mapped, so there is no benefit in
the lib/iomap.c wrappers that switch between inb/outb and readb/writeb
style accessses.

In fac

mips: drop GENERIC_IOMAP wrapper

All PIO on MIPS platforms is memory mapped, so there is no benefit in
the lib/iomap.c wrappers that switch between inb/outb and readb/writeb
style accessses.

In fact, the '#define PIO_RESERVED 0' setting completely disables
the GENERIC_IOMAP functionality, and the '#define PIO_OFFSET
mips_io_port_base' setting is based on a misunderstanding of what the
offset is meant to do.

MIPS started using GENERIC_IOMAP in 2018 with commit b962aeb02205 ("MIPS:
Use GENERIC_IOMAP") replacing a simple custom implementation of the same
interfaces, but at the time the asm-generic/io.h version was not usable
yet. Since the header is now always included, it's now possible to go
back to the even simpler version.

Use the normal GENERIC_PCI_IOMAP functionality for all mips platforms
without the hacky GENERIC_IOMAP, and provide a custom pci_iounmap()
for the CONFIG_PCI_DRIVERS_LEGACY case to ensure the I/O port base never
gets unmapped.

The readsl() prototype needs an extra 'const' keyword to make it
compatible with the generic ioread32_rep() alias.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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MIPS: vdso: Switch to generic storage implementation

The generic storage implementation provides the same features as the
custom one. However it can be shared between architectures, making
maintenan

MIPS: vdso: Switch to generic storage implementation

The generic storage implementation provides the same features as the
custom one. However it can be shared between architectures, making
maintenance easier.

Co-developed-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-13-13a4669dfc8c@linutronix.de

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Merge tag 'mips_6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:
"Cleanups and fixes"

* tag 'mips_6.14' of git://git.kernel.org/pub/scm

Merge tag 'mips_6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:
"Cleanups and fixes"

* tag 'mips_6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: pci-legacy: Override pci_address_to_pio
MIPS: Loongson64: env: Use str_on_off() helper in prom_lefi_init_env()
MIPS: migrate to generic rule for built-in DTBs
mips: fix shmctl/semctl/msgctl syscall for o32
mips/math-emu: fix emulation of the prefx instruction
MIPS: Loongson: Add comments for interface_info
MIPS: Loongson64: remove ROM Size unit in boardinfo
MIPS: traps: Use str_enabled_disabled() in parity_protection_init()
MIPS: ftrace: Declare ftrace_get_parent_ra_addr() as static
Revert "MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT"
MIPS: Fix the wrong format specifier
MIPS: Add a blank line after __HEAD
MIPS: kernel: Rename read/write_c0_ecc to read/writec0_errctl

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MIPS: migrate to generic rule for built-in DTBs

Commit 654102df2ac2 ("kbuild: add generic support for built-in boot
DTBs") introduced generic support for built-in DTBs.

Select GENERIC_BUILTIN_DTB a

MIPS: migrate to generic rule for built-in DTBs

Commit 654102df2ac2 ("kbuild: add generic support for built-in boot
DTBs") introduced generic support for built-in DTBs.

Select GENERIC_BUILTIN_DTB and BUILTIN_DTB_ALL when the built-in DTB
support is enabled.

DTBs compiled under arch/mips/boot/dts/ will be wrapped by the generic
rule in scripts/Makefile.vmlinux.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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Revert "MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT"

This reverts commit 426fa8e4fe7bb914b5977cbce453a9926bf5b2e6.

The commit has caused two issues on Loongson 3A4000:

1. The

Revert "MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT"

This reverts commit 426fa8e4fe7bb914b5977cbce453a9926bf5b2e6.

The commit has caused two issues on Loongson 3A4000:

1. The timestamp in dmesg become erratic, like:

[3.736957] amdgpu 0000:04:00.0: ... ...
[3.748895] [drm] Initialized amdgpu ... ...
[18446744073.381141] amdgpu 0000:04:00:0: ... ...
[1.613326] igb 0000:03:00.0 enp3s0: ... ...

2. More seriously, some workloads (for example, the test
stdlib/test-cxa_atexit2 in the Glibc test suite) triggers an RCU
stall and hang the system with a high probably (4 hangs out of 5
tests).

Revert this commit to use jiffie on Loongson MIPS systems and fix these
issues for now. The root cause may need more investigation.

Cc: stable@vger.kernel.org # 6.11+
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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