kernel/git/next/linux-next.git/arch/arc, branch master

Merge branch 'headers' of git://git.infradead.org/users/willy/pagecache.git

2026-09-09T13:22:05+00:00

# Conflicts: # net/ceph/osd_client.c

Merge branch 'mm-nonmm-unstable' of https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-09-09T11:39:28+00:00

Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/mm/linux.git

2026-09-09T11:39:26+00:00

arc: kernel: Fix clk reference leak in show_cpuinfo()

2026-09-09T09:01:11+00:00

In show_cpuinfo(), clk_get() acquires a reference to the CPU clock, but clk_put() is never called to release it. Since show_cpuinfo() is the seq_file show callback for /proc/cpuinfo, this causes a clock reference count leak every time /proc/cpuinfo is read. The frequency is extracted via clk_get_rate() into a local variable, so the clock reference can be safely released immediately after. Fix this by calling clk_put(cpu_clk) right after clk_get_rate(). Fixes: 98f2892607c5 ("ARC: [cpuinfo] Add clk info in /proc/cpuinfo") Signed-off-by: blaze <1466528493@qq.com> Signed-off-by: Vineet Gupta

arc: remove unused profile.h includes

2026-09-09T08:58:23+00:00

None of the code in these files uses declarations provided by profile.h. Remove the unnecessary header includes across the various files to clean up dependencies and reduce include bloat. Signed-off-by: Anthony Iliopoulos Signed-off-by: Vineet Gupta

ARC: cleanup dead ARC_CANT_LLSC option in Kconfig

2026-09-09T08:58:23+00:00

Currently, the ARC_CANT_LLSC config option can never be enabled. It is also not referenced anywhere else. So let's remove this dead code. Note that I have only compile-tested these changes, because I do not have the hardware to runtime test. This dead code was found by kconfirm, a static analysis tool for Kconfig. Signed-off-by: Julian Braha Signed-off-by: Vineet Gupta

init, arch: make CONFIG_COMMAND_LINE_SIZE globally configurable

2026-09-09T06:32:08+00:00

Currently, s390 has the ability to configure the maximum kernel command line size via Kconfig (CONFIG_COMMAND_LINE_SIZE). Other architectures define a hardcoded COMMAND_LINE_SIZE macro in their setup.h headers. In some use cases, such as netboot kernels, rootfs configurations, or larger initramfs setups, a larger command line size is required. While for embedded workloads, it can be reduced to save memory. Move CONFIG_COMMAND_LINE_SIZE out of arch/s390/Kconfig and into init/Kconfig under General setup, and update every architecture's setup.h header to define COMMAND_LINE_SIZE as CONFIG_COMMAND_LINE_SIZE. For user-space API (uapi) headers, wrap the definition in an `#ifdef __KERNEL__` guard and retain the historical hardcoded default in the `#else` block. When user-space headers are installed via `make headers_install`, unifdef strips out the kernel section, ensuring the same value as before for user-space applications including ``. For S390, the range is kept the same, but other architectures have varying constraints. S390 requires a minimum of 896 bytes to protect legacy bootloaders from overwriting the .text section. ARM, M68K, and NIOS2 allocate the command line directly on severely constrained decompressor stacks, so their ranges are strictly capped at 2048 bytes to prevent deterministic stack exhaustion and boot panics. PowerPC (PPC) boot wrappers silently truncate arguments past 2048 bytes, so it is also capped at 2048 to prevent silent parameter loss. The SuperH (SUPERH) boot parameter page allocates exactly PAGE_SIZE (typically 4096 bytes), and placing a 4096-byte command line starting at offset 256 would cause strscpy() to read out of bounds; it is capped at 3840 bytes. Alpha physically limits its boot parameter block to 256 bytes, so its limit is strictly locked to 256. All other architectures are capped at 4096 bytes to prevent unreasonable allocations. Link: https://lore.kernel.org/20260818231646.804507-2-wfelipe@google.com Signed-off-by: Maciej Żenczykowski Signed-off-by: Wilson Felipe Pereira Cc: Albert Ou Cc: Alexander Gordeev Cc: Alexandre Ghiti Cc: Arnd Bergmann Cc: Christian Borntraeger Cc: Heiko Carstens Cc: Palmer Dabbelt Cc: Sven Schnelle Cc: Vasily Gorbik Signed-off-by: Andrew Morton

mm: drop pxd_ERROR()

2026-09-09T06:30:49+00:00

There are no more users left for any pxd_ERROR() either in generic MM or in the platform MM. Hence all these platform macros along with their generic fallback could be dropped across the tree. Link: https://lore.kernel.org/20260831054331.625505-9-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Acked-by: Geert Uytterhoeven # m68k Acked-by: David Hildenbrand (Arm) Acked-by: Mike Rapoport (Microsoft) Cc: Helge Deller Cc: Huacai Chen Cc: James Bottomley Cc: John Paul Adrian Glaubitz Cc: Lorenzo Stoakes Cc: Rich Felker Cc: Samuel Holland Cc: WANG Xuerui Cc: Yoshinori Sato Signed-off-by: Andrew Morton

arch: Remove pagemap.h from arch includes

2026-08-25T19:12:26+00:00

There's no reason to include pagemap.h in any arch include file; these should all be too low-level to include pagemap.h. Some git archaelogy indicates that at one point, swap.h needed declarations from pagemap.h but couldn't include pagemap.h itself. That reason seems to have disappeared since swap.h now includes pagemap.h. Some of these files turn into just including the asm-generic version, so in those cases, modify Kbuild to just use the asm-generic version directly. Signed-off-by: Matthew Wilcox (Oracle)

arc: Fix pgd_t dependency

2026-08-23T20:45:04+00:00

asm-generic/pgtable-nop4d.h uses pgd_t so we need to include first. Presumably this is usually covered up by other includes of asm/page.h first, but a lone inclusion of linux/pgtable.h will hit this dependency problem. Signed-off-by: Matthew Wilcox (Oracle)