kernel/linux.git/arch/sparc/include/asm, branch v6.12.80

sparc64: fix prototypes of reads[bwl]()

2025-11-13T20:34:28+00:00

[ Upstream commit 7205ef77dfe167df1b83aea28cf00fc02d662990 ] Conventions for readsl() are the same as for readl() - any __iomem pointer is acceptable, both const and volatile ones being OK. Same for readsb() and readsw(). Signed-off-by: Al Viro Reviewed-by: Andreas Larsson Signed-off-by: Andreas Larsson # Making sparc64 subject prefix Signed-off-by: Sasha Levin

sparc/module: Add R_SPARC_UA64 relocation handling

2025-11-13T20:34:28+00:00

[ Upstream commit 05457d96175d25c976ab6241c332ae2eb5e07833 ] This is needed so that the kernel can handle R_SPARC_UA64 relocations, which is emitted by LLVM's IAS. Signed-off-by: Koakuma Reviewed-by: Andreas Larsson Signed-off-by: Andreas Larsson Signed-off-by: Sasha Levin

Fix access to video_is_primary_device() when compiled without CONFIG_VIDEO

2025-11-13T20:34:22+00:00

[ Upstream commit 6e490dea61b88aac9762c9f79a54aad4ea2e6cd1 ] When compiled without CONFIG_VIDEO the architecture specific implementations of video_is_primary_device() include prototypes and assume that video-common.c will be linked. Guard against this so that the fallback inline implementation that returns false will be used when compiled without CONFIG_VIDEO. Acked-by: Thomas Zimmermann Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202506221312.49Fy1aNA-lkp@intel.com/ Link: https://lore.kernel.org/r/20250811162606.587759-2-superm1@kernel.org Signed-off-by: Mario Limonciello (AMD) Signed-off-by: Sasha Levin

sparc/mm: avoid calling arch_enter/leave_lazy_mmu() in set_ptes

2025-04-20T08:15:48+00:00

commit eb61ad14c459b54f71f76331ca35d12fa3eb8f98 upstream. With commit 1a10a44dfc1d ("sparc64: implement the new page table range API") set_ptes was added to the sparc architecture. The implementation included calling arch_enter/leave_lazy_mmu() calls. The patch removes the usage of arch_enter/leave_lazy_mmu() since this implies nesting of lazy mmu regions which is not supported. Without this fix, lazy mmu mode is effectively disabled because we exit the mode after the first set_ptes: remap_pte_range() -> arch_enter_lazy_mmu() -> set_ptes() -> arch_enter_lazy_mmu() -> arch_leave_lazy_mmu() -> arch_leave_lazy_mmu() Powerpc suffered the same problem and fixed it in a corresponding way with commit 47b8def9358c ("powerpc/mm: Avoid calling arch_enter/leave_lazy_mmu() in set_ptes"). Link: https://lkml.kernel.org/r/20250303141542.3371656-5-ryan.roberts@arm.com Fixes: 1a10a44dfc1d ("sparc64: implement the new page table range API") Signed-off-by: Ryan Roberts Acked-by: David Hildenbrand Acked-by: Andreas Larsson Acked-by: Juergen Gross Cc: Borislav Betkov Cc: Boris Ostrovsky Cc: Catalin Marinas Cc: Dave Hansen Cc: David S. Miller Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Juegren Gross Cc: Matthew Wilcow (Oracle) Cc: Thomas Gleinxer Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

mm: hugetlb: Add huge page size param to huge_ptep_get_and_clear()

2025-03-13T12:02:17+00:00

commit 02410ac72ac3707936c07ede66e94360d0d65319 upstream. In order to fix a bug, arm64 needs to be told the size of the huge page for which the huge_pte is being cleared in huge_ptep_get_and_clear(). Provide for this by adding an `unsigned long sz` parameter to the function. This follows the same pattern as huge_pte_clear() and set_huge_pte_at(). This commit makes the required interface modifications to the core mm as well as all arches that implement this function (arm64, loongarch, mips, parisc, powerpc, riscv, s390, sparc). The actual arm64 bug will be fixed in a separate commit. Cc: stable@vger.kernel.org Fixes: 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") Acked-by: David Hildenbrand Reviewed-by: Alexandre Ghiti # riscv Reviewed-by: Christophe Leroy Reviewed-by: Catalin Marinas Reviewed-by: Anshuman Khandual Signed-off-by: Ryan Roberts Acked-by: Alexander Gordeev # s390 Link: https://lore.kernel.org/r/20250226120656.2400136-2-ryan.roberts@arm.com Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman

mm: always define pxx_pgprot()

2024-09-17T08:06:59+00:00

There're: - 8 archs (arc, arm64, include, mips, powerpc, s390, sh, x86) that support pte_pgprot(). - 2 archs (x86, sparc) that support pmd_pgprot(). - 1 arch (x86) that support pud_pgprot(). Always define them to be used in generic code, and then we don't need to fiddle with "#ifdef"s when doing so. Link: https://lkml.kernel.org/r/20240826204353.2228736-9-peterx@redhat.com Signed-off-by: Peter Xu Reviewed-by: Jason Gunthorpe Cc: Alexander Gordeev Cc: Alex Williamson Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Dave Hansen Cc: David Hildenbrand Cc: Gavin Shan Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Ingo Molnar Cc: Matthew Wilcox Cc: Niklas Schnelle Cc: Paolo Bonzini Cc: Ryan Roberts Cc: Sean Christopherson Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Cc: Zi Yan Signed-off-by: Andrew Morton

arch, mm: move definition of node_data to generic code

2024-09-04T04:15:28+00:00

Every architecture that supports NUMA defines node_data in the same way: struct pglist_data *node_data[MAX_NUMNODES]; No reason to keep multiple copies of this definition and its forward declarations, especially when such forward declaration is the only thing in include/asm/mmzone.h for many architectures. Add definition and declaration of node_data to generic code and drop architecture-specific versions. Link: https://lkml.kernel.org/r/20240807064110.1003856-8-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) Acked-by: David Hildenbrand Reviewed-by: Jonathan Cameron Acked-by: Davidlohr Bueso Tested-by: Zi Yan # for x86_64 and arm64 Tested-by: Jonathan Cameron [arm64 + CXL via QEMU] Acked-by: Dan Williams Cc: Alexander Gordeev Cc: Andreas Larsson Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: David S. Miller Cc: Greg Kroah-Hartman Cc: Heiko Carstens Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiaxun Yang Cc: John Paul Adrian Glaubitz Cc: Jonathan Corbet Cc: Michael Ellerman Cc: Palmer Dabbelt Cc: Rafael J. Wysocki Cc: Rob Herring (Arm) Cc: Samuel Holland Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton

Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2024-07-25T17:42:22+00:00

Pull driver core updates from Greg KH: "Here is the big set of driver core changes for 6.11-rc1. Lots of stuff in here, with not a huge diffstat, but apis are evolving which required lots of files to be touched. Highlights of the changes in here are: - platform remove callback api final fixups (Uwe took many releases to get here, finally!) - Rust bindings for basic firmware apis and initial driver-core interactions. It's not all that useful for a "write a whole driver in rust" type of thing, but the firmware bindings do help out the phy rust drivers, and the driver core bindings give a solid base on which others can start their work. There is still a long way to go here before we have a multitude of rust drivers being added, but it's a great first step. - driver core const api changes. This reached across all bus types, and there are some fix-ups for some not-common bus types that linux-next and 0-day testing shook out. This work is being done to help make the rust bindings more safe, as well as the C code, moving toward the end-goal of allowing us to put driver structures into read-only memory. We aren't there yet, but are getting closer. - minor devres cleanups and fixes found by code inspection - arch_topology minor changes - other minor driver core cleanups All of these have been in linux-next for a very long time with no reported problems" * tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits) ARM: sa1100: make match function take a const pointer sysfs/cpu: Make crash_hotplug attribute world-readable dio: Have dio_bus_match() callback take a const * zorro: make match function take a const pointer driver core: module: make module_[add|remove]_driver take a const * driver core: make driver_find_device() take a const * driver core: make driver_[create|remove]_file take a const * firmware_loader: fix soundness issue in `request_internal` firmware_loader: annotate doctests as `no_run` devres: Correct code style for functions that return a pointer type devres: Initialize an uninitialized struct member devres: Fix memory leakage caused by driver API devm_free_percpu() devres: Fix devm_krealloc() wasting memory driver core: platform: Switch to use kmemdup_array() driver core: have match() callback in struct bus_type take a const * MAINTAINERS: add Rust device abstractions to DRIVER CORE device: rust: improve safety comments MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER firmware: rust: improve safety comments ...

Merge tag 'sparc-for-6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc

2024-07-18T22:48:41+00:00

Pull sparc updates from Andreas Larsson: - Add MODULE_DESCRIPTION for a number of sbus drivers - Fix linking error for large sparc32 kernels - Fix incorrect functions signature and prototype warnings for sparc64 * tag 'sparc-for-6.11-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc: sparc64: Fix prototype warnings in hibernate.c sparc64: Fix prototype warning for prom_get_mmu_ihandle sparc64: Fix incorrect function signature and add prototype for prom_cif_init sparc64: Fix prototype warnings for floppy_64.h sparc32: Fix truncated relocation errors when linking large kernels sbus: add missing MODULE_DESCRIPTION() macros

sparc64: Fix incorrect function signature and add prototype for prom_cif_init

2024-07-11T13:58:28+00:00

Remove the unused cif_stack argument and add a protype in oplib_64.h Commit ef3e035c3a9b ("sparc64: Fix register corruption in top-most kernel stack frame during boot.") removed the cif_stack argument to prom_cif init in the declaration at the caller site and the usage of it within prom_cif_init, but not in the function signature of the function itself. This also fixes the following warning: arch/sparc/prom/p1275.c:52:6: warning: no previous prototype for ‘prom_cif_init’ Fixes: ef3e035c3a9b ("sparc64: Fix register corruption in top-most kernel stack frame during boot.") Link: https://lore.kernel.org/r/20240710094155.458731-3-andreas@gaisler.com Signed-off-by: Andreas Larsson