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Revision tags: v6.19-rc2 |
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24f171c7 |
| 21-Dec-2025 |
Takashi Iwai <tiwai@suse.de> |
Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.19
We've been quite busy with fixes since the merge window, though
Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.19
We've been quite busy with fixes since the merge window, though not in any particularly exciting ways - the standout thing is the fix for _SX controls which were broken by a change to how we do clamping, otherwise it's all fairly run of the mill fixes and quirks.
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| #
84318277 |
| 15-Dec-2025 |
Maarten Lankhorst <dev@lankhorst.se> |
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
Pull in rc1 to include all changes since the merge window closed, and grab all fixes and changes from drm/drm-next.
Signed-off-by: M
Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes
Pull in rc1 to include all changes since the merge window closed, and grab all fixes and changes from drm/drm-next.
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
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Revision tags: v6.19-rc1 |
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399ead3a |
| 06-Dec-2025 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull UML updates from Johannes Berg: "Apart from the usual small churn, we have
- initial SMP suppo
Merge tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull UML updates from Johannes Berg: "Apart from the usual small churn, we have
- initial SMP support (only kernel)
- major vDSO cleanups (and fixes for 32-bit)"
* tag 'uml-for-linux-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (33 commits) um: Disable KASAN_INLINE when STATIC_LINK is selected um: Don't rename vmap to kernel_vmap um: drivers: virtio: use string choices helper um: Always set up AT_HWCAP and AT_PLATFORM x86/um: Remove FIXADDR_USER_START and FIXADDR_USE_END um: Remove __access_ok_vsyscall() um: Remove redundant range check from __access_ok_vsyscall() um: Remove fixaddr_user_init() x86/um: Drop gate area handling x86/um: Do not inherit vDSO from host um: Split out default elf_aux_hwcap x86/um: Move ELF_PLATFORM fallback to x86-specific code um: Split out default elf_aux_platform um: Avoid circular dependency on asm-offsets in pgtable.h um: Enable SMP support on x86 asm-generic: percpu: Add assembly guard um: vdso: Remove getcpu support on x86 um: Add initial SMP support um: Define timers on a per-CPU basis um: Determine sleep based on need_resched() ...
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Revision tags: v6.18 |
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| #
a3209bb9 |
| 29-Nov-2025 |
Christophe Leroy (CS GROUP) <chleroy@kernel.org> |
um: Disable KASAN_INLINE when STATIC_LINK is selected
um doesn't support KASAN_INLINE together with STATIC_LINK.
Instead of failing the build, disable KASAN_INLINE when STATIC_LINK is selected.
Re
um: Disable KASAN_INLINE when STATIC_LINK is selected
um doesn't support KASAN_INLINE together with STATIC_LINK.
Instead of failing the build, disable KASAN_INLINE when STATIC_LINK is selected.
Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202511290451.x9GZVJ1l-lkp@intel.com/ Fixes: 1e338f4d99e6 ("kasan: introduce ARCH_DEFER_KASAN and unify static key across modes") Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org> Link: https://patch.msgid.link/2620ab0bbba640b6237c50b9c0dca1c7d1142f5d.1764410067.git.chleroy@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Revision tags: v6.18-rc7, v6.18-rc6, v6.18-rc5, v6.18-rc4 |
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| #
1e4ee513 |
| 27-Oct-2025 |
Tiwei Bie <tiwei.btw@antgroup.com> |
um: Add initial SMP support
Add initial symmetric multi-processing (SMP) support to UML. With this support enabled, users can tell UML to start multiple virtual processors, each represented as a sep
um: Add initial SMP support
Add initial symmetric multi-processing (SMP) support to UML. With this support enabled, users can tell UML to start multiple virtual processors, each represented as a separate host thread.
In UML, kthreads and normal threads (when running in kernel mode) can be scheduled and executed simultaneously on different virtual processors. However, the userspace code of normal threads still runs within their respective single-threaded stubs.
That is, SMP support is currently available both within the kernel and across different processes, but still remains limited within threads of the same process in userspace.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20251027001815.1666872-6-tiwei.bie@linux.dev Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| #
a7f7dbae |
| 27-Oct-2025 |
Tiwei Bie <tiwei.btw@antgroup.com> |
um: Remove file-based iomem emulation support
The file-based iomem emulation was introduced to support writing paravirtualized drivers based on emulated iomem regions. However, the only driver that
um: Remove file-based iomem emulation support
The file-based iomem emulation was introduced to support writing paravirtualized drivers based on emulated iomem regions. However, the only driver that makes use of it is an example driver called mmapper, which was written over two decades ago.
We now have several modern device emulation mechanisms, such as vhost-user-based virtio-uml. Remove the file-based iomem emulation support to reduce the maintenance burden.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20251027054519.1996090-5-tiwei.bie@linux.dev Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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7362b5b4 |
| 02-Dec-2025 |
Jiri Kosina <jkosina@suse.com> |
Merge branch 'for-6.19/nintendo' into for-linus
- switch to WQ_PERCPU workaueues (Marco Crivellari) - reduce potential initialization blocking time of hid-nintendo (Willy Huang)
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cb9f145f |
| 01-Nov-2025 |
Rob Clark <robin.clark@oss.qualcomm.com> |
Merge remote-tracking branch 'drm/drm-next' into msm-next-robclark
Back-merge drm-next to get caught up.
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
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Revision tags: v6.18-rc3, v6.18-rc2 |
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82ee5025 |
| 14-Oct-2025 |
Thomas Hellström <thomas.hellstrom@linux.intel.com> |
Merge drm/drm-next into drm-xe-next
Backmerging to bring in 6.18-rc1.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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2acee98f |
| 14-Oct-2025 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to v6.18-rc1.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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9b966ae4 |
| 13-Oct-2025 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-next into drm-misc-next
Updating drm-misc-next to the state of v6.18-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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Revision tags: v6.18-rc1 |
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| #
39e9d5f6 |
| 12-Oct-2025 |
Alexei Starovoitov <ast@kernel.org> |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf before 6.18-rc1
Cross-merge BPF and other fixes after downstream PR.
No conflicts.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Revision tags: v6.17, v6.17-rc7 |
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f088104d |
| 16-Sep-2025 |
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> |
Merge drm/drm-next into drm-intel-gt-next
Backmerge in order to get the commit:
048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")
To drm-intel-gt-next as there are f
Merge drm/drm-next into drm-intel-gt-next
Backmerge in order to get the commit:
048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")
To drm-intel-gt-next as there are followup fixes to be applied.
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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2ace5271 |
| 21-Nov-2025 |
Peter Zijlstra <peterz@infradead.org> |
Merge branch 'objtool/core'
Bring in the UDB and objtool data annotations to avoid conflicts while further extending the bug exceptions.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
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Revision tags: v6.17-rc6, v6.17-rc5, v6.17-rc4, v6.17-rc3, v6.17-rc2, v6.17-rc1 |
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a53d0cf7 |
| 05-Aug-2025 |
Ingo Molnar <mingo@kernel.org> |
Merge commit 'linus' into core/bugs, to resolve conflicts
Resolve conflicts with this commit that was developed in parallel during the merge window:
8c8efa93db68 ("x86/bug: Add ARCH_WARN_ASM macro
Merge commit 'linus' into core/bugs, to resolve conflicts
Resolve conflicts with this commit that was developed in parallel during the merge window:
8c8efa93db68 ("x86/bug: Add ARCH_WARN_ASM macro for BUG/WARN asm code sharing with Rust")
Conflicts: arch/riscv/include/asm/bug.h arch/x86/include/asm/bug.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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f39b6c46 |
| 18-Nov-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.18-rc6' into for-linus
Sync up with the mainline to bring in definition of INPUT_PROP_HAPTIC_TOUCHPAD.
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4f38da1f |
| 13-Oct-2025 |
Mark Brown <broonie@kernel.org> |
spi: Merge up v6.18-rc1
Ensure my CI has a sensible baseline.
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| #
ec2e0fb0 |
| 16-Oct-2025 |
Takashi Iwai <tiwai@suse.de> |
Merge tag 'asoc-fix-v6.18-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.18
A moderately large collection of driver specific fixes, plus a f
Merge tag 'asoc-fix-v6.18-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.18
A moderately large collection of driver specific fixes, plus a few new quirks and device IDs. The NAU8821 changes are a little large but more in mechanical ways than in ways that are complex.
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| #
48a71076 |
| 14-Oct-2025 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-fixes into drm-misc-fixes
Updating drm-misc-fixes to the state of v6.18-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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8b87f67b |
| 08-Oct-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.18 merge window.
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4b051897 |
| 21-Aug-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.17-rc2' into HEAD
Sync up with mainline to bring in changes to include/linux/sprintf.h
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fc282d17 |
| 06-Oct-2025 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'uml-for-linux-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull uml updates from Johannes Berg:
- minor preparations for SMP support
- SPARSE_IRQ support for k
Merge tag 'uml-for-linux-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux
Pull uml updates from Johannes Berg:
- minor preparations for SMP support
- SPARSE_IRQ support for kunit
- help output cleanups
* tag 'uml-for-linux-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: um: Remove unused ipi_pipe field from cpuinfo_um um: Remove unused cpu_data and current_cpu_data macros um: Stop tracking virtual CPUs via mm_cpumask() um: Centralize stub size calculations um: Remove outdated comment about STUB_DATA_PAGES um: Remove unused offset and child_err fields from stub_data um: Indent time-travel help messages um: Fix help message for ssl-non-raw um: vector: Fix indentation for help message um: Add missing trailing newline to help messages um: virtio-pci: implement .shutdown() um: Support SPARSE_IRQ
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35fae10a |
| 28-Aug-2025 |
Sinan Nalkaya <sardok@gmail.com> |
um: Support SPARSE_IRQ
Motivation: IRQ KUnit tests are going to require CONFIG_SPARSE_IRQ [1] in order to: (a) reliably allocate additional (fake) IRQs and (b) ensure we can test managed affinity, w
um: Support SPARSE_IRQ
Motivation: IRQ KUnit tests are going to require CONFIG_SPARSE_IRQ [1] in order to: (a) reliably allocate additional (fake) IRQs and (b) ensure we can test managed affinity, which is only supported with SPARSE_IRQ.
It seems that the only thing necessary for ARCH=um is to tell the genirq core to skip over our preallocated NR_IRQS.
Tested with:
$ ./tools/testing/kunit/kunit.py run [...] [13:55:58] Testing complete. Ran 676 tests: passed: 646, skipped: 30 [...]
This compares with pre-patch results:
Ran 672 tests: passed: 644, skipped: 28
i.e., we no longer skip tests that 'depend on SPARSE_IRQ', and existing tests all pass.
[1] [PATCH v2 4/6] genirq/test: Depend on SPARSE_IRQ https://lore.kernel.org/all/CABVgOSngoD0fh1WEkUCEwSdk0Joypo3dA_Y_SjW+K=nVDnZs3Q@mail.gmail.com/
Signed-off-by: Sinan Nalkaya <sardok@gmail.com> [Brian: Adapted Sinan's patch; rewrote commit message] Signed-off-by: Brian Norris <briannorris@chromium.org> Tested-by: David Gow <davidgow@google.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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| #
8804d970 |
| 03-Oct-2025 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "mm, swap: improve cluster scan strategy" from Kairui Song imp
Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "mm, swap: improve cluster scan strategy" from Kairui Song improves performance and reduces the failure rate of swap cluster allocation
- "support large align and nid in Rust allocators" from Vitaly Wool permits Rust allocators to set NUMA node and large alignment when perforning slub and vmalloc reallocs
- "mm/damon/vaddr: support stat-purpose DAMOS" from Yueyang Pan extend DAMOS_STAT's handling of the DAMON operations sets for virtual address spaces for ops-level DAMOS filters
- "execute PROCMAP_QUERY ioctl under per-vma lock" from Suren Baghdasaryan reduces mmap_lock contention during reads of /proc/pid/maps
- "mm/mincore: minor clean up for swap cache checking" from Kairui Song performs some cleanup in the swap code
- "mm: vm_normal_page*() improvements" from David Hildenbrand provides code cleanup in the pagemap code
- "add persistent huge zero folio support" from Pankaj Raghav provides a block layer speedup by optionalls making the huge_zero_pagepersistent, instead of releasing it when its refcount falls to zero
- "kho: fixes and cleanups" from Mike Rapoport adds a few touchups to the recently added Kexec Handover feature
- "mm: make mm->flags a bitmap and 64-bit on all arches" from Lorenzo Stoakes turns mm_struct.flags into a bitmap. To end the constant struggle with space shortage on 32-bit conflicting with 64-bit's needs
- "mm/swapfile.c and swap.h cleanup" from Chris Li cleans up some swap code
- "selftests/mm: Fix false positives and skip unsupported tests" from Donet Tom fixes a few things in our selftests code
- "prctl: extend PR_SET_THP_DISABLE to only provide THPs when advised" from David Hildenbrand "allows individual processes to opt-out of THP=always into THP=madvise, without affecting other workloads on the system".
It's a long story - the [1/N] changelog spells out the considerations
- "Add and use memdesc_flags_t" from Matthew Wilcox gets us started on the memdesc project. Please see
https://kernelnewbies.org/MatthewWilcox/Memdescs and https://blogs.oracle.com/linux/post/introducing-memdesc
- "Tiny optimization for large read operations" from Chi Zhiling improves the efficiency of the pagecache read path
- "Better split_huge_page_test result check" from Zi Yan improves our folio splitting selftest code
- "test that rmap behaves as expected" from Wei Yang adds some rmap selftests
- "remove write_cache_pages()" from Christoph Hellwig removes that function and converts its two remaining callers
- "selftests/mm: uffd-stress fixes" from Dev Jain fixes some UFFD selftests issues
- "introduce kernel file mapped folios" from Boris Burkov introduces the concept of "kernel file pages". Using these permits btrfs to account its metadata pages to the root cgroup, rather than to the cgroups of random inappropriate tasks
- "mm/pageblock: improve readability of some pageblock handling" from Wei Yang provides some readability improvements to the page allocator code
- "mm/damon: support ARM32 with LPAE" from SeongJae Park teaches DAMON to understand arm32 highmem
- "tools: testing: Use existing atomic.h for vma/maple tests" from Brendan Jackman performs some code cleanups and deduplication under tools/testing/
- "maple_tree: Fix testing for 32bit compiles" from Liam Howlett fixes a couple of 32-bit issues in tools/testing/radix-tree.c
- "kasan: unify kasan_enabled() and remove arch-specific implementations" from Sabyrzhan Tasbolatov moves KASAN arch-specific initialization code into a common arch-neutral implementation
- "mm: remove zpool" from Johannes Weiner removes zspool - an indirection layer which now only redirects to a single thing (zsmalloc)
- "mm: task_stack: Stack handling cleanups" from Pasha Tatashin makes a couple of cleanups in the fork code
- "mm: remove nth_page()" from David Hildenbrand makes rather a lot of adjustments at various nth_page() callsites, eventually permitting the removal of that undesirable helper function
- "introduce kasan.write_only option in hw-tags" from Yeoreum Yun creates a KASAN read-only mode for ARM, using that architecture's memory tagging feature. It is felt that a read-only mode KASAN is suitable for use in production systems rather than debug-only
- "mm: hugetlb: cleanup hugetlb folio allocation" from Kefeng Wang does some tidying in the hugetlb folio allocation code
- "mm: establish const-correctness for pointer parameters" from Max Kellermann makes quite a number of the MM API functions more accurate about the constness of their arguments. This was getting in the way of subsystems (in this case CEPH) when they attempt to improving their own const/non-const accuracy
- "Cleanup free_pages() misuse" from Vishal Moola fixes a number of code sites which were confused over when to use free_pages() vs __free_pages()
- "Add Rust abstraction for Maple Trees" from Alice Ryhl makes the mapletree code accessible to Rust. Required by nouveau and by its forthcoming successor: the new Rust Nova driver
- "selftests/mm: split_huge_page_test: split_pte_mapped_thp improvements" from David Hildenbrand adds a fix and some cleanups to the thp selftesting code
- "mm, swap: introduce swap table as swap cache (phase I)" from Chris Li and Kairui Song is the first step along the path to implementing "swap tables" - a new approach to swap allocation and state tracking which is expected to yield speed and space improvements. This patchset itself yields a 5-20% performance benefit in some situations
- "Some ptdesc cleanups" from Matthew Wilcox utilizes the new memdesc layer to clean up the ptdesc code a little
- "Fix va_high_addr_switch.sh test failure" from Chunyu Hu fixes some issues in our 5-level pagetable selftesting code
- "Minor fixes for memory allocation profiling" from Suren Baghdasaryan addresses a couple of minor issues in relatively new memory allocation profiling feature
- "Small cleanups" from Matthew Wilcox has a few cleanups in preparation for more memdesc work
- "mm/damon: add addr_unit for DAMON_LRU_SORT and DAMON_RECLAIM" from Quanmin Yan makes some changes to DAMON in furtherance of supporting arm highmem
- "selftests/mm: Add -Wunreachable-code and fix warnings" from Muhammad Anjum adds that compiler check to selftests code and fixes the fallout, by removing dead code
- "Improvements to Victim Process Thawing and OOM Reaper Traversal Order" from zhongjinji makes a number of improvements in the OOM killer: mainly thawing a more appropriate group of victim threads so they can release resources
- "mm/damon: misc fixups and improvements for 6.18" from SeongJae Park is a bunch of small and unrelated fixups for DAMON
- "mm/damon: define and use DAMON initialization check function" from SeongJae Park implement reliability and maintainability improvements to a recently-added bug fix
- "mm/damon/stat: expose auto-tuned intervals and non-idle ages" from SeongJae Park provides additional transparency to userspace clients of the DAMON_STAT information
- "Expand scope of khugepaged anonymous collapse" from Dev Jain removes some constraints on khubepaged's collapsing of anon VMAs. It also increases the success rate of MADV_COLLAPSE against an anon vma
- "mm: do not assume file == vma->vm_file in compat_vma_mmap_prepare()" from Lorenzo Stoakes moves us further towards removal of file_operations.mmap(). This patchset concentrates upon clearing up the treatment of stacked filesystems
- "mm: Improve mlock tracking for large folios" from Kiryl Shutsemau provides some fixes and improvements to mlock's tracking of large folios. /proc/meminfo's "Mlocked" field became more accurate
- "mm/ksm: Fix incorrect accounting of KSM counters during fork" from Donet Tom fixes several user-visible KSM stats inaccuracies across forks and adds selftest code to verify these counters
- "mm_slot: fix the usage of mm_slot_entry" from Wei Yang addresses some potential but presently benign issues in KSM's mm_slot handling
* tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (372 commits) mm: swap: check for stable address space before operating on the VMA mm: convert folio_page() back to a macro mm/khugepaged: use start_addr/addr for improved readability hugetlbfs: skip VMAs without shareable locks in hugetlb_vmdelete_list alloc_tag: fix boot failure due to NULL pointer dereference mm: silence data-race in update_hiwater_rss mm/memory-failure: don't select MEMORY_ISOLATION mm/khugepaged: remove definition of struct khugepaged_mm_slot mm/ksm: get mm_slot by mm_slot_entry() when slot is !NULL hugetlb: increase number of reserving hugepages via cmdline selftests/mm: add fork inheritance test for ksm_merging_pages counter mm/ksm: fix incorrect KSM counter handling in mm_struct during fork drivers/base/node: fix double free in register_one_node() mm: remove PMD alignment constraint in execmem_vmalloc() mm/memory_hotplug: fix typo 'esecially' -> 'especially' mm/rmap: improve mlock tracking for large folios mm/filemap: map entire large folio faultaround mm/fault: try to map the entire file folio in finish_fault() mm/rmap: mlock large folios in try_to_unmap_one() mm/rmap: fix a mlock race condition in folio_referenced_one() ...
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| #
1e338f4d |
| 10-Aug-2025 |
Sabyrzhan Tasbolatov <snovitoll@gmail.com> |
kasan: introduce ARCH_DEFER_KASAN and unify static key across modes
Patch series "kasan: unify kasan_enabled() and remove arch-specific implementations", v6.
This patch series addresses the fragmen
kasan: introduce ARCH_DEFER_KASAN and unify static key across modes
Patch series "kasan: unify kasan_enabled() and remove arch-specific implementations", v6.
This patch series addresses the fragmentation in KASAN initialization across architectures by introducing a unified approach that eliminates duplicate static keys and arch-specific kasan_arch_is_ready() implementations.
The core issue is that different architectures have inconsistent approaches to KASAN readiness tracking: - PowerPC, LoongArch, and UML arch, each implement own kasan_arch_is_ready() - Only HW_TAGS mode had a unified static key (kasan_flag_enabled) - Generic and SW_TAGS modes relied on arch-specific solutions or always-on behavior
This patch (of 2):
Introduce CONFIG_ARCH_DEFER_KASAN to identify architectures [1] that need to defer KASAN initialization until shadow memory is properly set up, and unify the static key infrastructure across all KASAN modes.
[1] PowerPC, UML, LoongArch selects ARCH_DEFER_KASAN.
The core issue is that different architectures haveinconsistent approaches to KASAN readiness tracking: - PowerPC, LoongArch, and UML arch, each implement own kasan_arch_is_ready() - Only HW_TAGS mode had a unified static key (kasan_flag_enabled) - Generic and SW_TAGS modes relied on arch-specific solutions or always-on behavior
This patch addresses the fragmentation in KASAN initialization across architectures by introducing a unified approach that eliminates duplicate static keys and arch-specific kasan_arch_is_ready() implementations.
Let's replace kasan_arch_is_ready() with existing kasan_enabled() check, which examines the static key being enabled if arch selects ARCH_DEFER_KASAN or has HW_TAGS mode support. For other arch, kasan_enabled() checks the enablement during compile time.
Now KASAN users can use a single kasan_enabled() check everywhere.
Link: https://lkml.kernel.org/r/20250810125746.1105476-1-snovitoll@gmail.com Link: https://lkml.kernel.org/r/20250810125746.1105476-2-snovitoll@gmail.com Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217049 Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> #powerpc Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Baoquan He <bhe@redhat.com> Cc: David Gow <davidgow@google.com> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Huacai Chen <chenhuacai@loongson.cn> Cc: Marco Elver <elver@google.com> Cc: Qing Zhang <zhangqing@loongson.cn> Cc: Sabyrzhan Tasbolatov <snovitoll@gmail.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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