kernel/git/next/linux-next.git/drivers/accel, branch master

Merge branch 'for-linux-next-fixes' of https://gitlab.freedesktop.org/drm/misc/kernel.git

2026-08-28T12:34:53+00:00

# Conflicts: # drivers/accel/ethosu/ethosu_drv.c # drivers/gpu/drm/nouveau/nvkm/engine/disp/head.h # drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/disp.c

accel/ethosu: fix job completion fence cleanup

2026-08-27T00:53:40+00:00

ethosu_ioctl_submit_job() allocates done_fence before validating buffer handles. Errors after allocation call ethosu_job_err_cleanup(), which frees the job but leaks the uninitialized fence. A scheduler dependency error also lets ethosu_job_run() return before dma_fence_init(). Normal cleanup then passes a zeroed refcount to dma_fence_put(). Release done_fence in the common cleanup path and use dma_fence_was_initialized() to distinguish initialized fences from raw allocations. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Reported-by: Sashiko Link: https://sashiko.dev/#/patchset/20260716065219.931088-1-zhaoguohan@kylinos.cn?part=1 Signed-off-by: GuoHan Zhao Link: https://patch.msgid.link/20260717061145.1478139-6-zhaoguohan@kylinos.cn [robh: also fix goto] Signed-off-by: Rob Herring (Arm)

accel: ethosu: Don't read the U65 rounding mode as a storage mode

2026-08-24T22:20:58+00:00

Bits 15:14 of NPU_SET_{IFM,OFM}_PRECISION select the activation storage mode on U85 only. On U65 the same field holds the rounding mode, and the command stream parser has read it as a storage mode since the driver was added. That went unnoticed while unknown values fell through the switch, but now that they are rejected, every U65 command stream that asks for natural rounding (2) fails CMDSTREAM_BO_CREATE with -EINVAL. Mesa emits it for average pooling, concatenation, split, unpack, strided slice, LUT and argmax, which is 72 failures of the Teflon test suite on an i.MX93. Truncating rounding (1) is misread as well: it picks the two-tile address path and computes a bogus feature map size from tile bases the command stream never set. Read the field as a storage mode only on the hardware where it is one. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Fixes: 6b7e0066294d ("accel: ethosu: Handle U85 internal chaining buffer") Assisted-by: Claude:claude-opus-5 Signed-off-by: Tomeu Vizoso Link: https://patch.msgid.link/20260824152612.751007-1-tomeu@tomeuvizoso.net Signed-off-by: Rob Herring (Arm)

accel/ethosu: check MMIO mapping errors in probe

2026-08-24T21:49:28+00:00

devm_platform_ioremap_resource() returns an error pointer when the register resource cannot be mapped. ethosu_probe() stores it and continues until initialization dereferences it through MMIO accessors. Return the mapping error before initializing the device. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Signed-off-by: GuoHan Zhao Link: https://patch.msgid.link/20260716065219.931088-1-zhaoguohan@kylinos.cn Signed-off-by: Rob Herring (Arm)

accel/amdxdna: put the chained BO when its mapping fails

2026-08-24T16:29:52+00:00

amdxdna_cmd_set_error() looks up the first BO of a command chain, which takes a reference, and drops it at the end of the function. The mapping of that BO is established in between, and the failure path returns without the put, so the reference is leaked. Ordinary use does not reach it. The chain has been submitted before any of this runs, so aie2_cmdlist_fill_slot() has already called amdxdna_cmd_get_op() on that BO and amdxdna_gem_vmap() has cached its address. What makes it reachable is that the BO is resolved again by handle here, and the handle is userspace's to recycle: closing it after submission and importing a dma-buf whose exporter implements no vmap onto the same id leaves amdxdna_gem_get_obj() returning an object this cannot map, since prime_import() types every import AMDXDNA_BO_SHARE. Fixes: d76856beb4a4 ("accel/amdxdna: Refactor GEM BO handling and add helper APIs for address retrieval") Signed-off-by: Taimuraz Kaitmazov Reviewed-by: Lizhi Hou Signed-off-by: Lizhi Hou Link: https://patch.msgid.link/20260819230852.287751-1-taimuraz@kaitmazov.com

accel/amdxdna: reject a command chain that carries no commands

2026-08-24T16:29:47+00:00

A chain whose command_count is zero passes the payload length check, because struct_size(payload, data, 0) is just the header. The fill loop then does not run, so offset stays zero and the request is submitted with a zero-length buffer. On firmware without AIE2_NPU_COMMAND that ends at the opcode check, since op is still ERT_INVALID_CMD and aie2_get_chain_msg_op() answers MSG_OP_MAX_OPCODE. aie2_get_npu_chain_msg_op() answers MSG_OP_CHAIN_EXEC_NPU whatever it is given, so there the submission continues to drm_clflush_virt_range(cmd_buf, 0), which reads the byte before the buffer and faults on the vmap guard page. EXEC_CMD is reachable by any process that can open the render node. Reject the request instead. Fixes: 8ed8b0239617 ("accel/amdxdna: Add debug prints for command submission") Signed-off-by: Taimuraz Kaitmazov Reviewed-by: Lizhi Hou Signed-off-by: Lizhi Hou Link: https://patch.msgid.link/20260818000019.369366-1-taimuraz@kaitmazov.com

accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain

2026-08-24T16:29:41+00:00

struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check. Fixes: aac243092b70 ("accel/amdxdna: Add command execution") Reviewed-by: Max Zhen Signed-off-by: Lizhi Hou Link: https://patch.msgid.link/20260821033543.1839719-1-lizhi.hou@amd.com

Merge tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel

2026-08-21T15:41:00+00:00

Pull drm updates from Dave Airlie: "Highlights: - dmemcg eviction support is good for low VRAM things like Steam Machine - AMD adds gfx6-8 modifier support for older GPUs that enables a bunch of wayland stuff - i915/xe has some new hw support but also a lot of display refactoring Everything: perf: - export perf_allow_ APIs for xe udmabuf: - remove default size limit of 64MB rust: - i/o rework (signed tag from driver-core tree) - add registration guard and registration data - fix unbounded lifetimes in ioctl handler args - fix a drm_dev_register race - gem_shmem: add DmaResvGuard helper - gpuvm: require send/sync for driver data - implement send/sync for GpuVaAlloc and GpuVmBo - add SmContext lifetime - rename dma_handle to dma_address - change pci_sriov_get_totalvfs return to unsigned int core: - create drm_of_get_panel_orientation - send per-connector hotplug events - add thunderbolt UBHR tunneling support connector: - add color format property dmem: - introduce a peak file - accept one region per limit - add dmemcg support for eviction gpusvm: - reorg code to give drivers more flexibility atomic: - add create_state callback and helper - add documentation on atomic commit lifetime buddy: - add per-order free - add used block scoreboard - fix UAF - test buffer clearance on resume - add phys_addr->block helper gem: - drop DRIVER_GEM_GPUVA flag ttm: - be more aggressive allocating below protection limit sched: - add test suite for concurrent job submissions hdmi: - hook the color format property in helpers mipi-dsi: - add MIPI_DSI_MODE_DSC_ALL_SLICES_IN_PKT bridge: - add atomic create callbacks - drop atomic reset - display-connector: don't autoenable HPD IRQ - trigger initial HPD for DP - ti-sn65dsi83: remove NO_HFP and NO_HBP mode flags - analogix_dp: switch to DP link training helpers dp: - add support for DSC max delta BPP edid: - parse panel type from DisplayID 2.x Display Parameters sysfb: - improve panel, stride, framebuffer size validation panel: - implement ref counting for struct drm_panel - himax-hx83121a: add backlight regulator support - novatek-nt36672a: Inline panel init sequences - visionox-vtdr6130: enable DSC - novatek-nt37801: Use mipi_dsi_*_multi() functions - samsung-s6d16d0: Fix prepare error handling - support Novatek NT36536 plus DT bindings - sofef00: fix backlight updates - osd101t2587: use mipi_dsi_*_multi interface - panel-edp: adjust timing for AUO displays - panel-lvds: support Opto Logic SCX1001511GGC49 - panel-simple: support Kyocera tcg070wvlq - panel-edp: quirks - AUO B116XAT04.3, CMN N116BCP-EA2, CSW MNB601LS1-8 - BOE NV116WH2-M30, BOE NT116WHM-N21, BOE NV116FH1-M31 - BOE NV116FH1-M30, NV140FHM-N5B, TM156VDXP25 - BOE NE160QDM-NY1, MB116AS01 - new: - Samsung ATNA40HQ08-0, Anbernic TD4310 - Chipone ICNA35XX, Ilitek ILI9488 - Ilitek ILI7807S, Renesas R63419 - MNE001BS6-2, MNF601BS4-1, Sharp LQ120P1JX51 virtio: - add support for save/restore virtio_gpu_objects - abort vq wait on device removal amdgpu: - add color format DRM property - initial compute pipe reset support - add GFX 6-8 modifier support - initial DCN 6.0.0 support - dmemcg eviction support - improved boundary checking for bios parsing - RAS updates and rework - VCN secure submission fixes - 8K panel fix - Display KUNIT tests - parse panel type from DisplayID - Align IP discovery to pci device lifetime - SOC15 register macro cleanups - UVD memory placement fixes - GFX9 mode2 reset fixes - drop unnecessary BUG/BUG_ON - GFX8 soft reset rework - enable soft reset on GFX8 - PSP/SMU 15.0.9 update - VI ASPM fix - userq fixes - amdgpu_vm_get_task_info_pasid lifetime fix - DC CACP support - change system_unbound_wq with system_dfl_wq - Loosen VFCT bios parsing to deal with pci=realloc - SI/SMU7 AC/DC switch fix - VM fence handling fix - GEM close optimisation - Apple Studio Display fixes - DC FRL fixes amdkfd: - initial compute pipe reset support - allow applications to opt out of sigbus on fatal errors - improve CRIU boundary checks - MQD handling rework - move TBA/TMA from system to device memory - avoid topology-lock in kfd_mmap - SVM eviction fixes radeon: - fix unset CONFIG_ACPI build i915: - Novalake (NVL display version 35) timing generator enabling - NVL DC3CO enabling - enable UBHR link rates on thunderbolt tunnels - Reduce Xe3+ PM demand peak bandwidth - enable pipe DMC error interrupts for display 30+ - add kunit tests for DP link config selection - refactor and document DP link recovery - i915/xe driver display probe/remove/suspend/resume/shutdown cleanup and unification - i915/xe display runtime PM unified - Break i915 and xe panic dependency on struct intel_framebuffer - Streamline Pre/Post-CSC LUT loops - drop TGL DC3DO support - CDCLK santization - fix HDMI scrambling enable - fix phys bo pread/pwrite with offset - add missing nospec on parallel submit slot - fix some NULL derefs xe: - drop force_execlist module param - gate observation streams with perf_allow_cpu - skip FORCE_WC and vm_bound check for external dma-bufs - dmemcg eviction support - remove unused NVL-S GuC - TLB invalidation improvements - NVL-S updated PCI-IDs and w/a - madvise: optimise invalidation path - fix infinite gt-reset loop in timeout recovery - update TTM device benefical_order - wait on external BO kernel fences in exec ioctl - add/use more KLV helpers - sriov: disable display in admin only PF mode - add RAS GPU health indicator - optimise TTM populate for DONTNEED BO - drop force_probe for NVL-s - add debugfs for pcode info amdxdna: - disable device buffer export nova: - build nova-core/nova-drm from drivers/gpu - export nova-core rust symbols (workaround) - GSP boot process consolidation - Boot GSP with vGPU enabled - TLV firmware image format support - Hopper/Blackwell fixes and cleanups - I/O projection adoption tyr: - firmware loading and MCU boot - add generic slot manager + MMU - GPU VM support ARM64 LPAE page tables - add kernel buffer object for internal allocations - add parser for Mali CSF - add MCU booting nouveau: - race fixes - check instmem iomapping at first use - add dmemcg support - expose NVDEC channels - add scanline position/head state support for GSP qxl: - convert simple encoder to regular ethosu: - add perf counter support etnaviv: - force flush on power register ops msm: - support DSC configuration with slice_per_pkt > 1 mxsfb: - fix disable sequence panthor: - support sparse mappings rockchip: - switch away from simple helpers - support YUV background color - fix layer config timeout - add edp support for rk3576 - add batch command submission function rocket: - error handling and NULL ptr deref fixes sun4i: - switch away from simple helpers imagination: - mark BXM-4-64 MC1 as support host1x: - support tegra264 tegra: - add DSI for tegra 20/30 v3d: - reduce PM runtime autosuspend delay - scheduler fixes and refactoring - deprecate v3d 3.3 and 4.1 - validate CPU job query boundaries hibmc: - improve plane format handling - switch to gem shmem mediatek: - cec: correct compat for mt7623-8167? exynos: - remove simple dependency - add error handling to encoder paths - take i2c adapter module reference" * tag 'drm-next-2026-08-20' of https://gitlab.freedesktop.org/drm/kernel: (2074 commits) drm/xe/mcr: Take vcs1/vecs1 into account for first media slice drm/xe: Fix a bug in pc_adjust_freq_bounds() drm/xe: Fix xe_device_probe() failure drm/xe/drm_ras: Move has_drm_ras check to drm_ras layer drm/xe/ras: Fix boot-time ras error processing drm/amd/display: make DC_RUN_WITH_PREEMPTION_ENABLED misuse a build error drm/amd/pm: silence uninitialized variable warnings drm/amdgpu: skip BOs being torn down during GTT recovery drm/amdgpu: Reject UVD message with invalid number of h265 refs drm/amdgpu: keep PRT mappings off the vm_bo state lists drm/amdgpu: fix nbif 6.3.1 l1 low power not functional drm/amd/display: fix BT.2020 YCbCr output CSC matrices for DCE drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix drm/amdgpu: Implement insert_end for VCE 3 drm/amdgpu: Fix UVD min buffer sizes drm/amdgpu: Fix UVD decode image min size calculation drm/amdgpu: Fix UVD dpb min size calculation for H264 drm/amdgpu: Reject UVD message with dimensions above 4096 drm/amdgpu: check ASPM on the dGPU host link drm/radeon: fix autosuspend cleanup during teardown ...

Merge tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-08-21T01:17:08+00:00

Pull MM updates from Andrew Morton: - "mm: drop "sub" prefix from various places" (Dev Jain) page->folio conversion and a naming cleanup - "mm/kasan: remove redundant initialization for kasan_flag_write_only" (Igor Putko) KASAN cleanup work - "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling) Small speedup in the pagecaache read code - "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng) Improve the vmalloc code - mainly the avoidance of GFP_KERNEL allocations when the caller asked for GFP_NOFS or GFP_NOIO - "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno Leitao) Avoid a soft lockup watchdog trigger from the kmemleak scanning code in extreme situations - "mm/page_owner: misc cleanups" (Ye Liu) Cleanups to the page_owner code. For some reason lots of people have been working on the page_owner code this cycle. - "mm: convert to walk_page_range_vma() to eliminate find_vma()" (Kefeng Wang) Simplify and accelerate the page walking library function - "mm/migrate: preparatory cleanups for batch copy and offload" (Shivank Garg) Cleanups in the migration code - "mm/page_owner: add per-fd filter infrastructure for print_mode and NUMA filtering" (Zhen Ni) Per-fd filtering to page_owner in order to reduce the sometimes vast amount of output it can produce - "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song) Fixes and preparatory cleanups around bootmem HugeTLB handling, sparse initialization ordering, and related vmemmap setup - "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao) Reduce lock contention in zs_free(), which dominates the unmap path under memory pressure on Android (LMK kills) and on x86 servers running zswap-heavy workloads. Up to 1.83x improvement in microbenchmarking. - "move alloc_tag.c file under mm/" (Suren Baghdasaryan) - "samples/damon: handle damon_{start,stop}() failures" (SJ Park) Fix improper handling of damon_start(), damon_stop(), and damon_call() failures across DAMON sample modules to prevent potential memory leaks, operation disruptions and use-after-free bugs - "mm/damon/sysfs: kobject_del() directories that users can create/remove" (SJ Park) Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE causeing creation failures due to duplicate directory names by adding missing kobject_del() calls before creating new directories - "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand) Clean up the core pte handling code - "selftests/damon: misc fixes for test bugs" (Kunwu Chan) Fix several bugs in the DAMON selftests - "selftests/damon: fix memcg_path staging handling" (Cheng Nie) Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and add a test case for it in sysfs.py. - "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev) Selftest coverage for DAMON's refresh_ms sysfs feature by updating the test control module and verifying that scheme stats update automatically without manual intervention - "mm/damon: five misc fixups" (Akinobu Mita) Miscellaneous DAMON fixups. - "mm/damon/core: detect internal variation above max_nr_regions/2" (Jiayuan Chen) Fix DAMON's region splitting behavior when region counts exceed half the maximum budget by dynamically scaling down the split fraction as the limit approaches, preventing large regions from staying un-split, and add corresponding KUnit test coverage - "mm: preparatory patches for PMD level swap entries" (Usama Arif) Refactor and clean up PMD softleaf helpers, call sites, and architecture flags to lay the groundwork for a follow-up series that introduces PMD page table swap entries - "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ Park) Update DAMON design and ABI documentation, expands unit and selftest coverage, optimize damon_commit_target_regions(), and clean up recently added sysfs interface code for better readability - "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2" (Usama Arif) Optimize vmpressure() by skipping unnecessary work on cgroup v2 for userspace event notifications and refactor v1-only eventfd handling into mm/memcontrol-v1.c to reduce memory overhead and code complexity - "selftests/mm: refactor pkey helpers and fix mmap error handling" (Hongfu Li) Refactor pkeys shared tracing and assertion helpers into a common file, unify protection key selftests to use consistent diagnostic logging and assertions, and enforce standardized MAP_FAILED return checks for mmap() calls across the tests - "mm/damon: optimize out nr_accesses_bp" (SJ Park) Replace the error-prone, continuously updated nr_accesses_bp field in damon_region with an on-demand moving sum function, reducing structure memory overhead and avoiding state corruption bugs - "Open HugeTLB allocation routine for more generic use" (Ackerley Tng) Decouple HugeTLB folio allocation from VMA dependencies by introducing hugetlb_alloc_folio(), enabling subsystems like guest_memfd to allocate HugeTLB folios without standard VMA reservations or pseudo-VMAs - "mm/damon: provide pseudo moving sum probe_hits" (SJ Park) Integrate DAMON's probe_hits attribute counter into the pseudo moving sum infrastructure, enabling real-time, online monitoring without waiting for full aggregation intervals - "mm: Some cleanups for page allocator APIs" (Brendan Jackman) Simplify and refactor the page allocator entry points and flags by unifying allocation paths, adding internal alloc_flags arguments, and eliminating redundant __ prefixed alloc_pages variants. - "Fix incorrect access of hugetlb pte entries" (Dev Jain) Enforce the consistent use of huge_ptep_get() instead of ptep_get() for HugeTLB entries and fixes an unaligned address issue in arm64's huge_ptep_get() implementation - "mm/damon: validate all parameters in the core" (SJ Park) Consolidate parameter validation into the DAMON core specifically within damon_start() and damon_commit_ctx() to centralize error checking, eliminate caller-side redundant checks and to improve maintenance efficiency - "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong Chen) Rename is_need() to filter_record() for clearer return semantics, fix per-record allocation memory leaks and bound output copies in search_pattern() to address an existing buffer issue - "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen) Mitigate a system-wide stall which occurs when a cgroup is removed while one of its memory control files is doing synchronous reclaim - "mm/memory-failure: add panic option for unrecoverable pages" (Breno Leitao) Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl that immediately panics the kernel on unrecoverable memory errors in kernel-owned pages to preserve error context and prevent delayed, silent data corruption - "mm/damon: refactor damon_{start,stop,commit}() for simple error handling" (SJ Park) Refactor the DAMON core API functions to guarantee that all contexts are fully stopped when damon_start(), damon_stop(), or damon_commit() fail, eliminating the need for complex and error-prone caller-side cleanup code - "Keep tail page private zero at free and folio split" (Zi Yan) Add checks to ensure tail_page->private is zero when freeing compound or high-order pages and when promoting tail pages during large folio splits. By validating these fields at free and split time, it allows the removal of redundant private field clearing inside prep_compound_tail() - "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry Song) Eliminate redundant lru_add_drain() calls in wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock contention and system overhead By validating folio refcounts against the LRU cache before draining and removing unnecessary drains in the swap path, it achieves up to a 30.5% reduction in drain calls during heavy swap workloads - "mm: clean up folio LRU and swap declarations" (Jianyue Wu) Reorganize folio LRU and swap code by relocating page-cluster state to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving MM-internal reclaim declarations into mm/internal.h. - "userfaultfd: working set tracking for VM guest memory" (Kiryl Shutsemau) Add userfaultfd support for tracking the working set of VM guest memory, so a VMM can identify hot pages and reclaim cold ones to tiered or remote storage - "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David Hildenbrand) Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE, performing some smaller cleanups around freeing of reserved vmemmap pages on the way. - "mm/damon: update probe hits for runtime parameter commits" (SJ Park) Ensure that DAMON's probe_hits attribute counter is properly updated when monitoring intervals are changed at runtime, matching the behavior of nr_accesses. To achieve this, it refactors and renames existing helper functions for shared use, applies the updates to probe_hits, and handles edge cases in damon_probe_hits_mvsum() to maintain measurement accuracy. - "KSM: performance optimizations for rmap_walk_ksm" (xu xin) Resolve a severe KSM reverse-mapping performance bottleneck where thousands of split VMAs sharing a single anon_vma cause extended lock contention. By adding an interval-filtering check during the rmap walk, it reduces worst-case anon_vma lock hold times from over 500ms down to under 2ms, preventing application freezes and latency spikes under memory pressure. - "mm: split a couple of headers from internal.h" (Mike Rapoport) Split declarations related to mm_init, memblock, vmalloc and sparse into new headers - "KSM: use linear_page_index in collect_procs_ksm()" (xu xin) Apply the interval tree optimization from rmap_walk_ksm() to collect_procs_ksm() to avoid iterating over non-matching VMAs during KSM memory error handling. It hoists loop-invariant address initialization and restricts the anon_vma_interval_tree_foreach walk to a targeted page offset range, reducing redundant checks and improving lookup efficiency. - "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali Patil) Fix issues in the hugetlb and KSM MM selftest categories that can report failures when the prerequisites for the tests are not satisfied - "mm/damon: introduce data attributes only monitoring" (SJ Park) Introduce attribute-weighted region management in DAMON, allowing users to prioritize specific data attributes (such as page sizes or cgroups) over or instead of access monitoring. By assigning weights to attribute probes, DAMON can completely disable access tracking and adjust monitoring regions based on weighted probe-hit counters to optimize monitoring quality for attribute-focused workloads. - "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings" (Stanislav Kinsburskii) Extend hmm_range_fault() to support userfaultfd-backed regions by allowing the mmap lock to be dropped during fault handling via a new hmm_range_fault_locked() helper. By accepting a locked pointer and signaling retry status when lock release occurs, it enables page fault resolution in userfaultfd regions while preserving backward compatibility for existing callers. - "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes) Clean up and standardize how vma->vm_pgoff is accessed and manipulated across file-backed and anonymous mappings in the kernel It introduces dedicated helper functions such as vma_start_pgoff(), vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while renaming rmap interval tree helpers to better reflect their functionality. These changes establish a cleaner foundation for future work that will unify virtual page offset indexing for all anonymous and CoW'd folios. - "mm: handle device-private PMDs in walk callbacks" (Usama Arif) Address kernel panics and state corruption caused by MM walk callbacks reaching non-present device-private PMD swap entries created during HMM migrations It ensures that functions which acquire pmd_trans_huge_lock() properly recognize device-private PMDs instead of assuming a present THP or a standard migration entry. - "mm/rmap: Refactor try_to_unmap_one" (Dev Jain) Refactor try_to_unmap_one by modularizing Hugetlb, anonymous-lazyfree, and anonymous-swapbacked logic into dedicated functions, laying the structural groundwork for batched anonymous large folio unmapping. - "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu) Fix typos and fills in missing entries in the DAMON sysfs ABI document - "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price) Introduce an atomic sysfs state attribute and supporting DAX/MM infrastructure to prevent userland races when offlining and removing entire memory regions By adding an unplugged state alongside standard online modes, it enables whole-device atomic hotplug control while preserving backward compatibility. - "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes) Continue transitioning the kernel from the deprecated vm_flags_t type to vma_flags_t across core memory management infrastructure. It replaces legacy type usage in core functions such as do_mmap(), unmapped area allocation, mm->def_vma_flags, and VMA operations like mlock, mprotect, and mremap. - "Two small patches to clean up mm/mm_slot.h" (xu xin) Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate slot deletion sequences in khugepaged and KSM. It also adds code documentation explaining why mm_slot_lookup and mm_slot_insert must remain as preprocessor macros rather than static inline functions. - "mm/damon/core: hide core-private struct fields" (SJ Park) Clean up DAMON core structures by consistently marking internal-only fields with private: comment tags to prevent improper direct access from outer layers. It enforces encapsulation across core structures including damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to interact through approved access APIs instead of exposing raw struct members. - "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races" (SJ Park) Address potential infinite loops, NULL dereferences, and race conditions identified in DAMON It fixes an infinite loop triggered by extreme user configurations, a NULL pointer dereference within unit tests and minor monitoring accuracy degradation caused by subtle runtime races. - "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan Jackman) Fix an NMI safety flaw in __free_frozen_pages() where freeing pages on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks via non-PCP or isolated migration paths. It also resolves potential kernel crashes and privilege escalation risks triggered when BPF tracing runs in NMI context alongside memory hotplug or large allocation frees. - "mm/page_alloc: couple of followups for recent cleanups" (Brendan Jackman) Clean up and update page allocator nomenclature, documentation, and debug assertions. It aligns internal FPI_ flags with the public "nolock" naming convention, removes outdated internal implementation details from high-level page allocator comments, and eliminates obsolete VM_BUG_ON() assertions in allocation paths. - "mm/mseal: further cleanups" (Lorenzo Stoakes) Refactor and simplify the mseal implementation by clarifying API boundaries and removing unnecessary code complexity. It replaces generic do_mseal() usage outside the syscall with a dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO, eliminates mm_struct parameters to enforce that sealing applies only to current->mm, and streamlines overall logic and comments with no functional changes intended. - "mm/vmscan: fix swappiness=max and clean up per-node proactive reclaim" (Ridong Chen) Resolve reclaim behavior bugs and clean up function parameters across memory reclaim paths It fixes swappiness=max in both standard reclaim and MGLRU so unswappable anonymous memory no longer falls back to evicting page cache, ensures reclaim_store() returns accurate error codes instead of collapsing all failures into -EAGAIN, and removes the obsolete gfp_mask parameter from __node_reclaim(). - "mm: mincore: misc cleanups" (Kefeng Wang) Clean up and simplifies the mincore code. Most importantly, it removes the historical special behavior that always reports VM_PFNMAP pages as non-resident. - "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau) Two trivial cleanups in the folio split API - "mm/damon: fix uninitialized DAMOS field and kunit exec expectation bugs" (SJ Park) Resolve minor operational and testing bugs in DAMON identified by Sashiko. It initializes the damos->last_applied field to prevent occasional efficiency degradation and fixes invalid memory accesses in DAMON KUnit tests during test failure handling. - "cleanup for stable_page_flags()" (Jinjiang Tu) Clean up and refactor stable_page_flags() used by /proc/kpageflags without altering functionality. It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag bits, converts folio-specific flag checks to standard folio_test_*() helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling. - "Batch unmap of uffd-wp file folios" (Dev Jain) Extend batched folio unmapping support to file folios within userfaultfd write-protect (uffd-wp) VMAs by adding batching capabilities to pte_install_uffd_wp_if_needed(). This removes special-case restrictions on uffd-wp VMAs in try_to_unmap_one(), significantly simplifying the function's control flow and complexity. - "mm/early_ioremap: clarify and clean up early_ioremap_reset()" (Sang-Heon Jeon) Clarify and clean up the architecture-specific usage of __late_set_fixmap() and __late_clear_fixmap() after early_ioremap_reset() It adds explicit documentation regarding when early_ioremap_reset() must be called and removes redundant macro definitions and reset calls in the RISC-V and ARM64 architectures. - "mm: fix reclaim storms in defrag_mode" (Johannes Weiner) Address severe performance regressions, swap storms, and spurious OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta production It updates the page allocator slowpath so non-movable allocation requests actively trigger direct reclaim and direct compaction at pageblock_order scale, allowing them to claim whole pageblocks rather than spinning unproductively. - "zram: lockmap tweaks" (Sebastian Siewior) Optimize and fix lockdep tracking for zram devices by consolidating per-entry lockmaps and isolate lock classes across multiple instances This reduces memory overhead by replacing per-entry lockdep_map instances with a single map per struct zram, and assigns a dynamic lock_class_key to each instance to prevent false deadlock reports when different zram devices are backed by distinct filesystems. * tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits) selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check selftests/mm: unpoison pages in memory-failure teardown mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn() mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro mm/zsmalloc: fix release order of locks in zs_page_migrate() Documentation: zram: remove sections numbering ksm: stop iterating VMAs when ksm_test_exit returns true mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch() zram: use a custom key for each zram object zram: move lockmap to be per-zram instead per table selftests/mm: fix gup_longterm EINVAL error message mm: page_alloc: fix non-movable reclaim storm in defrag_mode mm: page_alloc: move capture_control to the page allocator mm: compaction: support non-movable compaction for pageblock requests mm: page_alloc: __GFP_FS lockdep annotation for direct compaction hugetlb: evaluate subpool free state while locked mm/damon: remove trailing semicolons after function definitions mm/damon/ops-common: prevent migration fallback to non-target nodes mm/damon: update outdated comment about DAMOS filter handling ...

BackMerge tag 'v7.2' into drm-next

2026-08-20T00:58:44+00:00

Linux 7.2 There was a lot of conflicts this round between fixes and next, and I'd like to get the merge resolutions that we have in drm-tip. Signed-off-by: Dave Airlie