linux-next.git/Documentation/core-api, branch master

Merge branch 'docs-next' of git://git.lwn.net/linux.git

2026-07-03T14:44:18+00:00

maple_tree: document erase and allocations better

2026-07-03T06:27:27+00:00

During a discussion on the maple tree erase process and GFP flags, Jason suggested there be an amendment to the documentation to clarify the situation on allocations within the tree. The added text is an attempt to better explain that the tree may allocate, even when erasing, and provide some guidance on how to work around such issues. Link: https://lore.kernel.org/all/20260617180419.GA231643@ziepe.ca/ Link: https://lore.kernel.org/20260630190843.3563858-16-liam@infradead.org Signed-off-by: Liam R. Howlett (Oracle) Suggested-by: Jason Gunthorpe Cc: Rik van Riel Cc: Boqun Feng Cc: Chris Mason Cc: Chuck Lever Cc: Ingo Molnar Cc: Joe Perches Cc: Peter Zijlstra Cc: Waiman Long Cc: Will Deacon Signed-off-by: Andrew Morton

maple_tree: documentation fix

2026-07-03T06:27:24+00:00

Don't include the word flag in the quotes with the actual flag. Link: https://lore.kernel.org/20260630190843.3563858-5-liam@infradead.org Signed-off-by: Liam R. Howlett (Oracle) Cc: Boqun Feng Cc: Chris Mason Cc: Chuck Lever Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Joe Perches Cc: Peter Zijlstra Cc: Rik van Riel Cc: Waiman Long Cc: Will Deacon Signed-off-by: Andrew Morton

mm: add writeback.h to docs build

2026-07-03T06:26:55+00:00

There's four functions in this header file with kernel-doc; add them to the htmldocs. Link: https://lore.kernel.org/20260615162244.2170866-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Cc: Andreas Gruenbacher Signed-off-by: Andrew Morton

Docs: SMP: add an SMP docbook chapter

2026-06-30T19:44:28+00:00

Add SMP primitives to the core-api documentation. Signed-off-by: Randy Dunlap Acked-by: Thomas Gleixner Signed-off-by: Jonathan Corbet Message-ID: <20260625210331.1050915-1-rdunlap@infradead.org>

Merge tag 'liveupdate-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux

2026-06-21T16:46:14+00:00

Pull liveupdate updates from Mike Rapoport: "Kexec Handover (KHO): - make memory preservation compatible with deferred initialization of the memory map Live Update Orchestrator (LUO): - add LIVEUPDATE_SESSION_GET_NAME ioctl and parameter verification for LIVEUPDATE_IOCTL_CREATE_SESSION ioctl - documentation updates for liveupdate=on command line option, systemd support and the current compatibility status - remove the fixed limits on the number of files that can be preserved within a single session, and the total number of sessions managed by the LUO Misc fixes: - reference count incoming File-Lifecycle-Bound (FLB) data so it cannot be freed while a subsystem is still using it - fixes for a TOCTOU race in luo_session_retrieve(), a use- after-free in the file finish and unpreserve paths, concurrent session mutations during reboot and serialization on preserve_context kexec - make sure ioctls for incoming LUO sessions are blocked for outgoing sessions and vice versa - make sure KHO scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES - fix memblock tests build issue introduced by KHO changes" * tag 'liveupdate-v7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux: (36 commits) liveupdate: Document that retrieve failure is permanent docs: memfd_preservation: fix rendering of ABI documentation selftests/liveupdate: Add stress-files kexec test selftests/liveupdate: Add stress-sessions kexec test selftests/liveupdate: Test session and file limit removal liveupdate: Remove limit on the number of files per session liveupdate: Remove limit on the number of sessions liveupdate: defer session block allocation and physical address setting kho: add support for linked-block serialization liveupdate: Extract luo_session_deserialize_one helper liveupdate: Extract luo_file_deserialize_one helper liveupdate: register luo_ser as KHO subtree liveupdate: centralize state management into struct luo_ser liveupdate: avoid mixing cleanup guards with goto in luo_session_retrieve_fd liveupdate: change file_set->count type to u64 for type safety liveupdate: Remove unused ser field from struct luo_session liveupdate: fix u-a-f in luo_file_unpreserve_files() and luo_file_finish() liveupdate: block session mutations during reboot liveupdate: fix TOCTOU race in luo_session_retrieve() liveupdate: skip serialization for context-preserving kexec ...

Merge tag 'printk-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2026-06-17T19:05:20+00:00

Pull printk updates from Petr Mladek: - Add upper case flavor for printing MAC addresses (%p[mM][U]) and use it in the nintendo driver - Fix matching of hash_pointers= parameter modes - Fix size check of vsprintf() field_width and precision values - Add check of size returned by vsprintf() - Add KUnit test for restricted pointer printing (%pK) - Some code cleanup * tag 'printk-for-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: HID: nintendo: Use %pM format specifier for MAC addresses vsprintf: Add upper case flavour to %p[mM] lib/vsprintf: replace min_t/max_t with min/max printk: fix typos in comments lib/vsprintf: Require exact hash_pointers mode matches vsprintf: Add test for restricted kernel pointers vsprintf: Only export no_hash_pointers to test module lib/vsprintf: Limit the returning size to INT_MAX lib/vsprintf: Fix to check field_width and precision

Merge tag 'for-7.2/block-20260615' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2026-06-16T07:32:47+00:00

Pull block updates from Jens Axboe: - NVMe pull request via Keith: - Per-controller admin and IO timeout sysfs attributes, and letting the block layer set request timeouts (Maurizio, Maximilian) - Multipath passthrough iostats, and PCI P2PDMA enablement for multipath devices (Keith, Kiran) - A new diag sysfs attribute group exporting per-controller counters (retries, multipath failover, error counters, requeue and failure counts, reset and reconnect events) (Nilay) - FDP configuration validation and bounds check fixes (liuxixin) - Various nvmet fixes, including a pre-auth out-of-bounds read in the Discovery Get Log Page handler, auth payload bounds validation, and tcp error-path leak fixes (Bryam, Tianchu, Geliang) - nvme-tcp lockdep and workqueue fixes (Shin'ichiro, Kuniyuki, Eric) - Assorted other fixes and cleanups (John, Yao, Chao, Mateusz, Achkinazi, Wentao) - MD pull request via Yu Kuai: - raid1/raid10 fixes for a deadlock in the read error recovery path, error-path detection and bio accounting with cloned bios, and an nr_pending leak in the REQ_ATOMIC bad-block error path (Abd-Alrhman) - PCI P2PDMA propagation from member devices to the RAID device (Kiran) - dm-raid bio requeue fix, and various smaller fixes and cleanups (Benjamin, Chen, Li, Thorsten) - Enable Clang lock context analysis for the block layer, with the accompanying annotations across queue limits, the blk_holder_ops callbacks, crypto, cgroup, iocost, kyber and mq-deadline (Bart) - Block status code infrastructure work: a tagged status table, a str_to_blk_op() helper, a bio_endio_status() helper, and on top of that a new configurable block-layer error injection facility (Christoph) - DRBD netlink rework, replacing the genl_magic machinery with explicit netlink serialization and moving the DRBD UAPI headers to include/uapi/linux/ (Christoph Böhmwalder) - bvec improvements: a bvec_folio() helper and making the bvec_iter helpers proper inline functions (Willy, Christoph) - ublk cleanups and a canceling-flag fix for the disk-not-allocated case (Caleb, Ming) - Partition handling fixes: bound the AIX pp_count scan, fix an of_node refcount leak, and replace __get_free_page() with kmalloc() (Bryam, Wentao, Mike) - Convert numa_node to int in blk_mq_hw_ctx and ->init_request, and add WQ_PERCPU to the block workqueue users (Mateusz, Marco) - Block statistics and tracing: propagate in-flight to the whole disk on partition IO, export passthrough stats, and a new block_rq_tag_wait tracepoint (Tang, Keith, Aaron) - A round of removals, unexports and cleanups across bio, direct-io and the bvec helpers (Christoph) - Various driver fixes (mtip32xx use-after-free, rbd snap_count validation and strscpy conversion, nbd socket lockdep reclassify, virtio-blk zone report clamp, floppy) and a batch of MAINTAINERS email/list updates (Coly, Li, Yu, Christoph Böhmwalder) - Other little fixes and cleanups all over * tag 'for-7.2/block-20260615' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (117 commits) MAINTAINERS: Update Coly Li's email address block: check bio split for unaligned bvec nbd: Reclassify sockets to avoid lockdep circular dependency block: add configurable error injection block: add a str_to_blk_op helper block: add a "tag" for block status codes block: add a macro to initialize the status table floppy: Drop unused pnp driver data block: propagate in_flight to whole disk on partition I/O virtio-blk: clamp zone report to the report buffer capacity block: optimize I/O merge hot path with unlikely() hints drivers/block/rbd: Use strscpy() to copy strings into arrays partitions: aix: bound the pp_count scan to the ppe array block: Enable lock context analysis block/mq-deadline: Make the lock context annotations compatible with Clang block/Kyber: Make the lock context annotations compatible with Clang block/blk-mq-debugfs: Improve lock context annotations block/blk-iocost: Inline iocg_lock() and iocg_unlock() block/blk-iocost: Split ioc_rqos_throttle() block/crypto: Annotate the crypto functions ...

vsprintf: Add upper case flavour to %p[mM]

2026-06-12T12:20:25+00:00

Some of the (ABI aware) code needs an upper case when printing MAC addresses. Introduce an extension for that into the existing %p[mM]. Signed-off-by: Andy Shevchenko Reviewed-by: Petr Mladek Link: https://patch.msgid.link/20260603104351.152085-2-andriy.shevchenko@linux.intel.com Signed-off-by: Petr Mladek

kho: add support for linked-block serialization

2026-06-03T18:15:46+00:00

Introduce a linked-block serialization mechanism for state handover. Previously, LUO used contiguous memory blocks for serializing sessions and files, which imposed limits on the total number of items that could be preserved across a live update. This commit adds the infrastructure for a more flexible, block-based approach where serialized data is stored in a chain of linked blocks. This is a generic KHO serialization block infrastructure that can be used by multiple subsystems. Signed-off-by: Pasha Tatashin Link: https://patch.msgid.link/20260603154402.468928-8-pasha.tatashin@soleen.com Signed-off-by: Mike Rapoport (Microsoft)