user/sven/linux.git/scripts/checkpatch.pl, branch v6.18.1

checkpatch: suppress strscpy warnings for userspace tools

2025-09-28T18:36:13Z

The checkpatch.pl script currently warns against the use of strcpy, strlcpy, and strncpy, recommending strscpy as a safer alternative. However, these warnings are also triggered for code under tools/ and scripts/, which are userspace utilities where strscpy is not available. This patch suppresses these warnings for files in tools/ and scripts/. Link: https://lkml.kernel.org/r/20250923171722.7798-1-suchitkarunakaran@gmail.com Signed-off-by: Suchit Karunakaran Acked-by: Joe Perches Cc: Andy Whitcroft Cc: Dwaipayan Ray Cc: Lukas Bulwahn Cc: Shuah Khan Signed-off-by: Andrew Morton

checkpatch: allow http links of any length in commit logs

2025-09-14T00:32:45Z

Dave Gilbert noticed that checkpatch warns about URL links over 75 chars in length in commit logs. Fix that. Link: https://lkml.kernel.org/r/3529faaf84a5a9a96c5c0ec4183ae0ba6e97673c.camel@perches.com Signed-off-by: Joe Perches Cc: Dave Gilbert Signed-off-by: Andrew Morton

Merge tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-08-03T23:23:09Z

Pull non-MM updates from Andrew Morton: "Significant patch series in this pull request: - "squashfs: Remove page->mapping references" (Matthew Wilcox) gets us closer to being able to remove page->mapping - "relayfs: misc changes" (Jason Xing) does some maintenance and minor feature addition work in relayfs - "kdump: crashkernel reservation from CMA" (Jiri Bohac) switches us from static preallocation of the kdump crashkernel's working memory over to dynamic allocation. So the difficulty of a-priori estimation of the second kernel's needs is removed and the first kernel obtains extra memory - "generalize panic_print's dump function to be used by other kernel parts" (Feng Tang) implements some consolidation and rationalization of the various ways in which a failing kernel splats information at the operator * tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (80 commits) tools/getdelays: add backward compatibility for taskstats version kho: add test for kexec handover delaytop: enhance error logging and add PSI feature description samples: Kconfig: fix spelling mistake "instancess" -> "instances" fat: fix too many log in fat_chain_add() scripts/spelling.txt: add notifer||notifier to spelling.txt xen/xenbus: fix typo "notifer" net: mvneta: fix typo "notifer" drm/xe: fix typo "notifer" cxl: mce: fix typo "notifer" KVM: x86: fix typo "notifer" MAINTAINERS: add maintainers for delaytop ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below() ucount: fix atomic_long_inc_below() argument type kexec: enable CMA based contiguous allocation stackdepot: make max number of pools boot-time configurable lib/xxhash: remove unused functions init/Kconfig: restore CONFIG_BROKEN help text lib/raid6: update recov_rvv.c zero page usage docs: update docs after introducing delaytop ...

Merge tag 'rcu.release.v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

2025-07-30T18:01:41Z

Pull RCU updates from Neeraj Upadhyay: "Expedited grace period updates: - Protect against early RCU exp quiescent state reporting during exp grace period initialization - Remove superfluous barrier in task unblock path - Remove the CPU online quiescent state report optimization, which is error prone for certain scenarios - Add warning for unexpected pending requested expedited quiescent state on dying CPU Core: - Robustify rcu_is_cpu_rrupt_from_idle() by using more accurate indicators of the actual context tracking state of a CPU - Handle ->defer_qs_iw_pending field data race - Enable rcu_normal_wake_from_gp by default on systems with <= 16 CPUs - Fix lockup in rcu_read_unlock() due to recursive irq_exit() calls - Refactor expedited handling condition in rcu_read_unlock_special() - Documentation updates for hotplug and GP init scan ordering, separation of rcu_state and rnp's gp_seq states, quiescent state reporting for offline CPUs torture-scripts: - Cleanup and improve scripts : remove superfluous warnings for disabled tests; better handling of kvm.sh --kconfig arg; suppress some confusing diagnostics; tolerate bad kvm.sh args; add new diagnostic for build output; fail allmodconfig testing on warnings - Include RCU_TORTURE_TEST_CHK_RDR_STATE config for KCSAN kernels - Disable default RCU-tasks and clocksource-wdog testing on arm64 - Add EXPERT Kconfig option for arm64 KCSAN runs - Remove SRCU-lite testing rcutorture: - Start torture writer threads creation after reader threads to handle race in SRCU-P scenario - Add SRCU down_read()/up_read() test - Add diagnostics for delayed SRCU up_read(), unmatched up_read(), print number of up/down readers and the number of such readers which migrated to other CPU - Ignore certain unsupported configurations for trivial RCU test - Fix splats in RT kernels due to inaccurate checks for BH-disabled context - Enable checks and logs to capture intentionally exercised unexpected scenarios (too short readers) for BUSTED test - Remove SRCU-lite testing srcu: - Expedite SRCU-fast grace periods - Remove SRCU-lite implementation - Add guards for SRCU-fast readers rcu nocb: - Dump NOCB group leader state on stall detection - Robustify nocb_cb_kthread pointer accesses - Fix delayed execution of hurry callbacks when LAZY_RCU is enabled refscale: - Fix multiplication overflow in "loops" and "nreaders" calculations" * tag 'rcu.release.v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux: (49 commits) rcu: Document concurrent quiescent state reporting for offline CPUs rcu: Document separation of rcu_state and rnp's gp_seq rcu: Document GP init vs hotplug-scan ordering requirements srcu: Add guards for SRCU-fast readers rcu: Fix delayed execution of hurry callbacks rcu: Refactor expedited handling check in rcu_read_unlock_special() checkpatch: Remove SRCU-lite deprecation srcu: Remove SRCU-lite implementation srcu: Expedite SRCU-fast grace periods rcutorture: Remove support for SRCU-lite rcutorture: Remove SRCU-lite scenarios torture: Remove support for SRCU-lite torture: Make torture.sh --allmodconfig testing fail on warnings torture: Add "ERROR" diagnostic for testing kernel-build output torture: Make torture.sh tolerate runs having bad kvm.sh arguments torture: Add textid.txt file to --do-allmodconfig and --do-rcu-rust runs torture: Extract testid.txt generation to separate script torture: Suppress "find" diagnostics from torture.sh --do-none run torture: Provide EXPERT Kconfig option for arm64 KCSAN torture.sh runs rcu: Fix rcu_read_unlock() deadloop due to IRQ work ...

checkpatch: Remove SRCU-lite deprecation

2025-07-16T04:21:27Z

Now that SRCU-lite has been removed from the kernel, let's remove the now-redundant deprecation from checkpatch.pl. Signed-off-by: "Paul E. McKenney" Signed-off-by: Neeraj Upadhyay (AMD)

checkpatch: check for missing sentinels in ID arrays

2025-07-10T05:57:57Z

All of the ID tables based on (of_device_id, pci_device_id, ...) require their arrays to end in an empty sentinel value. That's usually spelled with an empty initializer entry (e.g., "{}"), but also sometimes with explicit 0 entries, field initializers (e.g., '.id = ""'), or even a macro entry (like PCMCIA_DEVICE_NULL). Without a sentinel, device-matching code may read out of bounds. I've found a number of such bugs in driver reviews, and we even occasionally commit one to the tree. See commit 5751eee5c620 ("i2c: nomadik: Add missing sentinel to match table") for example. Teach checkpatch to find these ID tables, and complain if it looks like there wasn't a sentinel value. Test output: $ git format-patch -1 a0d15cc47f29be6d --stdout | scripts/checkpatch.pl - ERROR: missing sentinel in ID array #57: FILE: drivers/i2c/busses/i2c-nomadik.c:1073: +static const struct of_device_id nmk_i2c_eyeq_match_table[] = { { .compatible = "XXXXXXXXXXXXXXXXXX", .data = (void *)(NMK_I2C_EYEQ_FLAG_32B_BUS | NMK_I2C_EYEQ_FLAG_IS_EYEQ5), }, }; total: 1 errors, 0 warnings, 66 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. "[PATCH] i2c: nomadik: switch from of_device_is_compatible() to" has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. When run across the entire tree (scripts/checkpatch.pl -q --types MISSING_SENTINEL -f ...), false positives exist: * where macros are used that hide the table from analysis (e.g., drivers/gpu/drm/radeon/radeon_drv.c / radeon_PCI_IDS). There are fewer than 5 of these. * where such tables are processed correctly via ARRAY_SIZE() (fewer than 5 instances). This is by far not the typical usage of *_device_id arrays. * some odd parsing artifacts, where ctx_statement_block() seems to quit in the middle of a block due to #if/#else/#endif. Also, not every "struct *_device_id" is in fact a sentinel-requiring structure, but even with such types, false positives are very rare. Link: https://lkml.kernel.org/r/20250702235245.1007351-1-briannorris@chromium.org Signed-off-by: Brian Norris Acked-by: Joe Perches Cc: Andy Whitcroft Cc: Brian Norris Cc: Dwaipayan Ray Cc: Lukas Bulwahn Signed-off-by: Andrew Morton

checkpatch: use utf-8 match for spell checking

2025-07-10T05:57:53Z

The current code that checks for misspelling verifies, in a more complex regex, if $rawline matches [^\w]($misspellings)[^\w] Being $rawline a byte-string, a utf-8 character in $rawline can match the non-word-char [^\w]. E.g.: ./scripts/checkpatch.pl --git 81c2f059ab9 WARNING: 'ment' may be misspelled - perhaps 'meant'? #36: FILE: MAINTAINERS:14360: +M: Clément Léger ^^^^ Use a utf-8 version of $rawline for spell checking. Link: https://lkml.kernel.org/r/20250616-b4-checkpatch-upstream-v2-1-5600ce4a3b43@foss.st.com Signed-off-by: Antonio Borneo Signed-off-by: Clément Le Goffic Cc: Andy Whitcroft Cc: Dwaipayan Ray Cc: Joe Perches Cc: Lukas Bulwahn Signed-off-by: Andrew Morton

checkpatch: check for comment explaining rgmii(|-rxid|-txid) PHY modes

2025-06-26T12:49:10Z

Historically, the RGMII PHY modes specified in Device Trees have been used inconsistently, often referring to the usage of delays on the PHY side rather than describing the board; many drivers still implement this incorrectly. Require a comment in Devices Trees using these modes (usually mentioning that the delay is realized on the PCB), so we can avoid adding more incorrect uses (or will at least notice which drivers still need to be fixed). Suggested-by: Andrew Lunn Signed-off-by: Matthias Schiffer Reviewed-by: Andrew Lunn Link: https://patch.msgid.link/bc112b8aa510cf9df9ab33178d122f234d0aebf7.1750756583.git.matthias.schiffer@ew.tq-group.com Signed-off-by: Paolo Abeni

Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-06-01T02:12:53Z

Pull non-MM updates from Andrew Morton: - "hung_task: extend blocking task stacktrace dump to semaphore" from Lance Yang enhances the hung task detector. The detector presently dumps the blocking tasks's stack when it is blocked on a mutex. Lance's series extends this to semaphores - "nilfs2: improve sanity checks in dirty state propagation" from Wentao Liang addresses a couple of minor flaws in nilfs2 - "scripts/gdb: Fixes related to lx_per_cpu()" from Illia Ostapyshyn fixes a couple of issues in the gdb scripts - "Support kdump with LUKS encryption by reusing LUKS volume keys" from Coiby Xu addresses a usability problem with kdump. When the dump device is LUKS-encrypted, the kdump kernel may not have the keys to the encrypted filesystem. A full writeup of this is in the series [0/N] cover letter - "sysfs: add counters for lockups and stalls" from Max Kellermann adds /sys/kernel/hardlockup_count and /sys/kernel/hardlockup_count and /sys/kernel/rcu_stall_count - "fork: Page operation cleanups in the fork code" from Pasha Tatashin implements a number of code cleanups in fork.c - "scripts/gdb/symbols: determine KASLR offset on s390 during early boot" from Ilya Leoshkevich fixes some s390 issues in the gdb scripts * tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (67 commits) llist: make llist_add_batch() a static inline delayacct: remove redundant code and adjust indentation squashfs: add optional full compressed block caching crash_dump, nvme: select CONFIGFS_FS as built-in scripts/gdb/symbols: determine KASLR offset on s390 during early boot scripts/gdb/symbols: factor out pagination_off() scripts/gdb/symbols: factor out get_vmlinux() kernel/panic.c: format kernel-doc comments mailmap: update and consolidate Casey Connolly's name and email nilfs2: remove wbc->for_reclaim handling fork: define a local GFP_VMAP_STACK fork: check charging success before zeroing stack fork: clean-up naming of vm_stack/vm_struct variables in vmap stacks code fork: clean-up ifdef logic around stack allocation kernel/rcu/tree_stall: add /sys/kernel/rcu_stall_count kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count x86/crash: make the page that stores the dm crypt keys inaccessible x86/crash: pass dm crypt keys to kdump kernel Revert "x86/mm: Remove unused __set_memory_prot()" crash_dump: retrieve dm crypt keys in kdump kernel ...

Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2025-05-28T22:24:36Z

Pull networking updates from Paolo Abeni: "Core: - Implement the Device Memory TCP transmit path, allowing zero-copy data transmission on top of TCP from e.g. GPU memory to the wire. - Move all the IPv6 routing tables management outside the RTNL scope, under its own lock and RCU. The route control path is now 3x times faster. - Convert queue related netlink ops to instance lock, reducing again the scope of the RTNL lock. This improves the control plane scalability. - Refactor the software crc32c implementation, removing unneeded abstraction layers and improving significantly the related micro-benchmarks. - Optimize the GRO engine for UDP-tunneled traffic, for a 10% performance improvement in related stream tests. - Cover more per-CPU storage with local nested BH locking; this is a prep work to remove the current per-CPU lock in local_bh_disable() on PREMPT_RT. - Introduce and use nlmsg_payload helper, combining buffer bounds verification with accessing payload carried by netlink messages. Netfilter: - Rewrite the procfs conntrack table implementation, improving considerably the dump performance. A lot of user-space tools still use this interface. - Implement support for wildcard netdevice in netdev basechain and flowtables. - Integrate conntrack information into nft trace infrastructure. - Export set count and backend name to userspace, for better introspection. BPF: - BPF qdisc support: BPF-qdisc can be implemented with BPF struct_ops programs and can be controlled in similar way to traditional qdiscs using the "tc qdisc" command. - Refactor the UDP socket iterator, addressing long standing issues WRT duplicate hits or missed sockets. Protocols: - Improve TCP receive buffer auto-tuning and increase the default upper bound for the receive buffer; overall this improves the single flow maximum thoughput on 200Gbs link by over 60%. - Add AFS GSSAPI security class to AF_RXRPC; it provides transport security for connections to the AFS fileserver and VL server. - Improve TCP multipath routing, so that the sources address always matches the nexthop device. - Introduce SO_PASSRIGHTS for AF_UNIX, to allow disabling SCM_RIGHTS, and thus preventing DoS caused by passing around problematic FDs. - Retire DCCP socket. DCCP only receives updates for bugs, and major distros disable it by default. Its removal allows for better organisation of TCP fields to reduce the number of cache lines hit in the fast path. - Extend TCP drop-reason support to cover PAWS checks. Driver API: - Reorganize PTP ioctl flag support to require an explicit opt-in for the drivers, avoiding the problem of drivers not rejecting new unsupported flags. - Converted several device drivers to timestamping APIs. - Introduce per-PHY ethtool dump helpers, improving the support for dump operations targeting PHYs. Tests and tooling: - Add support for classic netlink in user space C codegen, so that ynl-c can now read, create and modify links, routes addresses and qdisc layer configuration. - Add ynl sub-types for binary attributes, allowing ynl-c to output known struct instead of raw binary data, clarifying the classic netlink output. - Extend MPTCP selftests to improve the code-coverage. - Add tests for XDP tail adjustment in AF_XDP. New hardware / drivers: - OpenVPN virtual driver: offload OpenVPN data channels processing to the kernel-space, increasing the data transfer throughput WRT the user-space implementation. - Renesas glue driver for the gigabit ethernet RZ/V2H(P) SoC. - Broadcom asp-v3.0 ethernet driver. - AMD Renoir ethernet device. - ReakTek MT9888 2.5G ethernet PHY driver. - Aeonsemi 10G C45 PHYs driver. Drivers: - Ethernet high-speed NICs: - nVidia/Mellanox (mlx5): - refactor the steering table handling to significantly reduce the amount of memory used - add support for complex matches in H/W flow steering - improve flow streeing error handling - convert to netdev instance locking - Intel (100G, ice, igb, ixgbe, idpf): - ice: add switchdev support for LLDP traffic over VF - ixgbe: add firmware manipulation and regions devlink support - igb: introduce support for frame transmission premption - igb: adds persistent NAPI configuration - idpf: introduce RDMA support - idpf: add initial PTP support - Meta (fbnic): - extend hardware stats coverage - add devlink dev flash support - Broadcom (bnxt): - add support for RX-side device memory TCP - Wangxun (txgbe): - implement support for udp tunnel offload - complete PTP and SRIOV support for AML 25G/10G devices - Ethernet NICs embedded and virtual: - Google (gve): - add device memory TCP TX support - Amazon (ena): - support persistent per-NAPI config - Airoha: - add H/W support for L2 traffic offload - add per flow stats for flow offloading - RealTek (rtl8211): add support for WoL magic packet - Synopsys (stmmac): - dwmac-socfpga 1000BaseX support - add Loongson-2K3000 support - introduce support for hardware-accelerated VLAN stripping - Broadcom (bcmgenet): - expose more H/W stats - Freescale (enetc, dpaa2-eth): - enetc: add MAC filter, VLAN filter RSS and loopback support - dpaa2-eth: convert to H/W timestamping APIs - vxlan: convert FDB table to rhashtable, for better scalabilty - veth: apply qdisc backpressure on full ring to reduce TX drops - Ethernet switches: - Microchip (kzZ88x3): add ETS scheduler support - Ethernet PHYs: - RealTek (rtl8211): - add support for WoL magic packet - add support for PHY LEDs - CAN: - Adds RZ/G3E CANFD support to the rcar_canfd driver. - Preparatory work for CAN-XL support. - Add self-tests framework with support for CAN physical interfaces. - WiFi: - mac80211: - scan improvements with multi-link operation (MLO) - Qualcomm (ath12k): - enable AHB support for IPQ5332 - add monitor interface support to QCN9274 - add multi-link operation support to WCN7850 - add 802.11d scan offload support to WCN7850 - monitor mode for WCN7850, better 6 GHz regulatory - Qualcomm (ath11k): - restore hibernation support - MediaTek (mt76): - WiFi-7 improvements - implement support for mt7990 - Intel (iwlwifi): - enhanced multi-link single-radio (EMLSR) support on 5 GHz links - rework device configuration - RealTek (rtw88): - improve throughput for RTL8814AU - RealTek (rtw89): - add multi-link operation support - STA/P2P concurrency improvements - support different SAR configs by antenna - Bluetooth: - introduce HCI Driver protocol - btintel_pcie: do not generate coredump for diagnostic events - btusb: add HCI Drv commands for configuring altsetting - btusb: add RTL8851BE device 0x0bda:0xb850 - btusb: add new VID/PID 13d3/3584 for MT7922 - btusb: add new VID/PID 13d3/3630 and 13d3/3613 for MT7925 - btnxpuart: implement host-wakeup feature" * tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1611 commits) selftests/bpf: Fix bpf selftest build warning selftests: netfilter: Fix skip of wildcard interface test net: phy: mscc: Stop clearing the the UDPv4 checksum for L2 frames net: openvswitch: Fix the dead loop of MPLS parse calipso: Don't call calipso functions for AF_INET sk. selftests/tc-testing: Add a test for HFSC eltree double add with reentrant enqueue behaviour on netem net_sched: hfsc: Address reentrant enqueue adding class to eltree twice octeontx2-pf: QOS: Refactor TC_HTB_LEAF_DEL_LAST callback octeontx2-pf: QOS: Perform cache sync on send queue teardown net: mana: Add support for Multi Vports on Bare metal net: devmem: ncdevmem: remove unused variable net: devmem: ksft: upgrade rx test to send 1K data net: devmem: ksft: add 5 tuple FS support net: devmem: ksft: add exit_wait to make rx test pass net: devmem: ksft: add ipv4 support net: devmem: preserve sockc_err page_pool: fix ugly page_pool formatting net: devmem: move list_add to net_devmem_bind_dmabuf. selftests: netfilter: nft_queue.sh: include file transfer duration in log message net: phy: mscc: Fix memory leak when using one step timestamping ...