Linus Torvalds b2d929a1c2 Merge tag 'riscv-for-linus-7.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
 "Several security fixes, a significant strnlen() regression fix, and
  several other miscellaneous fixes:

   - Fix a regression in the Zbb-enabled strnlen() implementation when
     huge counts are specified

   - When userspace pointer masking is enabled, strip the tag from
     user-specified pointers in two spots in the RISC-V futex code where
     this was missing

   - When CONFIG_SHADOW_CALL_STACK=y, use a supervisor mode-only CSR bit
     to determine whether the trap came from userspace or not, rather
     than a userspace-writable register

   - Reset the HSTATUS.HU bit during CPU initialization to avoid
     unexpected behavior, as the RISC-V specification does not require
     this bit to be hardware-reset

   - Fix the T-Head GhostWrite probing code when
     !CONFIG_ERRATA_THEAD_MAE

   - Fix RV32 boots using 32-bit.config by constraining NR_CPUS

   - Implement a workaround for SiFive MAL-9092, which requires fences
     around hypervisor load/store instructions

   - Fix the RISC-V patch_map() code to work properly for EXECMEM
     addresses when !CONFIG_STRICT_MODULE_RWX

   - Fix ptrace register set access reporting when CFI landing pad or
     shadow stack support is enabled

   - Avoid copying garbage into the target's vstate when
     PTRACE_SETREGSET is called with a short iov_len

   - Fix load_unaligned_zeropad() on RV32 kernels with
     CONFIG_RISCV_EFFICIENT_UNALIGNED_ACCESS=y

   - Fix build breakage for any userspace program that includes
     uapi/asm/vendor/mips.h

   - Fix a build warning for 32-bit allmodconfig builds related to
     SiFive errata

   - Fix misspecified inline assembly constraints in the vector context
     save/restore code"

* tag 'riscv-for-linus-7.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: fix load_unaligned_zeropad() fixup for RV32
  riscv: entry: gate shadow call stack reload on sstatus.SPP, not tp
  riscv: ptrace: Zero-initialize regset buffers before copyin
  riscv: ptrace: reject CFI regset access when extensions are absent
  riscv: fix NR_CPUS range leaking 64-bit default onto 32-bit builds
  riscv: errata: select RISCV_ALTERNATIVE_EARLY for THEAD GHOSTWRITE
  riscv: futex: untag the user pointer before the atomic access
  riscv: lib: Fix ZBB strnlen wrap-around regression on huge counts
  riscv: patch: fix handling of bpf-jit execmem addresses
  RISC-V: Clear HSTATUS.HU on CPU initialization
  RISC-V: errata: Add SiFive MAL-9092 workaround
  riscv: vector: Fix output operands in context save
  riscv: vector: Fix data pointer constraints in context save/restore
  riscv: limit sifive errata to CONFIG_64BIT
  riscv: hwprobe: use _BITULL() rather than BIT() in MIPS vendor uapi header
2026-10-11 08:13:52 -07:00
2026-01-26 19:07:09 -08:00
…
…
2026-10-04 13:45:25 -07:00
2026-07-15 10:51:29 -06:00

Linux kernel
============

The Linux kernel is the core of any Linux operating system. It manages hardware,
system resources, and provides the fundamental services for all other software.

Quick Start
-----------

* Report a bug: See Documentation/admin-guide/reporting-issues.rst
* Get the latest kernel: https://kernel.org
* Build the kernel: See Documentation/admin-guide/quickly-build-trimmed-linux.rst
* Join the community: https://lore.kernel.org/

Essential Documentation
-----------------------

All users should be familiar with:

* Building requirements: Documentation/process/changes.rst
* Code of Conduct: Documentation/process/code-of-conduct.rst
* License: See COPYING

Documentation can be built with make htmldocs or viewed online at:
https://www.kernel.org/doc/html/latest/


Who Are You?
============

Find your role below:

* New Kernel Developer: Getting started with kernel development
* Academic Researcher: Studying kernel internals and architecture
* Security Expert: Hardening and vulnerability analysis
* Backport/Maintenance Engineer: Maintaining stable kernels
* System Administrator: Configuring and troubleshooting
* Maintainer: Leading subsystems and reviewing patches
* Hardware Vendor: Writing drivers for new hardware
* Distribution Maintainer: Packaging kernels for distros
* AI Coding Assistant: LLMs and AI-powered development tools


For Specific Users
==================

New Kernel Developer
--------------------

Welcome! Start your kernel development journey here:

* Getting Started: Documentation/process/development-process.rst
* Your First Patch: Documentation/process/submitting-patches.rst
* Coding Style: Documentation/process/coding-style.rst
* Build System: Documentation/kbuild/index.rst
* Development Tools: Documentation/dev-tools/index.rst
* Kernel Hacking Guide: Documentation/kernel-hacking/hacking.rst
* Core APIs: Documentation/core-api/index.rst

Academic Researcher
-------------------

Explore the kernel's architecture and internals:

* Researcher Guidelines: Documentation/process/researcher-guidelines.rst
* Memory Management: Documentation/mm/index.rst
* Scheduler: Documentation/scheduler/index.rst
* Networking Stack: Documentation/networking/index.rst
* Filesystems: Documentation/filesystems/index.rst
* RCU (Read-Copy Update): Documentation/RCU/index.rst
* Locking Primitives: Documentation/locking/index.rst
* Power Management: Documentation/power/index.rst

Security Expert
---------------

Security documentation and hardening guides:

* Security Documentation: Documentation/security/index.rst
* LSM Development: Documentation/security/lsm-development.rst
* Self Protection: Documentation/security/self-protection.rst
* Reporting Vulnerabilities: Documentation/process/security-bugs.rst
* CVE Procedures: Documentation/process/cve.rst
* Embargoed Hardware Issues: Documentation/process/embargoed-hardware-issues.rst
* Security Features: Documentation/userspace-api/seccomp_filter.rst

Backport/Maintenance Engineer
-----------------------------

Maintain and stabilize kernel versions:

* Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst
* Backporting Guide: Documentation/process/backporting.rst
* Applying Patches: Documentation/process/applying-patches.rst
* Subsystem Profile: Documentation/maintainer/maintainer-entry-profile.rst
* Git for Maintainers: Documentation/maintainer/configure-git.rst

System Administrator
--------------------

Configure, tune, and troubleshoot Linux systems:

* Admin Guide: Documentation/admin-guide/index.rst
* Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst
* Sysctl Tuning: Documentation/admin-guide/sysctl/index.rst
* Tracing/Debugging: Documentation/trace/index.rst
* Performance Security: Documentation/admin-guide/perf-security.rst
* Hardware Monitoring: Documentation/hwmon/index.rst

Maintainer
----------

Lead kernel subsystems and manage contributions:

* Maintainer Handbook: Documentation/maintainer/index.rst
* Pull Requests: Documentation/maintainer/pull-requests.rst
* Managing Patches: Documentation/maintainer/modifying-patches.rst
* Rebasing and Merging: Documentation/maintainer/rebasing-and-merging.rst
* Development Process: Documentation/process/maintainer-handbooks.rst
* Maintainer Entry Profile: Documentation/maintainer/maintainer-entry-profile.rst
* Git Configuration: Documentation/maintainer/configure-git.rst

Hardware Vendor
---------------

Write drivers and support new hardware:

* Driver API Guide: Documentation/driver-api/index.rst
* Driver Model: Documentation/driver-api/driver-model/driver.rst
* Device Drivers: Documentation/driver-api/infrastructure.rst
* Bus Types: Documentation/driver-api/driver-model/bus.rst
* Device Tree Bindings: Documentation/devicetree/bindings/
* Power Management: Documentation/driver-api/pm/index.rst
* DMA API: Documentation/core-api/dma-api.rst

Distribution Maintainer
-----------------------

Package and distribute the kernel:

* Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst
* ABI Documentation: Documentation/ABI/README
* Kernel Configuration: Documentation/kbuild/kconfig.rst
* Module Signing: Documentation/admin-guide/module-signing.rst
* Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst
* Tainted Kernels: Documentation/admin-guide/tainted-kernels.rst

AI Coding Assistant
-------------------

CRITICAL: If you are an LLM or AI-powered coding assistant, you MUST read and
follow the AI coding assistants documentation before contributing to the Linux
kernel:

* Documentation/process/coding-assistants.rst

This documentation contains essential requirements about licensing, attribution,
and the Developer Certificate of Origin that all AI tools must comply with.


Communication and Support
=========================

* Mailing Lists: https://lore.kernel.org/
* IRC: #kernelnewbies on irc.oftc.net
* Bugzilla: https://bugzilla.kernel.org/
* MAINTAINERS file: Lists subsystem maintainers and mailing lists
* Email Clients: Documentation/process/email-clients.rst
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