Linus Torvalds 827751b699 Merge tag 'riscv-for-linus-7.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
 "From a RISC-V point of view, there's one notable fix here, reverting
  an earlier bogus fix to the pointer masking code. Fortunately the
  practical impact appears to be small.

   - Revert a bad fix, likely LLM-generated, in the pointer masking code
     that confused the RISC-V hardware pointer masking implementation
     with the Linux kernel tagged address feature

   - Fix unexpected faults caused by kprobe instruction slot writes when
     !CONFIG_STRICT_MODULE_RWX

   - Fix unexpected faults on minimal configurations during runtime code
     patching on !CONFIG_STRICT_MODULE_RWX systems

   - Fix a misplaced variable clear causing incorrect reuse of previous
     values in the RISC-V hardware feature probing code

   - Fix two bugs in the PMU SBI perf code on rv32: use BIT_ULL rather
     than BIT on 64-bit masks; and use a bitmap rather than an unsigned
     long on a quantity that can exceed 32 bits

  And a few miscellaneous cleanups:

   - Avoid a potential dereference-before-NULL-pointer-check bug in the
     PMU SBI perf driver

   - Use CONFIG_GENERIC_BUG_RELATIVE_POINTERS to simplify the rv32 bug
     table code (like x86 and PPC)

   - Report the RISC-V standard ISA extensions Z[v]fhmin when support is
     claimed for the superset RISC-V standard ISA extensions Z[v]fh; and
     simplify our FPU test code to only check for the presence of the D
     extension

   - Use an existing kernel string helper in place of some open-coded
     code in kernel/usercfi.c

   - Fix some yamllint issues in the RISC-V DT bindings for CPUs

   - Convert one use of __ASSEMBLY__ to __ASSEMBLER__ that snuck into
     the RISC-V CFI selftest code

   - Update the translation for the simplified Chinese translation of
     the RISC-V kernel patch acceptance policy"

* tag 'riscv-for-linus-7.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: skip software algning code for HAVE_EFFICIENT_UNALIGNED_ACCESS
  kselftest/riscv: Replace __ASSEMBLY__ with __ASSEMBLER__
  docs/zh_CN: Update arch/riscv/patch-acceptance.rst translation
  dt-bindings: riscv: cpus: Fix yamllint style issues
  riscv: hwprobe: simplify has_fpu() to check D extension only
  perf: RISC-V: check cpu_hw_evt before dereference in overflow IRQ
  riscv: report Zfhmin/Zvfhmin when Zfh/Zvfh are present
  perf: RISC-V: store available counter mask as bitmap
  perf: RISC-V: use BIT_ULL for u64 overflow masks
  riscv: bug: Make RV32 use GENERIC_BUG_RELATIVE_POINTERS
  riscv: hwprobe: initialize pair->value in hwprobe_one_pair()
  riscv: use string helper in setup_global_riscv_enable()
  Revert "riscv: Reset pmm when PR_TAGGED_ADDR_ENABLE is not set"
  riscv: patch: skip fixmap mapping when kernel text is already writable
  riscv: mm: make EXECMEM_KPROBES writable without CONFIG_STRICT_MODULE_RWX
2026-09-11 13:15:13 -07:00
2026-01-26 19:07:09 -08:00
2022-09-28 09:02:20 +02:00
2025-02-19 14:53:27 -07:00
2026-09-06 15:07:20 -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
S
Description
No description provided
Readme
3.8 GiB
Languages
C 96.9%
Assembly 0.9%
Rust 0.6%
Shell 0.6%
Python 0.5%
Other 0.3%