Important update: we are proposing a more modern engine to index big projects like the Linux kernel. Check out Elixir.
LXR (Linux Cross Reference) is a great source indexing tool, particularly useful for big projects like the Linux kernel.
Here are Internet sites that make it easy to explore the Linux sources thanks to the LXR engine:
The original site running LXR on Linux sources.
Free Electrons’ LXR site, up and running for years!
- Missing Link Electronics
Also supporting U-boot, BusyBox and QEMU
- Tomoyo LXR
From the Tomoyo Linux project.
Please let us know if you know about other LXR sites!
You can also browse Linus Torvalds’ GIT tree.