html/latest - Kernel Documentation (new sphinx format).
htmldocs - Kernel Documentation in docbook format (deprecated).
README various README files scattered around Linux kernel source
LP64 standard defining the size of char, short, int, and long on 32-bit and 64-bit platforms. (See also the rationale for the standard, and the legacy reasons another OS declined to adopt this standard).
Linux Foundation's specs page (ELF, Dwarf, ABI...)
Unified Linux-kernel git repository, with complete history from 0.0.1 to the present
All Linux Weekly News kernel articles indexed by topic
Linux kernel changelog (summary of what's new in each version)
H-Online's Kernel-Log (most recent first)
Understanding the Linux Virtual Memory Manager, online book by Mel Gorman.
If you have any questions or concerns, please email helpdesk at kernel dot org.