"The 'sparse' utility has long been one of Linux's best-kept
secrets. It is a static analysis tool which can find a wide variety
of bugs in the kernel code base; sparse is a useful tool, but it
can be surprisingly hard to find. It has never had a web page, and
almost no distributions package it. Interested users must, instead,
track down the git tree or Dave Jones's snapshot directory.
"Sparse was originally written by Linus Torvalds, but he has not
done much with it for a while, and he recently suggested that
somebody else should take it over..."