This release of Is Parallel Programming Hard, And, If So, What Can You Do About It? features the (very skeletal) beginnings of the data-structures chapter, twelve new cartoons, and general updates to the first seven chapters. It also includes contributions from Kornilios Kourtis, Namhyung Kim, Ricardo Fabbri and his class, and Yuchen Dai.
As always, git://git.kernel.org/pub/scm/linux/kerne

Comments
Can't say as I know which would crack first, the passphrases or the minds of the people attempting to program it!