[$] What became of getrandom() in the vDSO

In the previous episode of thevgetrandom() story, Jason Donenfeld had put together a version ofthe getrandom()system call that ran in user space, significantly improving performance forapplications that need a lot of random data while retaining all of theguarantees provided by the system call. At that time, it seemed that aconsensus had built around the implementation and that it was headed towardthe mainline in that form. A few milliseconds after that article wasposted, though, a Linus-Torvalds-shaped obstacle appeared in its path.That obstacle has been overcome and this work has now been merged for the6.11 kernel, but its form has changed somewhat.