The 5.1 kernel has been released

Linus has released the 5.1 kernel, right onschedule. Some of the significant changes in the release include BPF spinlocks, more year-2038 preparation, the TEO CPU-idle governor, The io_uring fast asynchronous I/O mechanism,initial support for pidfds (file descriptors that refer to a process), theSafeSetID security module, and much more.See the KernelNewbies 5.1page for lots of details.