+2016-04-26 Userspace RCU 0.8.9
+ * Fix: handle reference count overflow
+ * Fix: compat_futex should work-around futex signal-restart kernel bug
+ * Fix: urcu-signal: smp_mb_master() needs registry lock
+ * Fix: rculfhash only needs to include urcu-pointers.h
+ * Fix: format string signedness
+ * Use gcc atomics on aarch64/powerpc64le
+ * Fix: compat_futex: uninitialized ret variable
+ * Fix: compat_futex_noasync: don't override return value
+ * Fix: stable-0.8 branch does not have syscall-compat.h
+ * Fix: dynamic fallback to compat futex on sys_futex ENOSYS
+