- Drop the unconditional setting of the '-Os' gcc flag from the ACPI
Makefile to make the function graph tracer work correctly with the
ACPI subsystem (Josh Poimboeuf).
- Add missing synchronize_rcu() to ghes_remove() which removes an
element from an RCU-protected list, but fails to synchronize it
properly afterward (James Morse).
- Fix two problems related to IOAPIC hotplug, a local variable
initialization in setup_res() and the creation of platform
device objects for IO(x)APICs which are (a) unused and (b) leaked
on hot-removal (Joerg Roedel).