ACPI fixes for v4.11-rc5 - 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).