Merge "X86_64: Replace x86_64 xchg instruction use" am: a1eff4f
am: 01098af

* commit '01098af7a530ca65dcf5a40b3799c5147e49bd64':
  X86_64: Replace x86_64 xchg instruction use

Change-Id: Ifbc573d474fe34e6892ee323d53fc93c95c53dba