Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

Merge branch 'ras-core-for-linus' of git://git./linux/kernel/git/tip/tip

Pull RAS updates from Borislav Petkov:
 "The latest meager RAS updates:

   - Enable processing of action-optional MCEs which have the Overflow
     bit set (Tony Luck)

   - -Wmissing-prototypes warning fix and a build fix (Valdis
     Klētnieks)"

* 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  RAS: Build debugfs.o only when enabled in Kconfig
  RAS: Fix prototype warnings
  x86/mce: Don't check for the overflow bit on action optional machine checks