am df2f5a07: am d55f0adf: Qualify the source argument of atomic loads as a const pointer.

Merge commit 'df2f5a07aecac7be4ac2d1100668a0396fd256e7'

* commit 'df2f5a07aecac7be4ac2d1100668a0396fd256e7':
  Qualify the source argument of atomic loads as a const pointer.