[PATCH v2 0/2] lkdtm: Provide more complete coverage for REFCOUNT tests

[Kees Cook]

This is a short series to provide behavior and performance tests for
refcount_t, taking into account both CONFIG_REFCOUNT_FULL and the new
x86-fast protection.

-Kees

v2:
- Add additional tests using _not_zero() for saturate and overflow; hw.likun