[PATCH 0/4] selftests, x86: updates for x86 protection keys self tests

[Dave Hansen]

The memory protection keys selftests are spewing warnings.  This
fixes them up.  Thanks, Shuah, for sending these first two a few
weeks ago!  I wrongly assumed they would get picked up somewhere.

I also included a fix that affected the 32-bit version of the
pkeys test case.  It was parsing the siginfo incorrectly.