[PATCH 0/3] x86, pkeys: make pkey 0 more normal

[Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>]

This restores pkey 0 to more of a state of normalcy and adds a
new test in the pkeys selftest to make sure it stays that way.

Cc: Ram Pai <linuxram@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Michael Ellermen <mpe@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>p
Cc: Shuah Khan <shuah@xxxxxxxxxx>