tree 954cdde1913d243e517596aab5718dfa65fcd800
parent 9e8066f398396d26010d9c6c3c2538ff25461ef8
author Michael Ellerman <mpe@ellerman.id.au> 1469536158 +1000
committer Michael Ellerman <mpe@ellerman.id.au> 1470014096 +1000

powerpc/kernel: Check features don't change after patching

Early in boot we binary patch some sections of code based on the CPU and
MMU feature bits. But it is a one-time patching, there is no facility
for repatching the code later if the set of features change.

It is a major bug if the set of features changes after we've done the
code patching - so add a check for it.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>