From: Ian Munsie on
These patches add the required mappings to use perf probe on PowerPC.

Functionality wise it requires patch 359e4284a3f37aba7fd06d993863de2509d86f54
from the powerpc-next tree to provide the HAVE_REGS_AND_STACK_ACCESS_API
required for CONFIG_KPROBE_EVENT. The code will still compile cleanly without
it and will fail gracefully at runtime on the missing CONFIG_KPROBE_EVENT
support as before.

Part 1 of the patch series moves the arch dependent x86 32 and 64 bit DWARF
register number mappings out into a separate arch directory and adds the
necessary Makefile foo to use it.

Part 2 of the patch series adds the PowerPC mappings.


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