These two patches implement get_cpu_str() for powerpc.
get_cpu_str() will allow users to cache their perf event JSON files
and skip having to specify the --events-file with each perf invocation.
These patches are based on the commit
commit 4a5e890
Author: Andi Kleen <a...@linux.intel.com>
Date: Fri Jun 13 15:14:14 2014 -0700
perf, tools: Add a --no-desc flag to perf list
in Andi Kleen's tree
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc
At this point, I am mostly looking for feedback on the changes around
cache_cpu_str() and the get_cpu_str().
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