[RFC PATCH 0/3]perf/core: extend perf_reg and perf_sample_regs_intr

[Peter Zijlstra]

On Thu, Nov 05, 2015 at 02:16:15AM +0530, Madhavan Srinivasan wrote:
> Second patch updates struct arch_misc_reg for arch/powerpc with pmu registers
> and adds offsetof macro for the same. It extends perf_reg_value()
> to use reg idx to decide on struct to return value from.

Why; what's in those regs?