[PATCH v2 00/10] powerpc/hv-24x7: Reorganize single_24x7_request()

[Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>]

We currently issue a new hcall for to retrieve the value of each 24x7
counter that we want to read.  However, the H_GET_24x7_DATA hcall can
retrieve several counters in a single call, which would be useful in
getting a more consistent snapshot of the system.

Reorganize the code that prepares a 24x7 hcall request, submits it and
processes the result to allow reading seveal counters at once. We still
submit a fresh hcall for each event for now. A follow-on patch-set will
build on this to submit multiple perf_events in a single hcall.

Thanks to Peter Zijlstra for his input.

Changelog[v2]
	- Split independent changes in patch 2 into patch 3.
	- Minor changes to pr_err() (Patch 4).
	- Move whitespace changes to separate patch (Patch  8).
	- Minor function renames (Patch 10).

Sukadev Bhattiprolu (10):
  powerpc/hv-24x7: Modify definition of request and result buffers
  powerpc/hv24x7: Remove unnecessary parameter
  perf/hv24x7: Use pr_devel() to log message
  powerpc/hv-24x7: Drop event_24x7_request()
  powerpc/hv24x7: Move debug prints to separate function
  powerpc/hv-24x7: Rename hv_24x7_event_update
  powerpc/hv-24x7: Define add_event_to_24x7_request()
  perf/hv24x7: Whitespace cleanup
  powerpc/hv-24x7: Define update_event_count()
  powerpc/hv-24x7: Break up single_24x7_request

 arch/powerpc/perf/hv-24x7.c | 212 +++++++++++++++++++++++++++-----------------
 arch/powerpc/perf/hv-24x7.h |   8 +-
 2 files changed, 137 insertions(+), 83 deletions(-)

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1.8.3.1