From: Stephane Eranian <eranian@google.com>
Date: Mon, 6 Jun 2011 14:57:03 +0000 (+0200)
Subject: perf_events: Update Intel extra regs shared constraints management
X-Git-Tag: v3.1-rc1~299^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=efc9f05df2dd171280dcb736a4d973ffefd5508e;p=pandora-kernel.git

perf_events: Update Intel extra regs shared constraints management

This patch improves the code managing the extra shared registers
used for offcore_response events on Intel Nehalem/Westmere. The
idea is to use static allocation instead of dynamic allocation.
This simplifies greatly the get and put constraint routines for
those events.

The patch also renames per_core to shared_regs because the same
data structure gets used whether or not HT is on. When HT is
off, those events still need to coordination because they use
a extra MSR that has to be shared within an event group.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110606145703.GA7258@quad
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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