From 6f6539cad926f55d5eb6e79d05bbe99f0d54d56d Mon Sep 17 00:00:00 2001
From: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com>
Date: Mon, 17 Nov 2014 20:06:57 +0100
Subject: [PATCH] perf/x86/intel: Add cross-HT counter exclusion infrastructure

This patch adds a new shared_regs style structure to the
per-cpu x86 state (cpuc). It is used to coordinate access
between counters which must be used with exclusion across
HyperThreads on Intel processors. This new struct is not
needed on each PMU, thus is is allocated on demand.

Signed-off-by: Maria Dimakopoulou <maria.n.dimakopoulou@gmail.com>
[peterz: spinlock_t -> raw_spinlock_t]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Stephane Eranian <eranian@google.com>
Cc: bp@alien8.de
Cc: jolsa@redhat.com
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1416251225-17721-6-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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