From: Stephane Eranian <eranian@google.com>
Date: Mon, 6 Jun 2011 14:57:08 +0000 (+0200)
Subject: perf_events: Fix validation of events using an extra reg
X-Git-Tag: v3.1-rc1~299^2~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd8a38d33e2528998998bae70a45ad27e442f114;p=pandora-kernel.git

perf_events: Fix validation of events using an extra reg

The validate_group() function needs to validate events with
extra shared regs. Within an event group, only events with
the same value for the extra reg can co-exist. This was not
checked by validate_group() because it was missing the
shared_regs logic.

This patch changes the allocation of the fake cpuc used for
validation to also point to a fake shared_regs structure such
that group events be properly testing.

It modifies __intel_shared_reg_get_constraints() to use
spin_lock_irqsave() to avoid lockdep issues.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110606145708.GA7279@quad
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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