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powerpc/perf: Don't enable if we have zero events
authorMichael Ellerman <michael@ellerman.id.au>
Fri, 28 Jun 2013 08:15:14 +0000 (18:15 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 1 Jul 2013 01:50:03 +0000 (11:50 +1000)
In power_pmu_enable() we still enable the PMU even if we have zero
events. This should have no effect but doesn't make much sense. Instead
just return after telling the hypervisor that we are not using the PMCs.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
CC: <stable@vger.kernel.org> [v3.10]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/perf/core-book3s.c patch | blob | history

diff --cc arch/powerpc/perf/core-book3s.c
Simple merge
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