sparc64: Fix maybe_change_configuration() PCR setting.



Need to mask out the existing event bits before OR'ing in
the new ones.

Noticed by Peter Zijlstra.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 0d0659c7

arch/sparc/kernel/perf_event.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -655,6 +655,7 @@ static u64 maybe_change_configuration(struct cpu_hw_events *cpuc, u64 pcr)
		cpuc->current_idx[i] = idx;

		enc = perf_event_get_enc(cpuc->events[i]);
		pcr &= ~mask_for_index(idx);
		pcr \|= event_encoding(enc, idx);
		}
		out: