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-rw-r--r--tools/perf/util/pmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 9bdc60c6f138..b93ff146766e 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -548,7 +548,7 @@ void perf_pmu__set_format(unsigned long *bits, long from, long to)
if (!to)
to = from;
- memset(bits, 0, BITS_TO_LONGS(PERF_PMU_FORMAT_BITS));
+ memset(bits, 0, BITS_TO_BYTES(PERF_PMU_FORMAT_BITS));
for (b = from; b <= to; b++)
set_bit(b, bits);
}