diff options
Diffstat (limited to 'kernel/trace/trace_events_hist.c')
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 71b453576d85..452daad7cfb3 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -304,6 +304,10 @@ static u64 hist_field_div(struct hist_field *hist_field, if (!val2) return -1; + /* Use shift if the divisor is a power of 2 */ + if (!(val2 & (val2 - 1))) + return val1 >> __ffs64(val2); + return div64_u64(val1, val2); } |