PERF_HPP_DIFF__MAX_INDEX
for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
} columns[PERF_HPP_DIFF__MAX_INDEX] = {
BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];