[PATCH 01/22] libperf: Add comments to perf_cpu_map.

[Ian Rogers]

A particular observed problem is confusing the index with the CPU value,
documentation should hopefully reduce this type of problem.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/lib/perf/include/internal/cpumap.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/lib/perf/include/internal/cpumap.h b/tools/lib/perf/include/internal/cpumap.h
index 840d4032587b..1c1726f4a04e 100644
--- a/tools/lib/perf/include/internal/cpumap.h
+++ b/tools/lib/perf/include/internal/cpumap.h
@@ -4,9 +4,16 @@
 
 #include <linux/refcount.h>
 
+/**
+ * A sized, reference counted, sorted array of integers representing CPU
+ * numbers. This is commonly used to capture which CPUs a PMU is associated
+ * with.
+ */
 struct perf_cpu_map {
 	refcount_t	refcnt;
+	/** Length of the map array. */
 	int		nr;
+	/** The CPU values. */
 	int		map[];
 };
 
-- 
2.34.1.400.ga245620fadb-goog