From: Adrian Hunter <[email protected]>

Ensure the id_pos is correct when perf_evlist__open() is used.

This fixes a problem introduced in 7556257 that broke 'perf kvm stat
live' in that this tool wasn't updated to use the sample_type bits
setting helpers.

Signed-off-by: Adrian Hunter <[email protected]>
Tested-by: David Ahern <[email protected]>
Acked-by: David Ahern <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: 
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/util/evlist.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 7101283..f9f77be 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -64,6 +64,16 @@ void perf_evlist__set_id_pos(struct perf_evlist *evlist)
        evlist->is_pos = first->is_pos;
 }
 
+static void perf_evlist__update_id_pos(struct perf_evlist *evlist)
+{
+       struct perf_evsel *evsel;
+
+       list_for_each_entry(evsel, &evlist->entries, node)
+               perf_evsel__calc_id_pos(evsel);
+
+       perf_evlist__set_id_pos(evlist);
+}
+
 static void perf_evlist__purge(struct perf_evlist *evlist)
 {
        struct perf_evsel *pos, *n;
@@ -920,6 +930,8 @@ int perf_evlist__open(struct perf_evlist *evlist)
        struct perf_evsel *evsel;
        int err;
 
+       perf_evlist__update_id_pos(evlist);
+
        list_for_each_entry(evsel, &evlist->entries, node) {
                err = perf_evsel__open(evsel, evlist->cpus, evlist->threads);
                if (err < 0)
-- 
1.8.1.4

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