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[PATCH 1/3] perf tools: Fix cpu conversion in cpu_map__from_entries

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We can't convert u16 cpu_map_entries::cpu[x] value directly to int,
because it could hold -1, which would be converted as 65535.

Adding special treatment for -1, which is not real cpu number,
to be converted to (int -1).

Link: http://lkml.kernel.org/n/tip-6t5lp407ca76zlikz9rl2lcm@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/cpumap.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index a0717b93d8f5..fa935093a599 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -188,8 +188,17 @@ static struct cpu_map *cpu_map__from_entries(struct cpu_map_entries *cpus)
 	if (map) {
 		unsigned i;
 
-		for (i = 0; i < cpus->nr; i++)
-			map->map[i] = (int)cpus->cpu[i];
+		for (i = 0; i < cpus->nr; i++) {
+			/*
+			 * Special treatment for -1, which is not real cpu number,
+			 * and we need to use (int) -1 to initialize map[i],
+			 * otherwise it would become 65535.
+			 */
+			if (cpus->cpu[i] == (u16) -1)
+				map->map[i] = -1;
+			else
+				map->map[i] = (int) cpus->cpu[i];
+		}
 	}
 
 	return map;
-- 
2.4.3

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[PATCHv9 0/3] perf stat: Add scripting support Jiri Olsa <jolsa@kernel.org> - 2016-01-06 12:00 +0100
  [PATCH 1/3] perf tools: Fix cpu conversion in cpu_map__from_entries Jiri Olsa <jolsa@kernel.org> - 2016-01-06 12:00 +0100
    [tip:perf/core] perf cpumap:   Fix cpu conversion in cpu_map__from_entries tip-bot for Jiri Olsa <tipbot@zytor.com> - 2016-01-09 17:40 +0100
  [PATCH 2/3] perf script: Display stat events by default Jiri Olsa <jolsa@kernel.org> - 2016-01-06 12:00 +0100
    [tip:perf/core] perf script: Display stat events by default tip-bot for Jiri Olsa <tipbot@zytor.com> - 2016-01-09 17:40 +0100
  [PATCH 3/3] perf script: Add stat-cpi.py script Jiri Olsa <jolsa@kernel.org> - 2016-01-06 12:00 +0100
    [tip:perf/core] perf script: Add stat-cpi.py script tip-bot for Jiri Olsa <tipbot@zytor.com> - 2016-01-09 17:40 +0100
  Re: [PATCHv9 0/3] perf stat: Add scripting support Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-06 15:20 +0100
    Re: [PATCHv9 0/3] perf stat: Add scripting support Jiri Olsa <jolsa@redhat.com> - 2016-01-06 15:40 +0100
      Re: [PATCHv9 0/3] perf stat: Add scripting support Arnaldo Carvalho de Melo <acme@kernel.org> - 2016-01-06 16:10 +0100
        Re: [PATCHv9 0/3] perf stat: Add scripting support Jiri Olsa <jolsa@redhat.com> - 2016-01-06 16:40 +0100

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