[PATCH 12/32] perf callchain: Do not report zero address in unwind

[Arnaldo Carvalho de Melo]

From: Jiri Olsa <jolsa@xxxxxxxxxx>

We are not interested in zero addresses in callchain, do not report
them.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Jean Pihet <jean.pihet@xxxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jean Pihet <jean.pihet@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1389098853-14466-8-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/unwind.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
index bff3209305e1..3b7018102dfb 100644
--- a/tools/perf/util/unwind.c
+++ b/tools/perf/util/unwind.c
@@ -563,7 +563,7 @@ static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
 		unw_word_t ip;
 
 		unw_get_reg(&c, UNW_REG_IP, &ip);
-		ret = entry(ip, ui->thread, ui->machine, cb, arg);
+		ret = ip ? entry(ip, ui->thread, ui->machine, cb, arg) : 0;
 	}
 
 	unw_destroy_addr_space(addr_space);
-- 
1.8.1.4

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