[PATCH v21 14/19] perf, tools, jevents: Handle header line in mapfile

[Sukadev Bhattiprolu]

From: Andi Kleen <ak at linux.intel.com>

To work with existing mapfiles, assume that the first line in
'mapfile.csv' is a header line and skip over it.

Signed-off-by: Andi Kleen <ak at linux.intel.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa at redhat.com>
Acked-by: Ingo Molnar <mingo at kernel.org>
---

Changelog[v2]
	All architectures may not use the "Family" to identify. So,
	assume first line is header.
---
 tools/perf/pmu-events/jevents.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index f550cad..9cdfbaa 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -492,7 +492,12 @@ static int process_mapfile(FILE *outfp, char *fpath)
 
 	print_mapping_table_prefix(outfp);
 
-	line_num = 0;
+	/* Skip first line (header) */
+	p = fgets(line, n, mapfp);
+	if (!p)
+		goto out;
+
+	line_num = 1;
 	while (1) {
 		char *cpuid, *version, *type, *fname;
 
@@ -536,8 +541,8 @@ static int process_mapfile(FILE *outfp, char *fpath)
 		fprintf(outfp, "},\n");
 	}
 
+out:
 	print_mapping_table_suffix(outfp);
-
 	return 0;
 }
 
-- 
1.8.3.1