[tip:perf/core] perf callchain: Add callchain_cursor_snapshot()

[tip-bot for Namhyung Kim]

Commit-ID:  be1f13e30862ab6b0fffaecd556856a965cefa0c
Gitweb:     http://git.kernel.org/tip/be1f13e30862ab6b0fffaecd556856a965cefa0c
Author:     Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Mon, 10 Sep 2012 13:38:00 +0900
Committer:  Jiri Olsa <jolsa@xxxxxxxxxx>
CommitDate: Sun, 1 Jun 2014 14:34:59 +0200

perf callchain: Add callchain_cursor_snapshot()

The callchain_cursor_snapshot() is for saving current status of the
callchain.  It'll be used to accumulate callchain information for each node.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Tested-by: Arun Sharma <asharma@xxxxxx>
Tested-by: Rodrigo Campos <rodrigo@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1401335910-16832-9-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/util/callchain.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 24a53d5..8f84423 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -167,4 +167,13 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
 
 extern const char record_callchain_help[];
 int parse_callchain_report_opt(const char *arg);
+
+static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
+					     struct callchain_cursor *src)
+{
+	*dest = *src;
+
+	dest->first = src->curr;
+	dest->nr -= src->pos;
+}
 #endif	/* __PERF_CALLCHAIN_H */
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/