From 6a2ffcddad22ead7ce75c5773e87895b91e7cca7 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Fri, 22 May 2015 13:45:24 -0300
Subject: perf tools: Protect accesses the map rbtrees with a rw lock

To allow concurrent access, next step: refcount struct map instances, so
that we can ditch maps->removed_maps and stop leaking threads, maps,
then struct DSO needs the same treatment.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-o45w2w5dzrza38nzqxnqzhyf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/map.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'tools/perf/util/map.h')

diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index e3702fd..6796f27 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -5,6 +5,7 @@
 #include <linux/compiler.h>
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include <pthread.h>
 #include <stdio.h>
 #include <stdbool.h>
 #include <linux/types.h>
@@ -60,6 +61,7 @@ struct kmap {
 
 struct maps {
 	struct rb_root	 entries;
+	pthread_rwlock_t lock;
 	struct list_head removed_maps;
 };
 
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