[PATCH] tools/perf, rbtree: Add RCU wrappers to make rbtree.h usable in user-space

From: Ingo Molnar
Date: Wed Jun 17 2015 - 05:07:11 EST

Reported-by: Riku Voipio <riku.voipio@xxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
tools/perf/util/include/linux/rcupdate.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/tools/perf/util/include/linux/rcupdate.h b/tools/perf/util/include/linux/rcupdate.h
new file mode 100644
index 000000000000..3e022dd9a69b
--- /dev/null
+++ b/tools/perf/util/include/linux/rcupdate.h
@@ -0,0 +1,9 @@
+/* Simple trivial wrappers for now, we don't use RCU in perf user-space (yet): */
+#define WRITE_ONCE(var, val) ((var) = (val))
+#define rcu_assign_pointer(ptr, val) WRITE_ONCE(ptr, val)
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